subject:(differential scanning calorimetry)

Ruhr Universität Bochum

1. Bäcker, Tobias. Funktionelle ionische Flüssigkeiten.

Degree: 2012, Ruhr Universität Bochum

URL: http://nbn-resolving.de/urn/resolver.pl?urn=urn:nbn:de:hbz:294-35724

► In der vorliegenden Arbeit wurden 1-Butyl-3-methylimidazolium-tris(N,N-dialkyldithiocarbamato)uranylat-Salze mit variierenden Substituenten untersucht. Asymmetrische Substitution stellte sich als besonders geeignet zur Bildung ionischer Flüssigkeiten heraus. Des Weiteren wurden… (more)

Subjects/Keywords: Uran; Eisen; Magnetismus; Differential scanning calorimetry; Thermogravimetry

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APA (6^th Edition):

Bäcker, T. (2012). Funktionelle ionische Flüssigkeiten. (Thesis). Ruhr Universität Bochum. Retrieved from http://nbn-resolving.de/urn/resolver.pl?urn=urn:nbn:de:hbz:294-35724

Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation

Chicago Manual of Style (16^th Edition):

Bäcker, Tobias. “Funktionelle ionische Flüssigkeiten.” 2012. Thesis, Ruhr Universität Bochum. Accessed March 01, 2021. http://nbn-resolving.de/urn/resolver.pl?urn=urn:nbn:de:hbz:294-35724.

Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation

MLA Handbook (7^th Edition):

Bäcker, Tobias. “Funktionelle ionische Flüssigkeiten.” 2012. Web. 01 Mar 2021.

Vancouver:

Bäcker T. Funktionelle ionische Flüssigkeiten. [Internet] [Thesis]. Ruhr Universität Bochum; 2012. [cited 2021 Mar 01]. Available from: http://nbn-resolving.de/urn/resolver.pl?urn=urn:nbn:de:hbz:294-35724.

Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation

Council of Science Editors:

Bäcker T. Funktionelle ionische Flüssigkeiten. [Thesis]. Ruhr Universität Bochum; 2012. Available from: http://nbn-resolving.de/urn/resolver.pl?urn=urn:nbn:de:hbz:294-35724

Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation

2. 高瀬, 一馬. Evaluation of glass transition temperature and dynamic mechanical properties of autopolymerized hard direct denture reline resins : 常温重合型硬質リライン材のガラス転移温度および動力学的性質の評価法.

Degree: 博士(歯学), 2014, Nagasaki University / 長崎大学

URL: http://hdl.handle.net/10069/35494

► This study assessed methods for evaluation of glass transition temperature (Tg) of autopolymerized hard direct denture reline resins using dynamic mechanical analysis and differential scanning… (more)

Subjects/Keywords: Reline resin; Glass transition temperature; Dynamic mechanical analysis; Differential scanning calorimetry

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APA (6^th Edition):

高瀬, �. (2014). Evaluation of glass transition temperature and dynamic mechanical properties of autopolymerized hard direct denture reline resins : 常温重合型硬質リライン材のガラス転移温度および動力学的性質の評価法. (Thesis). Nagasaki University / 長崎大学. Retrieved from http://hdl.handle.net/10069/35494

Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation

Chicago Manual of Style (16^th Edition):

高瀬, 一馬. “Evaluation of glass transition temperature and dynamic mechanical properties of autopolymerized hard direct denture reline resins : 常温重合型硬質リライン材のガラス転移温度および動力学的性質の評価法.” 2014. Thesis, Nagasaki University / 長崎大学. Accessed March 01, 2021. http://hdl.handle.net/10069/35494.

Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation

MLA Handbook (7^th Edition):

高瀬, 一馬. “Evaluation of glass transition temperature and dynamic mechanical properties of autopolymerized hard direct denture reline resins : 常温重合型硬質リライン材のガラス転移温度および動力学的性質の評価法.” 2014. Web. 01 Mar 2021.

Vancouver:

高瀬 �. Evaluation of glass transition temperature and dynamic mechanical properties of autopolymerized hard direct denture reline resins : 常温重合型硬質リライン材のガラス転移温度および動力学的性質の評価法. [Internet] [Thesis]. Nagasaki University / 長崎大学; 2014. [cited 2021 Mar 01]. Available from: http://hdl.handle.net/10069/35494.

Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation

Council of Science Editors:

高瀬 �. Evaluation of glass transition temperature and dynamic mechanical properties of autopolymerized hard direct denture reline resins : 常温重合型硬質リライン材のガラス転移温度および動力学的性質の評価法. [Thesis]. Nagasaki University / 長崎大学; 2014. Available from: http://hdl.handle.net/10069/35494

Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation

3. Meng, Fan. Investigating Crystallization Tendency, Miscibility and Molecular interactions of drug-polymer systems for the development of amorphous solid dispersions.

Degree: M.S. in Pharmaceutical Sciences, Pharmaceutical Science (graduate program), 2015, Creighton University

URL: http://hdl.handle.net/10504/71263

► This project aims to characterize the crystallization tendencies, miscibility and molecular interaction in drug-polymer systems of poorly soluble drugs and correlate it with the performance… (more)

▼ This project aims to characterize the crystallization tendencies, miscibility and molecular interaction in drug-polymer systems of poorly soluble drugs and correlate it with the performance of prepared or reported SDs (solid dispersions). Crystallization tendencies of five different drugs [i.e. Curcumin (CUR), indomethacin (IND), flutaminde (FLU), dipyridamole (DIP), griseofulvin (GRI)] in absence and presence of four different polymers [i.e. polyethylene glycol (PEG), eudragit EPO (EPO), hydroxypropyl methylcellulose (HPMC) and polyvinyl pyrrolidone (PVP)] in various drug-polymer ratios were determined by using modulated differential scanning calorimetry (MDSC). Thermal analysis i.e. glass transition temperature (Tg), crystallinity and melting point depression along with theoretical calculations such as solubility parameter were performed to study drug polymer miscibility. Molecular interactions were predicted by using Tg deviations and molecular modeling. Physical states of drug in the SDs were characterized by X-ray diffraction (XRD) and MDSC. IR (Infrared) and Raman were used in selected systems (i.e. CUR, DIP and GRI systems) to explore the role of drug polymer interactions in amorphization of SDs. Dissolution studies using USP apparatus II and physical stability study at room temperature were performed for selected systems. Based on the absence and presence of endothermic and exothermic peaks (heat-cool-heat cycle) in MDSC, the crystallization tendency of pure drugs was categorized as low, moderate and high. In presence of selected polymers, crystallization tendency of all the drugs can be modified albeit high polymer concentration was required for drugs with high crystallization tendency i.e. DIP and GRI (> 50%w/w). Polymers showing greater effect on crystallization tendency of drugs were found to have higher drug-polymer miscibility and stronger molecular interactions. For example, FLU- PVP system showed good miscibility and no remarkable Tg deviation. This is reflected in its ability to change the crystallization tendency of FLU. Further, the results correlated well with the physical state, dissolution and stability of prepared/reported SDs. The developed approach has significant potential to be a rational screening method for the development of amorphous SDs. Advisors/Committee Members: Chauhan, Harsh V. (advisor), Meng, Fan (cuauthor).

Subjects/Keywords: Pharmaceutical Preparations – chemistry; Polymers – chemistry; Calorimetry, Differential Scanning; Solubility

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APA (6^th Edition):

Meng, F. (2015). Investigating Crystallization Tendency, Miscibility and Molecular interactions of drug-polymer systems for the development of amorphous solid dispersions. (Masters Thesis). Creighton University. Retrieved from http://hdl.handle.net/10504/71263

Chicago Manual of Style (16^th Edition):

Meng, Fan. “Investigating Crystallization Tendency, Miscibility and Molecular interactions of drug-polymer systems for the development of amorphous solid dispersions.” 2015. Masters Thesis, Creighton University. Accessed March 01, 2021. http://hdl.handle.net/10504/71263.

MLA Handbook (7^th Edition):

Meng, Fan. “Investigating Crystallization Tendency, Miscibility and Molecular interactions of drug-polymer systems for the development of amorphous solid dispersions.” 2015. Web. 01 Mar 2021.

Vancouver:

Meng F. Investigating Crystallization Tendency, Miscibility and Molecular interactions of drug-polymer systems for the development of amorphous solid dispersions. [Internet] [Masters thesis]. Creighton University; 2015. [cited 2021 Mar 01]. Available from: http://hdl.handle.net/10504/71263.

Council of Science Editors:

Meng F. Investigating Crystallization Tendency, Miscibility and Molecular interactions of drug-polymer systems for the development of amorphous solid dispersions. [Masters Thesis]. Creighton University; 2015. Available from: http://hdl.handle.net/10504/71263

University of Alberta

4. Wei, Wei. Thermal Analysis and Pyrolysis Pathways of Coal-Related Ether Compounds.

Degree: MS, Department of Chemical and Materials Engineering, 2013, University of Alberta

URL: https://era.library.ualberta.ca/files/j3860830s

► The stability of the ether bond affects coal dissolution during direct coal liquefaction and aliphatic ethers are reportedly the most reactive of the oxygenate classes… (more)

Subjects/Keywords: Ether bond; Coal liquefaction; Thermolysis; Differential scanning calorimetry

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APA (6^th Edition):

Wei, W. (2013). Thermal Analysis and Pyrolysis Pathways of Coal-Related Ether Compounds. (Masters Thesis). University of Alberta. Retrieved from https://era.library.ualberta.ca/files/j3860830s

Chicago Manual of Style (16^th Edition):

Wei, Wei. “Thermal Analysis and Pyrolysis Pathways of Coal-Related Ether Compounds.” 2013. Masters Thesis, University of Alberta. Accessed March 01, 2021. https://era.library.ualberta.ca/files/j3860830s.

MLA Handbook (7^th Edition):

Wei, Wei. “Thermal Analysis and Pyrolysis Pathways of Coal-Related Ether Compounds.” 2013. Web. 01 Mar 2021.

Vancouver:

Wei W. Thermal Analysis and Pyrolysis Pathways of Coal-Related Ether Compounds. [Internet] [Masters thesis]. University of Alberta; 2013. [cited 2021 Mar 01]. Available from: https://era.library.ualberta.ca/files/j3860830s.

Council of Science Editors:

Wei W. Thermal Analysis and Pyrolysis Pathways of Coal-Related Ether Compounds. [Masters Thesis]. University of Alberta; 2013. Available from: https://era.library.ualberta.ca/files/j3860830s

Penn State University

5. Hamad, Fawzi Ghassan. Flow-induced Crystallization in Isotactic Polypropylene.

Degree: 2015, Penn State University

URL: https://submit-etda.libraries.psu.edu/catalog/27276

► Brief intervals of strong flow stretch chains in a semicrystalline polymer melt, which results in an increase in the nuclei number density and a transformation… (more)

▼ Brief intervals of strong flow stretch chains in a semicrystalline polymer melt, which results in an increase in the nuclei number density and a transformation of the crystal structure. This flow-induced crystallization (FIC) phenomenon is explored in this study using highly isotactic polypropylene (iPP) samples. Using one synthesized and five commercial linear isotactic polypropylene samples, we investigate the FIC behavior by imposing shear onto these samples in a rotational rheometer. Equipped with a good temperature control and flexible shear protocol, we apply different temperature and flow conditions. The magnitude of the FIC effect varies with basic processing parameters (shear rate, specific work, crystallization temperature, and shearing temperature) and material properties (tacticity, molecular weight distribution, and particle concentration in the polymer). The scope of this study is to systematically investigate the influences of these parameters on FIC. The FIC effects that are investigated in this dissertation are: crystallization kinetics, persistence time of flow-induced nuclei, and crystal morphology. The crystallization time was measured in the rheometer by monitoring the onset of crystallization after quenching samples sheared above Tm. These samples were subsequently used to study their flow-induced nuclei persistence time and crystal morphology. The lifetime of flow-induced nuclei was determined by measuring the time required to return from FIC back to quiescent crystallization using a differential scanning calorimeter. The crystal morphology was imaged using polarized optical microscopy and atomic force microscopy. We investigated the influence of specific work on the three FIC characteristics, and found three regimes that are separated by the critical work (Wc) and the saturation work (Wsat) thresholds. Below the critical work threshold, the morphology is composed of mostly spherulite crystals, which keep a constant volume, and a small fraction of rice grain (anisotropic) crystals. The number of rice grain crystals increases with specific work, speeding up the crystallization time of the semicrystalline polymer. At critical work, spherulite formation stops, and the morphology consists only of rice grain structures. This morphology allows the sample to crystallize at higher temperatures when cooling at 5 C/min, with the sheared sample crystallizing at 129C compared to the unsheared sample at 113C. In addition, these rice grain structures can withstand significant annealing at elevated temperatures: for example, 2 days of annealing at 210C are required to fully erase these metastable nuclei. For Wc < W < Wsat, the rice grain number density increases with specific work, further strengthening the FIC effect. At the saturation work threshold, the rice grain size, crystallization time, crystallization temperature when cooling at 5 C/min, and nuclei persistence time reach saturation and remain constant for all W > Wsat. Similar to specific work, we find that the crystallization rate (i.e. nuclei… Advisors/Committee Members: Scott Thomas Milner, Dissertation Advisor/Co-Advisor, Ralph H Colby, Dissertation Advisor/Co-Advisor, Darrell Velegol, Committee Member, Enrique Daniel Gomez, Committee Member, John B Asbury, Committee Member.

Subjects/Keywords: flow-induced crystallization; quiescent crystallization; polypropylene; rheology; microscopy; differential scanning calorimetry

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APA (6^th Edition):

Hamad, F. G. (2015). Flow-induced Crystallization in Isotactic Polypropylene. (Thesis). Penn State University. Retrieved from https://submit-etda.libraries.psu.edu/catalog/27276

Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation

Chicago Manual of Style (16^th Edition):

Hamad, Fawzi Ghassan. “Flow-induced Crystallization in Isotactic Polypropylene.” 2015. Thesis, Penn State University. Accessed March 01, 2021. https://submit-etda.libraries.psu.edu/catalog/27276.

Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation

MLA Handbook (7^th Edition):

Hamad, Fawzi Ghassan. “Flow-induced Crystallization in Isotactic Polypropylene.” 2015. Web. 01 Mar 2021.

Vancouver:

Hamad FG. Flow-induced Crystallization in Isotactic Polypropylene. [Internet] [Thesis]. Penn State University; 2015. [cited 2021 Mar 01]. Available from: https://submit-etda.libraries.psu.edu/catalog/27276.

Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation

Council of Science Editors:

Hamad FG. Flow-induced Crystallization in Isotactic Polypropylene. [Thesis]. Penn State University; 2015. Available from: https://submit-etda.libraries.psu.edu/catalog/27276

Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation

University College London (University of London)

6. Hill, Vivienne Lucy. An investigation into the use of MTDSC as a technique for the characterisation of pharmaceutical materials.

Degree: PhD, 1999, University College London (University of London)

URL: https://discovery.ucl.ac.uk/id/eprint/10111202/ ; https://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.322735

► Modulated temperature differential scanning calorimetry (MTDSC) has been investigated as a technique for analysing pharmaceutical systems. Early studies have indicated that MTDSC may have advantages… (more)

▼ Modulated temperature differential scanning calorimetry (MTDSC) has been investigated as a technique for analysing pharmaceutical systems. Early studies have indicated that MTDSC may have advantages compared to conventional DSC and so the aim of this project is to assess both the potential and limitations of the technique for the analysis of samples of pharmaceutical interest. MTDSC uses a sinusoidally oscillating temperature programme and results in the measurement of a modulated heat flow signal. This signal can be used to determine the reversing and non-reversing nature of the heat flow response. However, the complex heating programme makes the quality of data obtained highly dependent on the choice of experimental parameters. Therefore, the investigation was begun by systematically investigating a number of experimental parameters to determine their effect on the distortion of the modulation, the accuracy of the heat capacity data and the outcome of the deconvolution process. This study was performed using spray dried lactose as a model pharmaceutical system and aluminium oxide as a heat capacity standard. The lactose study illustrated that MTDSC could deliver improved glass transitions measurements and so it was decided to further the investigation of the technique using a more complex amorphous pharmaceutical system. Poly(d,1- lactide) was chosen and was obtained in a high and low molecular weight form. Microspheres were manufactured using a solvent evaporation technique and then MTDSC was used to determine the effect of molecular weight on the glass transition temperature. Progesterone-loaded microspheres were also manufactured. MTDSC analysis showed that at low drug loadings the progesterone was present as a glass solution. At intermediate loadings, the drug was additionally present in an amorphous form that exhibited a glass transition and crystallisation on heating. MTDSC was able to detect this glass transition when it was not possible using DSC. At high loadings the drug was present as crystals.

Subjects/Keywords: 615.1; Differential scanning calorimetry; Temperature

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APA (6^th Edition):

Hill, V. L. (1999). An investigation into the use of MTDSC as a technique for the characterisation of pharmaceutical materials. (Doctoral Dissertation). University College London (University of London). Retrieved from https://discovery.ucl.ac.uk/id/eprint/10111202/ ; https://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.322735

Chicago Manual of Style (16^th Edition):

Hill, Vivienne Lucy. “An investigation into the use of MTDSC as a technique for the characterisation of pharmaceutical materials.” 1999. Doctoral Dissertation, University College London (University of London). Accessed March 01, 2021. https://discovery.ucl.ac.uk/id/eprint/10111202/ ; https://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.322735.

MLA Handbook (7^th Edition):

Hill, Vivienne Lucy. “An investigation into the use of MTDSC as a technique for the characterisation of pharmaceutical materials.” 1999. Web. 01 Mar 2021.

Vancouver:

Hill VL. An investigation into the use of MTDSC as a technique for the characterisation of pharmaceutical materials. [Internet] [Doctoral dissertation]. University College London (University of London); 1999. [cited 2021 Mar 01]. Available from: https://discovery.ucl.ac.uk/id/eprint/10111202/ ; https://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.322735.

Council of Science Editors:

Hill VL. An investigation into the use of MTDSC as a technique for the characterisation of pharmaceutical materials. [Doctoral Dissertation]. University College London (University of London); 1999. Available from: https://discovery.ucl.ac.uk/id/eprint/10111202/ ; https://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.322735

University of Arizona

7. Holeman, Teryn A. Effects of Three Cardiomyopathic-Causing Mutations (D230N, D84N, and E62Q) on the Structure and Flexibility of α-Tropomyosin .

Degree: 2017, University of Arizona

URL: http://hdl.handle.net/10150/624101

► Cardiac contraction at the level of the sarcomere is regulated by the thin filament (TF) composed of actin, alpha tropomyosin (TPM), and the troponin (Tn)… (more)

▼ Cardiac contraction at the level of the sarcomere is regulated by the thin filament (TF) composed of actin, alpha tropomyosin (TPM), and the troponin (Tn) complex (cTnT: cTnC: cTnI). The "gate-keeper" protein, α-TPM, is a highly conserved α-helical, coiled-coil dimer that spans actin and regulates myosin-actin interactions. The N-terminus of one α-TPM dimer inter-digitates with the C-terminus of the adjacent dimer in a head-to-tail fashion forming the flexible and cooperative TPM-overlap that is necessary for myofilament activation. Two dilated cardiomyopathy (DCM) causing mutations in TPM (D84N and D230N) and one hypertrophic cardiomyopathy (HCM) causing mutation (E62Q), all identified in large, unrelated, multigenerational families, were utilized to study how primary alterations in protein structure cause functional deficits. We hypothesize that structural changes from a single point mutation propagate along the -helical coiled-coil of TPM, thus affecting its regulatory function. Structural effects of the mutations studied via differential scanning calorimetry (DSC) on TPM alone revealed significant changes in the thermal unfolding temperatures of both the C- and N-termini for all mutants compared to WT, indicating that mutational effects propagate to both ends of TPM, thus affecting the overlap region. Although, of note, the proximal termini to the mutation has shown more significant structural changes compared to WT. DSC analysis on fully reconstituted TF’s (Tn:TPM:Actin) revealed effects on the TPM-Actin cooperativity of activation, affecting interaction strength (thermal stability), and the rigidity of TPM moving along actin (FWHM). To characterize the resultant functional effect of these discrete changes in thermal stability and TPM rigidity, ATPase assays were used to measure actomyosin activation in the presence and absence of Ca2+. Together, these data will provide a molecular level understanding of the structural and functional deficits caused by these mutations to help elucidate the mechanisms leading to disease. Advisors/Committee Members: Tardiff, Jil C (advisor), Tardiff, Jil C. (committeemember), Konhilas, John P. (committeemember), Granzier, Henk L. (committeemember).

Subjects/Keywords: Cardiomyopathy; Differential Scanning Calorimetry (DSC); Flexibility; Mutation; Tropomyosin

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APA (6^th Edition):

Holeman, T. A. (2017). Effects of Three Cardiomyopathic-Causing Mutations (D230N, D84N, and E62Q) on the Structure and Flexibility of α-Tropomyosin . (Masters Thesis). University of Arizona. Retrieved from http://hdl.handle.net/10150/624101

Chicago Manual of Style (16^th Edition):

Holeman, Teryn A. “Effects of Three Cardiomyopathic-Causing Mutations (D230N, D84N, and E62Q) on the Structure and Flexibility of α-Tropomyosin .” 2017. Masters Thesis, University of Arizona. Accessed March 01, 2021. http://hdl.handle.net/10150/624101.

MLA Handbook (7^th Edition):

Holeman, Teryn A. “Effects of Three Cardiomyopathic-Causing Mutations (D230N, D84N, and E62Q) on the Structure and Flexibility of α-Tropomyosin .” 2017. Web. 01 Mar 2021.

Vancouver:

Holeman TA. Effects of Three Cardiomyopathic-Causing Mutations (D230N, D84N, and E62Q) on the Structure and Flexibility of α-Tropomyosin . [Internet] [Masters thesis]. University of Arizona; 2017. [cited 2021 Mar 01]. Available from: http://hdl.handle.net/10150/624101.

Council of Science Editors:

Holeman TA. Effects of Three Cardiomyopathic-Causing Mutations (D230N, D84N, and E62Q) on the Structure and Flexibility of α-Tropomyosin . [Masters Thesis]. University of Arizona; 2017. Available from: http://hdl.handle.net/10150/624101

University of Southern California

8. Wang, Jiawei. Physical chemistry and polymeric modification of elastin-like polypeptides.

Degree: MS, Pharmaceutical Sciences, 2014, University of Southern California

URL: http://digitallibrary.usc.edu/cdm/compoundobject/collection/p15799coll3/id/406948/rec/5042

► Polymers are widely used in biomedical engineering. Among these, protein polymers like elastin‐like polypeptides (ELPs) have emerged with multiple novel applications. In this study, we… (more)

Subjects/Keywords: DCC polymerization; differential scanning calorimetry; elastin-like polypeptides

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APA (6^th Edition):

Wang, J. (2014). Physical chemistry and polymeric modification of elastin-like polypeptides. (Masters Thesis). University of Southern California. Retrieved from http://digitallibrary.usc.edu/cdm/compoundobject/collection/p15799coll3/id/406948/rec/5042

Chicago Manual of Style (16^th Edition):

Wang, Jiawei. “Physical chemistry and polymeric modification of elastin-like polypeptides.” 2014. Masters Thesis, University of Southern California. Accessed March 01, 2021. http://digitallibrary.usc.edu/cdm/compoundobject/collection/p15799coll3/id/406948/rec/5042.

MLA Handbook (7^th Edition):

Wang, Jiawei. “Physical chemistry and polymeric modification of elastin-like polypeptides.” 2014. Web. 01 Mar 2021.

Vancouver:

Wang J. Physical chemistry and polymeric modification of elastin-like polypeptides. [Internet] [Masters thesis]. University of Southern California; 2014. [cited 2021 Mar 01]. Available from: http://digitallibrary.usc.edu/cdm/compoundobject/collection/p15799coll3/id/406948/rec/5042.

Council of Science Editors:

Wang J. Physical chemistry and polymeric modification of elastin-like polypeptides. [Masters Thesis]. University of Southern California; 2014. Available from: http://digitallibrary.usc.edu/cdm/compoundobject/collection/p15799coll3/id/406948/rec/5042

University of Waterloo

9. Tadgell, Colin. Investigation of Plating Process Variability and Mechanism for Oxide Disruption in a Ni-Modified Fluxless Brazing Process for Aluminum Alloys.

Degree: 2015, University of Waterloo

URL: http://hdl.handle.net/10012/9072

► The effect of surface oxides and the presence of ternary constituents were examined using differential scanning calorimetry (DSC) along with SEM, EDX, and TEM studies… (more)

Subjects/Keywords: Aluminum Alloy; Brazing; Nickel; Thermal Analysis; Differential Scanning Calorimetry; Aluminum Oxide

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APA (6^th Edition):

Tadgell, C. (2015). Investigation of Plating Process Variability and Mechanism for Oxide Disruption in a Ni-Modified Fluxless Brazing Process for Aluminum Alloys. (Thesis). University of Waterloo. Retrieved from http://hdl.handle.net/10012/9072

Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation

Chicago Manual of Style (16^th Edition):

Tadgell, Colin. “Investigation of Plating Process Variability and Mechanism for Oxide Disruption in a Ni-Modified Fluxless Brazing Process for Aluminum Alloys.” 2015. Thesis, University of Waterloo. Accessed March 01, 2021. http://hdl.handle.net/10012/9072.

Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation

MLA Handbook (7^th Edition):

Tadgell, Colin. “Investigation of Plating Process Variability and Mechanism for Oxide Disruption in a Ni-Modified Fluxless Brazing Process for Aluminum Alloys.” 2015. Web. 01 Mar 2021.

Vancouver:

Tadgell C. Investigation of Plating Process Variability and Mechanism for Oxide Disruption in a Ni-Modified Fluxless Brazing Process for Aluminum Alloys. [Internet] [Thesis]. University of Waterloo; 2015. [cited 2021 Mar 01]. Available from: http://hdl.handle.net/10012/9072.

Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation

Council of Science Editors:

Tadgell C. Investigation of Plating Process Variability and Mechanism for Oxide Disruption in a Ni-Modified Fluxless Brazing Process for Aluminum Alloys. [Thesis]. University of Waterloo; 2015. Available from: http://hdl.handle.net/10012/9072

Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation

10. Dyriw, Michael. Differential Scanning Calorimetric (DSC) Study of New and Sterilized Nickel-Titanium Rotary Endodontic Instruments.

Degree: 2015, Marquette University

URL: https://epublications.marquette.edu/theses_open/307

► Introduction: Nickel-Titanium (NiTi) files have become popular in endodontic procedures compared to traditional stainless steel hand files owing to their increased flexibility which is especially… (more)

Subjects/Keywords: Differential Scanning Calorimetry; Endodontics; File; Dental Materials; Endodontics and Endodontology

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APA (6^th Edition):

Dyriw, M. (2015). Differential Scanning Calorimetric (DSC) Study of New and Sterilized Nickel-Titanium Rotary Endodontic Instruments. (Thesis). Marquette University. Retrieved from https://epublications.marquette.edu/theses_open/307

Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation

Chicago Manual of Style (16^th Edition):

Dyriw, Michael. “Differential Scanning Calorimetric (DSC) Study of New and Sterilized Nickel-Titanium Rotary Endodontic Instruments.” 2015. Thesis, Marquette University. Accessed March 01, 2021. https://epublications.marquette.edu/theses_open/307.

Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation

MLA Handbook (7^th Edition):

Dyriw, Michael. “Differential Scanning Calorimetric (DSC) Study of New and Sterilized Nickel-Titanium Rotary Endodontic Instruments.” 2015. Web. 01 Mar 2021.

Vancouver:

Dyriw M. Differential Scanning Calorimetric (DSC) Study of New and Sterilized Nickel-Titanium Rotary Endodontic Instruments. [Internet] [Thesis]. Marquette University; 2015. [cited 2021 Mar 01]. Available from: https://epublications.marquette.edu/theses_open/307.

Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation

Council of Science Editors:

Dyriw M. Differential Scanning Calorimetric (DSC) Study of New and Sterilized Nickel-Titanium Rotary Endodontic Instruments. [Thesis]. Marquette University; 2015. Available from: https://epublications.marquette.edu/theses_open/307

Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation

The Ohio State University

11. Lee, Jaesung. Calorimetric and microbiological evaluation of bacteria after exposure to food preservation treatments.

Degree: PhD, Food Science and Nutrition, 2004, The Ohio State University

URL: http://rave.ohiolink.edu/etdc/view?acc_num=osu1078597088

► Differential scanning calorimetry (DSC) was used to evaluate the effects of food preservation treatments on microorganisms based on the changes in thermal stability (Tm) of… (more)

▼ Differential scanning calorimetry (DSC) was used to evaluate the effects of food preservation treatments on microorganisms based on the changes in thermal stability (Tm) of the cellular components and the total apparent enthalpy. DSC analysis of Escherichia coli and Lactobacillus plantarum whole cells showed that E. coli is more heat resistant than L. plantarum. A linear relationship existed between the fractional viability calculated from calorimetric data and plate count data for both organisms. Based on this relationship, calorimetric data was used to develop a mathematical model to predict the number of survivors as a function of heat treatment under linearly increasing temperature. The inactivation parameters, D and z values, based on first order inactivation kinetic model were calculated using both calorimetric and plate count data for E. coli cells heat treated in the DSC. Evaluation of the effect of acids, ethanol or NaCl on E. coli showed that the apparent enthalpy decreased, mainly due to reduction of ribosomal subunit peak as ethanol and NaCl concentration increased and pH decreased. The lower survivability of chemically treated cells during subsequent heat treatment (at 60, 62.5 and 65 °C), indicates the conformational changes in cellular components by chemicals may have sensitized bacteria to heat. The decrease in total apparent enthalpy was also observed for E. coli cells treated at high hydrostatic pressure (HHP) above 200 MPa. The total enthalpy reduction was mainly due to the decrease in the peak area attributed to the denaturaion of ribosome. The DNA transition was also affected above 300 MPa treatments. The evaluation of the effect of HHP and nisin treatment on two Salmonella Enteritidis strains showed that while nisin alone treatment did not decrease the viability of cells, both bacterial cells were inactivated by pressure at 500 MPa. When nisin (Nisaplin) at 200 IU/ml concentration level was added to the culture broth prior to pressurization, cells from both bacterial strains were inactivated at 400 MPa. Advisors/Committee Members: Kaletunc, Gonul (Advisor).

Subjects/Keywords: Differential scanning calorimetry; microorganism; inactivation

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APA · Chicago · MLA · Vancouver · CSE | Export to Zotero / EndNote / Reference Manager

APA (6^th Edition):

Lee, J. (2004). Calorimetric and microbiological evaluation of bacteria after exposure to food preservation treatments. (Doctoral Dissertation). The Ohio State University. Retrieved from http://rave.ohiolink.edu/etdc/view?acc_num=osu1078597088

Chicago Manual of Style (16^th Edition):

Lee, Jaesung. “Calorimetric and microbiological evaluation of bacteria after exposure to food preservation treatments.” 2004. Doctoral Dissertation, The Ohio State University. Accessed March 01, 2021. http://rave.ohiolink.edu/etdc/view?acc_num=osu1078597088.

MLA Handbook (7^th Edition):

Lee, Jaesung. “Calorimetric and microbiological evaluation of bacteria after exposure to food preservation treatments.” 2004. Web. 01 Mar 2021.

Vancouver:

Lee J. Calorimetric and microbiological evaluation of bacteria after exposure to food preservation treatments. [Internet] [Doctoral dissertation]. The Ohio State University; 2004. [cited 2021 Mar 01]. Available from: http://rave.ohiolink.edu/etdc/view?acc_num=osu1078597088.

Council of Science Editors:

Lee J. Calorimetric and microbiological evaluation of bacteria after exposure to food preservation treatments. [Doctoral Dissertation]. The Ohio State University; 2004. Available from: http://rave.ohiolink.edu/etdc/view?acc_num=osu1078597088

12. Oliveira, Levi Ezequiel de. Análise térmica dos biodieseis obtidos por rota enzimática e suas respectivas matérias-primas.

Degree: Mestrado, Novos Materiais e Química Fina, 2010, University of São Paulo

URL: http://www.teses.usp.br/teses/disponiveis/97/97136/tde-03102012-121140/ ;

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A maior parte de toda a energia consumida no mundo provém do petróleo, carvão e gás natural (87% da matriz energética mundial). No entanto, essas… (more)

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A maior parte de toda a energia consumida no mundo provém do petróleo, carvão e gás natural (87% da matriz energética mundial). No entanto, essas fontes não renováveis possuem previsão de esgotamento em um futuro próximo. Além disso, são poluidores, afetando o meio ambiente, motivando a sociedade buscar fontes alternativas para mitigar esses problemas. O biodiesel, como alternativa de combustível, começou a ser estudado em 1937, e hoje mostra ser uma alternativa eficiente e não poluidora à utilização do diesel mineral. O estudo presente foi realizado com amostras de biodieseis obtidos utilizando catalisadores enzimáticos. Essa rota vem sendo investigada no país por diversos pesquisadores, e vem mostrando que o uso da enzima como catalisador minimiza os problemas relativos às etapas finais de purificação do biodiesel, pois reduz a ocorrência das reações indesejáveis de saponificação e permite uma simplificação e redução dos custos dos processos pela diminuição do número de operações associadas. Para ser um substituto, o biodiesel precisa se enquadrar em normas, no caso do Brasil, a resolução nº 42 da ANP (Agência Nacional de Petróleo, Gás Natural e Biocombustíveis) de 2004. Além disso, deve possuir qualidades que viabilize a sua substituição. Esse trabalho tem o objetivo de realizar o estudo térmico utilizando a Termogravimetria (TG) e a Calorimetria Exploratória Diferencial (DSC) dos biodieseis de babaçu, palma e sebo bovino obtidos pela rota enzimática e suas respectivas matérias-primas. Com os resultados da TG em atmosfera Inerte, foi possível analisar a volatilidade desses biodieseis, e também verificar o seu enquadramento no parâmetro de destilação da resolução nº 42 da ANP. A TG em atmosfera oxidativa possibilitou comparar esses biodieseis em relação às suas estabilidades termo-oxidativas. Também foram realizados o Estudo Cinético das curvas TG, visando o valor da energia de ativação das primeiras etapas de cada curva, utilizando o modelo matemático Ozawa. O estudo cinético das curvas TG em atmosfera de nitrogênio mostrou que a energia de ativação e a temperatura de inicio da degradação têm uma relação direta.

Most of all energy consumed worldwide comes from oil, coal and natural gas (87% of global energy production). However, these non-renewable resources are expected to exhaust in the near future. Moreover, they are polluters, affecting the environment, prompting the company to seek alternative sources to mitigate these problems. Biodiesel as alternative fuel, that began to be studied in 1937 and today has proved an efficient and non-polluting alternative to the use of mineral diesel. The present study was performed with babassu, palm and tallow biodiesel obtained using enzymatic catalysts. This route has been investigated by several researchers in the country, and has shown that the use of enzyme as catalyst minimizes the problems related to the final stages of purification of biodiesel, it reduces the occurrence of undesirable reactions of saponification and allows for simplification and cost reduction…

Advisors/Committee Members: Silva, Maria Lúcia Caetano Pinto da.

Subjects/Keywords: Biodiesel; Biodiesel; Calorimetria exploratória diferencial; Differential scanning calorimetry; Enzymatic route; Rota enzimática; Termogravimetria; Thermogravimetry

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APA · Chicago · MLA · Vancouver · CSE | Export to Zotero / EndNote / Reference Manager

APA (6^th Edition):

Oliveira, L. E. d. (2010). Análise térmica dos biodieseis obtidos por rota enzimática e suas respectivas matérias-primas. (Masters Thesis). University of São Paulo. Retrieved from http://www.teses.usp.br/teses/disponiveis/97/97136/tde-03102012-121140/ ;

Chicago Manual of Style (16^th Edition):

Oliveira, Levi Ezequiel de. “Análise térmica dos biodieseis obtidos por rota enzimática e suas respectivas matérias-primas.” 2010. Masters Thesis, University of São Paulo. Accessed March 01, 2021. http://www.teses.usp.br/teses/disponiveis/97/97136/tde-03102012-121140/ ;.

MLA Handbook (7^th Edition):

Oliveira, Levi Ezequiel de. “Análise térmica dos biodieseis obtidos por rota enzimática e suas respectivas matérias-primas.” 2010. Web. 01 Mar 2021.

Vancouver:

Oliveira LEd. Análise térmica dos biodieseis obtidos por rota enzimática e suas respectivas matérias-primas. [Internet] [Masters thesis]. University of São Paulo; 2010. [cited 2021 Mar 01]. Available from: http://www.teses.usp.br/teses/disponiveis/97/97136/tde-03102012-121140/ ;.

Council of Science Editors:

Oliveira LEd. Análise térmica dos biodieseis obtidos por rota enzimática e suas respectivas matérias-primas. [Masters Thesis]. University of São Paulo; 2010. Available from: http://www.teses.usp.br/teses/disponiveis/97/97136/tde-03102012-121140/ ;

University of Alberta

13. El-Thaher, Nayef. Conversion of Protein-Rich Waste Biomass into Value-Added Polymers.

Degree: PhD, Department of Chemical and Materials Engineering, 2013, University of Alberta

URL: https://era.library.ualberta.ca/files/sq87bw05h

► Conversion of protein-rich biomass waste into value-added industrial products via chemical cross-linking reactions was explored. Two types of cross-linking reagents were investigated: dialdehydes and epoxy… (more)

▼ Conversion of protein-rich biomass waste into value-added industrial products via chemical cross-linking reactions was explored. Two types of cross-linking reagents were investigated: dialdehydes and epoxy resins. Reaction chemistry was the main focus of this investigation and the main reaction parameters selected for study were electrolytes and protein molecular weight since raw material modification usually involves these two parameters. First, the reaction chemistry of glutaraldehyde was investigated. Glutaraldehyde is a cheap and highly reactive cross-linking reagent. Its reaction chemistry, however, is poorly understood. At low reaction temperatures, protein amine groups form Schiff bases with carbonyl groups of glutaraldehyde. The resulting C═N bond is weak and can be easily broken by heat or dissolution in water. As the reaction temperature is increased, the more stable C—N bond is formed. A network with low water solubility and significantly improved thermal stability is produced. The presence of water has a dual effect. Water acts as a medium to disperse hydrolyzed proteins into glutaraldehyde and is also a hydrogen source to drive the reaction forward. However, water is a byproduct. Its presence suppresses the reaction from the standpoint of thermodynamic equilibrium, and it must therefore be driven off. Epoxy-protein reaction chemistry was also investigated. The effects of salt, molecular weight and viscosity, and mass ratio on the apparent activation energy of the cross-linking reaction of epoxy resins and protein hydrolysate were studied by nonisothermal differential scanning calorimetry. The presence of salts contributed to an increase in the apparent activation energy. The curing of epoxy resins with lower molecular weight protein hydrolysates was found to have lower activation energy and order of reaction. An increase in the concentration of curing groups resulted in a small increase in the order of reaction. The activation energy of curing bisphenol A diglycidyl ether, with viscosity 500–700 cP, was found to be significantly higher than the curing activation energy of polypropylene glycol diglycidyl ether (viscosity ~50 cP). Denaturant addition was also investigated and was found to be an energetically efficient alternative to higher degrees of protein hydrolysis for subsequent reactions.

Subjects/Keywords: Sustainable Chemistry; Activation Energy; Glutaraldehyde; Reaction Kinetics; Polymers; Protein-rich Biomass; Differential Scanning Calorimetry

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APA · Chicago · MLA · Vancouver · CSE | Export to Zotero / EndNote / Reference Manager

APA (6^th Edition):

El-Thaher, N. (2013). Conversion of Protein-Rich Waste Biomass into Value-Added Polymers. (Doctoral Dissertation). University of Alberta. Retrieved from https://era.library.ualberta.ca/files/sq87bw05h

Chicago Manual of Style (16^th Edition):

El-Thaher, Nayef. “Conversion of Protein-Rich Waste Biomass into Value-Added Polymers.” 2013. Doctoral Dissertation, University of Alberta. Accessed March 01, 2021. https://era.library.ualberta.ca/files/sq87bw05h.

MLA Handbook (7^th Edition):

El-Thaher, Nayef. “Conversion of Protein-Rich Waste Biomass into Value-Added Polymers.” 2013. Web. 01 Mar 2021.

Vancouver:

El-Thaher N. Conversion of Protein-Rich Waste Biomass into Value-Added Polymers. [Internet] [Doctoral dissertation]. University of Alberta; 2013. [cited 2021 Mar 01]. Available from: https://era.library.ualberta.ca/files/sq87bw05h.

Council of Science Editors:

El-Thaher N. Conversion of Protein-Rich Waste Biomass into Value-Added Polymers. [Doctoral Dissertation]. University of Alberta; 2013. Available from: https://era.library.ualberta.ca/files/sq87bw05h

University of Louisville

14. Kendrick, Sarah. Functional data analysis methods for predicting disease status.

Degree: PhD, 2017, University of Louisville

URL: 10.18297/etd/2851 ; https://ir.library.louisville.edu/etd/2851

► Introduction: Differential scanning calorimetry (DSC) is used to determine thermally-induced conformational changes of biomolecules within a blood plasma sample. Recent research has indicated that… (more)

▼ Introduction: Differential scanning calorimetry (DSC) is used to determine thermally-induced conformational changes of biomolecules within a blood plasma sample. Recent research has indicated that DSC curves (or thermograms) may have different characteristics based on disease status and, thus, may be useful as a monitoring and diagnostic tool for some diseases. Since thermograms are curves measured over a range of temperature values, they are often considered as functional data. In this dissertation we propose and apply functional data analysis (FDA) techniques to analyze DSC data from the Lupus Family Registry and Repository (LFRR). The aim is to develop FDA methods to create models for classifying lupus vs. control patients on the basis of the thermogram curves. Methods: In project 1 we examine how well standard functional regression is able to capture the differences in curves for cases and controls and compare this to a multivariate approach. In project 2 we develop a semiparametric model; the Generalized Functional Partially Linear Single-Index Model (GFPL). This model is useful when there exists some curvature or non-linearity in the logit, which cannot be modeled by the standard Functional Generalized Linear Model (FGLM). It also mitigates the curse of dimensionality, is a more flexible model, and yields interpretable results. In project 3, we propose a tree-based method: Local Basis Random Forests (LBRF) for Functional Data. This non-parametric method allows us to focus on significant parts of the functional covariates and reduce the noise level. Results: The standard functional logistic regression model with FPCA scores as the predictors gives an 81.25% correct classification rate on the test data, comparable to results from the multivariate approach. The proposed GFPL gives prediction accuracies and standard errors that are better than the standard FGLM when there is nonlinearity present. The LBRF for functional data yields high prediction accuracy (as high as 97% in simulations and 92% in the Lupus data), especially when the true signal is localized, and is able to capture where the true signal lies. Advisors/Committee Members: Zheng, Qi, Brock, Guy, Kulasekera, K.B., Gaskins, Jeremy, Kong, Maiying, Garbett, Nichola.

Subjects/Keywords: functional data analysis; thermograms; lupus; differential scanning calorimetry; disease status; Bioinformatics; Biostatistics

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APA · Chicago · MLA · Vancouver · CSE | Export to Zotero / EndNote / Reference Manager

APA (6^th Edition):

Kendrick, S. (2017). Functional data analysis methods for predicting disease status. (Doctoral Dissertation). University of Louisville. Retrieved from 10.18297/etd/2851 ; https://ir.library.louisville.edu/etd/2851

Chicago Manual of Style (16^th Edition):

Kendrick, Sarah. “Functional data analysis methods for predicting disease status.” 2017. Doctoral Dissertation, University of Louisville. Accessed March 01, 2021. 10.18297/etd/2851 ; https://ir.library.louisville.edu/etd/2851.

MLA Handbook (7^th Edition):

Kendrick, Sarah. “Functional data analysis methods for predicting disease status.” 2017. Web. 01 Mar 2021.

Vancouver:

Kendrick S. Functional data analysis methods for predicting disease status. [Internet] [Doctoral dissertation]. University of Louisville; 2017. [cited 2021 Mar 01]. Available from: 10.18297/etd/2851 ; https://ir.library.louisville.edu/etd/2851.

Council of Science Editors:

Kendrick S. Functional data analysis methods for predicting disease status. [Doctoral Dissertation]. University of Louisville; 2017. Available from: 10.18297/etd/2851 ; https://ir.library.louisville.edu/etd/2851

Vanderbilt University

15. Harl, Robert Randall, Jr. Processing considerations for the combustion synthesis of yttrium aluminum garnet powders.

Degree: PhD, Chemical Engineering, 2013, Vanderbilt University

URL: http://hdl.handle.net/1803/15039

► Combustion synthesis leverages the exothermic reaction between a fuel and an oxidizer to provide the energy needed to form crystalline refractory oxides. In many cases… (more)

▼ Combustion synthesis leverages the exothermic reaction between a fuel and an oxidizer to provide the energy needed to form crystalline refractory oxides. In many cases combustion syntheses are less energy intensive and require fewer processing steps than traditional ceramic oxide processes. However, the properties of materials produced by combustion syntheses can depend on many processing parameters, such as the type of fuel used, the fuel to oxidizer ratio, coordinating characteristics of the fuel, the rate of heating the reactant solution. This work reports the results of process optimization and materials characterization studies of three ceramic oxides: yttrium aluminum garnet (YAG), lanthanum zirconate (LZO) and yttrium borate (YBO). Cerium and/or europium dopants were incorporated into these three host lattices to enhance their photoluminescent (PL) properties. The effects of process parameters on the crystallinity, composition, and PL emission intensity of the synthesized materials were investigated. We show that mixing urea and citric acid fuels decreases the PL intensity of YAG:Ce1% compared to using either pure urea or pure citric acid. Characterization of the material found that the material synthesized using only citric acid contained the most YAG phase and that the decrease in PL intensity is likely due to dopant segregation. We show that the heating rate used to raise the reactant solution to the ignition temperature also affected the crystallinity of the synthesized material. Thermogravimetric analysis and differential scanning calorimetry identified a heating rate that produced the maximum heat of combustion. Transmission electron micrographs of the synthesized material show that heating rates affect the morphology of the material. The YBO process optimization involved adding additional fuel and oxidizer to compensate for the lack of a boron-based oxidizer and included a post-synthesis anneal. The effect of proton irradiation on the PL of these materials was tested. The PL of YAG and LZO was not affected by a fluence of 1x10¹⁶ protons/cm², however the PL intensity of YBO decreased with doses of 1x10¹⁴ protons/cm² and above. Advisors/Committee Members: D. Greg Walker (committee member), Kenneth Debelak (committee member), M. Douglas LeVan (committee member), Bridget R. Rogers (Committee Chair).

Subjects/Keywords: YAG; TGA; thermogravimetric analysis; combustion synthesis; differential scanning calorimetry; photoluminescence; XRD; DSC; XPS

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APA · Chicago · MLA · Vancouver · CSE | Export to Zotero / EndNote / Reference Manager

APA (6^th Edition):

Harl, Robert Randall, J. (2013). Processing considerations for the combustion synthesis of yttrium aluminum garnet powders. (Doctoral Dissertation). Vanderbilt University. Retrieved from http://hdl.handle.net/1803/15039

Chicago Manual of Style (16^th Edition):

Harl, Robert Randall, Jr. “Processing considerations for the combustion synthesis of yttrium aluminum garnet powders.” 2013. Doctoral Dissertation, Vanderbilt University. Accessed March 01, 2021. http://hdl.handle.net/1803/15039.

MLA Handbook (7^th Edition):

Harl, Robert Randall, Jr. “Processing considerations for the combustion synthesis of yttrium aluminum garnet powders.” 2013. Web. 01 Mar 2021.

Vancouver:

Harl, Robert Randall J. Processing considerations for the combustion synthesis of yttrium aluminum garnet powders. [Internet] [Doctoral dissertation]. Vanderbilt University; 2013. [cited 2021 Mar 01]. Available from: http://hdl.handle.net/1803/15039.

Council of Science Editors:

Harl, Robert Randall J. Processing considerations for the combustion synthesis of yttrium aluminum garnet powders. [Doctoral Dissertation]. Vanderbilt University; 2013. Available from: http://hdl.handle.net/1803/15039

Universidade Nova

16. Carvalho, Tânia Isabel da Silva. Development of ion jelly thin films for electrochemical devices.

Degree: 2013, Universidade Nova

URL: http://www.rcaap.pt/detail.jsp?id=oai:run.unl.pt:10362/10874

►

Dissertação para obtenção do Grau de Doutor em Química Sustentável

Ionic liquids (ILs) are promising materials which have been used in a wide range of… (more)

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Dissertação para obtenção do Grau de Doutor em Química Sustentável

Ionic liquids (ILs) are promising materials which have been used in a wide range of applications. However, their major limitation is their physical state. In order to address this challenge, a self-supported IL-based material was developed by combining gelatine with an IL, originating a quasi-solid material named Ion Jelly (IJ). This is a light flexible material, dimensionally stable, with promising properties to develop safe and highly conductive electrolytes. This thesis is focused on the characterization of IJ films based on different ILs. The conductive mechanisms of IJ materials were studied using dielectric relaxation spectroscopy (DRS) in the frequency range 10-1−106 Hz. The study was complemented by differential scanning calorimetry (DSC) and pulsed field gradient nuclear magnetic resonance (PFG NMR) spectroscopy. A glass transition was detected by DSC for all materials allowing to classify them as glass formers. From dielectric measurements, transport properties such as mobility and diffusion coefficients were extracted. Moreover, it was found that the diffusion coefficients and mobility are similar for the IL and IJ, especially for the IL EMIMDCA. Since for BMIMDCA, those properties significantly change upon hydration, the influence of water content [0.4 - 30% (w/w)] was also studied for the ILs. In particular for BMPyrDCA with 30% water, it was analyzed the reorientational polarization by the complex permittivity and electric modulus, from which three different processes were identified: a secondary relaxation with Arrhenian temperature dependence, the process that is believed to be behind the dynamic glass transition and the mobility of charge carriers. An application of the IJs was successfully explored with a chemoresistive gas sensor made up by different IJs as active layer, which is an electronic nose formed by an array of such sensors. The performance of this e-nose revealed its ability to correctly detect eight common volatile solvents.

Advisors/Committee Members: Barreiros, Susana, Dionísio, Madalena, Vidinha, Pedro.

Subjects/Keywords: Ionic liquids; Ion jelly; Dielectric relaxation spectroscopy; Differential scanning calorimetry; PFG – nuclear magnetic resonance

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APA (6^th Edition):

Carvalho, T. I. d. S. (2013). Development of ion jelly thin films for electrochemical devices. (Thesis). Universidade Nova. Retrieved from http://www.rcaap.pt/detail.jsp?id=oai:run.unl.pt:10362/10874

Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation

Chicago Manual of Style (16^th Edition):

Carvalho, Tânia Isabel da Silva. “Development of ion jelly thin films for electrochemical devices.” 2013. Thesis, Universidade Nova. Accessed March 01, 2021. http://www.rcaap.pt/detail.jsp?id=oai:run.unl.pt:10362/10874.

Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation

MLA Handbook (7^th Edition):

Carvalho, Tânia Isabel da Silva. “Development of ion jelly thin films for electrochemical devices.” 2013. Web. 01 Mar 2021.

Vancouver:

Carvalho TIdS. Development of ion jelly thin films for electrochemical devices. [Internet] [Thesis]. Universidade Nova; 2013. [cited 2021 Mar 01]. Available from: http://www.rcaap.pt/detail.jsp?id=oai:run.unl.pt:10362/10874.

Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation

Council of Science Editors:

Carvalho TIdS. Development of ion jelly thin films for electrochemical devices. [Thesis]. Universidade Nova; 2013. Available from: http://www.rcaap.pt/detail.jsp?id=oai:run.unl.pt:10362/10874

Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation

University of Washington

17. Honaker, Matthew T. Conformational Heterogeneity and Catalytic Promiscuity in Glutathione Transferases.

Degree: PhD, 2013, University of Washington

URL: http://hdl.handle.net/1773/21993

► Enzymological paradigms have shifted recently to acknowledge the biological importance of catalytic promiscuity. Detoxification enzymes, such as glutathione transferases, are known to be highly promiscuous.… (more)

▼ Enzymological paradigms have shifted recently to acknowledge the biological importance of catalytic promiscuity. Detoxification enzymes, such as glutathione transferases, are known to be highly promiscuous. One common suggestion is that promiscuous enzymes are more conformationally heterogeneous than their substrate-specific counterparts. Here, a series of structurally similar glutathione transferase (GST) variants ranging from high specificity to high promiscuity are used as a platform for examining conformational heterogeneity as a putative mechanism for promiscuity. Quantitative promiscuity indices range from 0.72 for promiscuous GSTA1-1 to 0.05 for specific GSTA4-4, with intermediate values for each of the GST mutants. Fluorescence lifetime distribution analysis of Trp21 at the domain interface indicates a modest correlation of core protein dynamics with promiscuity. The mobility during the excited-state lifetime of Trp21 increases sharply for GSTA1-1. Differential scanning calorimetry (DSC) indicates a reversible low temperature transition for the promiscuous GSTA1-1 that is not observed with substrate specific GSTA4-4. This transition is assigned to rearrangement of the C-terminus at the active site of GSTA1-1 based on the effects of ligands and mutations. Near-UV and far-UV circular dichroism indicate that this transition is due to repacking of tertiary contacts with the remainder of the subunit, rather than `unfolding' of the C-terminus per se. Analysis of the DSC data using a modified Landau Theory indicates that the local conformational landscape of the active site of GSTA1-1 is smooth, with barrierless transitions between states. The partition function of the C-terminal states is a broad unimodal distribution at all temperatures within this DSC transition. Extraction and analysis of low temperature transitions for GSTA4-4 and the GST mutants with intermediate promiscuity using the same method indicates a correlation between the natural logarithm of partition function distribution widths with promiscuity, suggestive of an entropic basis for promiscuity. A similar trend in barrier heights differentiated barrierless GSTA1-1 from the less promiscuous GSTs, with free energy barriers increasing as promiscuity decreased. The correlation of conformational heterogeneity and level of promiscuity across the GST variants examined suggest a conformational selection mechanism for catalytic promiscuity. Advisors/Committee Members: Atkins, William M (advisor).

Subjects/Keywords: conformational heterogeneity; differential scanning calorimetry; glutathione transferase; GST; promiscuity; thermodynamics; Biophysics; Medicinal chemistry

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APA · Chicago · MLA · Vancouver · CSE | Export to Zotero / EndNote / Reference Manager

APA (6^th Edition):

Honaker, M. T. (2013). Conformational Heterogeneity and Catalytic Promiscuity in Glutathione Transferases. (Doctoral Dissertation). University of Washington. Retrieved from http://hdl.handle.net/1773/21993

Chicago Manual of Style (16^th Edition):

Honaker, Matthew T. “Conformational Heterogeneity and Catalytic Promiscuity in Glutathione Transferases.” 2013. Doctoral Dissertation, University of Washington. Accessed March 01, 2021. http://hdl.handle.net/1773/21993.

MLA Handbook (7^th Edition):

Honaker, Matthew T. “Conformational Heterogeneity and Catalytic Promiscuity in Glutathione Transferases.” 2013. Web. 01 Mar 2021.

Vancouver:

Honaker MT. Conformational Heterogeneity and Catalytic Promiscuity in Glutathione Transferases. [Internet] [Doctoral dissertation]. University of Washington; 2013. [cited 2021 Mar 01]. Available from: http://hdl.handle.net/1773/21993.

Council of Science Editors:

Honaker MT. Conformational Heterogeneity and Catalytic Promiscuity in Glutathione Transferases. [Doctoral Dissertation]. University of Washington; 2013. Available from: http://hdl.handle.net/1773/21993

University of Washington

18. McClary, Wynton Delfon. Interactions of Cytochrome P450 3A4 with Phospholipid Bilayer Nanodiscs.

Degree: PhD, 2016, University of Washington

URL: http://hdl.handle.net/1773/37192

► Cytochrome P450s (CYPs) are the major drug-metabolizing enzyme in humans. Cytochrome P450 3A4 (CYP3A4), in particular, is responsible for approximately half of all CYP-mediated drug… (more)

Subjects/Keywords: Cytochrome P450; Differential Scanning Calorimetry; Lipid; Membrane; Nanodisc; Stopped-Flow; Biophysics; Biochemistry; medicinal chemistry

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APA (6^th Edition):

McClary, W. D. (2016). Interactions of Cytochrome P450 3A4 with Phospholipid Bilayer Nanodiscs. (Doctoral Dissertation). University of Washington. Retrieved from http://hdl.handle.net/1773/37192

Chicago Manual of Style (16^th Edition):

McClary, Wynton Delfon. “Interactions of Cytochrome P450 3A4 with Phospholipid Bilayer Nanodiscs.” 2016. Doctoral Dissertation, University of Washington. Accessed March 01, 2021. http://hdl.handle.net/1773/37192.

MLA Handbook (7^th Edition):

McClary, Wynton Delfon. “Interactions of Cytochrome P450 3A4 with Phospholipid Bilayer Nanodiscs.” 2016. Web. 01 Mar 2021.

Vancouver:

McClary WD. Interactions of Cytochrome P450 3A4 with Phospholipid Bilayer Nanodiscs. [Internet] [Doctoral dissertation]. University of Washington; 2016. [cited 2021 Mar 01]. Available from: http://hdl.handle.net/1773/37192.

Council of Science Editors:

McClary WD. Interactions of Cytochrome P450 3A4 with Phospholipid Bilayer Nanodiscs. [Doctoral Dissertation]. University of Washington; 2016. Available from: http://hdl.handle.net/1773/37192

University of Illinois – Urbana-Champaign

19. Wang, Melissa. Thermal behavior characterization of a sugar-based model system and commercial confections across the stages of sugar cooking.

Degree: MS, Food Science & Human Nutrition, 2017, University of Illinois – Urbana-Champaign

URL: http://hdl.handle.net/2142/99479

► The stages of sugar cooking, although long-existing and widespread in the confection industry, are lacking in thermal behavior profile descriptions, which are crucial to confection… (more)

▼ The stages of sugar cooking, although long-existing and widespread in the confection industry, are lacking in thermal behavior profile descriptions, which are crucial to confection functionality. Thermal behavior parameters, such as the glass transition temperature (Tg), are indicative of confection material structure and textural behavior. Tg plays an important role in governing the quality and shelf life of sugar-based confection, and is influenced by moisture content, formulation, and other factors. This study aimed to connect thermal behavior parameters to the stages of sugar cooking. Thus, the objective of this research was to investigate the thermal behavior of the six stages of sugar cooking, as well as representative commercial confections from each stage. A model sugar-based confectionery system was developed and representative commercial confections belonging to each stage of sugar cooking were selected. The model system consisted of a 70:30 ratio of sucrose to corn syrup and a 70:30 ratio of solids to moisture. To investigate the thermal behavior of the stages of sugar cooking, differential scanning calorimetry (DSC), moisture content, and water activity analyses were conducted for the model system and representative commercial confections. The average Tg midpoint of the model system increased from thread to hard crack stage, corresponding to loss of water from increased cooking time and temperature. The Tg midpoint and moisture content of the model system had a near-linear relationship, with proportional changes between each stage, aside from a smaller change between soft ball and thread stage. However, this was not observed for the representative confections. The changes in average Tg midpoint and moisture content between stages were not proportional, and did not follow the order of the stages of sugar cooking. The average hard ball confection exhibited a higher moisture content and lower Tg than that of the average firm ball confection, despite firm ball confections having a lower cook temperature range than hard ball confections. The hard crack stage had the most similar thermal behavior between the model system and representative confections. These discrepancies between model system and representative confection thermal behaviors were primarily influenced by formulation and moisture content differences. Advisors/Committee Members: Schmidt, Shelly J (advisor).

Subjects/Keywords: Thermal behavior; Confections; Stages of sugar cooking; Differential scanning calorimetry; Glass transition temperature

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APA (6^th Edition):

Wang, M. (2017). Thermal behavior characterization of a sugar-based model system and commercial confections across the stages of sugar cooking. (Thesis). University of Illinois – Urbana-Champaign. Retrieved from http://hdl.handle.net/2142/99479

Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation

Chicago Manual of Style (16^th Edition):

Wang, Melissa. “Thermal behavior characterization of a sugar-based model system and commercial confections across the stages of sugar cooking.” 2017. Thesis, University of Illinois – Urbana-Champaign. Accessed March 01, 2021. http://hdl.handle.net/2142/99479.

Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation

MLA Handbook (7^th Edition):

Wang, Melissa. “Thermal behavior characterization of a sugar-based model system and commercial confections across the stages of sugar cooking.” 2017. Web. 01 Mar 2021.

Vancouver:

Wang M. Thermal behavior characterization of a sugar-based model system and commercial confections across the stages of sugar cooking. [Internet] [Thesis]. University of Illinois – Urbana-Champaign; 2017. [cited 2021 Mar 01]. Available from: http://hdl.handle.net/2142/99479.

Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation

Council of Science Editors:

Wang M. Thermal behavior characterization of a sugar-based model system and commercial confections across the stages of sugar cooking. [Thesis]. University of Illinois – Urbana-Champaign; 2017. Available from: http://hdl.handle.net/2142/99479

Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation

Brno University of Technology

20. Bohunská, Miroslava. Využití mikrokalorimetrických metod při studiu protektivních účinků chemických chaperonů: The use of microcalorimetric methods in the study of the protective effects of chemical chaperons.

Degree: 2019, Brno University of Technology

URL: http://hdl.handle.net/11012/173440

► This bachelor thesis deals with the study of protective substances against denaturation processes, called chemical chaperones. The theoretical part describes the general characteristics of proteins,… (more)

Subjects/Keywords: Protein; chemické chaperony; diferenční kompenzační kalorimetrie (DSC); Protein; chemical chaperones; differential scanning calorimetry (DSC)

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APA (6^th Edition):

Bohunská, M. (2019). Využití mikrokalorimetrických metod při studiu protektivních účinků chemických chaperonů: The use of microcalorimetric methods in the study of the protective effects of chemical chaperons. (Thesis). Brno University of Technology. Retrieved from http://hdl.handle.net/11012/173440

Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation

Chicago Manual of Style (16^th Edition):

Bohunská, Miroslava. “Využití mikrokalorimetrických metod při studiu protektivních účinků chemických chaperonů: The use of microcalorimetric methods in the study of the protective effects of chemical chaperons.” 2019. Thesis, Brno University of Technology. Accessed March 01, 2021. http://hdl.handle.net/11012/173440.

Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation

MLA Handbook (7^th Edition):

Bohunská, Miroslava. “Využití mikrokalorimetrických metod při studiu protektivních účinků chemických chaperonů: The use of microcalorimetric methods in the study of the protective effects of chemical chaperons.” 2019. Web. 01 Mar 2021.

Vancouver:

Bohunská M. Využití mikrokalorimetrických metod při studiu protektivních účinků chemických chaperonů: The use of microcalorimetric methods in the study of the protective effects of chemical chaperons. [Internet] [Thesis]. Brno University of Technology; 2019. [cited 2021 Mar 01]. Available from: http://hdl.handle.net/11012/173440.

Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation

Council of Science Editors:

Bohunská M. Využití mikrokalorimetrických metod při studiu protektivních účinků chemických chaperonů: The use of microcalorimetric methods in the study of the protective effects of chemical chaperons. [Thesis]. Brno University of Technology; 2019. Available from: http://hdl.handle.net/11012/173440

Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation

University of South Florida

21. Craft, Garrett Michael. Characterization of Nylon-12 in a Novel Additive Manufacturing Technology, and the Rheological and Spectroscopic Analysis of PEG-Starch Matrix Interactions.

Degree: 2018, University of South Florida

URL: https://scholarcommons.usf.edu/etd/7137

► In this work differential scanning calorimetry, dynamic mechanical analysis, Fourier-Transformed Infrared Spectroscopy [FT-IR] and polarized light microscopy will be employed to characterize polymeric systems. The… (more)

▼ In this work differential scanning calorimetry, dynamic mechanical analysis, Fourier-Transformed Infrared Spectroscopy [FT-IR] and polarized light microscopy will be employed to characterize polymeric systems. The first chapter broadly covers polymer synthesis and important characterization methods. In the second chapter, a polyamide (PA12) will be sintered via a novel additive manufacturing (AM) technology developed here at USF termed LAPS (Large Area Projection Sintering). LAPS uses extended sintering timespans to ensure complete melting and densification of the polymer powder over the entire two-dimensional area of the part’s footprint. Further, it allows for the printed layer to crystallize and shrink in its entirety as the temperature falls below the crystallization temperature prior to the next layer being added. The printed parts (termed coupons) will be assayed by DSC and polarized light microscopy to determine sintering efficacy. Additionally, the parts will be compared to coupons printed with conventional methods to show that the USF AM technology shows superior elongation at break (EaB), with comparable ultimate tensile strength (UTS) and Young’s Modulus to laser sintered coupons. This is notable as conventional AM methods produce parts which usually compromise between EaB and modulus. The EaB of LAPS-printed parts is comparable to injection molding (IM) grade PA12, which is remarkable as IM grade PA12 powder normally has higher molecular weight and limited crystallinity. The reduced crystallinity of IM grade PA12 parts is thought to be due to the high shear rates during injection and fast cooling rates post-fabrication. Further, the USF LAPS parts show minimal or no detectable porosity. Porosity is an artifact of the sintering process which conventional techniques like laser sintering (LS) have little ability to mitigate, as higher energy wattages simply burn and degrade the polymer surface with insufficient time available for heat transfer and bulk melt flow. Porosity is documented as one of the leading causes of part failure and decreased mechanical properties in the literature, and as such the USF AM technology is in the process of being patented as of March, 2018. Chapters three through six will explore a phenomenon first noticed by clinicians at the James A. Haley Veterans Hospital. They observed that starch-thickened drinks for patients suffering from dysphagia became dangerously thinned down upon addition of the osmotic drug polyethylene glycol (PEG) 3350, marketed as Miralax®. Starch-based hydrocolloids are common thickeners used for patients with dysphagia, and so any incompatibility with such a ubiquitous drug as PEG 3350 poses an immediate danger. Patients with the disorder can suffer increased rates of aspiration-related pneumonia, incurring up to nearly a 60% fatality rate within a year. Chances for aspiration greatly increase for food items which are too inviscid to safely swallow. Rheology and FT-IR spectroscopy will be used to show that the breakdown of the starch network in aqueous…

Subjects/Keywords: Differential Scanning Calorimetry; Dynamic Mechanical Analysis; Rheology; Spectroscopy; Three-Dimensional Printing; Polymer Chemistry

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APA (6^th Edition):

Craft, G. M. (2018). Characterization of Nylon-12 in a Novel Additive Manufacturing Technology, and the Rheological and Spectroscopic Analysis of PEG-Starch Matrix Interactions. (Thesis). University of South Florida. Retrieved from https://scholarcommons.usf.edu/etd/7137

Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation

Chicago Manual of Style (16^th Edition):

Craft, Garrett Michael. “Characterization of Nylon-12 in a Novel Additive Manufacturing Technology, and the Rheological and Spectroscopic Analysis of PEG-Starch Matrix Interactions.” 2018. Thesis, University of South Florida. Accessed March 01, 2021. https://scholarcommons.usf.edu/etd/7137.

Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation

MLA Handbook (7^th Edition):

Craft, Garrett Michael. “Characterization of Nylon-12 in a Novel Additive Manufacturing Technology, and the Rheological and Spectroscopic Analysis of PEG-Starch Matrix Interactions.” 2018. Web. 01 Mar 2021.

Vancouver:

Craft GM. Characterization of Nylon-12 in a Novel Additive Manufacturing Technology, and the Rheological and Spectroscopic Analysis of PEG-Starch Matrix Interactions. [Internet] [Thesis]. University of South Florida; 2018. [cited 2021 Mar 01]. Available from: https://scholarcommons.usf.edu/etd/7137.

Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation

Council of Science Editors:

Craft GM. Characterization of Nylon-12 in a Novel Additive Manufacturing Technology, and the Rheological and Spectroscopic Analysis of PEG-Starch Matrix Interactions. [Thesis]. University of South Florida; 2018. Available from: https://scholarcommons.usf.edu/etd/7137

Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation

The Ohio State University

22. Lans, Alexa Michelle. Evaluation of Water Sorption and Thermal Properties of Galacto-oligosaccharides, and Application in Glassy Confections.

Degree: MS, Food Science and Technology, 2016, The Ohio State University

URL: http://rave.ohiolink.edu/etdc/view?acc_num=osu1460764786

► Galacto-oligosaccharides (GOS) are non-digestible food ingredients that have been shown to increase populations of health-promoting species of gut bacteria. A variety of GOS products can… (more)

▼ Galacto-oligosaccharides (GOS) are non-digestible food ingredients that have been shown to increase populations of health-promoting species of gut bacteria. A variety of GOS products can be produced, resulting in versatile ingredients with different GOS purity levels. Application of these GOS products in the U.S is currently limited, and few studies have investigated the effect of the addition of GOS on physiochemical properties of foods. The overall hypothesis of this study was that GOS purity will affect water sorption and thermal properties, causing differences in critical processing and storage conditions and appropriate food applications. The first objective of this study was to investigate the effect of purity of GOS mixtures on water sorption and thermal behavior of the products. A secondary objective was to develop glassy confections (hard-candies) using GOS and study the resulting physiochemical and sensory properties. Water was found to plasticize GOS, decreasing the glass transition temperature (Tg) as measured by differential scanning calorimetry, which caused the caking of powders and collapse of the amorphous structure. Water demonstrated a stronger plasticizing effect on a 55% GOS mixture than on a 90% GOS mixture. Thermogravimetric analysis was also used to show changes in the distribution of water in the GOS structure as products increased in moisture at increasing relative humidity. The derivative change in weight demonstrated that water becomes more homogenous and difficult to remove as the Tg of GOS falls below storage temperature. From this study, the 55% GOS product was selected for the development of glassy confections as a replacement for corn syrup, at levels of 25% of the final confection. Additionally, a glassy confection comprised completely of the GOS ingredient was developed for use in future clinical trials related to its potential prebiotic effect. Hardness, stickiness and Tg of GOS confections did not differ from a control. Confections developed with GOS were shown to potentially have higher stability (less recrystallization of sucrose) than control confections when exposed to high relative humidity environments. Whole, freeze-dried black raspberries were also used as flavoring agents in confections with acceptable physical properties of Tg, hardness and stickiness. Sensory evaluation showed that no detectable differences were observed when GOS was used to replace corn syrup in glassy confections of various flavors. These studies show the importance of considering purity levels of GOS when establishing critical storage and processing parameters of the ingredient, as well when developing or selecting a GOS product for a specific food application. Furthermore, these studies demonstrate the potential to successfully develop glassy confections to deliver the 55% GOS ingredient at levels of 25 and 100% of the final confection. Long-term stability studies and further optimization may take place to prepare these confections for use in commercial settings and as study agents in future… Advisors/Committee Members: Vodovotz, Yael (Advisor).

Subjects/Keywords: Food Science; galacto-oligosaccharides, prebiotics, glass transition, differential scanning calorimetry, thermogravimetric analysis, functional confections

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APA (6^th Edition):

Lans, A. M. (2016). Evaluation of Water Sorption and Thermal Properties of Galacto-oligosaccharides, and Application in Glassy Confections. (Masters Thesis). The Ohio State University. Retrieved from http://rave.ohiolink.edu/etdc/view?acc_num=osu1460764786

Chicago Manual of Style (16^th Edition):

Lans, Alexa Michelle. “Evaluation of Water Sorption and Thermal Properties of Galacto-oligosaccharides, and Application in Glassy Confections.” 2016. Masters Thesis, The Ohio State University. Accessed March 01, 2021. http://rave.ohiolink.edu/etdc/view?acc_num=osu1460764786.

MLA Handbook (7^th Edition):

Lans, Alexa Michelle. “Evaluation of Water Sorption and Thermal Properties of Galacto-oligosaccharides, and Application in Glassy Confections.” 2016. Web. 01 Mar 2021.

Vancouver:

Lans AM. Evaluation of Water Sorption and Thermal Properties of Galacto-oligosaccharides, and Application in Glassy Confections. [Internet] [Masters thesis]. The Ohio State University; 2016. [cited 2021 Mar 01]. Available from: http://rave.ohiolink.edu/etdc/view?acc_num=osu1460764786.

Council of Science Editors:

Lans AM. Evaluation of Water Sorption and Thermal Properties of Galacto-oligosaccharides, and Application in Glassy Confections. [Masters Thesis]. The Ohio State University; 2016. Available from: http://rave.ohiolink.edu/etdc/view?acc_num=osu1460764786

King Abdullah University of Science and Technology

23. Altaher, Maryam. Synthesis and Characterization of Novel Polymethylene-Based 3-Miktoarm Star Copolymers by Combining Polyhomologation with Other Living Polymerizations.

Degree: Physical Science and Engineering (PSE) Division, 2015, King Abdullah University of Science and Technology

URL: http://hdl.handle.net/10754/556240

► Polyethylene (PE) is produced in a huge scale globally and has plenty of desirable properties. It is used in coating, packaging, and artificial joint replacements.… (more)

Subjects/Keywords: polyhomologation; Polyethylene; star polymers; size exclusion chromatography; differential scanning calorimetry; Nuclear magnetic resonance

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APA (6^th Edition):

Altaher, M. (2015). Synthesis and Characterization of Novel Polymethylene-Based 3-Miktoarm Star Copolymers by Combining Polyhomologation with Other Living Polymerizations. (Thesis). King Abdullah University of Science and Technology. Retrieved from http://hdl.handle.net/10754/556240

Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation

Chicago Manual of Style (16^th Edition):

Altaher, Maryam. “Synthesis and Characterization of Novel Polymethylene-Based 3-Miktoarm Star Copolymers by Combining Polyhomologation with Other Living Polymerizations.” 2015. Thesis, King Abdullah University of Science and Technology. Accessed March 01, 2021. http://hdl.handle.net/10754/556240.

Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation

MLA Handbook (7^th Edition):

Altaher, Maryam. “Synthesis and Characterization of Novel Polymethylene-Based 3-Miktoarm Star Copolymers by Combining Polyhomologation with Other Living Polymerizations.” 2015. Web. 01 Mar 2021.

Vancouver:

Altaher M. Synthesis and Characterization of Novel Polymethylene-Based 3-Miktoarm Star Copolymers by Combining Polyhomologation with Other Living Polymerizations. [Internet] [Thesis]. King Abdullah University of Science and Technology; 2015. [cited 2021 Mar 01]. Available from: http://hdl.handle.net/10754/556240.

Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation

Council of Science Editors:

Altaher M. Synthesis and Characterization of Novel Polymethylene-Based 3-Miktoarm Star Copolymers by Combining Polyhomologation with Other Living Polymerizations. [Thesis]. King Abdullah University of Science and Technology; 2015. Available from: http://hdl.handle.net/10754/556240

Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation

Addis Ababa University

24. ANTENEH, ASSEFA. PHYSICOCHEMICAL CHARACTERIZATION OF PLECTRANTHUS EDULIS (ETHIOPIAN POTATO) STARCH AND ITS EVALUATION AS A DISINTEGRANT IN PARACETAMOL TABLET FORMULATIONS .

Degree: 2015, Addis Ababa University

URL: http://etd.aau.edu.et/dspace/handle/123456789/6883

► Plectranthus edulis, Vatke (P. edulis) [fam., Lamiaceae], is an ancient Ethiopian tuber crop and one of the traditional root crops indigenous to Ethiopia. It is… (more)

▼ Plectranthus edulis, Vatke (P. edulis) [fam., Lamiaceae], is an ancient Ethiopian tuber crop and one of the traditional root crops indigenous to Ethiopia. It is a large (~1m high) and an erect herbaceous plant with hirsute, decumbent and glandular stems, and leaves of lanceolate to elliptic and root of swollen nodes which produces edible underground potato-like tubers. Starch from the tubers of P. edulis was isolated using 0.075% (w/v) sodium metabisulphite and it gave a yield of about 80.4% on dry weight basis. The starch was examined for the chemical composition, amylose content, physicochemical properties and evaluated for its applicability as a pharmaceutical disintegrant in tablet formulations. The proximate composition of the starch on dry weight basis was found to be 0.14% ash, 0.21% lipid, 0.43% protein, and 99.22% starch. The amylose content was 30.6%. Its true density, moisture content and pH values were 1.47 g/ml, 11.2% and 6.6, respectively. Scanning electron microscopy (SEM) of the starch granules showed characteristic morphology that was oblong (elliptical) with some oval in shapes. The starch showed a monomodal normal granule size distribution with a mean particle size of 36.2 μm and specific surface area of 0.302 m2/g. The DSC thermograms of P. edulis starch exhibited higher T0 (69.2 °C), Tp (74.3 °C) and Te (83.3 °C) values than potato starch. X-Ray Diffraction pattern of the starch was typical B-type with a distinctive maximum peak at 17.5o 2θ. The FTIR spectral features of the starches show characteristic peaks at 3325, 2930, 1462, 1377, 1155, 860 cm-1 attributed to various stretching and bending vibrations of O–H, C–H, C–O, or C–O–C bonds for starches. It has typical swelling power, solubility and moisture sorption pattern at different conditions of temp and relative humidities. It possesses higher values relative to potato starch, but its solubility values are lower than potato starch at all temp studied. The comparative disintegrant abilities of these starches in paracetamol tablet formulations prepared by wet granulation method were studied. The granules prepared with the starches (P. edulis starch and potato starch) at different disintegrant concentrations were characterized for particle size distribution and flow properties. The excellent flow property of the granules was manifested by the weight uniformity of tablets. The crushing strength, friability, disintegration time, and dissolution rate of the tablets were studied using standard methods. The results II indicated that the properties of paracetamol tablets formulated with both starches as disintegrants were affected by their concentration and the compression force (CF). Increasing the concentration of the starches reduced the crushing strength and disintegration time of the tablets and increased the percent friability of the tablets. Conversely, increasing the CF increased crushing strength and disintegration time of the tablets and reduced the percent friability of tablets. The results have shown that… Advisors/Committee Members: Tsige Gebre-Mariam(Prof.) (advisor).

Subjects/Keywords: Plectranthus edulis; Starch; Differential scanning calorimetry; Scanning electron microscopy; X-ray diffraction; Tablet disintegrant; Optimization; Central Composite Design

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APA (6^th Edition):

ANTENEH, A. (2015). PHYSICOCHEMICAL CHARACTERIZATION OF PLECTRANTHUS EDULIS (ETHIOPIAN POTATO) STARCH AND ITS EVALUATION AS A DISINTEGRANT IN PARACETAMOL TABLET FORMULATIONS . (Thesis). Addis Ababa University. Retrieved from http://etd.aau.edu.et/dspace/handle/123456789/6883

Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation

Chicago Manual of Style (16^th Edition):

ANTENEH, ASSEFA. “PHYSICOCHEMICAL CHARACTERIZATION OF PLECTRANTHUS EDULIS (ETHIOPIAN POTATO) STARCH AND ITS EVALUATION AS A DISINTEGRANT IN PARACETAMOL TABLET FORMULATIONS .” 2015. Thesis, Addis Ababa University. Accessed March 01, 2021. http://etd.aau.edu.et/dspace/handle/123456789/6883.

Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation

MLA Handbook (7^th Edition):

ANTENEH, ASSEFA. “PHYSICOCHEMICAL CHARACTERIZATION OF PLECTRANTHUS EDULIS (ETHIOPIAN POTATO) STARCH AND ITS EVALUATION AS A DISINTEGRANT IN PARACETAMOL TABLET FORMULATIONS .” 2015. Web. 01 Mar 2021.

Vancouver:

ANTENEH A. PHYSICOCHEMICAL CHARACTERIZATION OF PLECTRANTHUS EDULIS (ETHIOPIAN POTATO) STARCH AND ITS EVALUATION AS A DISINTEGRANT IN PARACETAMOL TABLET FORMULATIONS . [Internet] [Thesis]. Addis Ababa University; 2015. [cited 2021 Mar 01]. Available from: http://etd.aau.edu.et/dspace/handle/123456789/6883.

Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation

Council of Science Editors:

ANTENEH A. PHYSICOCHEMICAL CHARACTERIZATION OF PLECTRANTHUS EDULIS (ETHIOPIAN POTATO) STARCH AND ITS EVALUATION AS A DISINTEGRANT IN PARACETAMOL TABLET FORMULATIONS . [Thesis]. Addis Ababa University; 2015. Available from: http://etd.aau.edu.et/dspace/handle/123456789/6883

Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation

University of Cambridge

25. Meylan, Carolina Maria. Thermomechanical Processing of Metallic Glasses.

Degree: PhD, 2019, University of Cambridge

URL: https://www.repository.cam.ac.uk/handle/1810/298061

► Depending on its thermal and kinetic history, a metallic glass (MG) of a given composition can show a wide range of energetic states. One central… (more)

▼ Depending on its thermal and kinetic history, a metallic glass (MG) of a given composition can show a wide range of energetic states. One central parameter determining the initial state of a glass is the cooling rate used to form it upon quenching from the melt. A faster cooling rate will give rise to a glass of higher energy with a more disordered structure. The energy, structure and properties of a glass can also be modified after glass formation. Through various thermomechanical methods, it is possible to bring the glass either to a more relaxed, ordered state of lower energy – this process is called relaxation – or to a more unrelaxed, disordered state of higher energy, a process called rejuvenation. In the present work, the effects of several thermomechanical processing methods were explored on the properties of various MG samples. One well-known method to rejuvenate MGs is by introducing damage through plastic deformation. Here, an infrequently used approach to reach large plastic strains was tested, in which brittle fracture was avoided by deforming samples with a low aspect ratio through uniaxial compression. In this manner, large plastic strains of up to 85% were achieved in La-based MG rods, which led to an average energy increase of ≈670 J/mol, determined by ultra-fast differential scanning calorimetry (FDSC). But for this MG, room temperature (RT) is a relatively high fraction of the glass-transition temperature Tg; thus RT storage led to significant ageing and the deformation-induced energy was found to relax away with time. Another method studied here was thermal cycling (TC), which is a novel technique to rejuvenate MGs and consists of introducing non-affine thermal strains by cycling between cryogenic and room temperatures. TC was applied to three MG compositions and different aspects were investigated. From elastic bending experiments on a La-based MG ribbon, TC was observed to accelerate the relaxation of anelastic strain. Nanoindentation measurements on a CuZr-based MG plate showed that TC decreased the yield stress, but barely affected the hardness or modulus. Finally, TC was also applied to a Fe-based MG; but for this composition, around 100 cycles were necessary to observe a significant effect, whereas only 5‒10 cycles were needed to affect the other two compositions. But for all three compositions, TC was found to target mainly the individual flow units of the MG without affecting much the global structure. While rejuvenation of MGs is often desired with the aim of improving plasticity, relaxation also has advantages, e.g. it increases thermal stability and hardness. Annealing is the common method for relaxation, but may pose the risk of inducing crystallization. Therefore, there is an interest in relaxing MGs through other means. The application of loading cycles in the elastic regime has been reported to relax MGs. Elastic cycling (EC) by nanoindentation was tested here on a CuZr-based MG and compared directly to annealing. Although EC indeed increased the yield strength of the sample, its…

Subjects/Keywords: metallic glasses; relaxation; rejuvenation; nanoindentation; differential scanning calorimetry; heat treatment; mechanical treatment; elastic cycling; thermal cycling; annealing; plastic deformation; ultra-fast scanning calorimetry

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APA · Chicago · MLA · Vancouver · CSE | Export to Zotero / EndNote / Reference Manager

APA (6^th Edition):

Meylan, C. M. (2019). Thermomechanical Processing of Metallic Glasses. (Doctoral Dissertation). University of Cambridge. Retrieved from https://www.repository.cam.ac.uk/handle/1810/298061

Chicago Manual of Style (16^th Edition):

Meylan, Carolina Maria. “Thermomechanical Processing of Metallic Glasses.” 2019. Doctoral Dissertation, University of Cambridge. Accessed March 01, 2021. https://www.repository.cam.ac.uk/handle/1810/298061.

MLA Handbook (7^th Edition):

Meylan, Carolina Maria. “Thermomechanical Processing of Metallic Glasses.” 2019. Web. 01 Mar 2021.

Vancouver:

Meylan CM. Thermomechanical Processing of Metallic Glasses. [Internet] [Doctoral dissertation]. University of Cambridge; 2019. [cited 2021 Mar 01]. Available from: https://www.repository.cam.ac.uk/handle/1810/298061.

Council of Science Editors:

Meylan CM. Thermomechanical Processing of Metallic Glasses. [Doctoral Dissertation]. University of Cambridge; 2019. Available from: https://www.repository.cam.ac.uk/handle/1810/298061

University of Cambridge

26. Meylan, Carolina Maria. Thermomechanical processing of metallic glasses.

Degree: PhD, 2019, University of Cambridge

URL: https://doi.org/10.17863/CAM.45116 ; https://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.792971

► Depending on its thermal and kinetic history, a metallic glass (MG) of a given composition can show a wide range of energetic states. One central… (more)

▼ Depending on its thermal and kinetic history, a metallic glass (MG) of a given composition can show a wide range of energetic states. One central parameter determining the initial state of a glass is the cooling rate used to form it upon quenching from the melt. A faster cooling rate will give rise to a glass of higher energy with a more disordered structure. The energy, structure and properties of a glass can also be modified after glass formation. Through various thermomechanical methods, it is possible to bring the glass either to a more relaxed, ordered state of lower energy - this process is called relaxation - or to a more unrelaxed, disordered state of higher energy, a process called rejuvenation. In the present work, the effects of several thermomechanical processing methods were explored on the properties of various MG samples. One well-known method to rejuvenate MGs is by introducing damage through plastic deformation. Here, an infrequently used approach to reach large plastic strains was tested, in which brittle fracture was avoided by deforming samples with a low aspect ratio through uniaxial compression. In this manner, large plastic strains of up to 85% were achieved in La-based MG rods, which led to an average energy increase of ≈670 J/mol, determined by ultra-fast differential scanning calorimetry (FDSC). But for this MG, room temperature (RT) is a relatively high fraction of the glass-transition temperature Tg; thus RT storage led to significant ageing and the deformation-induced energy was found to relax away with time. Another method studied here was thermal cycling (TC), which is a novel technique to rejuvenate MGs and consists of introducing non-affine thermal strains by cycling between cryogenic and room temperatures. TC was applied to three MG compositions and different aspects were investigated. From elastic bending experiments on a La-based MG ribbon, TC was observed to accelerate the relaxation of anelastic strain. Nanoindentation measurements on a CuZr-based MG plate showed that TC decreased the yield stress, but barely affected the hardness or modulus. Finally, TC was also applied to a Fe-based MG; but for this composition, around 100 cycles were necessary to observe a significant effect, whereas only 5‒10 cycles were needed to affect the other two compositions. But for all three compositions, TC was found to target mainly the individual flow units of the MG without affecting much the global structure. While rejuvenation of MGs is often desired with the aim of improving plasticity, relaxation also has advantages, e.g. it increases thermal stability and hardness. Annealing is the common method for relaxation, but may pose the risk of inducing crystallization. Therefore, there is an interest in relaxing MGs through other means. The application of loading cycles in the elastic regime has been reported to relax MGs. Elastic cycling (EC) by nanoindentation was tested here on a CuZr-based MG and compared directly to annealing. Although EC indeed increased the yield strength of the sample, its…

Subjects/Keywords: metallic glasses; relaxation; rejuvenation; nanoindentation; differential scanning calorimetry; heat treatment; mechanical treatment; elastic cycling; thermal cycling; annealing; plastic deformation; ultra-fast scanning calorimetry

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APA · Chicago · MLA · Vancouver · CSE | Export to Zotero / EndNote / Reference Manager

APA (6^th Edition):

Meylan, C. M. (2019). Thermomechanical processing of metallic glasses. (Doctoral Dissertation). University of Cambridge. Retrieved from https://doi.org/10.17863/CAM.45116 ; https://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.792971

Chicago Manual of Style (16^th Edition):

Meylan, Carolina Maria. “Thermomechanical processing of metallic glasses.” 2019. Doctoral Dissertation, University of Cambridge. Accessed March 01, 2021. https://doi.org/10.17863/CAM.45116 ; https://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.792971.

MLA Handbook (7^th Edition):

Meylan, Carolina Maria. “Thermomechanical processing of metallic glasses.” 2019. Web. 01 Mar 2021.

Vancouver:

Meylan CM. Thermomechanical processing of metallic glasses. [Internet] [Doctoral dissertation]. University of Cambridge; 2019. [cited 2021 Mar 01]. Available from: https://doi.org/10.17863/CAM.45116 ; https://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.792971.

Council of Science Editors:

Meylan CM. Thermomechanical processing of metallic glasses. [Doctoral Dissertation]. University of Cambridge; 2019. Available from: https://doi.org/10.17863/CAM.45116 ; https://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.792971

University of Illinois – Urbana-Champaign

27. Lee, Joo Won. Investigation of thermal decomposition as the cause of the loss of crystalline structure in sucrose, glucose, and fructose.

Degree: PhD, 0037, 2010, University of Illinois – Urbana-Champaign

URL: http://hdl.handle.net/2142/15570

► Simple sugars (e.g., sucrose, glucose, and fructose) are abundantly used as basic ingredients in the food industry and as excipients in the pharmaceutical industry, due… (more)

▼ Simple sugars (e.g., sucrose, glucose, and fructose) are abundantly used as basic ingredients in the food industry and as excipients in the pharmaceutical industry, due to the quality attributes they contribute to the final products, such as sweet taste, flavor, texture, color, shelf-life (e.g., flavor retention via encapsulation), and carrier function of active pharmaceutical components. These quality attributes directly depend on the processing protocol employed, in particular heating conditions, as well as the type(s) of sugar used. Thus, it is important to accurately and completely characterize the sugars prior to use in specific applications. Melting has been commonly used for sugar characterization because it is an easy and quick property to measure, yet is usually repeatable and robust. In general, melting is determined by heating a sugar at a specified scanning rate using a thermal analytical technique, such as Differential Scanning Calorimetry. The sugar loses its crystalline structure (commonly termed melting) by adsorbing heat energy, which yields the critical parameters of the resultant melting peak, i.e., the onset melting temperature (Tm onset), the peak melting temperature (Tm peak), and the enthalpy of melting (???H). These parameters provide a good deal of information for sugar identification and characterization (e.g., purity, type, size, etc.) purposes. However, the reported melting temperatures for sugars vary widely. This variation has been attributed to a number of causes, such as differences in melting temperature determination methods, origin, impurity, polymorphs, superheating, liquefaction, and thermal decomposition and/or mutarotation in addition to melting. However, a complete explanation of the substantial variation observed in the sugar melting temperatures as a function of heating rates is not currently found in the literature. Of importance to note is that from a thermodynamic viewpoint, the heating rate dependency of the sugar melting temperatures suggests that the sugars do not experience thermodynamic melting. Because thermodynamic melting occurs at a single, time independent temperature with a constant enthalpy value (??H), where the crystalline solid and corresponding liquid phases are in thermodynamic equilibrium (???G=0) at a constant pressure, the melting parameters for the sugars cannot be used for identification purpose. Therefore, the ultimate objective of this research was to elucidate the fundamental mechanism underlying the loss of crystalline structure (melting) in these sugars. With thermal and chemical analytical approaches, this research found that the kinetic process of thermal decomposition was responsible for the loss of crystalline structure in these sugars, leading to heating rate dependency in their melting parameters. This result distinguishes thermodynamic melting from the loss of crystalline structure caused by thermal decomposition (termed ???apparent melting??? in this research), which solves the controversy that currently exists in the literature… Advisors/Committee Members: Schmidt, Shelly J. (advisor), Cadwallader, Keith R. (Committee Chair), Schmidt, Shelly J. (committee member), Feng, Hao (committee member), Engeseth, Nicki J. (committee member), Thomas, Leonard C. (committee member).

Subjects/Keywords: Thermodynamic melting; thermal decomposition; apparent melting; sucrose; glucose; fructose; Differential Scanning Calorimetry; Modulated Differential Scanning Calorimetry; Thermogravimetric analysis; Rapid-scanning DSC

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APA · Chicago · MLA · Vancouver · CSE | Export to Zotero / EndNote / Reference Manager

APA (6^th Edition):

Lee, J. W. (2010). Investigation of thermal decomposition as the cause of the loss of crystalline structure in sucrose, glucose, and fructose. (Doctoral Dissertation). University of Illinois – Urbana-Champaign. Retrieved from http://hdl.handle.net/2142/15570

Chicago Manual of Style (16^th Edition):

Lee, Joo Won. “Investigation of thermal decomposition as the cause of the loss of crystalline structure in sucrose, glucose, and fructose.” 2010. Doctoral Dissertation, University of Illinois – Urbana-Champaign. Accessed March 01, 2021. http://hdl.handle.net/2142/15570.

MLA Handbook (7^th Edition):

Lee, Joo Won. “Investigation of thermal decomposition as the cause of the loss of crystalline structure in sucrose, glucose, and fructose.” 2010. Web. 01 Mar 2021.

Vancouver:

Lee JW. Investigation of thermal decomposition as the cause of the loss of crystalline structure in sucrose, glucose, and fructose. [Internet] [Doctoral dissertation]. University of Illinois – Urbana-Champaign; 2010. [cited 2021 Mar 01]. Available from: http://hdl.handle.net/2142/15570.

Council of Science Editors:

Lee JW. Investigation of thermal decomposition as the cause of the loss of crystalline structure in sucrose, glucose, and fructose. [Doctoral Dissertation]. University of Illinois – Urbana-Champaign; 2010. Available from: http://hdl.handle.net/2142/15570

University of Pretoria

28. [No author]. Photoinitiated cyanoacrylates for fast underwater bonding .

Degree: 2011, University of Pretoria

URL: http://upetd.up.ac.za/thesis/available/etd-10212009-181354/

► Strong underwater bonds between polycarbonate sheet and various other substrates were achieved using ethyl 2-cyanoacrylate gel cured with an anionic photoinitiator (dibenzoylferrocene). The gel reacts… (more)

▼ Strong underwater bonds between polycarbonate sheet and various other substrates were achieved using ethyl 2-cyanoacrylate gel cured with an anionic photoinitiator (dibenzoylferrocene). The gel reacts quickly with water on contact and forms a protective polyethyl cyanoacrylate (PECA) skin. This provides a diffusion barrier that protects the inner monomer from further reaction with or polymerisation by water (hydroxide ions). The PECA skin is, however, permeable to water and the inner monomer slowly reacts as water diffuses through the PECA skin. The application procedure for this adhesive is critical because of the fast reaction with water. The adhesive should be applied at the centre of the bond area in such a way as to cover the smallest exposed surface area and that it should not be spread out over the entire surface area. The PECA skin will rupture when the substrates are pressed together, exposing unreacted monomer to the fresh new surface between the two substrates. The adhesive displaces water as it propagates towards the joint edges. In this way it is able to form a strong underwater bond. Without a photoinitiator, ethyl cyanoacrylate adhesives will form strong bonds to smooth underwater surfaces. The addition of a photoinitiator (dibenzoylferrocene), however, increases the rate at which the bond strength develops. Photo differential scanning calorimetric (photo-DSC) analysis was used to determine the optimum photoinitiator concentration. A concentration of between 0.3% (m/m) and 0.1% (m/m) was found to be optimum for adhesive films between 0.5 and 1.2 mm thick. Epoxy-based underwater adhesives have the disadvantage that the cure rate is very slow at low water temperatures. In contrast, the current system features a negative temperature dependence. Therefore, the curing rate is faster at lower water temperatures, making it highly suitable for very cold environmental conditions. The underwater bonding properties of cyanoacrylate adhesive were measured on a wide range of metallic and non-metallic materials. Bond strengths ranged from 1 to 5 MPa respectively. Bond strength (0.2 mm film thickness) develops in a very short time (less than a minute) using a 5 mW/cm2 blue LED light source as trigger for the photo initiator. Water temperatures between 1.5 and 40 °C did not influence the ultimate bond strength achieved following 50 seconds of illumination. The reduction in bond strength due to the ethyl cyanoacrylates reacting with water was measured in artificial sea water and potable water. A 20% reduction in bond strength was found after 10 minutes of water exposure. The underwater bond should therefore be made as soon as possible following exposure to water. Bond ageing studies on both steel and polycarbonate showed an initial decrease in bond strength (during the first 50 hours); thereafter the bond strength stabilises. Advisors/Committee Members: Prof W W Focke (advisor).

Subjects/Keywords: Ethyl cyanoacrylates; Dibenzoylferrocene; Photoinitiator; Underwater bonding; Photo differential scanning calorimetry; Polycarbonate; Bond ageing; Underwater application; Shear bond strength; Illumination; UCTD

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APA · Chicago · MLA · Vancouver · CSE | Export to Zotero / EndNote / Reference Manager

APA (6^th Edition):

author], [. (2011). Photoinitiated cyanoacrylates for fast underwater bonding . (Masters Thesis). University of Pretoria. Retrieved from http://upetd.up.ac.za/thesis/available/etd-10212009-181354/

Chicago Manual of Style (16^th Edition):

author], [No. “Photoinitiated cyanoacrylates for fast underwater bonding .” 2011. Masters Thesis, University of Pretoria. Accessed March 01, 2021. http://upetd.up.ac.za/thesis/available/etd-10212009-181354/.

MLA Handbook (7^th Edition):

author], [No. “Photoinitiated cyanoacrylates for fast underwater bonding .” 2011. Web. 01 Mar 2021.

Vancouver:

author] [. Photoinitiated cyanoacrylates for fast underwater bonding . [Internet] [Masters thesis]. University of Pretoria; 2011. [cited 2021 Mar 01]. Available from: http://upetd.up.ac.za/thesis/available/etd-10212009-181354/.

Council of Science Editors:

author] [. Photoinitiated cyanoacrylates for fast underwater bonding . [Masters Thesis]. University of Pretoria; 2011. Available from: http://upetd.up.ac.za/thesis/available/etd-10212009-181354/

University of California – Berkeley

29. Dursch, Thomas James. Ice-Crystallization Kinetics during Fuel-Cell Cold-Start.

Degree: Chemical Engineering, 2014, University of California – Berkeley

URL: http://www.escholarship.org/uc/item/22q9363x

► Proton-exchange-membrane fuel cells (PEMFCs) show promise in automotive applications because of their high efficiency, high power density, and potentially low emissions. To be successful in… (more)

▼ Proton-exchange-membrane fuel cells (PEMFCs) show promise in automotive applications because of their high efficiency, high power density, and potentially low emissions. To be successful in automobiles, PEMFCs must permit rapid startup with minimal energy from subfreezing temperatures, known as cold-start. In a PEMFC, reduction of oxygen to water occurs in the cathode catalyst layer (CL). Under subfreezing conditions, water generated during startup solidifies and hinders access of gaseous oxygen to the catalytic sites in the cathode CL, severely inhibiting cell performance and potentially causing cell failure. Achieving cold-start is difficult in practice, due to potential flooding, sluggish reaction kinetics, durability loss, and rapid ice crystallization. Currently, however, few studies focus on the fundamentals of ice crystallization during cold-start. Elucidation of the mechanisms and kinetics of ice formation within PEMFC porous media is, therefore, critical to successful cell startup and high performance at low temperatures. First, an experimental method is presented for obtaining isothermal ice-crystallization kinetics in water-saturated gas-diffusion layers (GDLs). Ice formation is initially studied in the GDL because this layer retains a significant amount of product water during cold-start. Isothermal ice-crystallization and ice-nucleation rates are obtained in commercial Toray GDLs as functions of subcooling using differential scanning calorimetry (DSC). A nonlinear ice-crystallization rate expression is developed using Johnson-Mehl-Avrami-Kolmogorov (JMAK) theory, in which the heat-transfer-limited growth rate is determined from the moving-boundary Stefan problem. Predicted ice-crystallization rates are in excellent agreement with experiment. A validated rate expression is thus available for predicting ice-crystallization kinetics in GDLs. Ice-crystallization kinetics is also considered under experimental settings similar to real PEMFC operating conditions where ice invariably forms non-isothermally. Non-isothermal ice-crystallization rates and ice-crystallization temperatures are obtained in water-saturated GDLs as a function of cooling rate. Our previously developed ice-crystallization rate expression is extended to non-isothermal crystallization to predict ice-crystallization kinetics at various cooling rates. For non-isothermal ice formation, we find that cooling rate has a negligible effect on the crystallization rate when crystallization times are much faster than the time to decrease the sample temperature by the subcooling. Therefore, a pseudo-isothermal method is proposed for non-isothermal crystallization kinetics using isothermal crystallization kinetics evaluated at the non-isothermal crystallization temperature. Catalyst layers also retain a significant amount of product water during cold-start. Accordingly, ice nucleation and growth in PEMFC CLs are investigated using isothermal DSC and compared to isothermal galvanostatic membrane-electrode assembly (MEA) cold-starts. Measured…

Subjects/Keywords: Physical chemistry; Materials Science; Catalyst Layer; Cold-Start; Differential Scanning Calorimetry; Fuel Cell; Gas-Diffusion Layer; Ice Nucleation

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APA · Chicago · MLA · Vancouver · CSE | Export to Zotero / EndNote / Reference Manager

APA (6^th Edition):

Dursch, T. J. (2014). Ice-Crystallization Kinetics during Fuel-Cell Cold-Start. (Thesis). University of California – Berkeley. Retrieved from http://www.escholarship.org/uc/item/22q9363x

Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation

Chicago Manual of Style (16^th Edition):

Dursch, Thomas James. “Ice-Crystallization Kinetics during Fuel-Cell Cold-Start.” 2014. Thesis, University of California – Berkeley. Accessed March 01, 2021. http://www.escholarship.org/uc/item/22q9363x.

Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation

MLA Handbook (7^th Edition):

Dursch, Thomas James. “Ice-Crystallization Kinetics during Fuel-Cell Cold-Start.” 2014. Web. 01 Mar 2021.

Vancouver:

Dursch TJ. Ice-Crystallization Kinetics during Fuel-Cell Cold-Start. [Internet] [Thesis]. University of California – Berkeley; 2014. [cited 2021 Mar 01]. Available from: http://www.escholarship.org/uc/item/22q9363x.

Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation

Council of Science Editors:

Dursch TJ. Ice-Crystallization Kinetics during Fuel-Cell Cold-Start. [Thesis]. University of California – Berkeley; 2014. Available from: http://www.escholarship.org/uc/item/22q9363x

Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation

30. Denari, Gabriela Bueno. Contribuições ao ensino de análise térmica.

Degree: Mestrado, Química Analítica e Inorgânica, 2013, University of São Paulo

URL: http://www.teses.usp.br/teses/disponiveis/75/75135/tde-04042013-151955/ ;

►

Considerando a importância crescente das técnicas termoanalíticas na indústria e na pesquisa contemporânea, torna-se necessário apresentá-las de forma adequada aos alunos de cursos de graduação,… (more)

▼

Considerando a importância crescente das técnicas termoanalíticas na indústria e na pesquisa contemporânea, torna-se necessário apresentá-las de forma adequada aos alunos de cursos de graduação, não apenas de química, mas de ciência dos materiais, física, farmácia, das diversas modalidades de engenharia, entre outros. Por outro lado, pode-se notar que isso raramente acontece, por diversos motivos, como falta de equipamentos, falta de experimentos demonstrativos das técnicas e até mesmo de falta de preparo dos docentes, com relação ao conhecimento dos fundamentos das técnicas e normalização de nomenclatura. No sentido de contribuir com o ensino de Análise Térmica em nosso país, este trabalho teve por objetivo buscar informações históricas e compilar e/ou desenvolver experimentos didáticos que possam ser usados na demonstração de conceitos teóricos e aspectos práticos das técnicas termoanalíticas mais usadas no Brasil, como a Termogravimetria (TGA), Termogravimetria Derivada (DTG), Análise Térmica Diferencial (DTA) e Calorimetria Exploratória Diferencial (DSC). Para avaliar o efeito didático do material desenvolvido foi proposto um curso extracurricular no tema Análise Térmica, chamado \"Princípios e Aplicações de Análise Térmica\", em nível de graduação na forma de curso de Difusão Cultural, apoiado pela Pró-Reitoria de Cultura e Extensão da Universidade de São Paulo (USP). Participaram 12 alunos de graduação e 3 alunos de pós-graduação, estes últimos como ouvintes. Os participantes receberam material didático escrito, na forma de uma apostila, instruções teóricas e aulas práticas, envolvendo experimentos com problemas práticos contextualizados, em Análise Térmica. A avaliação do curso foi feita com base em questionários sobre expectativas dos alunos em relação ao curso, seus conhecimentos prévios e aqueles obtidos ao final do curso. Os questionários foram aplicados antes e após as atividades. A avaliação de conteúdo foi feita usando questões sobre o tópico abordado e revelou significativo ganho de conhecimento desses alunos em relação às técnicas termoanalíticas. Assim, atingiu-se o esperado, contribuindo de alguma maneira para o ensino de Análise Térmica e sua aplicação nos cursos de graduação, envolvendo Termogravimetria, Termogravimetria Derivada, Análise Térmica Diferencial e Calorimetria Exploratória Diferencial.

Considering the increasing relevance of the thermoanalytical techniques in both industry and contemporary research, it becomes interesting to present such techniques in a proper way to undergraduate students, not only in chemistry, but also in materials science, physics, pharmacy, the several areas of engineering, and other potential users of these techniques. Moreover it can be noted that this rarely happens due to many reasons such as unavailability of equipments, to demonstrate the experimental details and even lacking in knowledge of professors regarding the fundamentals of the techniques and standardization in nomenclature. In order to contribute to the Thermal Analysis education in Brazil, this…

Advisors/Committee Members: Cavalheiro, Eder Tadeu Gomes.

Subjects/Keywords: calorimetria exploratória diferencial; differential scanning calorimetry; história da análise térmica; history of thermal analysis; termogravimetria; thermogravimetry

Record Details Similar Records Cite « Share

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APA · Chicago · MLA · Vancouver · CSE | Export to Zotero / EndNote / Reference Manager

APA (6^th Edition):

Denari, G. B. (2013). Contribuições ao ensino de análise térmica. (Masters Thesis). University of São Paulo. Retrieved from http://www.teses.usp.br/teses/disponiveis/75/75135/tde-04042013-151955/ ;

Chicago Manual of Style (16^th Edition):

Denari, Gabriela Bueno. “Contribuições ao ensino de análise térmica.” 2013. Masters Thesis, University of São Paulo. Accessed March 01, 2021. http://www.teses.usp.br/teses/disponiveis/75/75135/tde-04042013-151955/ ;.

MLA Handbook (7^th Edition):

Denari, Gabriela Bueno. “Contribuições ao ensino de análise térmica.” 2013. Web. 01 Mar 2021.

Vancouver:

Denari GB. Contribuições ao ensino de análise térmica. [Internet] [Masters thesis]. University of São Paulo; 2013. [cited 2021 Mar 01]. Available from: http://www.teses.usp.br/teses/disponiveis/75/75135/tde-04042013-151955/ ;.

Council of Science Editors:

Denari GB. Contribuições ao ensino de análise térmica. [Masters Thesis]. University of São Paulo; 2013. Available from: http://www.teses.usp.br/teses/disponiveis/75/75135/tde-04042013-151955/ ;

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