subject:(surfactant)

University of Debrecen

1. Hőss, Károly. Surfactant biológiája és farmakológiai befolyásolhatósága .

Degree: DE – Általános Orvostudományi Kar, University of Debrecen

a surfactant anyagok összetétele, funkcióik a szervezeten belül és hatásaik a légzésben és egyéb folyamatokban. Advisors/Committee Members: Pórszász, Róbert (advisor), Debreceni Egyetem::Általános Orvostudományi Kar::Farmakológiai és Farmakoterápiai Intézet (advisor).

Subjects/Keywords: surfactant

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APA (6^th Edition):

Hőss, K. (n.d.). Surfactant biológiája és farmakológiai befolyásolhatósága . (Thesis). University of Debrecen. Retrieved from http://hdl.handle.net/2437/226339

Note: this citation may be lacking information needed for this citation format:
No year of publication.
Not specified: Masters Thesis or Doctoral Dissertation

Chicago Manual of Style (16^th Edition):

Hőss, Károly. “Surfactant biológiája és farmakológiai befolyásolhatósága .” Thesis, University of Debrecen. Accessed February 19, 2020. http://hdl.handle.net/2437/226339.

Note: this citation may be lacking information needed for this citation format:
No year of publication.
Not specified: Masters Thesis or Doctoral Dissertation

MLA Handbook (7^th Edition):

Hőss, Károly. “Surfactant biológiája és farmakológiai befolyásolhatósága .” Web. 19 Feb 2020.

Note: this citation may be lacking information needed for this citation format:
No year of publication.

Vancouver:

Hőss K. Surfactant biológiája és farmakológiai befolyásolhatósága . [Internet] [Thesis]. University of Debrecen; [cited 2020 Feb 19]. Available from: http://hdl.handle.net/2437/226339.

Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation
No year of publication.

Council of Science Editors:

Hőss K. Surfactant biológiája és farmakológiai befolyásolhatósága . [Thesis]. University of Debrecen; Available from: http://hdl.handle.net/2437/226339

Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation
No year of publication.

University of Edinburgh

2. Reissig, Louisa. Equilibrium and nonequilibrium behaviour of surfactant systems.

Degree: PhD, 2010, University of Edinburgh

URL: http://hdl.handle.net/1842/4221

► In binary systems, surfactant molecules can self-assemble into a large variety of structures depending on their chemical structure, concentration and temperature. The properties and stability… (more)

▼ In binary systems, surfactant molecules can self-assemble into a large variety of structures depending on their chemical structure, concentration and temperature. The properties and stability of the phases, their coexistence regions and the formation of metastable structures is of great importance not only for fundamental understanding, but also for applications in many fields including industry and medicine. This thesis presents studies of the equilibrium and non-equilibrium behaviour of two widely used surfactant systems. The understanding of the equilibrium behaviour of an aqueous surfactant system is often incomplete or partly incorrect, which is caused by experimental difficulties, long equilibration times and the occurrence of long-lived metastable states. By applying a set of complementary techniques and recording changes on different length scales, the equilibrium phase diagram of the surfactant didodecyldimethylammonium bromide (DDAB) in water has been studied and amended. Differential scanning calorimetry has been used to obtain thermodynamic parameters. The structure of phases and biphasic regions have been characterised by small angle X-ray scattering and microscopy, while the conformational properties of the surfactant molecules have been investigated using Raman spectroscopy combined with computational methods. The effects of impurities have been studied using analytical techniques and a sufficient purity of the samples could be ensured. As a result of the studies, a new crystalline phase which exists at temperatures below 16°C was found. This phase replaces the frozen lamellar phase (Lβ) in the previously reported phase diagram. The Lβ phase has been found to be a long-lived metastable phase. The amended phase diagram has been tested by studying phase transitions along isoplethal and isothermal paths. All experimental results could be explained in terms of the new phase diagram. The study of phase transition along isoplethal paths focused on the transition between the new crystalline phase (XWn) coexisting with a dilute monomer solution (W) and the lamellar phase (Lα). This transition was (except for a single composition DDAB≈3% DDAB) a non-isothermal transition involving the phase sequence: XWn +W → XWn + Lα → Lα upon heating and Lα → overcooled Lα → XWn +W upon cooling. The structural changes within the phases and their relative ratios could be characterised using small angle X-ray scattering, microscopy and Raman spectroscopy. During the dissolution of lamellar phases along an isothermal path, multilamellar wormlike interface instabilities (so called myelins) were found to grow from the lamellar/water interface into the water. The growth of these myelins as well as changes in the lamellar phase have been investigated using optical microscopy and direct observation. This has provided detailed quantitative information on the dynamics of myelin growth and the effect of the initial structure of the lamellar phase on the myelin growth. The dependence of the growing rate on surfactant concentration could…

Subjects/Keywords: 541.36; surfactant molecules; aqueous surfactant system; myelin

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APA (6^th Edition):

Reissig, L. (2010). Equilibrium and nonequilibrium behaviour of surfactant systems. (Doctoral Dissertation). University of Edinburgh. Retrieved from http://hdl.handle.net/1842/4221

Chicago Manual of Style (16^th Edition):

Reissig, Louisa. “Equilibrium and nonequilibrium behaviour of surfactant systems.” 2010. Doctoral Dissertation, University of Edinburgh. Accessed February 19, 2020. http://hdl.handle.net/1842/4221.

MLA Handbook (7^th Edition):

Reissig, Louisa. “Equilibrium and nonequilibrium behaviour of surfactant systems.” 2010. Web. 19 Feb 2020.

Vancouver:

Reissig L. Equilibrium and nonequilibrium behaviour of surfactant systems. [Internet] [Doctoral dissertation]. University of Edinburgh; 2010. [cited 2020 Feb 19]. Available from: http://hdl.handle.net/1842/4221.

Council of Science Editors:

Reissig L. Equilibrium and nonequilibrium behaviour of surfactant systems. [Doctoral Dissertation]. University of Edinburgh; 2010. Available from: http://hdl.handle.net/1842/4221

University of Hong Kong

3. Chan, Shing-fung. The role of surfactant protein B in influenza virus infection.

Degree: M. Phil., 2015, University of Hong Kong

URL: http://hdl.handle.net/10722/227934

► Influenza virus is the most common virus causing respiratory tract infection leading to hospitalization and death. Severe illness is more common in young children, elderly,… (more)

▼ Influenza virus is the most common virus causing respiratory tract infection leading to hospitalization and death. Severe illness is more common in young children, elderly, pregnant women, and individuals with obesity or underlying diseases. However, many patients with severe influenza do not have any of these risk factors. Pulmonary surfactant is important in maintaining alveolar stability. In addition, surfactant protein A (SP-A) and surfactant protein D (SP-D) are known to inhibit influenza virus replication. Genetic polymorphisms of surfactant protein genes have been associated with respiratory tract infections. The objective of this study is to find out whether surfactant protein is important in the clinical severity of influenza virus infection. Firstly, genetic polymorphisms in the surfactant protein genes were compared between severe and mild cases of influenza A (H1N1)pdm09 and A(H3N2) infection. Secondly, antiviral effect of surfactant protein B (SP-B) was investigated. Twelve single nucleotide polymorphisms (SNPs)of surfactant protein genes were compared between influenza A patients suffering from severe and mild illness. In the first cohort of 42 severe and 42 mild cases of A(H1N1)pdm09 infection, a significant association was found between the C allele of SNP rs1130866 (located in the surfactant protein B gene SFTPB)with severe infection (odds ratio [OR] =3.37, p = 0.0048). In the second cohort of 296 patients, both univariate and multivariate analyses confirmed C/C genotype of rs1130866 to be an independent risk factor for severe A(H1N1)pdm09 infection (OR=2.087, p = 0.023). Moreover, C/C genotype was overrepresented in hospitalized A(H1N1)pdm09 patients when compared to the general Han Chinese population (OR=3.232, p = 0.00000056). On the other hand, there was no significant association between rs1130866 genotype and disease severity of A(H3N2) infection, but the C/C genotype was significantly overrepresented in hospitalized A(H3N2) patients when compared with the general Han Chinese population (OR=1.521, p = 0.020). Collectively, our findings suggested that the SFTPB polymorphism rs1130866-C was associated with severe influenza. Sincers1130866 is a functional SNP affecting the secretion and maturation of SP-B, individuals with SFTPB polymorphism rs1130866-C may have less mature SP-B secreted into alveolar surface. Therefore, we hypothesized that SP-B is an antiviral peptide and low levels of SP-Bin the alveoli of individuals with rs1130866-C may predispose them to severe influenza. Virus yield reduction assay and plaque reduction assay showed that SP-B inhibited viral replication of A(H1N1)pdm09 and A(H7N9). Time-of-addition assay showed that the inhibition of viral replication did not occur when SP-B was added 3 hours after virus inoculation. Immunofluorescence assay showed that viral nucleoprotein expression at 6 hours after virus inoculation was inhibited by SP-B. Therefore, SP-B could inhibit viral replication, and the inhibition likely occurred during the early stages of viral lifecycle. …

Subjects/Keywords: Pulmonary surfactant; Influenza

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APA (6^th Edition):

Chan, S. (2015). The role of surfactant protein B in influenza virus infection. (Masters Thesis). University of Hong Kong. Retrieved from http://hdl.handle.net/10722/227934

Chicago Manual of Style (16^th Edition):

Chan, Shing-fung. “The role of surfactant protein B in influenza virus infection.” 2015. Masters Thesis, University of Hong Kong. Accessed February 19, 2020. http://hdl.handle.net/10722/227934.

MLA Handbook (7^th Edition):

Chan, Shing-fung. “The role of surfactant protein B in influenza virus infection.” 2015. Web. 19 Feb 2020.

Vancouver:

Chan S. The role of surfactant protein B in influenza virus infection. [Internet] [Masters thesis]. University of Hong Kong; 2015. [cited 2020 Feb 19]. Available from: http://hdl.handle.net/10722/227934.

Council of Science Editors:

Chan S. The role of surfactant protein B in influenza virus infection. [Masters Thesis]. University of Hong Kong; 2015. Available from: http://hdl.handle.net/10722/227934

University of Minnesota

4. Calixto Mancipe, Natalia. Design and Production of High-Performance Hydrophobin Surfactant Proteins Using a Dual-Domain Fusion Strategy.

Degree: MS, Bioproducts/Biosystems Science Engineering and Management, 2019, University of Minnesota

URL: http://hdl.handle.net/11299/202101

► Biosurfactants are amphipathic molecules required for vital processes in all life forms. They help to reduce surface tension facilitating interfacial processes such as breathing and… (more)

▼ Biosurfactants are amphipathic molecules required for vital processes in all life forms. They help to reduce surface tension facilitating interfacial processes such as breathing and evaporative cooling, modulate environmental conditions, control surface wettability, interact with substrates, form protective layers, etc. Thus, nature has evolved a wide variety of biosurfactants combining hydrophilic building blocks such as acid groups, sugars or polar amino acids with hydrophobic ones such as lipids, creating an enormous pallet of possibilities. Among them, hydrophobins (hereafter HFBs) are a family of self-assembling surfactant proteins with the highest surface activity known to date and an intrinsic amphipathic structure that does not require additional functional groups such as lipids or sugars. These characteristics give them a great potential for their industrial use as interfacial stabilizers, dispersal agents, surface modifiers and molecular anchors for protein immobilization on solids. The unique sequences and folding structures of HFBs particularly promote interfacial and intermolecular interactions, along with robust self-assembling mechanisms and surface activity. Unfortunately, a lack of knowledge on their sequence-structure-function relationships hinders the optimal selection of proteins for specific applications as well as manipulation of their properties. For a specific consideration, the use of HFBs for standard coating processes usually results in irregular products; at the same time, such an application requires a large-scale production that has been difficult to achieve limited by the productivity of native organisms, the HFB toxicity for heterologous hosts and the challenges of their purification. These obstacles suggest the need to leverage HFBs’ interfacial behaviors to better fit a broader range of applications. Therefore, an HFB from the fungus Trichoderma reesei is taken as a model surfactant protein in this work to explore the variation of its characteristics by a modular fusion strategy, as an alternative approach to protein directed mutagenesis and engineering. We aim to combine its high surfactant activity with the functionalities of different fusion partners to enhance its productivity and interfacial properties. Our results show that the fusion with a small metal binding protein from Nitrosomonas eurepaea (SMBP) achieves much improved product solubility and easier purification without compromising the hydrophobin properties. SMBP-HFBII shows a critical micelle concentration (CMC) < 0.5 mg/l and is prone to form stable nanobubbles of 50-60 nm radius and thin films at liquid-air interfaces. The adsorption of SMBP-HFBII on hydrophilic substrates (mica and glass) generates homogeneous coatings that reverse their wettability increasing the water contact angle (WCA) 460% and 70%, respectively. Adsorbed SMBP-HFBII also demonstrated a slight increase of Botrytis cinerea spores’ adhesion to coated glass, dependent on pH and spore concentration. This work shows that fusion HFBs can expand the…

Subjects/Keywords: Hydrophobin; Interfacial; Surfactant

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APA (6^th Edition):

Calixto Mancipe, N. (2019). Design and Production of High-Performance Hydrophobin Surfactant Proteins Using a Dual-Domain Fusion Strategy. (Masters Thesis). University of Minnesota. Retrieved from http://hdl.handle.net/11299/202101

Chicago Manual of Style (16^th Edition):

Calixto Mancipe, Natalia. “Design and Production of High-Performance Hydrophobin Surfactant Proteins Using a Dual-Domain Fusion Strategy.” 2019. Masters Thesis, University of Minnesota. Accessed February 19, 2020. http://hdl.handle.net/11299/202101.

MLA Handbook (7^th Edition):

Calixto Mancipe, Natalia. “Design and Production of High-Performance Hydrophobin Surfactant Proteins Using a Dual-Domain Fusion Strategy.” 2019. Web. 19 Feb 2020.

Vancouver:

Calixto Mancipe N. Design and Production of High-Performance Hydrophobin Surfactant Proteins Using a Dual-Domain Fusion Strategy. [Internet] [Masters thesis]. University of Minnesota; 2019. [cited 2020 Feb 19]. Available from: http://hdl.handle.net/11299/202101.

Council of Science Editors:

Calixto Mancipe N. Design and Production of High-Performance Hydrophobin Surfactant Proteins Using a Dual-Domain Fusion Strategy. [Masters Thesis]. University of Minnesota; 2019. Available from: http://hdl.handle.net/11299/202101

5. 円子, 未貴. 界面活性剤を用いた水媒体中でのアズレン誘導体の合成反応 : ASYNTHETIC REACTION OF AZULENE DERIVATIVES IN AN AQUEOUS MEDIUM IN THE PRESENCE OF ASURFACTANT.

Degree: 2009, Hosei University / 法政大学

URL: http://hdl.handle.net/10114/6114

► Owing to the increasing environmental concerns, organic reactions in an aqueous medium with no use oforganic solvents have attracted continuing attention. Although water, as a… (more)

Subjects/Keywords: water; surfactant; azulene

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APA (6^th Edition):

円子, �. (2009). 界面活性剤を用いた水媒体中でのアズレン誘導体の合成反応 : ASYNTHETIC REACTION OF AZULENE DERIVATIVES IN AN AQUEOUS MEDIUM IN THE PRESENCE OF ASURFACTANT. (Thesis). Hosei University / 法政大学. Retrieved from http://hdl.handle.net/10114/6114

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):

円子, 未貴. “界面活性剤を用いた水媒体中でのアズレン誘導体の合成反応 : ASYNTHETIC REACTION OF AZULENE DERIVATIVES IN AN AQUEOUS MEDIUM IN THE PRESENCE OF ASURFACTANT.” 2009. Thesis, Hosei University / 法政大学. Accessed February 19, 2020. http://hdl.handle.net/10114/6114.

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

MLA Handbook (7^th Edition):

円子, 未貴. “界面活性剤を用いた水媒体中でのアズレン誘導体の合成反応 : ASYNTHETIC REACTION OF AZULENE DERIVATIVES IN AN AQUEOUS MEDIUM IN THE PRESENCE OF ASURFACTANT.” 2009. Web. 19 Feb 2020.

Vancouver:

円子 �. 界面活性剤を用いた水媒体中でのアズレン誘導体の合成反応 : ASYNTHETIC REACTION OF AZULENE DERIVATIVES IN AN AQUEOUS MEDIUM IN THE PRESENCE OF ASURFACTANT. [Internet] [Thesis]. Hosei University / 法政大学; 2009. [cited 2020 Feb 19]. Available from: http://hdl.handle.net/10114/6114.

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

Council of Science Editors:

円子 �. 界面活性剤を用いた水媒体中でのアズレン誘導体の合成反応 : ASYNTHETIC REACTION OF AZULENE DERIVATIVES IN AN AQUEOUS MEDIUM IN THE PRESENCE OF ASURFACTANT. [Thesis]. Hosei University / 法政大学; 2009. Available from: http://hdl.handle.net/10114/6114

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

University of Oklahoma

6. Baker, Danielle Kimberly. CHARACTERIZATION OF POLYETHOXYLATED ALKYL PHENOLS WITH A HIGH DEGREE OF ETHOXYLATION AT THE SOLID-LIQUID INTERFACE.

Degree: PhD, 2016, University of Oklahoma

URL: http://hdl.handle.net/11244/34699

► Fully characterizing the behavior of a surfactant, from the mechanism of adsorption to the formation of micelles, is vital when taking the surfactant out of… (more)

▼ Fully characterizing the behavior of a surfactant, from the mechanism of adsorption to the formation of micelles, is vital when taking the surfactant out of the lab and into the real world. The critical micelle concentration, cloud point, and mechanism of adsorption are only a few aspects of a nonionic surfactant that must be understood. For nonionic surfactant solutions, the solution properties can change depending on the system temperature, salt concentration, salt type, etc. This dissertation focuses on the adsorption of high polyethoxylated alkyl phenols, more than 25 ethylene oxide units, on the hydrophilic silica surface and how environmental conditions affect the surfactant adsorption at the solid-liquid interface. The effects of ions of different salts on the adsorption densities and the shape of developed adsorption isotherms are related to the Hofmeister series. Depending on the ions present in solution, the maximum adsorption density is shown to increase or decrease in accordance with the Hofmeister series’s classification of ion as salting in or salting out. The salting out effect of sodium chloride causing an increase in adsorption density as well as a decrease in nonionic surfactant cloud points is examined as a fraction fluid, containing a high polyethoxylated alky phenol, travels through a packed ground shale or sand column. The effect of sodium chloride on a select few ionic surfactants traveling through the same packed ground shale or sand column is also analyzed. For the high polyethoxylated alky phenols, the formation of a coacervate hindered the surfactant migrating to the end of the column. For the ionic surfactants, the migration to the end of the packed column varied depending on the surfactant’s salt and temperature tolerance. Lastly, evidence is given with UV, quartz crystal microbalance, and ellipsometry analysis for a different mechanisms of adsorption for polyethoxylated alky phenols with a high degree of ethoxylation versus a low degree of ethoxylation. Advisors/Committee Members: Harwell, Jeffrey (advisor), Lobban, Lance (committee member), O'Rear, Edgar (committee member), Sabatini, David (committee member), Shiau, Benjamin (committee member).

Subjects/Keywords: Ethoxylated nonionic surfactant

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APA (6^th Edition):

Baker, D. K. (2016). CHARACTERIZATION OF POLYETHOXYLATED ALKYL PHENOLS WITH A HIGH DEGREE OF ETHOXYLATION AT THE SOLID-LIQUID INTERFACE. (Doctoral Dissertation). University of Oklahoma. Retrieved from http://hdl.handle.net/11244/34699

Chicago Manual of Style (16^th Edition):

Baker, Danielle Kimberly. “CHARACTERIZATION OF POLYETHOXYLATED ALKYL PHENOLS WITH A HIGH DEGREE OF ETHOXYLATION AT THE SOLID-LIQUID INTERFACE.” 2016. Doctoral Dissertation, University of Oklahoma. Accessed February 19, 2020. http://hdl.handle.net/11244/34699.

MLA Handbook (7^th Edition):

Baker, Danielle Kimberly. “CHARACTERIZATION OF POLYETHOXYLATED ALKYL PHENOLS WITH A HIGH DEGREE OF ETHOXYLATION AT THE SOLID-LIQUID INTERFACE.” 2016. Web. 19 Feb 2020.

Vancouver:

Baker DK. CHARACTERIZATION OF POLYETHOXYLATED ALKYL PHENOLS WITH A HIGH DEGREE OF ETHOXYLATION AT THE SOLID-LIQUID INTERFACE. [Internet] [Doctoral dissertation]. University of Oklahoma; 2016. [cited 2020 Feb 19]. Available from: http://hdl.handle.net/11244/34699.

Council of Science Editors:

Baker DK. CHARACTERIZATION OF POLYETHOXYLATED ALKYL PHENOLS WITH A HIGH DEGREE OF ETHOXYLATION AT THE SOLID-LIQUID INTERFACE. [Doctoral Dissertation]. University of Oklahoma; 2016. Available from: http://hdl.handle.net/11244/34699

7. Naqvi, Andleeb Zehra. Studies on surfactant system; -.

Degree: Chemistry, 2000, Aligarh Muslim University

URL: http://shodhganga.inflibnet.ac.in/handle/10603/28612

non

Bibliography p. 120-137

Advisors/Committee Members: Kabir-ud-din.

Subjects/Keywords: Surfactant; System

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APA (6^th Edition):

Naqvi, A. Z. (2000). Studies on surfactant system; -. (Thesis). Aligarh Muslim University. Retrieved from http://shodhganga.inflibnet.ac.in/handle/10603/28612

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):

Naqvi, Andleeb Zehra. “Studies on surfactant system; -.” 2000. Thesis, Aligarh Muslim University. Accessed February 19, 2020. http://shodhganga.inflibnet.ac.in/handle/10603/28612.

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

MLA Handbook (7^th Edition):

Naqvi, Andleeb Zehra. “Studies on surfactant system; -.” 2000. Web. 19 Feb 2020.

Vancouver:

Naqvi AZ. Studies on surfactant system; -. [Internet] [Thesis]. Aligarh Muslim University; 2000. [cited 2020 Feb 19]. Available from: http://shodhganga.inflibnet.ac.in/handle/10603/28612.

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

Council of Science Editors:

Naqvi AZ. Studies on surfactant system; -. [Thesis]. Aligarh Muslim University; 2000. Available from: http://shodhganga.inflibnet.ac.in/handle/10603/28612

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

University of Alberta

8. Stanley, Bob. Acid Labile Surfactants Containing Ketal-Linkage in Micellar Electrokinetic Chromatography and Electrospray Ionization Mass Spectrometry.

Degree: MS, Department of Chemistry, 2012, University of Alberta

URL: https://era.library.ualberta.ca/files/f7623c709

► The combination of micellar electrokinetic chromatography (MEKC) with electrospray ionization mass spectrometry (ESI-MS) would yield a very powerful analytical technique. However, hyphenating both techniques is… (more)

Subjects/Keywords: ALS; MEKC; ESI-MS; Surfactant

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APA (6^th Edition):

Stanley, B. (2012). Acid Labile Surfactants Containing Ketal-Linkage in Micellar Electrokinetic Chromatography and Electrospray Ionization Mass Spectrometry. (Masters Thesis). University of Alberta. Retrieved from https://era.library.ualberta.ca/files/f7623c709

Chicago Manual of Style (16^th Edition):

Stanley, Bob. “Acid Labile Surfactants Containing Ketal-Linkage in Micellar Electrokinetic Chromatography and Electrospray Ionization Mass Spectrometry.” 2012. Masters Thesis, University of Alberta. Accessed February 19, 2020. https://era.library.ualberta.ca/files/f7623c709.

MLA Handbook (7^th Edition):

Stanley, Bob. “Acid Labile Surfactants Containing Ketal-Linkage in Micellar Electrokinetic Chromatography and Electrospray Ionization Mass Spectrometry.” 2012. Web. 19 Feb 2020.

Vancouver:

Stanley B. Acid Labile Surfactants Containing Ketal-Linkage in Micellar Electrokinetic Chromatography and Electrospray Ionization Mass Spectrometry. [Internet] [Masters thesis]. University of Alberta; 2012. [cited 2020 Feb 19]. Available from: https://era.library.ualberta.ca/files/f7623c709.

Council of Science Editors:

Stanley B. Acid Labile Surfactants Containing Ketal-Linkage in Micellar Electrokinetic Chromatography and Electrospray Ionization Mass Spectrometry. [Masters Thesis]. University of Alberta; 2012. Available from: https://era.library.ualberta.ca/files/f7623c709

Texas A&M University

9. Sayedakram, Nawaf Ibrahim A. Simulation Study to Investigate the Effect of Natural Fractures on the Performance of Surfactant-Polymer Flood in Carbonate Reservoirs.

Degree: 2011, Texas A&M University

URL: http://hdl.handle.net/1969.1/ETD-TAMU-2010-08-8394

► This thesis presents a comprehensive simulation study on the impact of natural fractures on the performance of surfactant polymer flood in a field scale surfactantpolymer… (more)

▼ This thesis presents a comprehensive simulation study on the impact of natural fractures on the performance of surfactant polymer flood in a field scale surfactantpolymer flood. The simulation model utilized for the study is a dual porosity dual permeability model representing 1/8 of a 20-acre 5-spot pattern. The model parameters studied include wettability alteration, IFT changes and mobility reduction effect. The results of this study clearly indicate the importance of reservoir description and fracture modeling for a successful surfactant-polymer flood. Naturally fractured carbonate reservoirs are usually characterized by mixed wettablility and low matrix permeability which leads to low oil recovery and high remaining oil saturation. Enhanced oil recovery methods such as surfactant-polymer flood (SPF) enhance the recovery by increasing the spontaneous imbibitions either by lowering the interfacial tension or altering the wettability. However, one of the main reasons for failed surfactant-polymer floods is under-estimating the importance of the reservoir especially the description of natural fractures and their effect on recovery. Sensitivity runs were made to compare oil recovery capillary force, buoyancy force and viscous force. The simulation study indicates that critical water saturation should be reached before the start of surfactant-polymer flood to maximize oil recovery and utilize the capillary force. Also, when a surfactant alters the rock wettability, an optimum IFT should be identified for faster and higher imbibitions. The study shows that a contrast in permeability between that of the fracture and that of the matrix will result in a slightly lower oil recovery. Having the fracture perpendicular to the injector producer will result in a higher areal sweep and lower residual oil. A sensitivity study on the effect of the size of surfactant polymer slug was not conclusive. Maximum adsorption capacity was reached which was one of the causes of low imbibitions rate. Following the surfactant-polymer with water flood was able to reverse the adsorption and restore some of the movable oil. The results show that if the enhanced fluid that alter the wettability, imbibed in the matrix, injecting high IFT brine will increase the rate of imbibition. The study calls for further investigation of this phenomenon through research using a scaled laboratory model to verify the simulation results. Advisors/Committee Members: Mamora, Daulat D. (advisor), Schechter, David S. (committee member), Gresham, Larry . G. (committee member).

Subjects/Keywords: surfactant; polymer; chemical; simulation; EOR

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APA (6^th Edition):

Sayedakram, N. I. A. (2011). Simulation Study to Investigate the Effect of Natural Fractures on the Performance of Surfactant-Polymer Flood in Carbonate Reservoirs. (Thesis). Texas A&M University. Retrieved from http://hdl.handle.net/1969.1/ETD-TAMU-2010-08-8394

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):

Sayedakram, Nawaf Ibrahim A. “Simulation Study to Investigate the Effect of Natural Fractures on the Performance of Surfactant-Polymer Flood in Carbonate Reservoirs.” 2011. Thesis, Texas A&M University. Accessed February 19, 2020. http://hdl.handle.net/1969.1/ETD-TAMU-2010-08-8394.

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

MLA Handbook (7^th Edition):

Sayedakram, Nawaf Ibrahim A. “Simulation Study to Investigate the Effect of Natural Fractures on the Performance of Surfactant-Polymer Flood in Carbonate Reservoirs.” 2011. Web. 19 Feb 2020.

Vancouver:

Sayedakram NIA. Simulation Study to Investigate the Effect of Natural Fractures on the Performance of Surfactant-Polymer Flood in Carbonate Reservoirs. [Internet] [Thesis]. Texas A&M University; 2011. [cited 2020 Feb 19]. Available from: http://hdl.handle.net/1969.1/ETD-TAMU-2010-08-8394.

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

Council of Science Editors:

Sayedakram NIA. Simulation Study to Investigate the Effect of Natural Fractures on the Performance of Surfactant-Polymer Flood in Carbonate Reservoirs. [Thesis]. Texas A&M University; 2011. Available from: http://hdl.handle.net/1969.1/ETD-TAMU-2010-08-8394

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

North Carolina State University

10. Marinakos, Efstathia (Stella) Maria. Synthesis of Gold/Polymer Composites, Micelle/Polymer Composites, and Polymer Nanocapsules. Diffusion Studies and Encapsulation of Guest Molecules.

Degree: PhD, Chemistry, 2002, North Carolina State University

URL: http://www.lib.ncsu.edu/resolver/1840.16/3660

► The template synthesis of core / shell particles is described. One template employed as the core is a gold particle. Polymers employed as the shell… (more)

Subjects/Keywords: surfactant; nanoparticles

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APA (6^th Edition):

Marinakos, E. (. M. (2002). Synthesis of Gold/Polymer Composites, Micelle/Polymer Composites, and Polymer Nanocapsules. Diffusion Studies and Encapsulation of Guest Molecules. (Doctoral Dissertation). North Carolina State University. Retrieved from http://www.lib.ncsu.edu/resolver/1840.16/3660

Chicago Manual of Style (16^th Edition):

Marinakos, Efstathia (Stella) Maria. “Synthesis of Gold/Polymer Composites, Micelle/Polymer Composites, and Polymer Nanocapsules. Diffusion Studies and Encapsulation of Guest Molecules.” 2002. Doctoral Dissertation, North Carolina State University. Accessed February 19, 2020. http://www.lib.ncsu.edu/resolver/1840.16/3660.

MLA Handbook (7^th Edition):

Marinakos, Efstathia (Stella) Maria. “Synthesis of Gold/Polymer Composites, Micelle/Polymer Composites, and Polymer Nanocapsules. Diffusion Studies and Encapsulation of Guest Molecules.” 2002. Web. 19 Feb 2020.

Vancouver:

Marinakos E(M. Synthesis of Gold/Polymer Composites, Micelle/Polymer Composites, and Polymer Nanocapsules. Diffusion Studies and Encapsulation of Guest Molecules. [Internet] [Doctoral dissertation]. North Carolina State University; 2002. [cited 2020 Feb 19]. Available from: http://www.lib.ncsu.edu/resolver/1840.16/3660.

Council of Science Editors:

Marinakos E(M. Synthesis of Gold/Polymer Composites, Micelle/Polymer Composites, and Polymer Nanocapsules. Diffusion Studies and Encapsulation of Guest Molecules. [Doctoral Dissertation]. North Carolina State University; 2002. Available from: http://www.lib.ncsu.edu/resolver/1840.16/3660

Penn State University

11. Simmons, Brett Patrick. THE ROLE OF EXON B OF THE 5’ UNTRANSLATED REGION OF SURFACTANT PROTEIN A IN THE REGULATION OF EXPRESSION.

Degree: MS, Genetics, 2008, Penn State University

URL: https://etda.libraries.psu.edu/catalog/8863

► Gene regulation is a complex and multifaceted process, and both coding and non-coding sequences are capable of regulatory function. The 5’ untranslated region (UTR) of… (more)

▼ Gene regulation is a complex and multifaceted process, and both coding and non-coding sequences are capable of regulatory function. The 5’ untranslated region (UTR) of a gene can have a significant effect on regulation at the levels of transcription and translation. Post-transcription, the 5’ UTR is capable of conferring mRNA stability, providing binding sites for translation machinery, containing degradation and/or localization signals, and other functions dependent on tertiary RNA structure and RNA-protein structure. One gene in which the 5’ UTR is essential for proper control of protein expression is Surfactant Protein A (SP-A). SP-A is one of four pulmonary surfactant-associated proteins, all of which are encoded by separate genes. A thin liquid layer covers the distal airspaces or alveolar spaces. Pulmonary surfactant is found between the air-liquid interface of the distal airspaces and its function is to reduce surface tension at low lung volumes and prevent alveolar collapse. Pulmonary surfactant is comprised of proteins and lipids that together play a vital role in lung function and host defense. Furthermore, aberrant expression of SP-A is a characteristic of many pulmonary diseases and disorders, including asthma, respiratory distress syndrome, and cancer, among others. Previous studies have indicated that exon B of the SP-A 5’ UTR may be a potent cis-acting element of post-transcriptional and translational regulation. Using the luciferase assay and quantitative real-time PCR, the translational enhancer capacity of this 5’ UTR exon was assessed to investigate the hypothesis that the 30-basepair exon B sequence is a cis-acting translational enhancer. Transcription was normalized by using an SV40 promoter and through the calculation of a translational index (activity divided by relative mRNA content). To investigate the function of exon B in the context of the whole SP-A 5’ UTR, exon B was deleted from the 5’ UTR. In another construct, the exon B sequence was replaced with a 30-basepair random sequence. Compared with the whole SP-A 5’ UTR construct, these two constructs, which lack the exon B sequence, showed reduced luciferase activity. This indicated that exon B is capable of increasing translation activity and could have resulted from an increase in stability, altered localization patterns, or an increase in translation efficiency. To determine whether exon B acts as a translational enhancer in the context of other 5’ UTR sequences, constructs that each contained one of two independent guest 5’ UTRs cloned downstream of the B exon were used in a guest 5’ UTR study. The SP-B and SP-D 5’ UTRs functioned as guest 5’ UTRs. While the size of the leader sequence appeared to have little effect on translation, constructs containing the complete exon B sequence were found to have activities twice as high as the activities of 5’ UTR constructs containing only the guest 5’ UTRs. Constructs containing exon B also exhibited twice as much activity as those containing random 30-nucleotide sequences in place of exon B.…

Subjects/Keywords: Surfactant Protein A; Translation

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

APA (6^th Edition):

Simmons, B. P. (2008). THE ROLE OF EXON B OF THE 5’ UNTRANSLATED REGION OF SURFACTANT PROTEIN A IN THE REGULATION OF EXPRESSION. (Masters Thesis). Penn State University. Retrieved from https://etda.libraries.psu.edu/catalog/8863

Chicago Manual of Style (16^th Edition):

Simmons, Brett Patrick. “THE ROLE OF EXON B OF THE 5’ UNTRANSLATED REGION OF SURFACTANT PROTEIN A IN THE REGULATION OF EXPRESSION.” 2008. Masters Thesis, Penn State University. Accessed February 19, 2020. https://etda.libraries.psu.edu/catalog/8863.

MLA Handbook (7^th Edition):

Simmons, Brett Patrick. “THE ROLE OF EXON B OF THE 5’ UNTRANSLATED REGION OF SURFACTANT PROTEIN A IN THE REGULATION OF EXPRESSION.” 2008. Web. 19 Feb 2020.

Vancouver:

Simmons BP. THE ROLE OF EXON B OF THE 5’ UNTRANSLATED REGION OF SURFACTANT PROTEIN A IN THE REGULATION OF EXPRESSION. [Internet] [Masters thesis]. Penn State University; 2008. [cited 2020 Feb 19]. Available from: https://etda.libraries.psu.edu/catalog/8863.

Council of Science Editors:

Simmons BP. THE ROLE OF EXON B OF THE 5’ UNTRANSLATED REGION OF SURFACTANT PROTEIN A IN THE REGULATION OF EXPRESSION. [Masters Thesis]. Penn State University; 2008. Available from: https://etda.libraries.psu.edu/catalog/8863

Oregon State University

12. Lee, Hyo Jin. Molecular origins of surfactant-mediated stabilization of protein.

Degree: PhD, Chemical Engineering, 2012, Oregon State University

URL: http://hdl.handle.net/1957/33834

► Nonionic surfactants are commonly used to stabilize proteins during upstream and downstream processing and drug formulation. Surfactants stabilize the proteins through two major mechanisms: (i)… (more)

▼ Nonionic surfactants are commonly used to stabilize proteins during upstream and downstream processing and drug formulation. Surfactants stabilize the proteins through two major mechanisms: (i) their preferential location at nearby interfaces, in this way precluding protein adsorption; and/or (ii) their association with protein into "complexes" that prevent proteins from interacting with surfaces as well as each other. In general, both mechanisms must be at play for effective protein stabilization against aggregation and activity loss, but selection of surfactants for protein stabilization currently is not made with benefit of any quantitative, predictive information to ensure that this requirement is met. In certain circumstances the kinetics of surface tension depression (by surfactant) in protein-surfactant mixtures has been observed to be greater than that recorded for surfactant alone at the same concentration. We compared surface tension depression by poloxamer 188 (Pluronic® F68), polysorbate 80 (PS 80), and polysorbate 20 (PS 20) in the presence and absence of lysozyme and recombinant protein, at different surfactant concentrations and temperatures. The kinetic results were interpreted with reference to a mechanism for surfactant adsorption governed by the formation of a rate-limiting structural intermediate (i.e., an "activated complex") comprised of surfactant aggregates and protein. The presence of lysozyme was seen to increase the rate of surfactant adsorption in relation to surfactant acting alone at the same concentrations for the polysorbates while less of an effect was seen for Pluronic® F68. However, the addition of salt was observed to accelerate the surface tension depression of Pluronic® F68 in the presence of lysozyme. The addition of a more hydrophobic, surface active protein (Amgen recombinant protein) in place of lysozyme resulted in greater enhancement of surfactant adsorption than that recorded in the presence of lysozyme. A simple thermodynamic analysis indicated the presence of protein caused a reduction in ∆G for the surfactant adsorption process, with this reduction deriving entirely from a reduction in ∆H. We suggest that protein accelerates the adsorption of these surfactants by disrupting their self associations, increasing the concentration of surfactant monomers near the interface. Based on these air-water tensiometry results, it is fair to expect that accelerated surfactant adsorption in the presence of protein (observed with PS 20 and PS 80) will occur with surfactants that stabilize protein mainly by their own adsorption at interfaces, and that the absence of accelerated surfactant adsorption (observed with F68) will be observed with surfactants that form stable surfactant-protein associations. Optical waveguide lightmode spectroscopy was used to test this expectation. Adsorption kinetics were recorded for surfactants (PS 20, PS 80, or F68) and protein (lysozyme or Amgen recombinant protein) at a hydrophilic solid (SiO₂-TiO₂) surface. Experiments were performed in sequential… Advisors/Committee Members: McGuire, Joseph (advisor), McAuley, Arnold (committee member).

Subjects/Keywords: surfactant; Surface active agents

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APA (6^th Edition):

Lee, H. J. (2012). Molecular origins of surfactant-mediated stabilization of protein. (Doctoral Dissertation). Oregon State University. Retrieved from http://hdl.handle.net/1957/33834

Chicago Manual of Style (16^th Edition):

Lee, Hyo Jin. “Molecular origins of surfactant-mediated stabilization of protein.” 2012. Doctoral Dissertation, Oregon State University. Accessed February 19, 2020. http://hdl.handle.net/1957/33834.

MLA Handbook (7^th Edition):

Lee, Hyo Jin. “Molecular origins of surfactant-mediated stabilization of protein.” 2012. Web. 19 Feb 2020.

Vancouver:

Lee HJ. Molecular origins of surfactant-mediated stabilization of protein. [Internet] [Doctoral dissertation]. Oregon State University; 2012. [cited 2020 Feb 19]. Available from: http://hdl.handle.net/1957/33834.

Council of Science Editors:

Lee HJ. Molecular origins of surfactant-mediated stabilization of protein. [Doctoral Dissertation]. Oregon State University; 2012. Available from: http://hdl.handle.net/1957/33834

13. Bleta, Rudina. Systèmes fluorés pour la conception de matériaux poreux : Matrices pour la physisorption de biomolécules : Fluorinated systems for the design of porous material : Matrices for the physisorption of biomolecules.

Degree: Docteur es, Chimie et Physico-Chimie Moléculaires, 2007, Université Henri Poincaré – Nancy I

URL: http://www.theses.fr/2007NAN10111

►

Les propriétés d’auto organisation de tensioactifs ainsi que celles de la chimie de la silice ont permis de préparer des matériaux mésoporeux organisés selon une… (more)

▼

Les propriétés d’auto organisation de tensioactifs ainsi que celles de la chimie de la silice ont permis de préparer des matériaux mésoporeux organisés selon une symétrie hexagonale, cubique ou lamellaire dont la taille des pores varie de 2 à plus de 10 nm. Ils sont depuis quelques années le centre d’intérêt d’universitaires et d’industriels qui développent des recherches fondamentales et appliquées. La compréhension globale des mécanismes de synthèse et la maîtrise des propriétés structurales et texturales des matériaux mésoporeux sont nécessaires pour envisager leur utilisation dans un quelconque procédé industriel. Dans ce cadre, nous avons étudié les relations entre les propriétés physico-chimiques d’un tensioactif fluoré C7F15C2H4(OC2H4)8OH et les caractéristiques des silices mésoporeuses. Malgré l’existence d’une phase micellaire, les canaux poreux des matériaux obtenus avec ces solutions micellaires ne sont pas organisés. En revanche, l’addition de la perfluorodécaline provoque une structuration du matériau selon une symétrie hexagonale. L’utilisation de divers fluorocarbures, ayant des structures moléculaires différentes, montre que le phénomène est associé au déplacement de la courbe de point de trouble vers les hautes températures. De plus, il a été montre que la préparation de matériaux à porosité hiérarchisée à partir d'émulsions de type huile dans eau est corrélée à la température d’inversion de phase du système eau/huile/tensioactif. Enfin, les matériaux mésoporeux ont été mis à profit pour immobiliser des enzymes et les résultats montrent que les lipases physisorbées conservent une activité catalytique.

The self-assembly properties of surfactants and those of silica chemistry have led to the preparation of ordered mesoporous materials with hexagonal, cubic or lamellar symmetry and with pore sizes varying from 2 to more than 10 nm. Recently, they have aroused of great deal of interest to academics and industrialists for the development of fundamental and applied research. However, their use in any industrial process needs a careful consideration of the total comprehension of the synthesis mechanism as well as the control of their structural and textural properties. In this work, the relation between the physicochemical properties of a fluorinated surfactant, C7F15C2H4(OC2H4)8OH, and the characteristics of mesoporous silica was investigated. In spite of the existence of a micellar phase, only wormlike mesoporous materials were obtained. On the other hand, the addition of the perfluorodecalin led to the organisation of the channels according to a hexagonal symmetry. The use of various fluorocarbons of different molecular structures evidenced that this phenomenon is associated to the shift of the cloud point curve towards higher temperatures. Hierarchically porous silica were also prepared from oil-in-water emulsions and their characteristics were correlated to the phase inversion temperature of the surfactant/water/oil system. Finally, the mesoporous materials were used as hosts for the physisorption…

Advisors/Committee Members: Stébé, Marie-José (thesis director), Blin, Jean-Luc (thesis director).

Subjects/Keywords: Surfactant fluoré

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APA (6^th Edition):

Bleta, R. (2007). Systèmes fluorés pour la conception de matériaux poreux : Matrices pour la physisorption de biomolécules : Fluorinated systems for the design of porous material : Matrices for the physisorption of biomolecules. (Doctoral Dissertation). Université Henri Poincaré – Nancy I. Retrieved from http://www.theses.fr/2007NAN10111

Chicago Manual of Style (16^th Edition):

Bleta, Rudina. “Systèmes fluorés pour la conception de matériaux poreux : Matrices pour la physisorption de biomolécules : Fluorinated systems for the design of porous material : Matrices for the physisorption of biomolecules.” 2007. Doctoral Dissertation, Université Henri Poincaré – Nancy I. Accessed February 19, 2020. http://www.theses.fr/2007NAN10111.

MLA Handbook (7^th Edition):

Bleta, Rudina. “Systèmes fluorés pour la conception de matériaux poreux : Matrices pour la physisorption de biomolécules : Fluorinated systems for the design of porous material : Matrices for the physisorption of biomolecules.” 2007. Web. 19 Feb 2020.

Vancouver:

Bleta R. Systèmes fluorés pour la conception de matériaux poreux : Matrices pour la physisorption de biomolécules : Fluorinated systems for the design of porous material : Matrices for the physisorption of biomolecules. [Internet] [Doctoral dissertation]. Université Henri Poincaré – Nancy I; 2007. [cited 2020 Feb 19]. Available from: http://www.theses.fr/2007NAN10111.

Council of Science Editors:

Bleta R. Systèmes fluorés pour la conception de matériaux poreux : Matrices pour la physisorption de biomolécules : Fluorinated systems for the design of porous material : Matrices for the physisorption of biomolecules. [Doctoral Dissertation]. Université Henri Poincaré – Nancy I; 2007. Available from: http://www.theses.fr/2007NAN10111

Université Laval

14. Hamel-Auger, Mélanie. Réponse des macrophages pulmonaires au surfactant pulmonaire oxydé.

Degree: 2017, Université Laval

URL: http://hdl.handle.net/20.500.11794/27837

►

Problématique : Le surfactant pulmonaire est une structure vitale essentielle à l’homéostasie pulmonaire. Étant composé majoritairement de phospholipides, il est particulièrement susceptible à l’oxydation puisqu’il… (more)

▼

Problématique : Le surfactant pulmonaire est une structure vitale essentielle à l’homéostasie pulmonaire. Étant composé majoritairement de phospholipides, il est particulièrement susceptible à l’oxydation puisqu’il est en constante interaction avec l’environnement extérieur. Par des mécanismes encore inconnus, les macrophages pulmonaires jouent un rôle majeur dans l’élimination du surfactant pulmonaire endommagé. Objectifs : 1) Caractériser la réponse transcriptionnelle et fonctionnelle des macrophages au surfactant pulmonaire sain et traité au peroxynitrite (ONOO⁻) et 2) investiguer le rôle de l’endocytose dans l’initiation de cette réponse. Méthodes : Des macrophages murins isolés par lavages bronchoalvéolaires ou différenciés de la moelle osseuse ont été exposés à du surfactant pulmonaire sain ou traité au ONOO⁻, avec ou sans Latrunculine A, un inhibiteur des mécanismes d’endocytose dépendant de l’actine. L’expression de gènes impliqués dans la capture (marco, msr1, cd36), l’accumulation intracellulaire (plin2) et l’export (abca1, abcg1, srb1) lipidique a été évaluée par qPCR, ainsi que les capacités fonctionnelles d’export lipidique. Résultats : L’addition de surfactant pulmonaire sain ou traité au ONOO⁻ augmente l’expression de marco, msr1, cd36 et plin2 et diminue l’expression d’abca1, abcg1 et scarb1 chez les macrophages. Toutefois, certaines différences transcriptionnelles ont été observées entre les macrophages pulmonaires primaires et ceux dérivés de moelle osseuse. Également, qu’il soit sain ou oxydé, le surfactant engendre une diminution des capacités d’efflux de cholestérol des macrophages différenciés. De plus, ces impacts transcriptionnels et fonctionnels ne semblent pas affectés par un traitement à la Latrunculine A. Conclusion : En présence de surfactant, et ce, indépendamment son niveau d’oxydation, les macrophages pulmonaires semblent favoriser les mécanismes de capture et d’accumulation lipidique. Ainsi, aux dépens de ces mécanismes priorisés, les deux espèces présentent conjointement une diminution à la fois transcriptionnelle et fonctionnelle des mécanismes d’export lipidique.

Problematic: Pulmonary surfactant is a vital structure essential to reduce the surface tension at the liquid-air interface. It is mainly composed of phospholipids and is susceptible to oxidation due to its close interaction with the external environment. Pulmonary macrophages play a major role in degrading damaged surfactant. However, the mechanisms used by pulmonary macrophages to detect and initiate its degradation are still unknown. Objectives: 1) To characterize the transcriptional and functional response of macrophages to native and peroxynitrite (ONOO⁻)-treated pulmonary surfactant and 2) to investigate the role of endocytosis in the initiation of this response. Methods: Primary mouse pulmonary macrophages isolated from bronchoalveolar lavages or differentiated from the bone marrow were exposed to native or ONOO⁻-treated pulmonary surfactant with or without endocytosis inhibitors (Latrunculin A). Expression of key…

Advisors/Committee Members: Morissette, Mathieu.

Subjects/Keywords: Macrophages alvéolaires; Surfactant pulmonaire

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APA (6^th Edition):

Hamel-Auger, M. (2017). Réponse des macrophages pulmonaires au surfactant pulmonaire oxydé. (Thesis). Université Laval. Retrieved from http://hdl.handle.net/20.500.11794/27837

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):

Hamel-Auger, Mélanie. “Réponse des macrophages pulmonaires au surfactant pulmonaire oxydé.” 2017. Thesis, Université Laval. Accessed February 19, 2020. http://hdl.handle.net/20.500.11794/27837.

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

MLA Handbook (7^th Edition):

Hamel-Auger, Mélanie. “Réponse des macrophages pulmonaires au surfactant pulmonaire oxydé.” 2017. Web. 19 Feb 2020.

Vancouver:

Hamel-Auger M. Réponse des macrophages pulmonaires au surfactant pulmonaire oxydé. [Internet] [Thesis]. Université Laval; 2017. [cited 2020 Feb 19]. Available from: http://hdl.handle.net/20.500.11794/27837.

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

Council of Science Editors:

Hamel-Auger M. Réponse des macrophages pulmonaires au surfactant pulmonaire oxydé. [Thesis]. Université Laval; 2017. Available from: http://hdl.handle.net/20.500.11794/27837

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

Cornell University

15. Chen, Hao. A Surfactant-Free Strategy For Synthesizing And Processing Intermetallic Platinum-Based Nanoparticle Catalysts .

Degree: 2013, Cornell University

URL: http://hdl.handle.net/1813/34249

► In this thesis, a surfactant-free Np-KCl matrix method (Np stands for nanoparticle, KCl is potassium chloride) is developed for the synthesis of nanoparticles with controlled… (more)

Subjects/Keywords: surfactant free; nanoparticle; catalyst

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APA (6^th Edition):

Chen, H. (2013). A Surfactant-Free Strategy For Synthesizing And Processing Intermetallic Platinum-Based Nanoparticle Catalysts . (Thesis). Cornell University. Retrieved from http://hdl.handle.net/1813/34249

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):

Chen, Hao. “A Surfactant-Free Strategy For Synthesizing And Processing Intermetallic Platinum-Based Nanoparticle Catalysts .” 2013. Thesis, Cornell University. Accessed February 19, 2020. http://hdl.handle.net/1813/34249.

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

MLA Handbook (7^th Edition):

Chen, Hao. “A Surfactant-Free Strategy For Synthesizing And Processing Intermetallic Platinum-Based Nanoparticle Catalysts .” 2013. Web. 19 Feb 2020.

Vancouver:

Chen H. A Surfactant-Free Strategy For Synthesizing And Processing Intermetallic Platinum-Based Nanoparticle Catalysts . [Internet] [Thesis]. Cornell University; 2013. [cited 2020 Feb 19]. Available from: http://hdl.handle.net/1813/34249.

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

Council of Science Editors:

Chen H. A Surfactant-Free Strategy For Synthesizing And Processing Intermetallic Platinum-Based Nanoparticle Catalysts . [Thesis]. Cornell University; 2013. Available from: http://hdl.handle.net/1813/34249

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

University of Oklahoma

16. Wang, Shengbo. CHARACTERIZATION OF SURFACTANTS AND TRACER PROPERTIES FOR POTENTIAL EOR APPLICATIONS.

Degree: PhD, 2017, University of Oklahoma

URL: http://hdl.handle.net/11244/51873

► There are some challenges in chemical flooding, such as, gas finger problem usually occurred in field tests, potential scale problems of chemical slug caused by… (more)

▼ There are some challenges in chemical flooding, such as, gas finger problem usually occurred in field tests, potential scale problems of chemical slug caused by precipitation due to incompatibility between chemical solution and formation brine, and drawbacks of experimental designing of chemical flooding. In this work, three challenges are mainly discussed in following chapters. Chapter one focuses on optimization of designing single well test; chapter two discusses the feasibility of foam stabilized by nanoparticles in porous media; chapter three states that coacervates problems are occurred in preparation of chemical solutions. The summary of three topics is addressed below. The first chapter, the single well chemical tracer test (SWCTT) has emerged in the past decades as a method for measuring oil saturation prior to and/or after EOR operations, to measure the recovery performance in-situ. To use this technology, the partition coefficients of the selected tracers are essential for estimating the level of residual oil at the targeted single well. Commonly, injection of short chain alcohols and ethyl acetate, a reactive tracer, is carried out for the tracer slug, mainly based on site-specific reservoir conditions, to accurately determine the level of oil saturation in-situ. However, injection of ethyl formate has been less common due to its fast hydrolysis rate under elevated temperature, which increases the challenges in data interpretation. Therefore, a systematic study for using ethyl formate under mid-range temperature (<60°C); -as commonly found in mature oil field in the U.S., show the potential to be applied for SWCTT. As part of the design effort for a series of EOR field tests to manage the project risk, we particularly assessed the relationships between the partition coefficients of reactive tracers and subsurface conditions; -such as salinity, temperatures, type of electrolytes and the equivalent alkane carbon number (EACN) of the crude oil experiments were performed under various reservoir conditions as a function of actual site characteristics at the targeted high saline formations. In brief, our data clearly show that the (oil/water) partition coefficient of ethyl formate increase steadily with increasing NaCl concentrations, ranging from 10,000mg/L (0.17M) to 250,000mg/L (4.28M). A similar upward trend was observed for increasing temperature between 25°C to 52°C; however, the partition coefficient decrease inversely with increasing the crude oil EACN over the range from 8 to 12, which are common for domestic oil samples. It was also showed that brine with high NaCl concentration yielded higher partition coefficients. In contrast, brine with high CaCl2 and BaCl2 concentration yielded lower values. And MgCl2 performed somewhat unusual trend in our tests. These results further indicate that the partition coefficient of the reactive tracer, ethyl formate, is sensitive to change in salinity, temperatures, type of electrolytes and EACN, as observed for other chemical tracers. In addition, based… Advisors/Committee Members: Shiau, Bor-Jier (advisor), Harwell, Jeffery (committee member), Jamili, Ahmad (committee member), Wu, Xingru (committee member), Pournik, Maysam (committee member).

Subjects/Keywords: petroleum; foam flooding; surfactant coacervation

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

APA (6^th Edition):

Wang, S. (2017). CHARACTERIZATION OF SURFACTANTS AND TRACER PROPERTIES FOR POTENTIAL EOR APPLICATIONS. (Doctoral Dissertation). University of Oklahoma. Retrieved from http://hdl.handle.net/11244/51873

Chicago Manual of Style (16^th Edition):

Wang, Shengbo. “CHARACTERIZATION OF SURFACTANTS AND TRACER PROPERTIES FOR POTENTIAL EOR APPLICATIONS.” 2017. Doctoral Dissertation, University of Oklahoma. Accessed February 19, 2020. http://hdl.handle.net/11244/51873.

MLA Handbook (7^th Edition):

Wang, Shengbo. “CHARACTERIZATION OF SURFACTANTS AND TRACER PROPERTIES FOR POTENTIAL EOR APPLICATIONS.” 2017. Web. 19 Feb 2020.

Vancouver:

Wang S. CHARACTERIZATION OF SURFACTANTS AND TRACER PROPERTIES FOR POTENTIAL EOR APPLICATIONS. [Internet] [Doctoral dissertation]. University of Oklahoma; 2017. [cited 2020 Feb 19]. Available from: http://hdl.handle.net/11244/51873.

Council of Science Editors:

Wang S. CHARACTERIZATION OF SURFACTANTS AND TRACER PROPERTIES FOR POTENTIAL EOR APPLICATIONS. [Doctoral Dissertation]. University of Oklahoma; 2017. Available from: http://hdl.handle.net/11244/51873

Texas A&M University

17. Zhou, Xilong. Bulk and Adsorption Properties of Surfactant Entrapped in Polyelectrolyte Complex Nanoparticles.

Degree: MS, Petroleum Engineering, 2016, Texas A&M University

URL: http://hdl.handle.net/1969.1/157737

► With the wide application of nanotechnology in petroleum industry, transportation of nanoparticles in porous media has attracted a growing interest. This thesis focuses on investigating… (more)

▼ With the wide application of nanotechnology in petroleum industry, transportation of nanoparticles in porous media has attracted a growing interest. This thesis focuses on investigating the bulk and adsorption properties of surfactant entrapped in polyelectrolyte complex (PEC) nanoparticles. A stable surfactant entrapped in PEC system was optimized and obtained varying parameters of the preparation protocol including pH of PEI, surfactant/PEI concentrations and surfactant to PEI weight ratio. Meanwhile, the effect of different parameters on the bulk properties of PEC was investigated. In addition, surfactant entrapment efficiency (EE) of PEC was obtained using methylene blue (MB) titration method. A TOC/TN analytical method was developed to study the static adsorption of PEC via measuring the concentration of PEI and surfactant in the PEC suspension. The prepared PEC suspension was agitated with sand grains for different time periods and analyzed using the developed TOC/TN analytical method. The TOC/TN results showed a large decrease of surfactant concentration and a small decrease of PEI concentration after shaking equilibrium. In addition, study revealed that PEC coated sand grains were more likely to adsorb surfactant than those not coated by PEC. A hypothesis of PEC adsorption model was proposed based on the observations and proved. During the PEC adsorption test, a large amount of PECs and a small amount of free PEI will be firstly adsorbed onto the sand surface and form the first layer. Then free surfactant will be adsorbed onto PEC/PEI coated surface due to the electrostatic reaction and the increasing surface area of the distorted nanoparticles on sand surface. Quartz crystal microbalance with dissipation (QCM-D) instrument and silicon sensor were used to confirm the proposed model by monitoring the real-time adsorption of PEC and surfactant in DI water. The silicon sensor was firstly flushed and incubated by PEC suspension, rinsed by DI water and then rinsed and incubated by surfactant solution. From frequency and dissipation data, the formation of the rigid PEC/PEI layer and the viscoelastic surfactant layer were detected. This observation agreed well with the proposed PEC adsorption model. Based on the proposed model, the wettability of rock surface may be changed by surfactant entrapped in PEC system through the amphiphilic properties of the surfactants adsorbed on the rock surface. The effect of salinity and sand type on PEC adsorption was investigated, too. PEC adsorbed to sand surface faster in electrolyte solution than in DI water which can be explained by the Derjaguin-Landau-Verwey-Overbeek (DLVO) theory. In addition, in DI water a faster adsorption of PEC on carbonate than sandstone was observed. Advisors/Committee Members: Liang, Jenn-Tai (advisor), Nasr-El-Din, Hisham (committee member), Cheng, Zhengdong (committee member).

Subjects/Keywords: surfactant; polyelectrolyte; nanoparticles; adsorption

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APA (6^th Edition):

Zhou, X. (2016). Bulk and Adsorption Properties of Surfactant Entrapped in Polyelectrolyte Complex Nanoparticles. (Masters Thesis). Texas A&M University. Retrieved from http://hdl.handle.net/1969.1/157737

Chicago Manual of Style (16^th Edition):

Zhou, Xilong. “Bulk and Adsorption Properties of Surfactant Entrapped in Polyelectrolyte Complex Nanoparticles.” 2016. Masters Thesis, Texas A&M University. Accessed February 19, 2020. http://hdl.handle.net/1969.1/157737.

MLA Handbook (7^th Edition):

Zhou, Xilong. “Bulk and Adsorption Properties of Surfactant Entrapped in Polyelectrolyte Complex Nanoparticles.” 2016. Web. 19 Feb 2020.

Vancouver:

Zhou X. Bulk and Adsorption Properties of Surfactant Entrapped in Polyelectrolyte Complex Nanoparticles. [Internet] [Masters thesis]. Texas A&M University; 2016. [cited 2020 Feb 19]. Available from: http://hdl.handle.net/1969.1/157737.

Council of Science Editors:

Zhou X. Bulk and Adsorption Properties of Surfactant Entrapped in Polyelectrolyte Complex Nanoparticles. [Masters Thesis]. Texas A&M University; 2016. Available from: http://hdl.handle.net/1969.1/157737

18. Huang, Weicong. Drag Reduction in Pipeline by Polymer-Surfactant and Polymer-Polymer Mixtures.

Degree: 2015, University of Waterloo

URL: http://hdl.handle.net/10012/9853

► Extensive researches have been conducted to investigate into the drag reduction behavior of the polymer-surfactant mixture and the polymer-polymer mixture. The drag reduction effect of… (more)

Subjects/Keywords: Drag reduction polymer surfactant mixture

12 more images…

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APA (6^th Edition):

Huang, W. (2015). Drag Reduction in Pipeline by Polymer-Surfactant and Polymer-Polymer Mixtures. (Thesis). University of Waterloo. Retrieved from http://hdl.handle.net/10012/9853

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):

Huang, Weicong. “Drag Reduction in Pipeline by Polymer-Surfactant and Polymer-Polymer Mixtures.” 2015. Thesis, University of Waterloo. Accessed February 19, 2020. http://hdl.handle.net/10012/9853.

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

MLA Handbook (7^th Edition):

Huang, Weicong. “Drag Reduction in Pipeline by Polymer-Surfactant and Polymer-Polymer Mixtures.” 2015. Web. 19 Feb 2020.

Vancouver:

Huang W. Drag Reduction in Pipeline by Polymer-Surfactant and Polymer-Polymer Mixtures. [Internet] [Thesis]. University of Waterloo; 2015. [cited 2020 Feb 19]. Available from: http://hdl.handle.net/10012/9853.

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

Council of Science Editors:

Huang W. Drag Reduction in Pipeline by Polymer-Surfactant and Polymer-Polymer Mixtures. [Thesis]. University of Waterloo; 2015. Available from: http://hdl.handle.net/10012/9853

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

Texas A&M University

19. Ng, Jun Hong Clarence. Corrosion of C-95, N-80, S13Cr Metal at HP/HT Conditions and the Effects of Viscoelastic Surfactants on Corrosion.

Degree: MS, Petroleum Engineering, 2017, Texas A&M University

URL: http://hdl.handle.net/1969.1/165877

► In the oil and gas industry, corrosion damage during treatments often occurs due to the use of corrosive treatment fluids and can result in problems… (more)

▼ In the oil and gas industry, corrosion damage during treatments often occurs due to the use of corrosive treatment fluids and can result in problems such as tubular or equipment failure, and leaking. These problems can incur high costs of maintenance and pose as safety hazards to workers on site. Hydrochloric acid (HCl) is a cheap and cost effective fluid that is commonly used in the oil and gas industry to dissolve scale and acidize formations. However, at high temperatures, it becomes extremely corrosive. Alternative acidizing fluids are typically used in place of HCl at these temperatures. However, in the event that HCl is required, corrosion inhibitors are added to the solution. In this work, the corrosion rates of two blends of HCl based acidizing fluids were tested on C-95, N-80, and S13Cr. The results show that the corrosion rate of the acidizing fluid is the lowest for N-80 metal under all conditions tested. An increase in corrosion rates for blend A tests as acid concentration increased was observed to be higher at 280°F than at 240°F despite a 1 vol% increase in corrosion inhibitor concentration to compensate for the increase in acid concentration. The increase in corrosion rates at 240°F ranged from 0% to 9% while the range increased to 17% to 36% at 280°F. Blend B showed significant reduction in protection for N-80 at 280°F when acid concentration was raised to 20 wt% with the change in corrosion rate increasing to 68.2% from 9.2% at 240°F. In addition, VES was shown to influence the corrosion rates of N-80 and S13Cr metal negatively. The absence of VES from blend B at 280°F showed a corrosion rate of 0.0216 lb/ft² and 0.0159 lb/ft² for S13Cr and N-80, respectively. These rates increased to 0.0253 lb/ft² and 0.0169 lb/ft² with 5% VES, and to 0.0264 lb/ft² and 0.0187 lb/ft² respectively when 8% VES was used. A green coloration of the post-corrosion solution was observed when blend A was used with S13Cr metal. Advisors/Committee Members: Nasr-El-Din, Hisham (advisor), Hascakir, Berna (committee member), El-Halwagi, Mahmoud (committee member).

Subjects/Keywords: Corrosion; Hydrochloric acid; Viscoelastic Surfactant

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APA (6^th Edition):

Ng, J. H. C. (2017). Corrosion of C-95, N-80, S13Cr Metal at HP/HT Conditions and the Effects of Viscoelastic Surfactants on Corrosion. (Masters Thesis). Texas A&M University. Retrieved from http://hdl.handle.net/1969.1/165877

Chicago Manual of Style (16^th Edition):

Ng, Jun Hong Clarence. “Corrosion of C-95, N-80, S13Cr Metal at HP/HT Conditions and the Effects of Viscoelastic Surfactants on Corrosion.” 2017. Masters Thesis, Texas A&M University. Accessed February 19, 2020. http://hdl.handle.net/1969.1/165877.

MLA Handbook (7^th Edition):

Ng, Jun Hong Clarence. “Corrosion of C-95, N-80, S13Cr Metal at HP/HT Conditions and the Effects of Viscoelastic Surfactants on Corrosion.” 2017. Web. 19 Feb 2020.

Vancouver:

Ng JHC. Corrosion of C-95, N-80, S13Cr Metal at HP/HT Conditions and the Effects of Viscoelastic Surfactants on Corrosion. [Internet] [Masters thesis]. Texas A&M University; 2017. [cited 2020 Feb 19]. Available from: http://hdl.handle.net/1969.1/165877.

Council of Science Editors:

Ng JHC. Corrosion of C-95, N-80, S13Cr Metal at HP/HT Conditions and the Effects of Viscoelastic Surfactants on Corrosion. [Masters Thesis]. Texas A&M University; 2017. Available from: http://hdl.handle.net/1969.1/165877

University of New South Wales

20. Wei, Zengyi. Interfacial structures of polymeric surfactants in an emulsion formulation.

Degree: Chemical Engineering, 2019, University of New South Wales

URL: http://handle.unsw.edu.au/1959.4/62974

► As emulsions are thermodynamically unstable, stabilizers are added to prevent creaming and coalescence, and can greatly improve the customer appeal and shelf life of formulated… (more)

▼ As emulsions are thermodynamically unstable, stabilizers are added to prevent creaming and coalescence, and can greatly improve the customer appeal and shelf life of formulated products. Investigations of the structures of surfactants and polymers are key to understanding how they meditate the properties of the oil/water interface. Studying molecules at the oil/water interface is challenging, and only a handful of techniques are suitable for detailed structural studies of molecules at the oil/water interface. In this thesis, an easy-to-use sample environment suitable for oil/water interfacial characterization is described. End attached polydimethylsiloxane (PDMS) films mimic silicone layers in a way that permits the amounts and molecular structures of materials at the interface to be measured. Molecular conformations at the oil/water interface are seen to differ from those at the air/water and solid/liquid interfaces. Penetration of surfactant tails into the oil phase was observed. Addition of small hydrocarbon surfactants and salts was seen to affect polymeric surfactants. Displacement of the polymeric surfactants from the PDMS surface, producing poorly stabilized interfaces, was observed; co-adsorption behavior was also measured. The efficiency of steric stabilization could also be tuned by the addition of salts. A reduction in polymer adsorption and a thinner steric barrier were seen when salts were added as co-solutes. The effect was salt-identity specific. Adsorbed polymeric structures were also probed using neutron reflection in a sample environment that creates a confined geometry at the oil/water interface. Multilayer structures were formed under confinement and the polymeric surfactants were seen to be repelled from the hydrophobic surface. These are the first experiments on confinement at liquid/liquid interfaces ever attempted. Interfacial structures were seen to be highly dependent on the phases that were used, with these data from the PDMS/water interface indicating that it is difficult to draw direct conclusions from measurements at the air/water or solid/liquid interface. The PDMS brush layer is seen to be an excellent model oil surface and enables detailed structural studies of polymers and surfactants at the PDMS/water interface. Advisors/Committee Members: Prescott, Stuart, Chemical Engineering, Faculty of Engineering, UNSW.

Subjects/Keywords: Structure; Emulsion; Interface; Surfactant

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APA (6^th Edition):

Wei, Z. (2019). Interfacial structures of polymeric surfactants in an emulsion formulation. (Doctoral Dissertation). University of New South Wales. Retrieved from http://handle.unsw.edu.au/1959.4/62974

Chicago Manual of Style (16^th Edition):

Wei, Zengyi. “Interfacial structures of polymeric surfactants in an emulsion formulation.” 2019. Doctoral Dissertation, University of New South Wales. Accessed February 19, 2020. http://handle.unsw.edu.au/1959.4/62974.

MLA Handbook (7^th Edition):

Wei, Zengyi. “Interfacial structures of polymeric surfactants in an emulsion formulation.” 2019. Web. 19 Feb 2020.

Vancouver:

Wei Z. Interfacial structures of polymeric surfactants in an emulsion formulation. [Internet] [Doctoral dissertation]. University of New South Wales; 2019. [cited 2020 Feb 19]. Available from: http://handle.unsw.edu.au/1959.4/62974.

Council of Science Editors:

Wei Z. Interfacial structures of polymeric surfactants in an emulsion formulation. [Doctoral Dissertation]. University of New South Wales; 2019. Available from: http://handle.unsw.edu.au/1959.4/62974

University of Texas – Austin

21. Chen, Yunshen. Surfactant stabilization of CO₂-in-water foams at high temperatures.

Degree: PhD, Chemical Engineering, 2014, University of Texas – Austin

URL: http://hdl.handle.net/2152/26147

► The interfacial properties of a surfactant in a CO₂-aqueous system at a temperature above 100 °C, and how they influence foams are essentially unknown. A… (more)

▼ The interfacial properties of a surfactant in a CO₂-aqueous system at a temperature above 100 °C, and how they influence foams are essentially unknown. A cationic surfactant, C₁₂₋₁₄N(EO)₂ in the protonated state below pH 5.5, was demonstrated to be soluble in an aqueous phase with up to 22% total dissolved salt (TDS) at 120 °C. Moreover, the strong solvation in brine (high cloud point) and simultaneous affinity for CO₂ led to significant adsorption of the surfactant at the CO₂-water interface. Given that the surfactant favored the brine phase over the CO₂ phase, the preferred curvature was a CO₂-in-water (C/W) macroemulsion (foam). The surfactant stabilized foam in the presence of crushed calcium carbonate at ~ pH 4 upon suppressing the dissolution of calcium carbonate upon addition of Ca²⁺ and Mg²⁺ according to the common ion effect. Cationic alkyltrimethylammonium surfactants with an alkyl tail of average carbon number less than 15 were soluble in 22% TDS brine up to 120 °C. The head group was properly balanced with a C₁₂₋₁₄ hydrocarbon tail for a sufficiently dense surfactant layer at the CO₂-water interface to reduce the interfacial tension. For C₁₂₋₁₄N(CH₃)₃Cl the solubility in brine and the surfactant adsorption were sufficient to stabilize C/W foam at 120 °C in both a crushed calcium carbonate packed bed (76 Darcy) and a capillary tube at the downstream of the bed. The stability of the foam at high temperature may be attributed to the high surfactant adsorption at the interface. The use of nonionic surfactants as a foam stabilizer is usually limited by their poor aqueous solubility at elevated temperatures, particularly at high salinity. A nonionic surfactant C₁₂₋₁₄(EO)₂₂ with high degree of ethoxylation gave higher salt tolerance at elevated temperature. The surfactant stabilize C/W foam at 80 °C in the presence of 90 g/L NaCl brine in a 30 Darcy sand pack, which has not yet been reported by a nonionic surfactant. Both the formation of strong foam in the porous media and the low of oil-brine partition coefficient suggest C₁₂₋₁₄(EO)₂₂ is a potential candidate for a CO₂ EOR field trial. Advisors/Committee Members: Johnston, Keith P., 1955- (advisor).

Subjects/Keywords: Surfactant; CO₂; Foam; High temperature

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APA (6^th Edition):

Chen, Y. (2014). Surfactant stabilization of CO₂-in-water foams at high temperatures. (Doctoral Dissertation). University of Texas – Austin. Retrieved from http://hdl.handle.net/2152/26147

Chicago Manual of Style (16^th Edition):

Chen, Yunshen. “Surfactant stabilization of CO₂-in-water foams at high temperatures.” 2014. Doctoral Dissertation, University of Texas – Austin. Accessed February 19, 2020. http://hdl.handle.net/2152/26147.

MLA Handbook (7^th Edition):

Chen, Yunshen. “Surfactant stabilization of CO₂-in-water foams at high temperatures.” 2014. Web. 19 Feb 2020.

Vancouver:

Chen Y. Surfactant stabilization of CO₂-in-water foams at high temperatures. [Internet] [Doctoral dissertation]. University of Texas – Austin; 2014. [cited 2020 Feb 19]. Available from: http://hdl.handle.net/2152/26147.

Council of Science Editors:

Chen Y. Surfactant stabilization of CO₂-in-water foams at high temperatures. [Doctoral Dissertation]. University of Texas – Austin; 2014. Available from: http://hdl.handle.net/2152/26147

Dalhousie University

22. Jackson, Douglas. MODELING THE INFLUENCE OF SURFACTANT ARCHITECTURE ON THE CRITICAL MICELLE CONCENTRATION OF DOUBLE-HEADED AND GEMINI SURFACTANTS.

Degree: MS, Department of Chemistry, 2010, Dalhousie University

URL: http://hdl.handle.net/10222/12993

► Monte Carlo simulations have been used in the past to investigate a variety of surfactant systems; however, there is little published literature for double-headed and… (more)

Subjects/Keywords: GEMINI SURFACTANT; DOUBLE-HEADED SURFACTANT; MONTE CARLO SIMULATIONS

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APA (6^th Edition):

Jackson, D. (2010). MODELING THE INFLUENCE OF SURFACTANT ARCHITECTURE ON THE CRITICAL MICELLE CONCENTRATION OF DOUBLE-HEADED AND GEMINI SURFACTANTS. (Masters Thesis). Dalhousie University. Retrieved from http://hdl.handle.net/10222/12993

Chicago Manual of Style (16^th Edition):

Jackson, Douglas. “MODELING THE INFLUENCE OF SURFACTANT ARCHITECTURE ON THE CRITICAL MICELLE CONCENTRATION OF DOUBLE-HEADED AND GEMINI SURFACTANTS.” 2010. Masters Thesis, Dalhousie University. Accessed February 19, 2020. http://hdl.handle.net/10222/12993.

MLA Handbook (7^th Edition):

Jackson, Douglas. “MODELING THE INFLUENCE OF SURFACTANT ARCHITECTURE ON THE CRITICAL MICELLE CONCENTRATION OF DOUBLE-HEADED AND GEMINI SURFACTANTS.” 2010. Web. 19 Feb 2020.

Vancouver:

Jackson D. MODELING THE INFLUENCE OF SURFACTANT ARCHITECTURE ON THE CRITICAL MICELLE CONCENTRATION OF DOUBLE-HEADED AND GEMINI SURFACTANTS. [Internet] [Masters thesis]. Dalhousie University; 2010. [cited 2020 Feb 19]. Available from: http://hdl.handle.net/10222/12993.

Council of Science Editors:

Jackson D. MODELING THE INFLUENCE OF SURFACTANT ARCHITECTURE ON THE CRITICAL MICELLE CONCENTRATION OF DOUBLE-HEADED AND GEMINI SURFACTANTS. [Masters Thesis]. Dalhousie University; 2010. Available from: http://hdl.handle.net/10222/12993

23. Kumthekar, Kedar Ravindra. Studies in Mixed Surfactant Systems and Vegetable Oil Emulsions; -.

Degree: Chemistry, 2012, INFLIBNET

URL: http://shodhganga.inflibnet.ac.in/handle/10603/9496

►

The present thesis titled Studies in Mixed Surfactant Systems and Vegetable Oil Emulsions brings the natural goodness of unrefined edible and non-edible vegetable oils to… (more)

▼

The present thesis titled Studies in Mixed Surfactant Systems and Vegetable Oil Emulsions brings the natural goodness of unrefined edible and non-edible vegetable oils to the consumer via the emulsification science and technology. Vegetable oil is one of the extensively used natural commodity product used for variety of applications such as, food supplement, cosmetic, pharmaceutical and health care, fuel additives, lubricant and raw material for chemical as well as surfactant industry. In this research work vegetable oils such as almond, safflower, mustard, soyabean were emulsified in oil in water type emulsion and their rheological newlineproperties were investigated revealing pseudoplastic flow behavior. The influence of newlinerheological additive carboxy methyl cellulose-sodium salt on apparent viscosity of low fat almond oil in water emulsion was proposed by developing concentration and newlinetemperature dependent empirical equation. They have shown a better moisturizing newlinepotential and skin compatability. Low fat oil in water emulsions of almond and safflower has shown a better blood cholesterol lowering activity called as hypolepidemic activity. The combination of non-edible oil emulsions such as neem, karanj and castor has shown a better mosquito larvicidal potential against the single oil emulsion. We have developed environmentally benign, greener, milder amine free and highly selective protocol for chlorpyrifos and its ethyl, n-propyl and n-butyl derivatives using HLB attained blend of non-ionic surfactant in organic solvent/water newlinesystem. The novel kinetic model was developed for solid-liquid phase transfer catalyzed (S-L PTC) chlorpyrifos methyl synthesis using benzyl trimethyl ammonium chloride as a single and recyclable catalyst. A promising method for HPLC internal standard purity was developed successfully for monitoring the reaction progress as well as purity of the final product. The proposed kinetic model was validated by performing series of experiments.

References p. 197-209, Synopsis included

Advisors/Committee Members: Nagarkar, Jayashree M.

Subjects/Keywords: Chemistry; Vegetable Oil Emulsions; Mixed Surfactant Systems; Nonionic surfactant

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APA (6^th Edition):

Kumthekar, K. R. (2012). Studies in Mixed Surfactant Systems and Vegetable Oil Emulsions; -. (Thesis). INFLIBNET. Retrieved from http://shodhganga.inflibnet.ac.in/handle/10603/9496

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):

Kumthekar, Kedar Ravindra. “Studies in Mixed Surfactant Systems and Vegetable Oil Emulsions; -.” 2012. Thesis, INFLIBNET. Accessed February 19, 2020. http://shodhganga.inflibnet.ac.in/handle/10603/9496.

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

MLA Handbook (7^th Edition):

Kumthekar, Kedar Ravindra. “Studies in Mixed Surfactant Systems and Vegetable Oil Emulsions; -.” 2012. Web. 19 Feb 2020.

Vancouver:

Kumthekar KR. Studies in Mixed Surfactant Systems and Vegetable Oil Emulsions; -. [Internet] [Thesis]. INFLIBNET; 2012. [cited 2020 Feb 19]. Available from: http://shodhganga.inflibnet.ac.in/handle/10603/9496.

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

Council of Science Editors:

Kumthekar KR. Studies in Mixed Surfactant Systems and Vegetable Oil Emulsions; -. [Thesis]. INFLIBNET; 2012. Available from: http://shodhganga.inflibnet.ac.in/handle/10603/9496

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

Louisiana State University

24. Mwangi, Paulina Metili. An experimental study of surfactant enhanced waterflooding.

Degree: MS, Petroleum Engineering, 2010, Louisiana State University

URL: etd-11192010-103220 ; https://digitalcommons.lsu.edu/gradschool_theses/2021

► Surfactants have a variety of applications in the petroleum industry due to their remarkable ability to lower the oil-water interfacial tension and alter wettability. However,… (more)

▼ Surfactants have a variety of applications in the petroleum industry due to their remarkable ability to lower the oil-water interfacial tension and alter wettability. However, surfactant adsorption on rock surfaces has severely crippled this means of improving oil recovery due to the high cost associated with the large quantities of surfactant needed. A previous experimental study by Ayirala (2002) reported the development of mixed wettability using a nonionic surfactant. At this mixed-wet state he was able to recover about 94% of the original oil in place. The underlying motivation of this study was to achieve such high recoveries without using large quantities of surfactants. A new surfactant enhanced waterflood method is proposed as the means to accomplish this task. This improved waterflood method consists of soaking the area around the production or injection well with an optimally concentrated surfactant slug prior to conducting a waterflood. Four variations of this novel process were investigated. The first two variations examined two surfactant slug sizes (0.2PV and 0.3PV) soaked around the production well prior to conducting a waterflood. The third variation explored the idea of soaking the area around the injection well instead of the production well prior to a waterflood. After soaking the area around the production well with a surfactant slug, the fourth variation used a low concentration (LC) surfactant solution to flood the reservoir instead of water. The main objective of this study was to evaluate whether these proposed improved waterflood methods are technically feasible, and also determine their effectiveness when compared to a conventional waterflood. In addition, simple cost analysis calculations were carried out to show the economic feasibility of the proposed improved waterflood variations, especially when compared to a conventional waterflood. All the experiments utilized the same rock and fluid properties, as those used by Ayirala in his coreflood experiments. A surfactant (Tomadol™ 91-8) with similar properties and recovery to that used by Ayirala was used in this project. This project was divided in four sets of experiments. This study found that all four improved waterflooding variations were technically feasible, and were more effective in improving oil recovery than a conventional waterflood. In addition, the proposed improved waterflood variations accomplished the task of significantly improving oil recovery with small quantities of surfactant.

Subjects/Keywords: Waterflooding; Core cleaning; Surfactant slug soaking; Wettability; Improved waterflooding; Surfactant flooding

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APA (6^th Edition):

Mwangi, P. M. (2010). An experimental study of surfactant enhanced waterflooding. (Masters Thesis). Louisiana State University. Retrieved from etd-11192010-103220 ; https://digitalcommons.lsu.edu/gradschool_theses/2021

Chicago Manual of Style (16^th Edition):

Mwangi, Paulina Metili. “An experimental study of surfactant enhanced waterflooding.” 2010. Masters Thesis, Louisiana State University. Accessed February 19, 2020. etd-11192010-103220 ; https://digitalcommons.lsu.edu/gradschool_theses/2021.

MLA Handbook (7^th Edition):

Mwangi, Paulina Metili. “An experimental study of surfactant enhanced waterflooding.” 2010. Web. 19 Feb 2020.

Vancouver:

Mwangi PM. An experimental study of surfactant enhanced waterflooding. [Internet] [Masters thesis]. Louisiana State University; 2010. [cited 2020 Feb 19]. Available from: etd-11192010-103220 ; https://digitalcommons.lsu.edu/gradschool_theses/2021.

Council of Science Editors:

Mwangi PM. An experimental study of surfactant enhanced waterflooding. [Masters Thesis]. Louisiana State University; 2010. Available from: etd-11192010-103220 ; https://digitalcommons.lsu.edu/gradschool_theses/2021

University of Texas – Austin

25. Koparal, Gulcan. Surfactant retention analysis in Berea sandstones.

Degree: MSin Engineering, Petroleum Engineering, 2019, University of Texas – Austin

URL: http://dx.doi.org/10.26153/tsw/5396

► With the diminishing amount of oil has been produced through primary and secondary oil production methods, the need of chemical EOR techniques has become more… (more)

▼ With the diminishing amount of oil has been produced through primary and secondary oil production methods, the need of chemical EOR techniques has become more important. The objective of Chemical EOR is mobilizing the residual oil by using chemicals such as surfactants, polymers, alkalis, co-solvents. The main obstacle with Chemical EOR is the cost efficiency of the chemicals that profoundly depends on the amount of surfactants absorbed onto the rock surface and trapped in the porous medium of the rock matrix. In this research, decreasing the anionic surfactant retention was targeted without using alkalis in the presence/absence of oil. In Berea outcrop sandstones, anionic surfactants were used to reduce the IFT between oil and water, which results in the mobilization of residual oil. High molecular water-soluble polymers were used to mitigate the reservoir heterogeneity and provide the sweep efficiency. Advancements in CEOR have enabled cost effective usage of surfactants and polymers with the consistency of alkalis in both sandstones and carbonate rocks. However, in the existence of gypsum and anhydrite, the usage of alkalies can be even detrimental. Thus, alternative methods are necessary to the robustness of the CEOR processes. In this research, to obtain an ultra-low interfacial tension (IFT) between oil and aqueous phase, chemical formulations were developed with conventional and novel surfactants as combination of internal olefin sulfonate (IOS) co-surfactants and co-solvents. Prior to the corefloods, the performance of the formulations were tested systematically through phase behavior and aqueous stability tests with different combinations of surfactants and co-surfactants with different ratios and with several kinds of co-solvents such as IBA, phenol and TEGBE. Formulations with good phase behaviors were investigated further with corefloods with and without oil. For the experiments with low surfactant retention, the same formulations were tested by adding sodium polyacrylate (NaPA) to decrease the surfactant retention. With the formulations with high solubilization ratio, high residual oil recovery and low surfactant retention were obtained and with a small amount of NaPA, a favorable economic to the surfactant-polymer applications was gained in Berea sandstones at 40°C Advisors/Committee Members: Mohanty, Kishore Kumar (advisor), Pope, Gary A (committee member), Panthi, Krishna K (committee member).

Subjects/Keywords: Chemical EOR; Surfactant-polymer applications; Anionic surfactants; Surfactant retention; Surfactant adsorption; Berea sandstone; Low permeability sandstone

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APA (6^th Edition):

Koparal, G. (2019). Surfactant retention analysis in Berea sandstones. (Masters Thesis). University of Texas – Austin. Retrieved from http://dx.doi.org/10.26153/tsw/5396

Chicago Manual of Style (16^th Edition):

Koparal, Gulcan. “Surfactant retention analysis in Berea sandstones.” 2019. Masters Thesis, University of Texas – Austin. Accessed February 19, 2020. http://dx.doi.org/10.26153/tsw/5396.

MLA Handbook (7^th Edition):

Koparal, Gulcan. “Surfactant retention analysis in Berea sandstones.” 2019. Web. 19 Feb 2020.

Vancouver:

Koparal G. Surfactant retention analysis in Berea sandstones. [Internet] [Masters thesis]. University of Texas – Austin; 2019. [cited 2020 Feb 19]. Available from: http://dx.doi.org/10.26153/tsw/5396.

Council of Science Editors:

Koparal G. Surfactant retention analysis in Berea sandstones. [Masters Thesis]. University of Texas – Austin; 2019. Available from: http://dx.doi.org/10.26153/tsw/5396

26. Naveen Chandra. EFFECT OF SURFACTANT MICELLES ON THE KINETICS OF OXIDATION OF CARBOXYLIC ACIDS BY METAL IONS IN ACIDIC MEDIUM;.

Degree: 2014, Kumaun University

URL: http://shodhganga.inflibnet.ac.in/handle/10603/28011

newline

Advisors/Committee Members: KAndapal, N. D..

Subjects/Keywords: Chemistry; SURFACTANT MICELLES

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

APA (6^th Edition):

Chandra, N. (2014). EFFECT OF SURFACTANT MICELLES ON THE KINETICS OF OXIDATION OF CARBOXYLIC ACIDS BY METAL IONS IN ACIDIC MEDIUM;. (Thesis). Kumaun University. Retrieved from http://shodhganga.inflibnet.ac.in/handle/10603/28011

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):

Chandra, Naveen. “EFFECT OF SURFACTANT MICELLES ON THE KINETICS OF OXIDATION OF CARBOXYLIC ACIDS BY METAL IONS IN ACIDIC MEDIUM;.” 2014. Thesis, Kumaun University. Accessed February 19, 2020. http://shodhganga.inflibnet.ac.in/handle/10603/28011.

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

MLA Handbook (7^th Edition):

Chandra, Naveen. “EFFECT OF SURFACTANT MICELLES ON THE KINETICS OF OXIDATION OF CARBOXYLIC ACIDS BY METAL IONS IN ACIDIC MEDIUM;.” 2014. Web. 19 Feb 2020.

Vancouver:

Chandra N. EFFECT OF SURFACTANT MICELLES ON THE KINETICS OF OXIDATION OF CARBOXYLIC ACIDS BY METAL IONS IN ACIDIC MEDIUM;. [Internet] [Thesis]. Kumaun University; 2014. [cited 2020 Feb 19]. Available from: http://shodhganga.inflibnet.ac.in/handle/10603/28011.

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

Council of Science Editors:

Chandra N. EFFECT OF SURFACTANT MICELLES ON THE KINETICS OF OXIDATION OF CARBOXYLIC ACIDS BY METAL IONS IN ACIDIC MEDIUM;. [Thesis]. Kumaun University; 2014. Available from: http://shodhganga.inflibnet.ac.in/handle/10603/28011

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

27. Yaseen, zahid. Studies on drug surfactant and drug polymer interactions: implications in drug formulations; -.

Degree: Chemistry, 2012, Aligarh Muslim University

URL: http://shodhganga.inflibnet.ac.in/handle/10603/28463

Abstract available newline

Bibliography page is at the end of each chapter.

Advisors/Committee Members: Kabiruddin.

Subjects/Keywords: Polymer; Interactions; Surfactant

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

APA (6^th Edition):

Yaseen, z. (2012). Studies on drug surfactant and drug polymer interactions: implications in drug formulations; -. (Thesis). Aligarh Muslim University. Retrieved from http://shodhganga.inflibnet.ac.in/handle/10603/28463

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):

Yaseen, zahid. “Studies on drug surfactant and drug polymer interactions: implications in drug formulations; -.” 2012. Thesis, Aligarh Muslim University. Accessed February 19, 2020. http://shodhganga.inflibnet.ac.in/handle/10603/28463.

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

MLA Handbook (7^th Edition):

Yaseen, zahid. “Studies on drug surfactant and drug polymer interactions: implications in drug formulations; -.” 2012. Web. 19 Feb 2020.

Vancouver:

Yaseen z. Studies on drug surfactant and drug polymer interactions: implications in drug formulations; -. [Internet] [Thesis]. Aligarh Muslim University; 2012. [cited 2020 Feb 19]. Available from: http://shodhganga.inflibnet.ac.in/handle/10603/28463.

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

Council of Science Editors:

Yaseen z. Studies on drug surfactant and drug polymer interactions: implications in drug formulations; -. [Thesis]. Aligarh Muslim University; 2012. Available from: http://shodhganga.inflibnet.ac.in/handle/10603/28463

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

28. Desplat, Jean-Christophe. Monte Carlo simulations of amphiphilic systems.

Degree: PhD, 1996, Sheffield Hallam University

URL: http://shura.shu.ac.uk/19557/ ; http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.320304

► Results are presented from NVT Monte Carlo simulations of a three-dimensional lattice model of a binary mixture of solvent and surfactant chains in which free… (more)

▼ Results are presented from NVT Monte Carlo simulations of a three-dimensional lattice model of a binary mixture of solvent and surfactant chains in which free self assembly is allowed. It is demonstrated that the model exhibits a critical micelle concentration together with cluster size distributions consistent with experiment and theory (minimum and maximum in the distribution within the micellar region). The weight average aggregation number, N[w], increases linearly with the square root of the concentration of micellised surfactant as predicted theoretically. The dilute solution excess chemical potential (beta[0n] – beta[01]) is determined from the cluster size distribution. It is found to be a monotonically decreasing function of n with different functional forms for small and large clusters. A single analytical expression is found to describe the cluster size distribution and the X[1] versus X[a] curve on the concentration range from 0 to 5 vol. % . It is necessary to introduce an activity coefficient to accurately describe the behaviour of the model for amphiphile concentrations greater than 5 vol. % . The dependence of this expression on temperature and molecular interaction parameters is determined. Results are also presented for the simulation of longer chains. Following investigation of three of the models free parameters, regions of phase space in which 'spongy' structures and vesicles – either spherical or tubular – are successfully identified. A preliminary phase diagram is established by considering the variation in the cavity size distribution function. These results are discussed in relation with experimental data and existing phenomenological studies. An extension of the Configurational-bias Monte Carlo (CBMC) based on a self-avoiding walk using sites selected from subsets of sites known a priori available for the regrowth is also established. Its theoretical fondation is laid out together with a partial assessment of its efficiency relative to both the classic reptation and CBMC for the simulation of chains lying on a lattice of high coordination number. A methodology for the simulation of polyoxyethylene oxide (POE) surfactants using a cubic lattice of coordination number c = 26 is briefly discussed.

Subjects/Keywords: 530.41; Surfactant systems

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APA (6^th Edition):

Desplat, J. (1996). Monte Carlo simulations of amphiphilic systems. (Doctoral Dissertation). Sheffield Hallam University. Retrieved from http://shura.shu.ac.uk/19557/ ; http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.320304

Chicago Manual of Style (16^th Edition):

Desplat, Jean-Christophe. “Monte Carlo simulations of amphiphilic systems.” 1996. Doctoral Dissertation, Sheffield Hallam University. Accessed February 19, 2020. http://shura.shu.ac.uk/19557/ ; http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.320304.

MLA Handbook (7^th Edition):

Desplat, Jean-Christophe. “Monte Carlo simulations of amphiphilic systems.” 1996. Web. 19 Feb 2020.

Vancouver:

Desplat J. Monte Carlo simulations of amphiphilic systems. [Internet] [Doctoral dissertation]. Sheffield Hallam University; 1996. [cited 2020 Feb 19]. Available from: http://shura.shu.ac.uk/19557/ ; http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.320304.

Council of Science Editors:

Desplat J. Monte Carlo simulations of amphiphilic systems. [Doctoral Dissertation]. Sheffield Hallam University; 1996. Available from: http://shura.shu.ac.uk/19557/ ; http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.320304

29. Chavda, Sureshkumar L. Surfactant solutions: their characeterization by physicochemical and instrumental methods; -.

Degree: Chemistry, 2011, Veer Narmad South Gujarat University

URL: http://shodhganga.inflibnet.ac.in/handle/10603/45727

None

Publication p.172p.

Advisors/Committee Members: Bahadur, P.

Subjects/Keywords: Methods; Solutions; Surfactant

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

APA (6^th Edition):

Chavda, S. L. (2011). Surfactant solutions: their characeterization by physicochemical and instrumental methods; -. (Thesis). Veer Narmad South Gujarat University. Retrieved from http://shodhganga.inflibnet.ac.in/handle/10603/45727

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):

Chavda, Sureshkumar L. “Surfactant solutions: their characeterization by physicochemical and instrumental methods; -.” 2011. Thesis, Veer Narmad South Gujarat University. Accessed February 19, 2020. http://shodhganga.inflibnet.ac.in/handle/10603/45727.

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

MLA Handbook (7^th Edition):

Chavda, Sureshkumar L. “Surfactant solutions: their characeterization by physicochemical and instrumental methods; -.” 2011. Web. 19 Feb 2020.

Vancouver:

Chavda SL. Surfactant solutions: their characeterization by physicochemical and instrumental methods; -. [Internet] [Thesis]. Veer Narmad South Gujarat University; 2011. [cited 2020 Feb 19]. Available from: http://shodhganga.inflibnet.ac.in/handle/10603/45727.

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

Council of Science Editors:

Chavda SL. Surfactant solutions: their characeterization by physicochemical and instrumental methods; -. [Thesis]. Veer Narmad South Gujarat University; 2011. Available from: http://shodhganga.inflibnet.ac.in/handle/10603/45727

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

University of Alberta

30. Fournier, Geraldine A A. Determination of Critical Aggregation Phenomena using Raman Spectroscopy.

Degree: MS, Department of Chemical and Materials Engineering, 2016, University of Alberta

URL: https://era.library.ualberta.ca/files/c7s75dc409

► The tendency of asphaltenes to aggregate in crude oil is observed at SATP and is enhanced at elevated temperatures. At these conditions, asphaltenes aggregation is… (more)

▼ The tendency of asphaltenes to aggregate in crude oil is observed at SATP and is enhanced at elevated temperatures. At these conditions, asphaltenes aggregation is a problem as it will ultimately lead to mesophase formation, a precursor of coke, known for causing plugging and fouling of pipelines and other equipment in refineries. It is becoming crucial to develop new technics using on-line sensors for characterization of heavy oil components in order to predict the onset of aggregation and prevent those shut downs. Previous studies have been done to determine the early stages of asphaltene aggregation, also called CNAC, in organic solvents using absorbance, fluorescence spectrometry, calorimetric titration or thermo-optical diffusivity. The ultimate goal of this work is to develop an in situ technique that is able to track aggregation at reaction conditions by using Raman spectroscopy, even though no structural information is available. This thesis describes the foundations of the in situ technique at ambient conditions. Aggregation of strongly associating model compounds such as surfactants was first investigated with Raman spectroscopy using a 785 nm laser. Intensity ratios as a function of the surfactant concentration showed progressive transitions which were interpreted as indicators of the critical micelle concentration. The good agreement with the literature encouraged the continued development of this method as an analytical tool to study the aggregation phenomena of highly complex associating compounds such as vacuum residue. Raman spectra of Athabasca VR solutions in toluene were observed in the concentration range between 0.1 wt. % and 0.0005 wt. % at room temperature and atmospheric pressure. Specific intensity ratios plotted versus the vacuum residue concentration showed a breakpoint around 0.006 wt. %. Such values were in agreement with the CNAC reported in previous articles. Therefore, Raman spectroscopy stands as an effective tool to detect and give reliable quantitative data for physical phenomena such as micellization and particles aggregation.

Subjects/Keywords: micellization; Raman spectroscopy; asphaltenes; self-association; surfactant

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

APA (6^th Edition):

Fournier, G. A. A. (2016). Determination of Critical Aggregation Phenomena using Raman Spectroscopy. (Masters Thesis). University of Alberta. Retrieved from https://era.library.ualberta.ca/files/c7s75dc409

Chicago Manual of Style (16^th Edition):

Fournier, Geraldine A A. “Determination of Critical Aggregation Phenomena using Raman Spectroscopy.” 2016. Masters Thesis, University of Alberta. Accessed February 19, 2020. https://era.library.ualberta.ca/files/c7s75dc409.

MLA Handbook (7^th Edition):

Fournier, Geraldine A A. “Determination of Critical Aggregation Phenomena using Raman Spectroscopy.” 2016. Web. 19 Feb 2020.

Vancouver:

Fournier GAA. Determination of Critical Aggregation Phenomena using Raman Spectroscopy. [Internet] [Masters thesis]. University of Alberta; 2016. [cited 2020 Feb 19]. Available from: https://era.library.ualberta.ca/files/c7s75dc409.

Council of Science Editors:

Fournier GAA. Determination of Critical Aggregation Phenomena using Raman Spectroscopy. [Masters Thesis]. University of Alberta; 2016. Available from: https://era.library.ualberta.ca/files/c7s75dc409

Open Access Theses and Dissertations