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You searched for subject:(N butylbenzene). Showing records 1 – 3 of 3 total matches.

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1. Machado, Douglas Silva. Estudo do comportamento de sistemas hidrotrópicos.

Degree: PhD, Físico-Química, 2012, University of São Paulo

Neste trabalho estudou-se o comportamento de soluções dos hidrótropos toluenossulfonato de sódio (TSS) e n-butilbenzeno sulfonato de sódio (NBBSNa) quanto a suas características de agregação/associação por Ressonância Magnética Nuclear 1H (RMN 1H), espalhamento de raios-X à baixo ângulo (SAXS), espalhamento de luz estático (SLS) e espalhamento de luz a médios ângulos (WAXS). Medidas realizadas com outros hidrótropos tais como estirenossulfonato de sódio (ESS), salicilato de sódio (SalS) e benzoato de sódio (BS) foram realizadas para comparação dos resultados. O NBBSNa foi sintetizado, purificado e caracterizado. Os experimentos de RMN revelam mudanças no deslocamento químico com a concentração, indicando mudança de ambiente a que as moléculas estão submetidas. Pela técnica de SLS pode-se avaliar o segundo coeficiente do virial das soluções de TSS com e sem a adição de um soluto. Pelas análises de SAXS determinou-se o tamanho do agregado de NBBSNa utilizando ajustes pelo programa SASfit, sendo o resultado comparado com um surfactante clássico dodecilbenzenossulfonato de sódio (DBSNa). O NBBSNa é um sistema de três densidades eletrônicas e esférico. Os demais hidrótropos estudados apresentam comportamento de líquido, sendo observado a correlação das moléculas a curta distância nos experimentos de WAXS.

In this work the behavior of solutions of the hydrotropes sodium toluene sulfonate (TSS) and sodium n-butylbenzene sulfonate (NBBSNa) was studied, concerning the aggregation/association characteristics of this molecules by the use of Nuclear Magnetic Resonance (NMR 1H), small angle x ray scattering (SAXS), static light scattering (SLS) and wide angle x ray scattering (WAXS). Measurements with other hydrotropic molecules like sodium styrene sulfonate (ESS), sodium salicylate (SalS), sodium benzoate (BS) were realized in order to discuss the results. The NBBSNa molecule was synthesized, purified and characterized. The experiments of NMR revealed changes in the chemical shift with the concentration, indicating the changes of the surround environment in what molecules are embedded. For the technique of SLS, the second virial coefficient of the solutions of TSS could be evaluated with and without the addition of a solute. By the SAXS data the size of the aggregate of NBBSNa was determined using the SASfit software. The result was compared with a classic surfactant sodium dodecylbenzene sulfonate (DBSNa). NBBSNa is a spherical system of three electronic densities. All the other hydrotropes studied shows a liquid scattering behavior. By WAXS experiments a correlation of the molecules at short distance was observed.

Advisors/Committee Members: Neumann, Miguel Guillermo.

Subjects/Keywords: aggregation; agregação; hidrótropos; hydrotropes; n-butilbenzenossulfonato de sódio; SAXS; SAXS; sodium n-butylbenzene sulfonate

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APA (6th Edition):

Machado, D. S. (2012). Estudo do comportamento de sistemas hidrotrópicos. (Doctoral Dissertation). University of São Paulo. Retrieved from http://www.teses.usp.br/teses/disponiveis/75/75134/tde-25072012-085958/ ;

Chicago Manual of Style (16th Edition):

Machado, Douglas Silva. “Estudo do comportamento de sistemas hidrotrópicos.” 2012. Doctoral Dissertation, University of São Paulo. Accessed August 10, 2020. http://www.teses.usp.br/teses/disponiveis/75/75134/tde-25072012-085958/ ;.

MLA Handbook (7th Edition):

Machado, Douglas Silva. “Estudo do comportamento de sistemas hidrotrópicos.” 2012. Web. 10 Aug 2020.

Vancouver:

Machado DS. Estudo do comportamento de sistemas hidrotrópicos. [Internet] [Doctoral dissertation]. University of São Paulo; 2012. [cited 2020 Aug 10]. Available from: http://www.teses.usp.br/teses/disponiveis/75/75134/tde-25072012-085958/ ;.

Council of Science Editors:

Machado DS. Estudo do comportamento de sistemas hidrotrópicos. [Doctoral Dissertation]. University of São Paulo; 2012. Available from: http://www.teses.usp.br/teses/disponiveis/75/75134/tde-25072012-085958/ ;


Ohio University

2. Laskay, Ünige A. Dynamic Collision Induced Dissociation - A Novel Fragmentation Method in the Quadrupole Ion Trap.

Degree: PhD, Chemistry and Biochemistry (Arts and Sciences), 2009, Ohio University

The development of dynamic collision induced dissociation (DCID), a novel collisional activation method for quadrupole ion traps (QITs) is described. The effect of experimental parameters such as the excitation frequency, excitation amplitude and mass scanning rate were investigated, as well as the effect of frequency spacing and relative phase angle when a two-frequency excitation waveform is used. With careful selection of the excitation conditions the internal energy deposition was significantly increased when compared to conventional collision induced dissociation (CID). While the maximum ratio of 91/92 reported in the literature for n-butylbenzene, a test molecule, using CID in a QIT is 4.2 (corresponding to ~5 eV internal energy), DCID can achieve ratios of 91/92 as large as 15. DCID fragmentation efficiencies in excess of 60% were achieved for n-butylbenzene and simultaneously efficient and energetic fragmentation may be attained with judicious selection of the DCID waveform. Upon investigation of excitation at the O - ¿ higher order resonance of the fundamental secular frequency of motion of the precursor ion, large internal energy depositions were possible with a greater flexibility in the selection of experimental parameters. Application of a high amplitude, two-frequency excitation waveform where the two frequencies were spaced at more than 5 kHz resulted in 91/92 fragment ion ratios of n-butylbenzene greater than 3 with concomitant fragmentation efficiencies in excess of 20%. This implies that the internal energy deposited to n-butylbenzene was in excess of 5 eV, which is considerably larger than is generally achievable with conventional CID. The application of DCID in a pulsed fashion (PqDCID) followed by a fast lowering of the rf amplitude on the ring electrode allowed for mass analysis of low mass product ions. PqDCID was applied to the on-line investigation of tryptic peptides eluting from an HPLC column. PqDCID was successful in accomplishing tandem mass analysis and provided an increased number of peaks in the mass spectrum compared to CID. The ability to analyze low mass product ions such as iTRAQ reporter ions was shown to be applicable for quantitative analysis of iTRAQ-labeled peptides. Advisors/Committee Members: Jackson, Glen P. (Advisor).

Subjects/Keywords: Analytical Chemistry; quadrupole ion trap; dynamic collision induced dissociation; N-butylbenzene; iTRAQ

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APA (6th Edition):

Laskay, . A. (2009). Dynamic Collision Induced Dissociation - A Novel Fragmentation Method in the Quadrupole Ion Trap. (Doctoral Dissertation). Ohio University. Retrieved from http://rave.ohiolink.edu/etdc/view?acc_num=ohiou1230577624

Chicago Manual of Style (16th Edition):

Laskay, Ünige A. “Dynamic Collision Induced Dissociation - A Novel Fragmentation Method in the Quadrupole Ion Trap.” 2009. Doctoral Dissertation, Ohio University. Accessed August 10, 2020. http://rave.ohiolink.edu/etdc/view?acc_num=ohiou1230577624.

MLA Handbook (7th Edition):

Laskay, Ünige A. “Dynamic Collision Induced Dissociation - A Novel Fragmentation Method in the Quadrupole Ion Trap.” 2009. Web. 10 Aug 2020.

Vancouver:

Laskay A. Dynamic Collision Induced Dissociation - A Novel Fragmentation Method in the Quadrupole Ion Trap. [Internet] [Doctoral dissertation]. Ohio University; 2009. [cited 2020 Aug 10]. Available from: http://rave.ohiolink.edu/etdc/view?acc_num=ohiou1230577624.

Council of Science Editors:

Laskay A. Dynamic Collision Induced Dissociation - A Novel Fragmentation Method in the Quadrupole Ion Trap. [Doctoral Dissertation]. Ohio University; 2009. Available from: http://rave.ohiolink.edu/etdc/view?acc_num=ohiou1230577624

3. Pousse, Émir. Étude cinétique de la combustion en flamme prémélangée de molécules modèles présentes dans les gazoles : Kinetic combustion studies of surrogate diesel fuel molecules in premixed flames.

Degree: Docteur es, Génie des procédés et des produits, 2009, Lorraine INP

Le moteur HCCI pourrait être une alternative intéressante aux procédés de combustion conventionnels. Néanmoins, le contrôle de la combustion reste difficile dans ce moteur car, contrairement au moteur essence et Diesel, celui-ci est directement contrôlé par la chimie d’oxydation du combustible. Une connaissance très précise des modèles cinétiques détaillés de l’oxydation du carburant est donc indispensable pour pouvoir contrôler ce mode de combustion. L’objectif de cette thèse était de développer et valider expérimentalement des modèles cinétiques d’oxydation à haute température de 3 molécules modèles du gazole en utilisant un brûleur à flamme plate laminaire comme dispositif expérimental. Cette étude présente de nouveaux résultats expérimentaux obtenus sur une flamme laminaire pauvre pré mélangée de méthane ensemencée respectivement avec du n butylbenzène, du n propylcyclohexane et de l’indane. Un modèle cinétique d’oxydation a été développé et validé à haute température pour le n butylbenzène et un autre a été validé en flamme pour le n propylcyclohexane. Dans l’ensemble, ces modèles ont permis de simuler correctement les profils de la plupart des produits mesurés en flamme. Par ailleurs, un modèle cinétique qualitatif d’oxydation pour l’indane a été proposé

The HCCI engine could be an interesting alternative to conventional combustion processes. However, the control of the combustion remains difficult in this engine because, unlike the gasoline and diesel engine, it is directly related to the chemical oxidation of fuel. The development of accurate detailed kinetic models of the oxidation of fuel is therefore essential to control this mode of combustion. The aim of this PhD was to develop and experimentally validate high temperature kinetic oxidation models for 3 molecules representative of diesel fuel by using a flat flame burner experimental device. This study presents new experimental results obtained in a lean laminar premixed methane flame seeded respectively with n butylbenzene, n propylcyclohexane and indane. A kinetic oxidation model was developed and validated at high temperature for n-butylbenzene and another one was validated in flame for n propylcyclohexane. Overall, the models correctly simulated the profiles of most products measured in the flames. Moreover, a qualitative kinetic model for the oxidation of indane has been proposed

Advisors/Committee Members: Battin-Leclerc, Frédérique (thesis director), Glaude, Pierre-Alexandre (thesis director).

Subjects/Keywords: Flamme laminaire de pré-mélange; Moteur HCCI; Carburant Diesel; Modèle cinétique; Indane; N propylcyclohexane; N butylbenzène; Méthane; Oxydation; Combustion; Premixed laminar flame; HCCI engine; Diesel fuel; Indane; Combustion; Oxidation; Methane; N-butylbenzene; N propylcyclohexane; Kinetic model

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

APA (6th Edition):

Pousse, . (2009). Étude cinétique de la combustion en flamme prémélangée de molécules modèles présentes dans les gazoles : Kinetic combustion studies of surrogate diesel fuel molecules in premixed flames. (Doctoral Dissertation). Lorraine INP. Retrieved from http://www.theses.fr/2009INPL002N

Chicago Manual of Style (16th Edition):

Pousse, Émir. “Étude cinétique de la combustion en flamme prémélangée de molécules modèles présentes dans les gazoles : Kinetic combustion studies of surrogate diesel fuel molecules in premixed flames.” 2009. Doctoral Dissertation, Lorraine INP. Accessed August 10, 2020. http://www.theses.fr/2009INPL002N.

MLA Handbook (7th Edition):

Pousse, Émir. “Étude cinétique de la combustion en flamme prémélangée de molécules modèles présentes dans les gazoles : Kinetic combustion studies of surrogate diesel fuel molecules in premixed flames.” 2009. Web. 10 Aug 2020.

Vancouver:

Pousse . Étude cinétique de la combustion en flamme prémélangée de molécules modèles présentes dans les gazoles : Kinetic combustion studies of surrogate diesel fuel molecules in premixed flames. [Internet] [Doctoral dissertation]. Lorraine INP; 2009. [cited 2020 Aug 10]. Available from: http://www.theses.fr/2009INPL002N.

Council of Science Editors:

Pousse . Étude cinétique de la combustion en flamme prémélangée de molécules modèles présentes dans les gazoles : Kinetic combustion studies of surrogate diesel fuel molecules in premixed flames. [Doctoral Dissertation]. Lorraine INP; 2009. Available from: http://www.theses.fr/2009INPL002N

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