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Dissertations / Theses on the topic 'Sodium bromide'

Author: Grafiati

Published: 5 June 2025

Last updated: 1 August 2025

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1

Mušková, Alexandra. "Příprava a charakterizace katanionických komplexů." Master's thesis, Vysoké učení technické v Brně. Fakulta chemická, 2020. http://www.nusl.cz/ntk/nusl-414179.

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The diploma thesis deals with the preparation and characterization of catanionic complexes and their possible application to pharmaceutics and medicine. The catanionic complexes were prepared by mixing two oppositely charged surfactants with the concentration of 20 mmol·dm3 in various volume ratios. Two systems were analyzed – CTAB + SDS and Septonex + SDS. Both systems were prepared in an aqueous and physiological environment. The turbidimetric analyses provided results of the intensity of turbidity of the prepared mixtures. The size and stability of the prepared particles were determined by

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2

Holubová, Anna. "Difúze organických molekul v hydrogelovém prostředí." Master's thesis, Vysoké učení technické v Brně. Fakulta chemická, 2017. http://www.nusl.cz/ntk/nusl-316187.

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This diploma thesis deals with study of hydrogels formed by phase separation of hyaluronan with oppositely charged surfactants cetyltrimethylammonium bromide (CTAB) and Septonex. It follows the bachelor thesis and extends the knowledge about the detailed characterisation of the inner environment of the hydrogel by determining the diffusion behaviour of the fluorescent probes Atto 488 and Nile Red using fluorescence correlation spectroscopy (FCS) technique and its modified version dual-focus fluorescence correlation spectroscopy (2f-FCS). Compared results showed that both methods show similar v

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3

Mondek, Jakub. "Časově rozlišená fluorescence systémů polymer-tenzid." Master's thesis, Vysoké učení technické v Brně. Fakulta chemická, 2012. http://www.nusl.cz/ntk/nusl-216815.

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In this diploma thesis was studied time-resolved fluorescence in polymer-surfactant system. At first aggregation numbers of cationic (cetyltrimethylammonium bromide), anionic (sodium dodecylsulfate) and nonionic (Triton X-100) surfactants were studied by steady-state and time-resolved fluorescence spectroscopy. These two methods were compared. Aggregation numbers by steady-state method were always lower than aggregation numbers measured by time-resolved method. Steady-state method of determination aggregation numbers is useless for surfactants with high aggregation number and for aerated sampl

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4

Repová, Romana. "Studium interakce záporně nabitých vezikulárních systémů s polykationty." Master's thesis, Vysoké učení technické v Brně. Fakulta chemická, 2020. http://www.nusl.cz/ntk/nusl-414178.

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This diploma thesis deals with the preparation and characterization of negatively charged catanionic vesicular systems and their combination with selected polycations. The catanionic vesicular system was prepared by mixing of two oppositely charged surfactants SDS and CTAB. The negative charge as well as the stability of the vesicular system was provided by the incorporation of phosphatidic acid. Polycations, DEAE and TMC, have been selected for use in a pharmaceutical applications. Characterization of the prepared systems was performed by measuring DLS and ELS. The results indicate that we we

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5

Awan, Faisal Ur Rahman. "Electrokinetic investigation of coal fines in fractured and porous media." Thesis, Edith Cowan University, Research Online, Perth, Western Australia, 2022. https://ro.ecu.edu.au/theses/2523.

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Coal seams are unconventional subsurface formations that host methane and are weaker (relative to conventional subsurface) formations. Coal seams are prone to coal fines generation within the fractured porous space throughout the life of the reservoir. These coal fines damage the permeability, deliverability and productivity of coal seams. Furthermore, the coal fines mobility/blockage in the hydraulically induced fractures and proppant packs negatively impacts the proppant conductivity. In this work, a comprehensive study has been conducted to augment the understanding of coal fines and their

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6

OLIVEIRA, LAURA C. de. "Estudo da distribuição de íons e metais em sangue via metodologia nuclear." reponame:Repositório Institucional do IPEN, 2008. http://repositorio.ipen.br:8080/xmlui/handle/123456789/11609.

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Made available in DSpace on 2014-10-09T12:53:49Z (GMT). No. of bitstreams: 0<br>Made available in DSpace on 2014-10-09T13:58:49Z (GMT). No. of bitstreams: 0<br>Tese (Doutoramento)<br>IPEN/T<br>Instituto de Pesquisas Energéticas e Nucleares - IPEN-CNEN/SP

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7

Alvarenga, Sandra Torres. "Síntese de acetatos de glicerina utilizando sais de bismuto." reponame:Repositório Institucional da UFBA, 2011. http://www.repositorio.ufba.br/ri/handle/ri/10931.

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118 f.<br>Submitted by Ana Hilda Fonseca (anahilda@ufba.br) on 2013-04-11T17:50:31Z No. of bitstreams: 1 Dissertação de Mestrado - PDF[1].pdf: 2378495 bytes, checksum: 988193a81cd9a137da1f1458daa95968 (MD5)<br>Approved for entry into archive by Ana Hilda Fonseca(anahilda@ufba.br) on 2013-05-14T17:22:34Z (GMT) No. of bitstreams: 1 Dissertação de Mestrado - PDF[1].pdf: 2378495 bytes, checksum: 988193a81cd9a137da1f1458daa95968 (MD5)<br>Made available in DSpace on 2013-05-14T17:22:34Z (GMT). No. of bitstreams: 1 Dissertação de Mestrado - PDF[1].pdf: 2378495 bytes, checksum: 988193a81cd9a137da1f145

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8

Burešová, Natálie. "Studium kvality hydrofobních domén ve fázově separovaných hydrogelech." Master's thesis, Vysoké učení technické v Brně. Fakulta chemická, 2018. http://www.nusl.cz/ntk/nusl-376810.

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The thesis deals with the study of hydrophobic domains in phase separated hydrogels. Two types of polyelectrolytes (hyaluronan, dextran) and oppositely charged surfactants (carbethopendecinium bromide, sodium dodecylsulphate ) are used. Phase separated hydrogels are formed by electrostatic interactions. The target of the thesis is to study the polarity of environment in phase separated hydrogeles by fluorescence spectroscopy. Fluorescence measurements is performed by using pyrene, Nile red and laurdane as fluorescence probes. All probes are sensitive to the polarity of the environment. The res

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9

FONTES, ERIC H. "Oxidação eletroquímica do etanol utilizando eletrocatalisadores PtRh/C em meio alcalino e sintetizados via borohidreto de sódio e redução por álcool." reponame:Repositório Institucional do IPEN, 2017. http://repositorio.ipen.br:8080/xmlui/handle/123456789/28013.

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Submitted by Pedro Silva Filho (pfsilva@ipen.br) on 2017-11-16T17:36:39Z No. of bitstreams: 0<br>Made available in DSpace on 2017-11-16T17:36:39Z (GMT). No. of bitstreams: 0<br>Os eletrocatalisadores PtRh/C foram preparados nas seguintes proporções atômicas: (100,0), (0,100), (90,10), (70,30) e (50,50). Os métodos empregados nas sínteses foram redução via borohidreto de sódio e redução por álcool. Os sais metálicos empregados foram H2PtCl6.6H2O e (RhNO3)3 e o suporte de carbono utilizado foi carbon Vulcan XC72, a composição metálica em massa foi de 20%; e o suporte, 80%. Os eletrocatalisadores

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10

Pisarenko, Aleksey N. "Analytical Measurements and Predictions of Perchlorate Ion Concentration in Sodium Hypochlorite Solutions and Drinking Water: Kinetics of Perchlorate Ion Formation and Effects of Associated Contaminants." Oxford, Ohio : Miami University, 2009. http://rave.ohiolink.edu/etdc/view?acc%5Fnum=miami1258154594.

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11

Kuehm-Caubère, Catherine. "Synthèses d'antioxydants indoliques : 1) synthèse d'indoles par cyclisations aryniques intramoléculaires; 2) réactivité des 5-methoxyindoles vis-à-vis des couples alx#3rsh." Nancy 1, 1994. http://www.theses.fr/1994NAN10110.

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Une nouvelle synthèse de dérivés indoliques a été mise au point basée sur le concept de la cyclisation arynique intramoléculaire d'imines ou d'enamines aromatiques halogénées au moyen de la base complexe nanh#2tbuona. Ces composés présentent des propriétés pharmacologiques intéressantes, tout particulièrement dans le domaine des antioxydants. Une large gamme d'indoles fonctionnalisés ou fonctionnalisables a pu être ainsi synthétisée à partir de matières premières simples et peu onéreuses diversement substituées. Une méthode un seul ballon a été mise au point et a permis d'obtenir des indoles n

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12

Bennis, Khalil. "Etude de l'adsorption et de la reduction electrochimique sur electrode de mercure de quelques cetones en presence de tensio-actifs en milieu aqueux." Clermont-Ferrand 2, 1988. http://www.theses.fr/1988CLF2E406.

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Etude de la reduction electrochimique de l'acetophenone, l'oxyde de mesityle et l'ethylideneacetone en milieu aqueux en presence d'agents de surface anioniques (laurylsulfate de sodium), d'agents de surface cationiques (bromure de benzyltrimethylammonium et bromure de cetyltrimethylammonium) et d'agents de surface non ioniques (brij 35 et poly(oxyethylene))

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13

Vinaraphong, Pravina. "Elution of adsorbed proteins at hydrophobic and hydrophilic surfaces by dodecyltrimethylammonium bromide and sodium dodecyls sulfate." Thesis, 1995. http://hdl.handle.net/1957/25993.

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Adsorption kinetic data recorded for α-lactalbumin, β-casein, β-lactoglobulin, bovine serum albumin and lysozyme at silianized silica surfaces of low and high hydrophobicity, along with a simple model for adsorption and surfactant-mediated elution of protein, were used to analyze the removal of each protein by sodium dodecylsulfate (SDS) and dodecyltrimethylammonium bromide (DTAB) at each surface. The model relates resistance to surfactant elution to two rate constants: one governing conversion of removable protein to a nonremovable form (s₁), and one governing removal of protein by the surfac

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14

Wang, Der-Her, and 王德和. "Tri-Liquid-Phase Phase Transfer Catalysis --- Effects of Sodium Hydroxide and Salts on the Formation of Third Liquid Phase and the Reaction between N-Butyl Bromide and Sodium Phenolate." Thesis, 1995. http://ndltd.ncl.edu.tw/handle/14794816049512632804.

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博士<br>國立成功大學<br>化學工程研究所<br>83<br>In a preliminary study on the reaction between benzyl chloride (BzCl) and sodium bromide with tetrabutylammonium bromide (Bu4 NBr) as a phase transfer catalyst, we found that a third liquid phase with rich catalyst appeared and the reaction rate constant increased sharply when the amount of Bu4NBr or NaBr exceeded a critical value. The catalyst in such a tri-liquid- phase catalysis (TLPC) system can be recovered and recycled from the reaction system as easi

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15

Hsu, Chung-Wei, and 徐君偉. "Liquid-Solid Reaction Catalyzed by the Liquid Containing Rich Phase Transfer Catalyst-Synthesis of Acetic Acid Hexyl Ester from n-Hexyl Bromide and Sodium Acetate." Thesis, 2004. http://ndltd.ncl.edu.tw/handle/78f47h.

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碩士<br>國立成功大學<br>化學工程學系碩博士班<br>92<br>This research is a novel alternate phase transfer catalysis method , that is a catalyst-rich-phase adds to the solid sodium acetate and organic reactant (hexyl bromide) which forms solid-liquid phase transfer catalysis become to solid-liquid-liquid phase transfer catalysis. Use this system to catalyze hexyl bromide and sodium acetate to hexyl acetate. This method can improve the catalyst retrieved difficult in liquid-liquid, solid-liquid phase transfer catalysis and carboxyl ion reactive reduce by hydration effect in liquid-liquid phase transfer catalysis. T

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16

王鵬為. "The Formation of a Third Liquid Phase and the Phase Transfer Catalytic Reaction between N-Butyl Bromide and Sodium Phenolate Using Symmetric Quaternary Ammonium Salts as the Catalysts." Thesis, 1997. http://ndltd.ncl.edu.tw/handle/81476356522687945365.

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碩士<br>國立成功大學<br>化學工程研究所<br>85<br>This study amied at the formation of a third liquid phase and the reaction kinetics in the third liquid phase formed in the systems of toluene/R4NBr/(NaOPh+NaOH) aqueous solution. By a series of experiments, we have found that all symmetric quaternary ammonium bromides, except for Et4NBr, can form a third liquid phase. These symmetric quaternary ammonium salts can be classified into two types, hydrophilic and hydrophobic (lipophilic). In the system containing a hydrophihc salt, the third liquid phase was formed by salting-out effect with adding NaOH. Not

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17

Wang, Chu-Ming, and 王志民. "Tri-Liquid-Phase Phase Transfer Catalysis－Optimal Operating Conditions for Synthesizing N-Butyl Phenyl Ether from N-Butyl Bromide and Sodium Phenolate in Batch and Continuous-Flow Reactors." Thesis, 1996. http://ndltd.ncl.edu.tw/handle/42064457713580795497.

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碩士<br>國立成功大學<br>化學工程學系<br>84<br>ABTRACT In a previous study in our laboratory on the reaction between n-butyl bromide (BuBr) and sodium phenolate (NaOPh) with tetrabutylammonium bromide (QBr) as a phase transfer catalyst,we found that a third liquid phase appeared when the aqueous and organic phases with poor catalyst. The reaction rate in such a tri-liquid-phase phase transfer catalysis is faster than the bi-liquid-phase system,and the catalyst can be easily recovered and reused.In this w

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18

Ling, Chen Mei, and 陳美玲. "Studies on Three-liquid-phase Phase Transfer Catalysis— Synthesis of n-Butyl Phenyl Ether from n-Butyl Bromide and Sodium Phenolate with n-Hexane as the Solvent of Organic Phase." Thesis, 1993. http://ndltd.ncl.edu.tw/handle/17911021604377262367.

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碩士<br>國立成功大學<br>化學工程研究所<br>81<br>In a preliminary study in our laboratory on the reaction between n-butyl bromide and sodium phenolate catalyzed by tetrabutyl ammonium bromide to prepare n-butyl phenyl ether, we found that a third liquid phase appeared apparently when we used polar chemicals, such as n-hexane and cyclohexane, as the solvent for organic reactant.In order to observe the formation condition of the third liquid phase and to elucidate the role it plays on the reaction, we carrie

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19

Ramaswamy, Divya. "Effect of surfactants on methane hydrate formation and dissociation." Thesis, 2011. http://hdl.handle.net/2152/ETD-UT-2011-05-2880.

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Dissociation of gas hydrates has been the primary concern of the oil and gas industry for flow assurance, mainly in an offshore environment. There is also a growing interest in the rapid formation of gas hydrates for gas storage, transport of natural gas and carbon sequestration. In this thesis, we experimentally measure the kinetics of formation and dissociation of methane hydrates and the effect of various anionic and cationic surfactants such as sodium dodecyl sulfate (SDS), cetyl trimethylammonium bromide (CTAB) and alpha olefin sulfonate (AOS) on the association/dissociation rate constant

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20

Barnes, Michael Dean. "The photoexcitation spectra of transition region species in reactions of potassium + sodium halides (X = chlorine, bromine, iodine)." Thesis, 1991. http://hdl.handle.net/1911/16417.

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The photoexcitation spectra of transition region species formed in bimolecular reactions of K + NaX (X = Cl, Br, I) have been observed by measuring the intensity of sodium D line emission at 589.0 nm as a function of excitation wavelengths between 595 and 640 nm. The portion of the spectrum measured for the K + NaCl system is qualitatively similar to that previously observed by Magurie, et al (MAG86). The spectra obtained for the K + NaBr and NaI systems are significantly different than that of the K + NaCl system, and show a distinct feature centered at approximately 610 nm, and indicate that

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21

Ko, Chung-Han, and 柯中涵. "Evaluations of the Permeation of Protective Gloves for Sequential Exposures to Thioglycolic Acid and Sodium Bromate, and Exposure to 1-Bromopropane." Thesis, 2014. http://ndltd.ncl.edu.tw/handle/kgqj25.

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碩士<br>輔仁大學<br>公共衛生學系碩士班<br>102<br>Background: Hairdressers often have occupational dermatitis on hands due to contact with chemical agents. The highest rate of use in variety of chemicals is perming agents. The frequency, time, and type of glove wearing behavior on hairdressers are inconsistent and may cause that skin is exposed to irritants and allergens. Metal cleaning technology is an important part of industry. Workers in those indistries might contact with large amounts and are exposed to high level concentrations of metal cleaning agents, but they usually don’t wear protective gloves or

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