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Dissertations / Theses on the topic 'Ammonia compound'

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Published: 25 May 2024

Last updated: 31 July 2025

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1

John, Cathy Nisha. "Protein expression and antifungal effect of fluconazole-resistant Candida species following effective in vitro treatment with K21, a novel antifungal agent." University of Western Cape, 2019. http://hdl.handle.net/11394/7889.

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Philosophiae Doctor - PhD<br>Background: Oropharyngeal candidiasis, caused by the fungus Candida, is the most common opportunistic infection affecting the quality of life of immunocompromised patients. Fluconazole is widely used as the first line of treatment for fungal infections. However, the inappropriate and misguided use of the drug has led to the evolvement of fluconazole-resistant Candida organisms. This arising resistance resulted in the urgent need for the development of new antimicrobial drugs. The aim of the present study was to investigate the antifungal action of K21, a novel

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2

McDonald, Valerie Alexandra. "Evaluating Immunotoxicity of Quaternary Ammonium Compounds." Thesis, Virginia Tech, 2017. http://hdl.handle.net/10919/79723.

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Alkyl dimethyl benzyl ammonium chloride (ADBAC) and didecyl dimethyl ammonium chloride (DDAC) are common quaternary ammonium compounds used as disinfectants in households, medical, and restaurant settings. They cause occupational skin and respiratory hazards in humans, and developmental and reproductive toxicity in mice. They also cause increased secretions of proinflammatory cytokines in cell lines and vaginal inflammation in porcine models; but have not been evaluated for developmental immunotoxicity. We assessed immunotoxicity in-vitro with J774A.1 murine macrophage cell line by analyzing c

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3

Lake, Steven Mitchell. "The cathodic generation of Zintl anions in amines : electrochemistry of bismuth polyanions in liquid ammonia /." Digital version accessible at:, 1999. http://wwwlib.umi.com/cr/utexas/main.

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4

Breuer, Paul 1968. "Gold leaching in thiosulfate solutions containing copper(II) and ammonia." Monash University, Dept. of Chemical Engineering, 2002. http://arrow.monash.edu.au/hdl/1959.1/7762.

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5

Atifi, Abdelghani el. "Application des composés d'insertion du graphite au stockage chimique de l'énergie thermique." Grenoble INPG, 1989. http://www.theses.fr/1989INPG0072.

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Etude de l'action de l'ammoniac sur les composes d'insertion graphite-chlorures metalliques. Suivie de la reaction in sistu en temps reel par diffraction des neutrons. Formation de microcristallites d'ammoniacates au sein du reseau cristallin du graphite. Avantage de cette texture par rapport a l'ammoniacate seul en vue de son application aux procedes de conversion thermochimique de l'energie. L'etude cinetique des reactions mises en jeu

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6

Sango, Tawanda. "Nitrogen-containing compounds from ammonia co-feed to the Fischer-Tropsch synthesis." Master's thesis, University of Cape Town, 2013. http://hdl.handle.net/11427/11354.

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Includes abstract.<br>Includes bibliographical references.<br>The FT synthesis has been used predominantly for production of automotive fuels. This has made the financial benefit from the FT process heavily reliant on crude oil prices. Increasing the financial viability of the process has been achieved by improving production methods, production of alternative products such as waxes, lubricants, as well as valuable chemicals such as olefins and oxygenates. In an attempt to produce additional chemicals in the FT reaction, this work investigates the synthesis of nitrogen containing compounds via

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7

Saloua, Sadok Maitrise. "Determinations of the fluxes of nitrogen-containing compounds in the mussel, Mytilus edulis (L.)." Thesis, University of Hull, 1996. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.321876.

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8

Jorgensen, Tony Charles. "Removal of ammonia from wastewater by ion exchange in the presence of organic compounds." Thesis, University of Canterbury. Chemical and Process Engineering, 2002. http://hdl.handle.net/10092/1124.

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The aim of the work described in this thesis was to study the removal of ammonium ions from water by ion exchange. The classical technique is to use biological nitrification and denitrification to convert ammonia into nitrogen gas. Removal by ion exchange offers a number of advantages, such as the ability to handle shock loadings and to polish water to a very high specification. The ion exchanger used in this project was clinoptilolite, a naturally occurring zeolite. Previous research has included characterisation of clinoptilolite, the effect of other common cations on uptake, biological reg

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9

Parr, J. A. "Antimicrobial properties of silicone quaternary ammonium compounds." Thesis, Bucks New University, 1986. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.375600.

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10

Helling, Richard K. "Oxidation kinetics of simple compounds in supercritical water : carbon monoxide, ammonia and ethanol." Thesis, Massachusetts Institute of Technology, 1986. http://hdl.handle.net/1721.1/14882.

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Thesis (Sc. D.)--Massachusetts Institute of Technology, Dept. of Chemical Engineering, 1986.<br>MICROFICHE COPY AVAILABLE IN ARCHIVES AND SCIENCE<br>Vita.<br>Includes bibliographies.<br>by Richard K. Helling.<br>Sc.D.

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11

Hoy, Jason Michael. "Syntheses of Aluminum Amidotrihydroborate Compounds and Ammonia Triborane as Potential Hydrogen Storage Materials." The Ohio State University, 2010. http://rave.ohiolink.edu/etdc/view?acc_num=osu1260474478.

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12

Christofides, A. "Pyrolysis gas chromatographic analysis of quaternary ammonium compounds." Thesis, Cardiff University, 1985. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.304009.

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13

De, Vries Christian. "Adding ammonia during Fischer-Tropsch Synthesis: Pathways to the formation of N-containing compounds." Doctoral thesis, University of Cape Town, 2017. http://hdl.handle.net/11427/25269.

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The Fischer-Tropsch synthesis (FTS) process, better known for its ability to produce synthetic fuel via the hydrogenation of CO, has shown potential to produce valuable chemicals when ammonia is added to the feed. In this work certain aspects of the pathway to the formation of N-containing compounds that form when NH₃ is added during FTS, using mostly iron based catalysts is investigated. In addition, the effect this has on the FTS reaction itself is evaluated. To achieve this goal, both theoretical and experimental techniques are used in this study. The CO adsorption and dissociation reaction

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14

Rabaud, Nicole Elisabeth. "Characterization and quantification of airborne ammonia and volatile organic compounds from industrial animal agriculture /." For electronic version search Digital dissertations database. Restricted to UC campuses. Access is free to UC campus dissertations, 2002. http://uclibs.org/PID/11984.

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15

Dennen, Katherine Faye. "Synthesis of ammonium, sodium, and potassium fluoroionohpores." Link to electronic thesis, 2002. http://www.wpi.edu/Pubs/ETD/Available/etd-0906102-155832/.

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16

Ioannou, Christopher J. "Action of disinfectant quaternary ammonium compounds against Staphylococcus aureus." Thesis, University of Brighton, 2004. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.423601.

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17

Fava, Stefano G. "Effects of chlorine and ammonia compounds on the bioenergetic physiology of rainbow trout, Oncorhynchus mykiss." Thesis, National Library of Canada = Bibliothèque nationale du Canada, 1998. http://www.collectionscanada.ca/obj/s4/f2/dsk2/tape17/PQDD_0009/MQ31829.pdf.

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18

Tezel, Ulas. "Fate and effect of quaternary ammonium compounds in biological systems." Diss., Atlanta, Ga. : Georgia Institute of Technology, 2009. http://hdl.handle.net/1853/28229.

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Thesis (M. S.)--Civil and Environmental Engineering, Georgia Institute of Technology, 2009.<br>Committee Chair: Pavlostathis, Spyros G.; Committee Member: Huang, Ching-Hua; Committee Member: Hughes, Joseph B.; Committee Member: Sobecky, Patricia A.; Committee Member: Spain, Jim C.

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19

Jones, Nicole Jean. "NITRIFYING BACTERIAL ABUNDANCE IN RELATION TO NITROGEN AND PHOSPHORUS COMPOUNDS IN WETLANDS." OpenSIUC, 2012. https://opensiuc.lib.siu.edu/theses/829.

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Floodplain lakes are wetlands which receive flood waters from nearby rivers or other sources. Water samples were taken from floodplain lakes near the Illinois River, the Mississippi River, and the Cache River in Southern Illinois. Fluorescence in situ hybridization (FISH), spectrophotometry, and gene probes were used to investigate the effect of nutrient and chemical concentrations on the abundance of nitrifying bacteria; specifically ammonia-oxidizing Nitrosococcus and Nitrosomonadales and nitrite-oxidizing Nitrospira and Nitrobacter. Nitrosococcus was the dominant ammonia-oxidizing bacteria

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20

Sun, Yongzhou. "Study of Ammonia Borane and its Derivatives: Influence of Nanoconfinements and Pressures." FIU Digital Commons, 2015. http://digitalcommons.fiu.edu/etd/1830.

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Recently, ammonia borane has increasingly attracted researchers’ attention because of its merging applications, such as organic synthesis, boron nitride compounds synthesis, and hydrogen storage. This dissertation presents the results from several studies related to ammonia borane. The pressure-induced tetragonal to orthorhombic phase transition in ammonia borane was studied in a diamond anvil cell using in situ Raman spectroscopy. We found a positive Clapeyron-slope for this phase transformation in the experiment, which implies that the phase transition from tetragonal to orthorhombic is exot

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21

Honma, Sensho. "Production of aromatic compounds and functional carbon materials by pulse current pyrolysis of woody biomass." Kyoto University, 2015. http://hdl.handle.net/2433/200459.

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Kyoto University (京都大学)<br>0048<br>新制・課程博士<br>博士(農学)<br>甲第19196号<br>農博第2135号<br>新制||農||1034(附属図書館)<br>学位論文||H27||N4942(農学部図書室)<br>32188<br>京都大学大学院農学研究科森林科学専攻<br>(主査)教授吉村剛, 教授髙野俊幸, 教授渡邊隆司<br>学位規則第4条第1項該当

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22

Wright, Dominic S. "Novel complexes of alkali metal compounds, synthesised by the ammonium salt route." Thesis, University of Cambridge, 1989. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.306474.

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23

Robinson, Emily R. T. "α,β-unsaturated acyl ammonium intermediates in asymmetric organocatalysis". Thesis, University of St Andrews, 2015. http://hdl.handle.net/10023/7010.

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This thesis details investigations into the generation and synthetic utility of α,β-unsaturated acyl ammonium intermediates using isothioureas as Lewis base organocatalysts to generate a range of heterocyclic products. Initial investigations focussed on the development of a Michael addition-lactonisation protocol utilising α,β-unsaturated acyl ammonium intermediates (generated in situ from HBTM 2.1 and α,β-unsaturated homoanhydrides) and a range of 1,3-dicarbonyl nucleophiles. Products could be isolated as lactones or as ring-opened highly functionalised esters, giving good yields and excellen

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Smith, Siobhan Rose. "Applications of isothiourea generated ammonium enolates in asymmetric synthesis." Thesis, University of St Andrews, 2014. http://hdl.handle.net/10023/11532.

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This thesis describes expansion of the ability of isothioureas to act as organocatalysts in formal [2+2]-, [3+2]- and [4+2]-cycloadditions between carboxylic acids and various acceptors via Type I ammonium enolate intermediates. Chapter 2 describes the optimisation and investigation of [2+2]-cycloadditions from ammonium enolates and N-sulfonylimines as the two components. The development of this methodology allows successful access to highly stereodefined β-lactams and, following in situ ring-opening, β-aminoesters. The products are obtained from either preformed homoanhydrides or directly fro

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25

Owens, Gary. "Nitrate selective resins : interaction of monomeric and polymeric quaternary ammonium compounds with nitrates /." Title page, contents and abstract only, 1995. http://web4.library.adelaide.edu.au/theses/09PH/09pho97.pdf.

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26

Govindji, Nishal. "Inhibiting and characterising biofilms formed by gram-negative uropathogenic bacteria." Thesis, University of Manchester, 2013. https://www.research.manchester.ac.uk/portal/en/theses/inhibiting-and-characterising-biofilms-formed-by-gramnegative-uropathogenic-bacteria(b1dab3aa-ca56-4b0d-87e5-9c4c5bf11721).html.

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Urinary catheters are indispensable in healthcare and, with an ageing population, their use will continue to increase. However, they are commonly associated with colonisation and urinary tract infections (UTIs) caused by the attachment of bacteria to the catheter surface. Application of a novel cationic compound as a catheter coating may have a significant impact on the costs associated with treatment of UTIs and reduce the need for catheter replacement, as well as decreasing the number of UTI associated morbidity and mortality. Cationic compounds in particular are known to interact with the n

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27

Middleton, Mark D. "Synthesis of novel amino acids and peptides by rearrangement of ammonium ylides generated from metal carbenoids." Thesis, University of Nottingham, 2003. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.289457.

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28

Dell'Acqua, M. "NEW SYNTHETIC STRATEGIES FOR THE PREPARATION OF HETEROCYCLIC AND HETEROPOLYCYCLIC COMPOUNDS." Doctoral thesis, Università degli Studi di Milano, 2012. http://hdl.handle.net/2434/170500.

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The aim of the project of this doctoral thesis is the development of new synthetic strategies for the preparation of heterocyclic and heteropolycyclic compounds of potential interest in biological and pharmacological fields. In particular, we studied new general, flexible and regioselective synthetic approaches to oxygen and nitrogen heterocycles. We showed the versatility of nucleophilic addition/annulation domino reactions of alkyne compounds bearing a proximate nucleophile in the synthesis of heterocyclic systems, such as dihydroisobenzofurans, isoquinolines and naphthyridines. These approa

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29

Daham, S. A. "The antibacterial activity of chlorhexidine in combination with dodecyl trimethyl ammonium bromide and some other antimicrobial agents." Thesis, University of Bradford, 1987. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.378115.

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30

Henkel, Robert [Verfasser], Frank [Akademischer Betreuer] Rößner, and Michael [Akademischer Betreuer] Claeys. "The influence of ammonia on Fischer-Tropsch synthesis and formation of N-containing compounds / Robert Henkel. Betreuer: Frank Rößner ; Michael Claeys." Oldenburg : BIS der Universität Oldenburg, 2012. http://d-nb.info/1048749215/34.

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31

Xie, Xinghua. "Effects of ammonium lignosulphonate and diammonium phosphate on soil organic matter, phosphorous fractions and corn (Zea mays L.) yield in two eastern Canadian soils." Thesis, McGill University, 1993. http://digitool.Library.McGill.CA:80/R/?func=dbin-jump-full&object_id=56811.

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Phosphorous fertilizer has an efficiency of about 10 percent, and this efficiency must be improved, in order to avoid excessive loss of a non-renewable resource. Ammonium lignosulphonate (ALS), a by-product of the pulp and paper industry, is expected to improve efficiency of fertilizer phosphate (P) for corn (Zea mays L.) production. Field experiments were conducted to investigate effects of added ALS and P on soil organic matter and P fractions, as well as corn yields and nutrient uptake in a Ste. Rosalie clay soil and an Ormstown silty clay loam soil in 1990 and 1991. Incubation studies show

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32

Chen, Xiaocheng. "Synthesis of 10-Carboxy-N-Decyol-N, N’- Dimethyldecyl-1-Ammonium Bromide as Organogelator & Room temperature Shape Memory Programming of Stearic Acid/ Natural Rubber Bilayer Blend." University of Akron / OhioLINK, 2017. http://rave.ohiolink.edu/etdc/view?acc_num=akron1500563824207268.

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33

Jennings, Megan Christina. "Bioorganic Investigation of Quaternary Ammonium Compounds: Probing Antibacterial Activity and Resistance Development with Diverse Polyamine Scaffolds." Diss., Temple University Libraries, 2017. http://cdm16002.contentdm.oclc.org/cdm/ref/collection/p245801coll10/id/434038.

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Chemistry<br>Ph.D.<br>Quaternary ammonium compounds (QACs) have long served as lead disinfectants in residential, industrial, and hospital settings. Their simple yet effective amphiphilic nature makes them an ideal class of compounds through which to explore antibacterial activity. We have developed novel multiQAC scaffolds through simple and cost-efficient syntheses, yielding hundreds of diverse compounds strategically designed to examine various aspects of antibacterial and anti-biofilm activity, as well as toxicity. Many of these bis-, tris-, and tetraQACs display antibacterial activity 10

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34

Ghalaieny, Mohamed. "Lab and field studies of the kinetics and composition of atmospheric reactive nitrogen and volatile organic compounds." Thesis, University of Manchester, 2013. https://www.research.manchester.ac.uk/portal/en/theses/lab-and-field-studies-of-the-kinetics-and-composition-of-atmospheric-reactive-nitrogen-and-volatile-organic-compounds(14561aed-da23-44e8-8819-c752f0f9613d).html.

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Accurate measurements of ammonia, nitric acid and formic acid are important for achieving a complete understanding of their atmospheric role. Models and measurements of formic acid in the atmosphere continue to show disagreements. Also, the contributions of NMHCs and reactive nitrogen (HNO3 and NH3) to organic and inorganic aerosol formation are important to quantify as gaps in the knowledge of atmospheric aerosols are a source of uncertainty in climate science. In this thesis, concentrations of ammonia were measured in the atmosphere and the production of formic acid from the ozonolysis of is

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35

Jemaat, Zulkifly Bin. "Treatment of complex industrial wastewaters containing ammonium and phenolic compounds using granular sludge in continuous airlift reactors." Doctoral thesis, Universitat Autònoma de Barcelona, 2013. http://hdl.handle.net/10803/117276.

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Esta tesis doctoral versa sobre la eliminación simultánea de compuestos fenólicos con reactores de biomasa granular trabajando en continuo. El estudio está dividido en dos partes principales; el primer tema trata sobre la modelización de la nitritación, mientras que el otro está dedicado al trabajo experimental sobre la nitritación y eliminación simultánea de compuestos fenólicos. En el estudio de modelización, se desarrolló un modelo matemático de biopelícula para describir la nitritación en reactores de biomasa granular aerobia operando en continuo. El modelo incorpora una estrategia de con

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36

Navin, V. "One-Pot Synthesis Of Chiral Disulfides & Diselenides From α-Amino Acids Mediated By Ammonium Tetrathiomolybdate In Water". Thesis, Indian Institute of Science, 2001. https://etd.iisc.ac.in/handle/2005/268.

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We have described herein a convenient one-pot synthesis of lisulfides/diselenides from a-amino acids mediated by ammonium etrathiomolybdate in water. (Figure 1) (Figure) Figure 1 Transformation of α-amino acids into the corresponding tiiocyanates/selenocyanates/disulfides/diselenides Halo-de-amination of a-amino acids using HBr/NaNCte followed by treatment with ammonium tetrathiomolybdate (NH4)2]VloS4 jLb provided a general route for the the one-pot synthesis of chiral a,a' bis (dithio) carboxylic acids (Figure 1, 2b). The yields were moderate, limited mainly the moderate conv

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Navin, V. "One-Pot Synthesis Of Chiral Disulfides & Diselenides From α-Amino Acids Mediated By Ammonium Tetrathiomolybdate In Water". Thesis, Indian Institute of Science, 2001. http://hdl.handle.net/2005/268.

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We have described herein a convenient one-pot synthesis of lisulfides/diselenides from a-amino acids mediated by ammonium etrathiomolybdate in water. (Figure 1) (Figure) Figure 1 Transformation of α-amino acids into the corresponding tiiocyanates/selenocyanates/disulfides/diselenides Halo-de-amination of a-amino acids using HBr/NaNCte followed by treatment with ammonium tetrathiomolybdate (NH4)2]VloS4 jLb provided a general route for the the one-pot synthesis of chiral a,a' bis (dithio) carboxylic acids (Figure 1, 2b). The yields were moderate, limited mainly the moderate conversi

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38

Hajaya, Malek Ghaleb. "Fate and effect of quaternary ammonium antimicrobial compounds on biological nitrogen removal within high-strength wastewater treatment systems." Diss., Georgia Institute of Technology, 2011. http://hdl.handle.net/1853/41113.

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High strength wastewater (HSWW) generated in food processing industries is characterized by high organic carbon and nitrogen content, and thus high oxygen demand. Biological nitrogen removal (BNR) is a technology widely used for the treatment of HSWW. Food processing facilities practice sanitation to keep food contact surfaces clean and pathogen-free. Benzalkonium chlorides (BACs) are cationic quaternary ammonium antimicrobial compounds (QACs) common in industrial antimicrobial formulations. BAC-bearing wastewater generated during sanitation applications in food processing facilities is combin

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Chen, Shentan. "Theoretical studies on oxidative addition of ammonia to iridium complexes and metathesis reactions of triple bonds involving tungsten, molybdenum, carbon and nitrogen employing density functional theory." Columbus, Ohio : Ohio State University, 2009. http://rave.ohiolink.edu/etdc/view.cgi?acc%5Fnum=osu1245255909.

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Russell, Elizabeth F. (Elizabeth Fiona). "Influence of ammonium lignosulfonate fertilizer mixtures on corn (Zea mays L.) growth and nutrient composition." Thesis, McGill University, 1992. http://digitool.Library.McGill.CA:80/R/?func=dbin-jump-full&object_id=61168.

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Fertilizer P fixation and fertilizer N losses in soils may be reduced through additions of polyphenolic compounds. The influence of ammonium lignosulfonate (NH$ sb4 sp+$-LS) on triple superphosphate (TSP) efficiency was investigated in a soil incubation study using three Quebec soils and in a growth bench study using one soil. For the incubation study, soils were analyzed for pH and P extractability, as a function of NH$ sb4 sp+$-LS rate and time. In the growth bench study, TSP and NH$ sb4 sp+$-LS were applied at varying rates and corn (Zea mays L.) dry matter yields and nutrient compositions

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Kane, Deborah M. "Evaluation of a sanitizing system using isopropyl alcohol quaternary ammonium formula and carbon dioxide for dry-processing environments." Thesis, Kansas State University, 2012. http://hdl.handle.net/2097/14175.

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Master of Science<br>Food Science<br>Kelly J. K. Getty<br>Dry-processing environments are particularly challenging to clean and sanitize because water introduced into systems not designed for wet cleaning can favor growth and establishment of pathogenic microorganisms such as Salmonella. The objective was to determine the efficacy of isopropyl alcohol quaternary ammonium (IPAQuat) formula and carbon dioxide (CO[subscript]2) sanitizer system for eliminating Enterococcus faecium and Salmonella on food contact surfaces. Coupons of stainless steel and conveyor belting material used in dry-proces

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Kulchat, Sirinan. "Dynamic covalent chemistry of C=N, C=C and quaternary ammonium constituents." Thesis, Strasbourg, 2015. http://www.theses.fr/2015STRAF018/document.

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Cette thèse décrit la Chimie Covalente Dynamique (CCD) des échanges imine/imine, Knoevenagel/imine et Knoevenagel/Knoevenagel. La L-proline est un excellent organocatalyseur pour la formation de Bibliothèques Covalentes Dynamiques (BCDs). Cependant, l’interconversion entre des dérivées Knoevenagel de l’acide diméthylbarbiturique et des imines se déroule rapidement sans catalyseur. Une nouvelle classe de CCD basée sur des échanges par substitutions nucléophiles (SN2/SN2’) entre des sels d’ammonium quaternaires et des amines tertiaires est développée, impliquant la catalyse par l’iodure. Les réa

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43

Pereira, Alice. "Contribution à l'étude de la qualité des eaux des retenues amazoniennes : Application de la modélisation mathématique à la retenue de Tucurui (Brésil)." Marne-la-vallée, ENPC, 1994. http://www.theses.fr/1994ENPC9422.

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Le développement hydroélectrique de la région amazonienne a conduit la création de plusieurs retenues. La qualité de l'eau de ces retenues subit de modifications provoquées par divers facteurs parmi lesquels la dégradation de la végétation terrestre immergée semble prédominante. Nous avons cherché l'intégration de ces facteurs dans un modèle mathématique pour étudier l'évolution de cette qualité de l'eau. Ce modèle décrit, selon les dimensions verticale et longitudinale, le comportement de cinq variables d'état : l'oxygène dissous, la matière organique dans la colonne d'eau, la matière organiq

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Nabiyeva, Svetlana. "Water-based headspace single-drop microextraction and capillary electrophoresis for the determination of volatile inorganic compounds in complex matrices." Doctoral thesis, Lithuanian Academic Libraries Network (LABT), 2010. http://vddb.laba.lt/obj/LT-eLABa-0001:E.02~2010~D_20101214_103540-08331.

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The objective of the present work was systematic investigation of water-based headspace single-drop microextraction (SDME) technique, its conjunction with capillary electrophoresis, and application for the analysis of volatile inorganic compounds (cyanide and ammonium) in biomedical and environmental samples. Theoretically evaluated and experimentally confirmed that the manipulation in the volatility of the analyte by its chemical modification in the sample and/or in the acceptor phase is the most effective way to enhance the extraction performance in headspace SDME. Maximum extraction efficie

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Ouchefoun, Moussa. "Nouvelles applications analytiques des ions tribromures : cas des petroles." Paris 6, 1988. http://www.theses.fr/1988PA066454.

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Elaboration d'une nouvelle technique qui associe un agent original de bromation (le tribomure de tetrabutylammonium) a un dosage voltamperometrique. Cette nouvelle technique permet non seulement de determiner un indice de brome dans le cas des fractions lourdes des petroles, mais encore pour la premiere fois d'effectuer une discremination entre reaction d'addition et reaction de substitution

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Rowhani, Touraj. "Development and validation of an analytical method for determination of polyhexamethylene biguanide level in the presence of quaternary ammonium compounds in recreational water." Click here for download, 2006. http://wwwlib.umi.com/cr/villanova/fullcit?p1432527.

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Oh, Seung Dae. "Metagenomic and metatranscriptomic investigation of microorganisms exposed to benzalkonium chloride disinfectants." Diss., Georgia Institute of Technology, 2013. http://hdl.handle.net/1853/52928.

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Benzalkonium chlorides (BACs) are widely used, broad-spectrum disinfectants and frequently detected in the environment, even at toxic levels for life. Since such disinfectants can induce broad resistance capabilities, BACs may fuel the emergence of antibiotic resistance in the environment. A substantial body of literature has reported that exposure to BACs causes antibiotic resistance; yet, other studies suggest that the resistance linkage is rare, unsystematic, and/or clinically insignificant. Accordingly, whether or not disinfectant exposure mediates antibiotic resistance and, if so, what mo

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King, Robin K. "The Presence of Pathogenic Bacteria in Recirculating Aquaculture System Biofilms and their Response to Various Sanitizers." Diss., Virginia Tech, 2001. http://hdl.handle.net/10919/27185.

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Recirculating aquaculture offers a prospect for successful fish farming, but this form of aquaculture presents a great potential for pathogenic microorganisms to become established in the system through the formation of biofilms. Biofilms are capable of forming on all aquaculture system components, incorporating the various microflora present in the water. Pathogenic microorganisms released from the biofilms are capable of causing recurring exposure to disease in both fish and humans. With the increased consumption of raw and rare fish, the presence of these bacteria in or on the fish could

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Potturi, Hima. "SYNTHESES AND ESTROGENICITY STUDY OF DIETHYLSTILBESTROL AND BISPHENOL-A ANALOGS AS POTENTIAL REPLACEMENT FOR BISPHENOL-A AND INVESTIGATION ON NOVEL REACTIONS INDUCED BY IODANE/QUATERNARY AMMONIUM HALIDES." OpenSIUC, 2011. https://opensiuc.lib.siu.edu/dissertations/403.

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Dynamic isomerization of diethylstilbestrol (DES) makes it difficult to ascertain the active estrogen between its E and Z isomers. An indirect approach has been used in this project to identify the active estrogen. Methoxylated E- and Z-DES (13 and 14) and 9,10-diethylphenanthrene-3,6-diol (15), a closed ring analog of Z-DES, were synthesized and tested for their estrogenicity. The estrogenicity of 13 is higher than that of 14 and 15, which indicates that E-DES is more estrogenic than Z-DES. Dimethylstilbestrol (16), another analog of DES, was also synthesized and tested. Its estrogenicity is

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50

Grigonis, Aidas. "Benzalkonio ir metenamino analogų antimikrobinio aktyvumo nustatymas in vitro ir jo priklausomybė nuo aerozolio dalelių krūvio." Doctoral thesis, Lithuanian Academic Libraries Network (LABT), 2007. http://vddb.library.lt/obj/LT-eLABa-0001:E.02~2007~D_20070214_152534-59492.

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Antibacterial effectiveness in vitro of the original quaternary ammonium compounds that were synthesized in the Laboratory of Biologically active substances was determined and the dependence of this activity upon chemical structure of the compound was established. Also generalisations have been made concerning the regularity of this dependency, the effectiveness of the compounds was compared to benzalkonium chloride, their advantages and disadvantages were discussed. Acute toxicity of the most effective compound was established and compared to that of benzalkonium chloride. It was found that

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