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Dissertations / Theses on the topic 'Chemical Sciences'

Author: Grafiati

Published: 4 June 2021

Last updated: 7 September 2023

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1

Milewski, Thomas. "Stratospheric chemical-dynamical ensemble data assimilation." Thesis, McGill University, 2012. http://digitool.Library.McGill.CA:80/R/?func=dbin-jump-full&object_id=110352.

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Ensemble data assimilation uses Monte-Carlo methods to estimate flow-dependent error covariances which allow the transfer of information from observed variables to correlated ones. As the winds are largely unobserved in the stratosphere and models have biases there, the possibility to constrain the dynamical analysis from temperature or ozone observations is attempted using ensemble data assimilation.The applicability of coupled chemical/dynamical ensemble data assimilation in the stratosphere is tested in idealized perfect model observation system simulation experiments with the IGCM-FASTOC c

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2

Gerothanassis, I. P. "Application of a DSc in the School of Chemical Sciences." Thesis, University of East Anglia, 2010. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.539366.

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3

Gunasekaran, Subbiah, M. Sadikbatcha, and P. Sivaraman. "Mapping chemical science research in India: A bibliometric study." NISCAIR, New Delhi, India, 2006. http://hdl.handle.net/10150/299580.

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Chemical sciences research in India has been mapped with data collected from the CD-ROM version of Chemistry Citation Index [publication year : 2002]. Roughly, 4.5% of the global R&D output in chemical sciences was contributed by Indian in 2002. Indian researchers published 6186 papers from 569 journals and 12 non-journal sources. More than 45% of these papers appeared in journals with an impact factor less than 1.000. Around 2% of the papers were either published in journals with no impact factor or not indexed in JCR 2003. The average impact factor for journal articles during this period is

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4

Lohse, Peter A. (Peter Andreas). "Distribution of knowledge production in the chemical sciences in the US." Thesis, Massachusetts Institute of Technology, 2011. http://hdl.handle.net/1721.1/65786.

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Thesis (M.B.A.)--Massachusetts Institute of Technology, Sloan School of Management, 2011.<br>Cataloged from PDF version of thesis.<br>Includes bibliographical references (p. 43-44).<br>A citation analysis was carried out to gain an understanding of the geographical and institutional distribution of highly cited articles in the chemical sciences in the US over the last thirty years. The contribution of US chemistry departments was determined by quantifying the number of highly cited articles published by individual authors or groups of authors from the same department. Articles stemming from co

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5

Degrand, Elisabeth. "Evolving Chemical Reaction Networks." Thesis, KTH, Skolan för elektroteknik och datavetenskap (EECS), 2019. http://urn.kb.se/resolve?urn=urn:nbn:se:kth:diva-257491.

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One goal of synthetic biology is to implement useful functions with biochemical reactions, either by reprogramming living cells or programming artificial vesicles. In this perspective, we consider Chemical Reaction Networks (CRNs) as a programming language. Recent work has shown that continuous CRNs with their dynamics described by ordinary differential equations are Turing complete. That means that any function over the reals that is computable by a Turing machine in arbitrary precision, can be computed by a CRN over a finite set of molecular species. The proof uses an algorithm which, given

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6

Attwell, Jane Louise. "Heterogeneous chemical processing by stratospheric aerosol." Thesis, University of Oxford, 1998. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.390491.

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7

Webb, Penelope Eugenia. "Chemical inflation for assisted assembly." Thesis, Massachusetts Institute of Technology, 2017. http://hdl.handle.net/1721.1/114060.

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Thesis: S.M., Massachusetts Institute of Technology, School of Architecture and Planning, Program in Media Arts and Sciences, 2017.<br>Page 85 blank. Cataloged from PDF version of thesis.<br>Includes bibliographical references (pages 81-84).<br>This thesis aims to utilize an output method for popup fabrication, using chemical inflation as a technique for instant, hardware-free shape change. By applying state-changing techniques as a medium for material activation, we provide a framework for a two-part assembly process, starting from the manufacturing side, whereby a structural body is given it

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8

Puhl, Jacqueline L. "Chemical instabilities in isotropic turbulent flows." Doctoral thesis, Universite Libre de Bruxelles, 1988. http://hdl.handle.net/2013/ULB-DIPOT:oai:dipot.ulb.ac.be:2013/213327.

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9

Khannoon, Eraqi Radwan R. "Comparative chemical ecology, behaviour, and evolutionary genetics of acanthodactlylus boskianus (Squamata: Lacertidae) : comparative chemical ecology, behaviour and evolution." Thesis, University of Hull, 2009. http://hydra.hull.ac.uk/resources/hull:2415.

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Acanthodactylus boskianus is a common lizard species frequently occurring in different habitats throughout Egypt. Both males and females have well developed epidermal femoral glands. This species is territorial and males acquire dominance hierarchies in captivity. The current work included three different techniques to study the importance of femoral gland secretions in communication and signal evolution of A. boskianus. These are behaviour, chemical and DNA analyses techniques. Behavioural bioassays in different experiments showed that the femoral gland secretions are used in communication be

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10

Ballhaus, Florentine. "Investigating plant autophagy with new chemical modulators." Thesis, Uppsala universitet, Institutionen för biologisk grundutbildning, 2020. http://urn.kb.se/resolve?urn=urn:nbn:se:uu:diva-428075.

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Autophagy is a major catabolic pathway in which cell components get sequestered in a double membrane vesicle, transported to the vacuole, degraded by vacuolar hydrolases and recycled. Through this process, cells ensure cell homeostasis and remobilise nutrients. The autophagic flux can be enhanced as an adaptive stress response, improving plants resistance against stress, reducing aging and ultimately increasing yield. However, autophagy regulation in plants remains poorly understood. Novel plant-specific modulators can be used in a chemical genetic approach for identification of proteins inv

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11

Rozenbeek, Erik. "Surface reactivity of ultrathin atomic layer deposited Al2O3 on Li[Ni0.8Mn0.1Co0.1]O2." Thesis, Uppsala universitet, Institutionen för kemi - Ångström, 2020. http://urn.kb.se/resolve?urn=urn:nbn:se:uu:diva-416702.

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The nickel-rich cathode material Li[Ni0.8Mn0.1Co0.1]O2 is a much sought after material in Li-ion batteries for the future of electric vehicles due to its high specific capacity. However, it exhibits fast degradation during its use due to the interaction between the electrolyte and the cathode surface leading to capacity loss. In this thesis, the surface interaction of pristine and alumina coated NMC811, and NiO powder with electrolyte was investigated to observe difference in surface reactivity and if hydroxide groups on the surface could be a potential culprit in degradation. Thermogravimetri

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12

Ait, Chaalal Farid. "Bimolecular chemical reaction in a two-dimensional Navier-Stokes flow." Thesis, McGill University, 2012. http://digitool.Library.McGill.CA:80/R/?func=dbin-jump-full&object_id=110480.

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This thesis studies an infinitely fast bimolecular chemical reaction in a two-dimensional Navier-Stokes flow using a local Lagrangian stretching theory approach. Our flow, large scale and characterized by chaotic Lagrangian trajectories, is an idealized framework for stirring and mixing in the wintertime midlatitude deep stratosphere (WMDS). The dynamics of the WMDS are indeed non-local with chaotic advection thought to occur. The reactants are initially segregated and separated by a one-dimensional contact line. Because the chemical reaction is instantaneous, this problem simplifies to the st

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13

Richmond, Mitchell D. "CHEMICAL TOPPING BURLEY TOBACCO." UKnowledge, 2018. https://uknowledge.uky.edu/pss_etds/103.

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The act of topping tobacco (Nicotiana tabacum L.) involves the removal of the terminal bud or inflorescence of the tobacco plant. This practice ordinarily is accomplished by manually removing the top of each tobacco plant in an entire field which is labor intensive and costly. Chemical topping utilizes sucker control products to inhibit the terminal bud and axillary bud growth without manually removing the top of the tobacco plant. There were several research objectives in order to determine the utility of a chemical topping system: 1) determine if burley tobacco could be chemically topped wit

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14

Ingle, Stéphanie. "Chemical geodynamics of the early kerguelen plume." Doctoral thesis, Universite Libre de Bruxelles, 2003. http://hdl.handle.net/2013/ULB-DIPOT:oai:dipot.ulb.ac.be:2013/211324.

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15

Guillemard, Véronique. "Design and chemical synthesis of selective cancer therapeutics." Thesis, McGill University, 2004. http://digitool.Library.McGill.CA:80/R/?func=dbin-jump-full&object_id=85073.

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The clinical use of chemotherapeutic agents against malignant tumors is successful in many cases but suffers from major drawbacks. One drawback is the lack of selectivity which leads to severe side effects and limited efficacy, and another is the emergence/selection of drug-resistance. To limit non-specific toxicity and to improve the efficiency of cancer therapy, "tumor markers", which are proteins generally overexpressed on the surface of tumor cells, can be selectively targeted.<br>Growth factor receptors are one of the most extensively studied groups of tumor markers. The implicatio

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16

Ezzat, Kariem. "CELL PENETRATING PEPTIDES : CHEMICAL MODIFICATION AND FORMULATION DEVELOPMENT." Licentiate thesis, Stockholms universitet, Institutionen för neurokemi, 2011. http://urn.kb.se/resolve?urn=urn:nbn:se:su:diva-56364.

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Cell penetrating peptides (CPPs) have been extensively studied and exploited as drug delivery vectors for a wide variety of therapeu-tic cargos. However, several issues remain to be addressed regarding the enhancement of their efficiency and stability. In addition, to be available for patients, CPP-based therapeutics have to be formulated into suitable pharmaceutical forms that can be readily manufactured, transported, stored and conveniently used.In this thesis, three chemically modified CPPs are developed having superior delivery properties for several nucleic acid-based the-rapeutic cargoes

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17

Davies, Matthew John. "Chemical communication in the European otter, Lutra lutra." Thesis, University of Hull, 2008. http://hydra.hull.ac.uk/resources/hull:2574.

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European otter (Lutra lutra) scent marks (spraint and anal sac secretion material) from captive and wild animals were analysed using solvent extraction and solid phase micro extraction (SPME). An ageing study (using SPME) mapped spraint chemical composition changes following deposition and how low temperature storage and exposure to the environment affected these changes. Chemicals with opposite time dependence were found; providing a possible spraint ageing mechanism. Temperature and environmental conditions affected the rates of production and deterioration of these chemicals and therefore t

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18

Fisher, Duncan Southam. "Chemical weathering of sulfide mineralization on Mars." Thesis, Massachusetts Institute of Technology, 1990. http://hdl.handle.net/1721.1/52911.

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Thesis (M.S.)--Massachusetts Institute of Technology, Dept. of Earth, Atmospheric, and Planetary Sciences, 1990.<br>Includes bibliographical references (leaves 68-76).<br>by Duncan Southam Fisher.<br>M.S.

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19

Gonneea, Meagan Joan Eagle. "Temporal variability in chemical cycling of the subterranean estuary and associated chemical loading to the coastal ocean." Thesis, Massachusetts Institute of Technology, 2014. http://hdl.handle.net/1721.1/87514.

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Thesis: Ph. D., Joint Program in Oceanography/Applied Ocean Science and Engineering (Massachusetts Institute of Technology, Department of Earth, Atmospheric, and Planetary Sciences; and the Woods Hole Oceanographic Institution), 2014.<br>Cataloged from PDF version of thesis.<br>Includes bibliographical references.<br>At the land-ocean interface, terrestrial groundwater interacts with seawater to form a subterranean estuary, which can play host to dynamic biogeochemical cycling of nutrients, trace metals and radionuclides. This chemically altered groundwater enters the ocean through submarine g

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20

Fox, Susan. "A Comparison of Chemical Composition & Fermentation Patterns of Alternative Silages to Whole Plant Corn Silage." TopSCHOLAR®, 1989. https://digitalcommons.wku.edu/theses/2346.

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A comparison of the relationship of fermentation to chemical composition was made for forages which were wilted and ensiled at 35 to 45 percent dry matter. Trial I consisted of three forages ensiled in October, 1981: interseeded soybeans and grain sorghum. whole plant corn with added anhydrous ammonia, and whole plant corn with shelled corn added at a rate of 150 kg/t of fresh forage. Trial II consisted of two forages ensiled in 1982: interseeded soybeans and pearlmillet, and wheat. Temperatures of fermentation were collected, and chemical composition during the first 25 days of fermentation a

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21

Cooper, Roland Arthur 1963. "Pyrrolizidine alkaloids: Chemical basis of toxicity." Diss., The University of Arizona, 1996. http://hdl.handle.net/10150/290581.

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In humans, livestock and experimental animals, pyrrolizidine alkaloids (PAs) are toxic as a consequence of their hepatic metabolism to reactive pyrrolic esters, or dehydroalkaloids (DHAs). Despite their similarity in structures, PAs often vary markedly in their lethality (LD₅₀s) and in the organs in which toxicity is expressed. We have examined whether there are differences in the physicochemical properties of certain DHAs which are associated with differences in patterns of metabolism and toxicity produced by the parent PA. Using a potentiometric method to measure hydrolysis, it was determine

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22

Marc, Katya. "Thermo-chemical recovery of styrene from polystyrene waste." Thesis, McGill University, 1992. http://digitool.Library.McGill.CA:80/R/?func=dbin-jump-full&object_id=61312.

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Styrene was recovered from polystyrene by thermo-chemical treatment in a nitrogen atmosphere carried out at 330$ sp circ$C to 410$ sp circ$C, for 30 to 60 minutes. Up to 70% of the polystyrene was converted to styrene at a reaction temperature of 406$ sp circ$C and reaction time of 45 minutes. The styrene yield increased with temperature. At the lower temperatures, the molecular weight of the polystyrene was reduced from 138 000 to 8 900. At the higher temperatures, the polystyrene residue obtained consisted mainly of styrene dimer and trimer. The use of catalysts was evaluated. The catalysts

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23

Grewal, Burrinder S. "Mechanisms of chemical and physical transdermal penetration enhancement." Thesis, Aston University, 1999. http://publications.aston.ac.uk/10978/.

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The underlying theme of this thesis is one of exploring the processes involved in the enhancement of percutaneous absorption. The development of an attenuated total reflectance Fourier-Transform infrared (ATR-FTIR) spectroscopic method to analyse diffusion of suitable topically applied compounds in membrane is described. Diffusion coefficients (D/h2) and membrane solubility (AO) for topically applied compounds were determined using a solution to Fick's second law of diffusion. This method was employed to determine the diffusional characteristics of a model permeant, 4-cyanophenol (CP), across

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24

Nemer, Randa J. "Anaerobic-aerobic treatment of chemical industrial effluents." Thesis, McGill University, 1994. http://digitool.Library.McGill.CA:80/R/?func=dbin-jump-full&object_id=26410.

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Several chemical industries in Canada discharge untreated effluents containing substantial amounts of organic pollutants. Environmental concern regarding the pollution of water bodies has led the authorities to issue stringent regulations with respect to the quality and quantity of wastewater that can be discharged. Chemical characterization and biotreatability of some waste streams generated by a chemical industry in Quebec was therefore undertaken. The study showed that two highly concentrated effluents were amenable to biological treatment. The first effluent, "plastifiant", was generated f

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25

Shen, Li 1968. "Nutritional and chemical properties of sorghum, rapeseed, and sunflower pollens." Thesis, The University of Arizona, 1992. http://hdl.handle.net/10150/278204.

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The nutritional and chemical properties of three Chinese pollens, sorghum (Sorghum sp.), rapeseed (Brassica napus) and sunflower (Helianthus annuus), were studied. All three pollens were highly preferred, with sunflower pollen the highest, by young honey bees (Apis mellifera). Rapeseed pollen increased honey bee's longevity the greatest; however, sorghum and sunflower pollens also increased the longevity relative to the no-pollen group. All three pollens had high energy (about 5 kcal/g) and carbohydrate quantities (58%). The protein, fat, and fiber levels were 27%, 7%, and 9% in rapeseed polle

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26

Huang, Wei Hua. "Chemical investigation on root barks of Oplopanax horridus." Thesis, University of Macau, 2012. http://umaclib3.umac.mo/record=b2590373.

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27

Brooker, Michael R. "Physical and Chemical Characterization of Self-Developing Agricultural Floodplains." The Ohio State University, 2018. http://rave.ohiolink.edu/etdc/view?acc_num=osu1513778530623727.

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28

Hamid, A. "Artificial immune systems for optimization, clustering and classification applications in chemical sciences and engineering." Thesis(M.Sc.), CSIR-National Chemical Laboratory, Pune, 2012. http://dspace.ncl.res.in:8080/xmlui/handle/20.500.12252/2110.

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29

Dix, Garry R. "Chemical exposure and lung function in fragrance industry employees." Thesis, University of Portsmouth, 2012. https://researchportal.port.ac.uk/portal/en/theses/chemical-exposure-and-lung-function-in-fragrance-industry-employees(91a9ece1-2e21-4715-bdf6-837ec228893f).html.

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Introduction Production employees within the UK fragrance industry are exposed to large quantities of chemical substances and mixtures over working shifts. Occupational respiratory exposure within this industry is managed in line with relevant legislation and guidelines. There is a lack, however, of published literature studying the effects of respiratory exposure to chemicals on fragrance production employees. A multi-site cross-sectional study was conducted using employees from the UK fragrance industry. The primary aim was to answer the research question: In fragrance industry employees, is

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30

Rojas, Rosario. "Secondary metabolites of Vernonia gigantea roots : isolation, antimicrobial, chemical and biotransformation studies." Connect to resource, 2000. http://rave.ohiolink.edu/etdc/view?acc%5Fnum=osu1228166792.

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31

Yimamu, (Imam) Maiwulidan (Mewlude). "Chemical vapour deposition of boron-carbon thin films from organoboron precursors." Licentiate thesis, Linköpings universitet, Tunnfilmsfysik, 2015. http://urn.kb.se/resolve?urn=urn:nbn:se:liu:diva-123909.

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Boron-carbon (BxC) thin films enriched in 10B are potential neutron converting layers for 10Bbased solid-state neutron detectors given the good neutron absorption cross-section of 10B atoms in the thin film. Chemical Vapour Deposition (CVD) of such films faces the challenge that the maximum temperature tolerated by the aluminium substrate is 660 °C and low temperature CVD routes for BxC films are thus needed. This thesis presents the use of two different organoboron precursors, triethylboron –B(C2H5)3 (TEB) and trimethylboron – B(CH3)3 (TMB) as single-source precursors for CVD of BxC thin film

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32

Aratikatla, Eswarakumar. "Design and synthesis of artemisinin-dipeptidyl vinyl phosphonate hybrid molecules as novel antimalarial agents; synthesis of biologically active molecules and studies directed towards bioactives from vernonia arborea." Thesis(Ph.D.), CSIR-National Chemical Laboratory, Pune, 2019. http://dspace.ncl.res.in:8080/xmlui/handle/20.500.12252/4591.

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Design and Synthesis of Artemisinin-Dipeptidyl Vinyl Phosphonate Hybrid Molecules as Novel Antimalarial Agents; Synthesis of Biologically Active Molecules and Studies Directed Towards Bioactives from Vernonia arborea<br>AcSIR

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33

Rivera, Michael Kirn. "Protection, exposure, and recovery for chemical field engineering." Thesis, California State University, Long Beach, 2015. http://pqdtopen.proquest.com/#viewpdf?dispub=1604869.

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<p> This project is a compilation of information from public sources as well as from private unclassified military sources combined with first hand field engineering knowledge. This report should be read prior to any and all who will be entering any Superfund site and/or Formally Used Defense Site (FUDS). Reading of this report should be done in order to make the individual aware of the risk they are under taking by entering a Superfund and FUD site. Primarily the health risks that include but are not limited the development of cancer and death. It should be noted that this report does not cov

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34

Perricane, Lisa Helen. "County Demographic Influence on Toxic Chemical Activities of Chemical-Related Industry in Michigan." ScholarWorks, 2015. https://scholarworks.waldenu.edu/dissertations/1420.

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There are a large number of chemical facilities that emit toxic chemicals in Michigan, and there is a concern regarding toxic chemical exposure to the residents of Michigan counties. However, it is uncertain whether chemical companies that emit toxic chemicals in Michigan are influenced by county demographic factors in deciding whether to engage in voluntary pollution prevention (P2) activities and whether this decision influences U.S. Environmental Protection Agency's (U.S. EPA) Risk-Screening Environmental Indicators (RSEI) scores. Using Bullard's theory of environmental justice, the purpose

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35

Zhang, Dong. "Chemical communication and its ecological consequence in the Lysmata shrimp." Thesis, University of Hull, 2009. http://hydra.hull.ac.uk/resources/hull:2422.

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Male crustaceans must find and identify receptive females to mate successfully. Mate recognition depends mainly on sex pheromones, which are detected by antennae and antennules. Distance (soluble)pheromone mediates mating behaviour of some decapod crustaceans. Contact pheromone (an insoluble coating on the body surface) has been proposed but not confirmed to be used by male decapod crustaceans to detect females. Here we report for the first time the involvement of both distance and contact pheromones in the mating processes of Lysmata shrimp (a group of protandric simultaneous hermaphrodites),

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36

Ochoa, Loza Francisco Javier 1956. "Physico-chemical factors affecting rhamnolipid (biosurfactant) application for removal of metal contaminants from soil." Diss., The University of Arizona, 1998. http://hdl.handle.net/10150/282826.

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Contamination of soil and groundwater environments by toxic metals and organic compounds is of major concern because of the potential health hazard posed for humans. Remediation of such sites may require the addition of chemical agents that help in the mobilization of contaminants which are likely to be bound to solid surfaces. Surfactants are one of the agents proposed for addition to enhance the removal of soil-bound contaminants. In this dissertation, a series of laboratory experiments were conducted to investigate constraints to the potential application of a microbially produced surfactan

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Toerien, René. "Mapping the learning trajectories of physical sciences teachers' topic specific knowledge for teaching chemical bonding." Doctoral thesis, University of Cape Town, 2017. http://hdl.handle.net/11427/25508.

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Education in South Africa is a national concern and the training and professional development of teachers, especially in science and mathematics, has consequently been prioritised by the National Government. More than 60 percent of the teachers in South Africa are older than 40 years of age, which means that within the next 10-15 years many experienced teachers will exit the system, leaving a younger and less experienced cohort of teachers behind. This study aims to make explicit the learning trajectories of physical sciences teachers, specifically with respect to their knowledge for teaching

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Van, Orman James Ashton 1969. "Kinetics of chemical exchange during melting of planetary interiors." Thesis, Massachusetts Institute of Technology, 2000. http://hdl.handle.net/1721.1/57964.

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Thesis (Ph.D.)--Massachusetts Institute of Technology, Dept. of Earth, Atmospheric, and Planetary Sciences, September 2000.<br>Includes bibliographical references.<br>Experimental and numerical modeling studies are used to place constraints on the kinetics of chemical exchange during partial melting within the mantles of the terrestrial planets. Chapter 1 presents experiments on the diffusion rates of La, Ce, Nd, Dy and Yb in diopside at pressures of 0 to 2.5 GPa and temperatures of 1050 to 1450 'C. The results demonstrate a large variation in diffusivity among the rare earth elements, with th

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Parrill, Abby Louise 1970. "Supplementing traditional chemical education on the World Wide Web." Thesis, The University of Arizona, 1996. http://hdl.handle.net/10150/278553.

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Emerging technologies provide impetus for supplements to the way chemistry is taught. Students of the current generation are conditioned to expect high-quality visual images to reinforce other informational media. Multimedia teaching tools can take advantage of this pre-conditioning. The World Wide Web (WWW) provides new opportunities for multimedia distribution. Supplemental materials for chemical education have been developed to take advantage of these emerging technologies. Molecular animations have been developed for use in lecture and for distribution via the WWW. These animations were de

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Flagg, Melissa L. "Bioprospecting, chemical investigations and drug discovery from Chilean plants." Diss., The University of Arizona, 2000. http://hdl.handle.net/10150/284167.

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This dissertation, completed as part of an International Cooperative Biodiversity Group (ICBG) Program, encompasses the field collection, taxonomic determination, bioassay-guided isolation, and chemical characterization of three plants native to Chile, each of which was collected using a distinct collection approach. Chuquiraga ulicina ssp. ulicina , collected by the ecological or environmental strategy, yielded ten compounds including four novel taraxastane-type triterpenoids, 3β-acetoxy-6β-hydroxytaraxasta-20-ene (1), 6β-hydroxytaraxast-20-en-3-one (2), 6β-hydroxytaraxasta-20-ene 3β-palmitat

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Jepson, Donald Paul. "Development of new electro-chemical methods for determination of tinplate quality." Scholarly Commons, 1992. https://scholarlycommons.pacific.edu/uop_etds/2819.

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Five electrochemical test methods were evaluated for prediction of tinplate performance during this study. In addition, test packs were performed which provided some tinplate performance data. Three of the electrochemical methods gave inconclusive results in predicting tinplate performance. Two of these were anodic polarization in citric acid solutions involving different cell configurations. Another was anodic polarization of stress fractured samples in citric acid solution. One method, measuring the tin/steel alloy couple potential and current, gave results which appeared to predict tinplate

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42

Stievano, Lorenzo. "Petit Voyage vers la surface : Structure et réactivité de solides inorganiques." Habilitation à diriger des recherches, Université Pierre et Marie Curie - Paris VI, 2005. http://tel.archives-ouvertes.fr/tel-00092493.

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Dans ma carrière, j'ai eu la chance et le privilège de m'attaquer à des problématiques scientifiques très variées, qui peuvent être ressemblées par le concept fédérateur de l'application de méthodes d'analyses physico-chimiques pour la compréhension de la structure et de la réactivité d'un matériau inorganique. Parmi les techniques d'analyse que j'ai utilisées, une place d'honneur doit sûrement être attribuée à la spectroscopie Mössbauer, qui a été la technique principale d'analyse de ma thèse et qui a continué jusqu'aujourd'hui, à travers différentes collaborations, à faire partie de mes inté

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Bassolino, Giovanni. "Tuning ultrafast chemical reaction dynamics in photoactive proteins." Thesis, University of Oxford, 2015. http://ora.ox.ac.uk/objects/uuid:42c19c5c-c6df-48e9-bb1c-8a7098eca8b4.

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This dissertation investigates the origins of tunable and efficient photochemistry in three different photoactive proteins, bacteriorhodopsin (BR), rhodopsin (RHO) and green fluorescent protein (GFP). In all cases, significant differences exist between the photoreactivity of model chromophores in solution and in the protein environment, in terms of excited state lifetime and efficiency of the primary photochemical process (opsin proteins) or the type of reaction (excited state proton transfer versus C=C double bond photoisomerisation for GFP). The work presented here investigates for each case

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Kavvada, Klairi M. "Modelling the gastric epithelium for testing of new chemical entities." Thesis, Aston University, 2004. http://publications.aston.ac.uk/11029/.

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A cell culture model of the gastric epithelial cell surface would prove useful for biopharmaceutical screening of new chemical entities and dosage forms. A successful model should exhibit tight junction formation, maintenance of differentiation and polarity. Conditions for primary culture of guinea-pig gastric mucous epithelial cell monolayers on Tissue Culture Plastic (TCP) and membrane insects (Transwells) were established. Tight junction formation for cells grown on Transwells for three days was assessed by measurement of transepithelial resistance (TEER) and permeability of mannitol and fl

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Xu, Sheng. "Oxide nanowire arrays for energy sciences." Diss., Georgia Institute of Technology, 2010. http://hdl.handle.net/1853/42876.

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Oxide nanowire arrays are playing an important role in energy sciences nowadays, including energy harvesting, energy storage, and power management. By utilizing a wet chemical growth method, we demonstrated the capabilities of synthesizing density controlled vertical ZnO nanowire arrays on a general substrate, optimizing the aspect ratio of the vertical ZnO nanowire arrays guided by a statistical method, epitaxially growing patterned vertical ZnO nanowire arrays on inorganic substrates, epitaxially growing patterned horizontal ZnO nanowire arrays on non-polar ZnO substrates, and the lift-off o

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Sandoval, Kathia a. "Physical and Chemical Characterization of Crude Oil-Water Mixtures: Understanding the Effects of Interfacial Process to Chemical Bioavailability." FIU Digital Commons, 2016. http://digitalcommons.fiu.edu/etd/2464.

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This work detailed the physical and chemical characterization of oil water mixtures prepared using fresh and weathered Macondo related oils under different conditions of mixing energy/time and in the presence/absence of chemical dispersants. The results indicated that WAFs produced consistent, droplet free solutions for both source and weathered oils with concentration ranges that represented the soluble components of the oil used. Chemically enhanced WAFs prepared with the source oil generated a large amount of micron-size droplets; however the viscosity of the weathered oils were a limiting

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Thinnes, Cyrille Christophe. "Chemical and biological studies on human oxygenases." Thesis, University of Oxford, 2014. http://ora.ox.ac.uk/objects/uuid:455f2e65-f294-461b-b44f-cd53796b14a0.

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As depicted in Chapter I, 2-oxoglutarate- (2OG) dependent oxygenases are ubiquitous in living systems and display a wide range of cellular functions, spanning metabolism, transcription, and translation. Although functionally diverse, the 2OG oxygenases share a high degree of structural similarities between their catalytic sites. From a medicinal chemistry point of view, the combination of biological diversity and structural similarity presents a rather challenging task for the development of selective small molecules for functional studies in vivo. The non-selective metal chelator 8-hydroxyqui

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Pereira, José Augusto Caldeira. "Aplicação de técnicas de ressonância magnética nuclear ao estudo de processos dinâmicos em solução." Doctoral thesis, Universidade do Porto. Reitoria, 1994. http://hdl.handle.net/10216/10215.

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Crowley, Michael J. A., Lijun Shang, and Malcolm R. Dando. "Preventing chemical weapons as sciences converge." 2018. http://hdl.handle.net/10454/16678.

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Yes<br>Stark illustrations of the dangers from chemical weapons can be seen in attacks using toxic industrial chemicals and sarin against civilians and combatants in Syria and toxic industrial chemicals in Iraq, as well as more targeted assassination operations in Malaysia and the United Kingdom, employing VX and novichok nerve agents, respectively. Concerns about such malign applications of chemical technology are exacerbated by the unstable international security environment and the changing nature of armed conflict, “where borderlines between war, civil war, large-scale violations of human

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Fradet, João Filipe Pinto Queirós. "Magnetic Nanowires with Chemical Constraints." Dissertação, 2019. https://hdl.handle.net/10216/125049.

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