Rozprawy doktorskie na temat „Chemical or enzymatic modification”
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Kriek, Marco. "Enzymatic synthesis of complex carbohydrates : approaches to the enzymatic synthesis and chemical modification of oligosaccharides". Thesis, University of Reading, 2000. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.342146.
Pełny tekst źródłaCanela, Xandri Anna. "Chemical and enzymatic valorization of polyols from biomass". Doctoral thesis, Universitat de Lleida, 2016. http://hdl.handle.net/10803/386443.
Pełny tekst źródłaEn las últimas décadas han aumentado los problemas derivados de la sobreproducción y acumulación de residuos de la industria agroalimentaria, así como los problemas medioambientales y la disminución de fuentes de materias primas. Incrementando así el interés en reutilizarlos, revalorizándolos produciendo productos de interés, acercándonos cada vez más al concepto de residuo cero. Uno de los mayores subproductos de la industria es el conocido con el término de biomasa. En este trabajo, nos hemos centrado en investigar la revalorización de una pequeña parte de los polioles presentes en la biomasa, entre ellos algunos carbohidratos y el glicerol.
In the last decades, problems related with overproduction and industry waste accumulation have increased, causing environmental problems and depletion of raw material sources. Because of that, there has been an increasing interest in the reuse of wastes to prepare valuable products, getting closer to the zero waste concept. Biomass is one of the major agroindustrial by-products. In this work, we were focused on adding-value to a small portion of the polyols present in biomass, including some carbohydrates and glycerol.
Scholten, Matthew John. "Enzymatic and chemical modification of fatty acid methyl esters: enzymatic catalysis of methyl linoleate using soybean lipoxygenase and chemical catalysis of methyl oleate Using Hypobromination". Thesis, University of Iowa, 2010. https://ir.uiowa.edu/etd/735.
Pełny tekst źródłaGratzer, Paul F. "The effect of chemical modification on the enzymatic degradation of acellular matrix (ACM) processed biomaterials". Thesis, National Library of Canada = Bibliothèque nationale du Canada, 1999. http://www.collectionscanada.ca/obj/s4/f2/dsk1/tape8/PQDD_0019/NQ45752.pdf.
Pełny tekst źródłaSweeney, Deacon John. "A Computational Tool for Biomolecular Structure Analysis Based On Chemical and Enzymatic Modification of Native Proteins". Wright State University / OhioLINK, 2011. http://rave.ohiolink.edu/etdc/view?acc_num=wright1316440232.
Pełny tekst źródłaRousseau, Dérick. "Modification of the physical and compositional properties of butter fat-canola oil blends by chemical and enzymatic interesterification". Thesis, National Library of Canada = Bibliothèque nationale du Canada, 1997. http://www.collectionscanada.ca/obj/s4/f2/dsk3/ftp04/nq24424.pdf.
Pełny tekst źródłaNemoto-Smith, Emi H. "Synthesis of cobalamin analogues using enzymatic and chemical modification methods, and subsequent identification of cobalamin localisation in a variety of organisms". Thesis, University of Kent, 2017. https://kar.kent.ac.uk/61694/.
Pełny tekst źródłaBaron, Kim L. "Enzymatic and chemical modifications of erythrocyte surface antigens to identify Plasmodium falciparum merozoite binding sites". Diss., University of Pretoria, 2014. http://hdl.handle.net/2263/46043.
Pełny tekst źródłaDissertation (MSc)--University of Pretoria, 2014.
tm2015
Pharmacology
MSc
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Chooi, Kok Phin. "Synthetic phosphorylation of kinases for functional studies in vitro". Thesis, University of Oxford, 2014. https://ora.ox.ac.uk/objects/uuid:2adc517a-2876-4a0b-8ead-e9bf164ebc6f.
Pełny tekst źródłaSimiand, Cécile. "Modifications régio- et stéréosélectives du saccharose". Grenoble 1, 1993. http://www.theses.fr/1993GRE10180.
Pełny tekst źródłaEid, Georges. "Nouveaux dérivés lipophiles ou amphiphiles de composés phénoliques bio-sourcés à propriétés antioxydantes, anti-inflammatoires et/ ou anti-prolifératives". Electronic Thesis or Diss., Université de Lorraine, 2022. http://www.theses.fr/2022LORR0166.
Pełny tekst źródłaThe decrease in easily accessible petrochemical resources has given over the past ten years a growing interest in the use of raw materials of renewable origin. The primary wood processing industry generates large amounts of waste each year which are currently either recycled to other sectors such as paper mills or the panel industry, or used as a source of energy, and therefore to markets with low added value. The project is situated in this context of sustainable development, circular economy and valorization of co-products of the wood industry by the exploitation of secondary metabolites present in wood, such as phenolic compounds, and more precisely flavonoids, which are indeed of interest in various fields because of their biological activities.The objective of this work is to functionalize accessible and abundant compounds in order to obtain polyfunctional compounds with 2-in-1 properties and thus be able to simplify cosmetic formulations. Functionalization has been considered by two routes: chemical hemisynthesis and/or enzymatic catalysis.By chemical hemisynthesis we were able to obtain bi-modular compounds by combining a fatty acid and a non-glycosylated flavonoid, in this case we worked with catechin. Direct acylations on the phenolic hydroxyls of catechin have been studied and the regioselectivity has been demonstrated by NMR spectroscopy and confirmed by molecular modelling. We have also obtained tri-modular compounds by chemical hemisynthesis by combining different amino acids, as well as fatty acids of variable length with catechin. Three different trimodular structures have been synthesized.By enzymatic hemisynthesis we have synthesized tri-modular compounds, from glycosylated flavonoids, rutin and narignin, aiming for the grafting of fatty acids of different chain lengths but this time on the glycosidic part of the flavonoids. We have also synthesized penta-modular compounds resulting from the grafting of a dicarboxylic acid on naringin or rutin. These compounds comprise two flavonoid entities grafted on either side of the carbon chain of the diacid.At the end of these syntheses, the physico-chemical properties of the products were studied, in particular their solubility in water, their anti-radical properties but also the surfactant properties. Some biological activities have also been studied such as antiproliferative activity against CaCo2 cells. In order to understand the effect of the structure of the compounds on their antioxidant capacity, molecular modeling work has been undertaken; correlations between the antioxidant activity of compounds determined experimentally and chemical reactivity descriptors calculated in silico were sought
Kutacova, Pavla. "Enzymatic modification of kenaf pulp". Thesis, National Library of Canada = Bibliothèque nationale du Canada, 1998. http://www.collectionscanada.ca/obj/s4/f2/dsk2/ftp01/MQ33973.pdf.
Pełny tekst źródłaMansfield, Shawn Denton. "Enzymatic modification of Douglas-fir pulp". Thesis, National Library of Canada = Bibliothèque nationale du Canada, 1998. http://www.collectionscanada.ca/obj/s4/f2/dsk2/ftp03/NQ27197.pdf.
Pełny tekst źródłaDalponte, Luca. "Chemo-enzymatic modification of cyclic peptides". Thesis, University of Aberdeen, 2018. http://digitool.abdn.ac.uk:80/webclient/DeliveryManager?pid=239393.
Pełny tekst źródłaWirth, Petra. "Enzymes en solvants organiques". Grenoble 2 : ANRT, 1988. http://catalogue.bnf.fr/ark:/12148/cb37619244x.
Pełny tekst źródła簫乃志 i Nai-chi Siu. "Enzymatic modification of oat globulin by microbial transglutaminase". Thesis, The University of Hong Kong (Pokfulam, Hong Kong), 2001. http://hub.hku.hk/bib/B31225147.
Pełny tekst źródłaSiu, Nai-chi. "Enzymatic modification of oat globulin by microbial transglutaminase". Hong Kong : University of Hong Kong, 2001. http://sunzi.lib.hku.hk/hkuto/record.jsp?B23234507.
Pełny tekst źródłaWithers, Freddie. "Chemical modification of graphene". Thesis, University of Exeter, 2012. http://hdl.handle.net/10036/4081.
Pełny tekst źródłaHolding, Finn Peter. "Chemical modification of streptavidin". Thesis, Open University, 1994. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.384989.
Pełny tekst źródłaCox, Owen. "Chemical modification of polysulfone". Thesis, University of Bath, 2013. https://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.665375.
Pełny tekst źródłaJin, Li. "Chemical modification of polymers". Thesis, Aston University, 1988. http://publications.aston.ac.uk/9706/.
Pełny tekst źródłaLiao, Rongzhen. "Quantum Chemical Cluster Modeling of Enzymatic Reactions". Doctoral thesis, Stockholms universitet, Institutionen för organisk kemi, 2010. http://urn.kb.se/resolve?urn=urn:nbn:se:su:diva-43026.
Pełny tekst źródłaQian, Xiangping. "Enzymatic and chemical synthesis of oligosaccharide analogs". Thesis, National Library of Canada = Bibliothèque nationale du Canada, 2000. http://www.collectionscanada.ca/obj/s4/f2/dsk1/tape2/PQDD_0013/NQ60015.pdf.
Pełny tekst źródłaVirden, Jane. "Chemical and enzymatic synthesis of #beta#-lactams". Thesis, University of Oxford, 1989. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.253475.
Pełny tekst źródłaLind, Maria E. S. "Quantum Chemical Modeling of Asymmetric Enzymatic Reactions". Doctoral thesis, Stockholms universitet, Institutionen för organisk kemi, 2015. http://urn.kb.se/resolve?urn=urn:nbn:se:su:diva-116694.
Pełny tekst źródłaAt the time of the doctoral defense, the following papers were unpublished and had a status as follows: Paper 3: Manuscript. Paper 4: Manuscript.
McMurray, Brian Thomas. "Chemical and enzymatic synthesis of organosulphur compounds". Thesis, Queen's University Belfast, 1993. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.359111.
Pełny tekst źródłaShepherd, S. D. "Chemical and enzymatic synthesis of organosulfur compounds". Thesis, Anglia Ruskin University, 2002. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.396225.
Pełny tekst źródłaManta, Bianca. "Quantum Chemical Studies of Enzymatic Reaction Mechanisms". Doctoral thesis, Stockholms universitet, Institutionen för organisk kemi, 2017. http://urn.kb.se/resolve?urn=urn:nbn:se:su:diva-141321.
Pełny tekst źródłaAt the time of the doctoral defense, the following paper was unpublished and had a status as follows: Paper 4: Manuscript.
Chandra, Richard P. "Chemo-enzymatic modification of high-kappa kraft pulps with laccase". Diss., Available online, Georgia Institute of Technology, 2005, 2003. http://etd.gatech.edu/theses/available/ipstetd-1011/.
Pełny tekst źródłaWashington, Benny Jr. "Enzymatic modification of synthetic mRNA's and their interaction with proteins". DigitalCommons@Robert W. Woodruff Library, Atlanta University Center, 1985. http://digitalcommons.auctr.edu/dissertations/1244.
Pełny tekst źródłaTack, Paul A. "Enzymatic production of oligosaccharides in centrifugal fields". Thesis, Aston University, 2001. http://publications.aston.ac.uk/9641/.
Pełny tekst źródłaBreakwell, I. K. "Chemical modification of smectite clays". Thesis, Aston University, 1992. http://publications.aston.ac.uk/9790/.
Pełny tekst źródłaSchofield, C. "Chemical and enzymatic synthesis of beta-lactam antibiotics". Thesis, University of Oxford, 1985. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.355775.
Pełny tekst źródłaGeorgieva, Polina. "Quantum Chemical Modeling of Enzymatic Methyl Transfer Reactions". Doctoral thesis, Stockholm : Bioteknologi, Kungliga Tekniska högskolan, 2008. http://urn.kb.se/resolve?urn=urn:nbn:se:kth:diva-9695.
Pełny tekst źródłaHamidi, Nor Hanimah. "Enzymatic depolymerization of lignin by laccases". Thesis, University of Nottingham, 2013. http://eprints.nottingham.ac.uk/14527/.
Pełny tekst źródłaXiong, Chen. "Enzymatic modification of DNA and RNA 3'-termini for click ligation". Thesis, University of Southampton, 2014. https://eprints.soton.ac.uk/367127/.
Pełny tekst źródłaHolmes, Richard James. "Chemical modification of activated carbon adsorbents". Thesis, Brunel University, 1991. http://bura.brunel.ac.uk/handle/2438/5378.
Pełny tekst źródłaSmith, Edward James. "The chemical modification of nylon 6,6". Thesis, University of Leeds, 2004. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.405743.
Pełny tekst źródłaFinch, Catherine Vanessa. "Chemical modification of skin mimic systems". Thesis, University of Huddersfield, 2017. http://eprints.hud.ac.uk/id/eprint/34645/.
Pełny tekst źródłaErdas, Yonca. "Novel chemical modification of cellulosic substrates". Thesis, University of Manchester, 2004. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.488431.
Pełny tekst źródłaKallitsis, Konstantinos. "Chemical modification of fluorinated electroactive polymers". Thesis, Bordeaux, 2019. http://www.theses.fr/2019BORD0094.
Pełny tekst źródłaOrganic electronics are a low cost alternative to silicon based electronics that nable the fabrication of flexible devices, broadening the scope of electronics beyond the limitations imposed by silicon. For organic electronics to find wider real world applications, three classes of materials have to be optimized. Those classes are conductors, semiconductors and insulators, which are the three building blocks for any electronic device. While organic conductors and semiconductors have attracted significant attention during the past 40 years, research in high dielectric constant and thus high performance insulators is lagging far behind. The class of organic insulating materials with the highest dielectric constant are the Fluorinated Electroactive Polymers (FEPs). FEPs can be categorized in two different groups with vastly different electronic properties. Those groups are the ferroelectrics and the relaxor-ferroelectrics. The ferroelectric polymers, with main representative the copolymer P(VDF-TrFE) find application in electronic devices such as sensors, actuators, non volatile memories and energy generators. On the other hand, relaxorferroelectric polymers, with main representative the P(VDF-TrFE-CTFE) terpolymer are high performance insulating materials and find application in electronics as dielectric layers, in devices such as capacitors, organic field effect transistors, flexible displays and electrocaloric cooling devices amongst others. Although the polymers mentioned above are compatible with a large variety of printing techniques, their limited compatibility with photolithography, which is the method of choice for large throughput electronics production limits their potential of realization. One of the main aims of this thesis was to alter the chemistry of such polymers, in a way that would make them directly compatible with photolithography, while maintaining their desirable electronic properties. To do so, a method allowing the introduction of additional functional groups on FEPs had to be developed. However, due to the excellent chemical stability of fluorinated polymers, developing such a method was a challenging task. The methods developed, use nucleophilic substitution to attach different functional groups on commercially available FEPs by leveraging the existence of groups prone to substitution on the polymer backbone, bypassing the innate chemical stability of such polymers. First, azido groups, known to cross-link upon irradiation with UV light were attached on relaxor ferroelectric P(VDF-TrFE-CTFE) terpolymers. The terpolymers bearing azido groups were directly used as negative photoresists in conventional photolithography process while maintaining a very high dielectric constant. Second, due to safety and stability issues, a more general approach was followed, consisting in grafting type II photoinitiators (based on aryl ketones) on the relaxorferroelectric P(VDF-TrFE-CTFE) and the ferroelectric P(VDF-TrFE) polymers. In those cases exceptionally stable polymers were obtained, with in some cases improved electroactive properties as compared to the pristine materials. These chemistries led us to an extraordinary case study, where FEPs bearing unsaturation were showing remarkable enchancement in electroactive properties. his very simple method of functionalizing FEPS paves the way to many more advances in the field
Windle, Claire Louise. "Altering enzyme activities using chemical modification". Thesis, University of Leeds, 2015. http://etheses.whiterose.ac.uk/11808/.
Pełny tekst źródłaLiu, Z. "Insight into chemical reactions : from heterogeneous to enzymatic reactions". Thesis, Queen's University Belfast, 2004. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.398116.
Pełny tekst źródłaGadre, S. R. "Bioactive molecules: chemical and enzymatic approaches to their synthesis". Thesis(Ph.D.), CSIR-National Chemical Laboratory, Pune, 1993. http://dspace.ncl.res.in:8080/xmlui/handle/20.500.12252/3072.
Pełny tekst źródłaRamos, Luiz Pereira. "Steam pretreatment and enzymatic hydrolysis of Eucalyptus viminalis chips". Thesis, University of Ottawa (Canada), 1992. http://hdl.handle.net/10393/7749.
Pełny tekst źródłaBond, Stephen P. "Interlamellar modification of smectite clays". Thesis, Aston University, 1991. http://publications.aston.ac.uk/9741/.
Pełny tekst źródłaOverton, Nigel. "Enzyme catalysed modification of polymers". Thesis, Aston University, 1998. http://publications.aston.ac.uk/9608/.
Pełny tekst źródłaNobes, Geoffrey A. R. "In vitro enzymatic synthesis and degradation of polyhydroxyalkanoates". Thesis, McGill University, 1997. http://digitool.Library.McGill.CA:80/R/?func=dbin-jump-full&object_id=37549.
Pełny tekst źródłaWith the aim of improved understanding of the mechanism of depolymerase action on water insoluble crystalline PHAs, folded chain lamellar single crystals of PHAs were partially degraded with PHA depolymerases and examined using TEM. Enzymatically degraded single crystals of bacterial PHB were found to be splintered by PHB-depolymerase A from Pseudomonas lemoignei parallel to their long axes into a needle-like morphology. These results support an "edge attack" model for the degradation of PHB single crystals and suggest that PHB-depolymerase A has both endo and exo activity. A further study was performed using single crystals of a number of PHAs which were partially degraded with depolymerases from Pseudomonas lemoignei and examined by TEM. In contrast to previous results with single crystals of bacterial PHB, the predominant effect observed with all crystals was a significant narrowing of the lamellae. This suggests an edge attack mechanism which because of lateral disorder of the crystals (caused by the introduction of valerate or repeat units of opposite stereochemistry) leads to a narrowing of the crystalline lamellae as opposed to the splintering effect previously observed.
Cetin, Nihat S. "Surface activation of lignocellulosics by chemical modification". Thesis, Bangor University, 1999. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.298633.
Pełny tekst źródłaHagan, Andrew Kevin. "The chemical modification of the lantibiotic mersacidin". Thesis, University of Manchester, 2009. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.496643.
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