Relevant bibliographies by topics / Bioconversion / Dissertations / Theses
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Dissertations / Theses on the topic 'Bioconversion'

Author: Grafiati
Published: 4 June 2021
Last updated: 25 July 2025

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1

Lind, Aingy Chantel. "Bioconversion of alkylbenzenes by Yarrowia lipolytica." Thesis, Stellenbosch : University of Stellenbosch, 2009. http://hdl.handle.net/10019.1/1809.

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Thesis (MScEng (Process Engineering))--University of Stellenbosch, 2009.<br>The abundance of alkane by-products formed in South Africa presents a feedstock opportunity for the production of a wide range of commercially important products, such as long-chain dioic acids and alcohols. These compounds are formed as intermediates through the biological conversion of alkanes, a route which is particularly attractive when compared with chemical conversion due to its operation under milder process conditions. Furthermore, advances in genetic manipulation, which enable the accumulation of a rang
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2

Pais, Joana Oliveira. "Bioconversion of cheese whey into polyhydroxyalkanoates." Doctoral thesis, Faculdade de Ciências e Tecnologia, 2013. http://hdl.handle.net/10362/12043.

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3

BOUTUR, OLIVIER. "Essais de production d'emulsifiants par bioconversion." Montpellier, ENSA, 1995. http://www.theses.fr/1995ENSA0027.

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Ce travail s'inscrit dans le cadre de la valorisation non alimentaire des huiles vegetales et plus particulierement de la production d'emulsifiants par bioconversion. La lipase 1(3)-regiospecifique de candida deformans s'est averee capable de catalyser l'esterification d'acides gras et d'alcools primaires en milieu aqueux (activite de l'eau superieure a 0,8). La production d'esters a partir d'huile resulte donc des deux reactions suivantes: l'hydrolyse des triglycerides et la synthese d'esters a partir des acides gras liberes. Les conditions reactionnelles optimales pour les deux reactions et
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4

Lapadatescu, Carmen. "Production de benzaldéhyde naturel par bioconversion." Dijon, 1999. http://www.theses.fr/1999DIJOS037.

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L'objectif principal de ces travaux était de définir les meilleures conditions de culture et d'étudier le mécanisme de biosynthèse permettant la production de benzaldéhyde (arome d'amande amère) par voie biotechnologique à partir d'un précurseur (la L-phénylalanine). Un screening préliminaire nous a conduit à retenir Berkandera adusta, Ischnoderma benzoïnum et Dichomitus squalens en raison de leur capacité a produire des métabolites aromatiques (le benzaldéhyde et l'alcool benzylique). L'immobilisation de B. Adusta sur des mousses hydrophobes de polyuréthane a permis de multiplier par 8 la pro
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5

Hugueny, Patricia. "Production de cetone framboise naturelle par bioconversion." Dijon, 1995. http://www.theses.fr/1995DIJOS038.

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Ces travaux portent sur la production de cetone framboise naturelle par bioconversion. Ce composé, essentiel pour l'arome de framboise, ne peut être extrait des fruits et vegetaux qui le contiennent en raison de sa teneur trop faible (quelques mg par kg au maximum). Dans le schéma de bioconversion envisagé, la cetone framboise est obtenue à partir d'un precurseur naturel: le betuligenol. Celui-ci est generalement derive de son glucoside: le betuloside. Ces deux composes sont presents chez divers vegetaux dont le bouleau qui est la source vegetale retenue. L'extraction du betuloside des ecorces
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6

Woolston, Benjamin Michael. "Enabling Cl-Based bioconversion with metabolic engineering." Thesis, Massachusetts Institute of Technology, 2017. https://hdl.handle.net/1721.1/127713.

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Thesis: Ph. D., Massachusetts Institute of Technology, Department of Chemical Engineering, May, 2017<br>Cataloged from the official PDF of thesis.<br>Includes bibliographical references (pages 235-261).<br>Single-carbon (C) substrates, such as synthesis gas and methanol, are attractive feedstocks for biochemical processes, as they are widely available, can be produced renewably, and do not compete with food supply. However, their use in industrial bioprocessing remains limited, primarily because microbes that utilize these substrates are poorly characterized biochemically, and limited tools ex
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7

Ibenegbu, Christopher Chinwendu. "Bioconversion of brewery spent grains for animal feeds." Thesis, Royal Holloway, University of London, 2007. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.444204.

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8

Fabre, Cathy. "Nouveaux procédés de production d'arômes naturels par bioconversion." Toulouse, INSA, 1996. http://www.theses.fr/1996ISAT0012.

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La bioconversion de la phenylalanine (2 g/l) par ischnoderma benzoinum conduit principalement a la synthese de benzaldehyde, arome d'amande amere et de 2-phenylethanol, arome de rose, dont les concentrations atteignent respectivement 160 et 360 mg/l, au bout de 28 jours d'incubation. L'assimilation de cet acide amine par kluyveromyces marxianus entraine une production maximale de 1,3 g/l de 2-phenylethanol en 8 jours, qui provoque l'inhibition de la croissance de cette levure. La mise en uvre d'un chemostat, alimente par un milieu enrichi en 2-phenylethanol a des concentrations croissantes, a
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9

Aliyu, Malami. "Philosophy and strategy for bioconversion of cellulosic materials." Thesis, Glasgow Caledonian University, 2002. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.395795.

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10

Santiago, Bárbara Luiza Silva. "Avaliação do tratamento alcalino do bagaço de malte e seu efeito sobre a bioconversão das frações açucaradas em etanol." Universidade de São Paulo, 2013. http://www.teses.usp.br/teses/disponiveis/97/97132/tde-14092016-163033/.

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O presente trabalho se propôs a avaliar o efeito de uma etapa de tratamento alcalino no bagaço de malte visando à extração de acetato e de compostos fenólicos, e como consequência diminuir a concentração destes no hidrolisado hemicelulósico. Foi ainda objetivo deste trabalho, estudar o efeito do tratamento alcalino na bioconversão das frações celulósica e hemicelulósica do bagaço de malte, por meio de fermentação com as leveduras Kluyveromyces marxianus e Pichia stipitis, respectivamente. Os resultados mostraram que para todas as condições de tratamento alcalino avaliadas, ocorreu solubilizaçã
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11

Du, C. "Bioconversion of lignin degradation products into value-added chemicals." Thesis, University College London (University of London), 2014. http://discovery.ucl.ac.uk/1425468/.

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Lignin is an essential component of the cell wall of various types of plants and represents an abundant and renewable natural resource. Both thermo-chemical and biological pre-treatment can be applied to break down the strong ether bonds and phenylpropanoid polymer subunits present in lignin. These liberate a range of phenolic compounds which represent potential substrates for bioconversion by ω-transaminases (ω-TAm). In this work the utility of the CV2025 ω-TAm from Chromobacterium violaceum DSM30191 is explored for selective amination of lignin breakdown intermediates into value-added produc
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12

Kudina, Olena. "Responsive Polymer-Based Colliods for Drug Delivery and Bioconversion." Diss., North Dakota State University, 2014. https://hdl.handle.net/10365/27552.

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Responsive polymer-based colloids (RPBC) are the colloidal structures containing responsive polymeric component which is able to adapt its physico-chemical properties to the environment by undergoing chemical and/or conformational changes. The goal of the dissertation is to develop and characterize several groups of RPBC with different morphological complexity and explore their potential in drug delivery and bioconversion. The role of RPBC morphology for these specific applications is discussed in details. Three groups of RPBC were fabricated: i. polymeric micelles; ii. mixed polymeric micell
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13

EVEN, LUC FRANCOIS. "Etude de la bioconversion dethiobiotine-biotine : synthese d'intermediaires biosynthetiques." Paris 6, 1990. http://www.theses.fr/1990PA066131.

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La derniere etape de la biosynthese de la biotine, c'est-a-dire, la transformation de la dethiobiotine en biotine pose le probleme du mode d'introduction d'un atome de soufre entre deux atomes de carbone non actives. Afin de determiner le donneur de soufre et le mecanisme enzymatique, des intermediaires biosynthetiques potentiels ont ete synthetises et seront, par la suite, testes avec des microorganismes. Afin de verifier l'hypothese du passage par un intermediaire thiol primaire provenant de l'insertion du soufre sur le groupe methyle de la dethiobiotine et qui conduirait, apres cyclisation,
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14

Richard, Christophe. "Recherches sur la production d'anthranilate de methyle par bioconversion." Dijon, 1989. http://www.theses.fr/1989DIJOS042.

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15

Thiault, Georges-André. "Bioconversion de molécules aromatiques et hétérocycliques par les micromycètes." Université Joseph Fourier (Grenoble), 1992. http://www.theses.fr/1992GRE18002.

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16

Salakkam, Apilak. "Bioconversion of biodiesel by-products to value-added chemicals." Thesis, University of Manchester, 2012. https://www.research.manchester.ac.uk/portal/en/theses/bioconversion-of-biodiesel-byproducts-to-valueadded-chemicals(93d98c7a-bba3-4441-8a50-a6ce4cb73427).html.

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To mitigate the problems of depleting and soaring price of fossil fuels, the production and use of renewable energy have been vigorously promoted. In Europe, the role of biologically-derived fuels and in particular biodiesel is gradually increasing in prominent. Rapeseed biodiesel is the most widely produced in Europe. As a consequence, enormous amount of by-products from production processes are being generated. Current strategies for managing these by-products (mainly rapeseed meal and crude glycerol) seem not to be economically sustainable. More efficient utilisation could add more value to
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17

Mitchell, Anthony Frank. "An investigation into the microbial bioconversion of cellulosic waste." Thesis, University of Central Lancashire, 1986. http://clok.uclan.ac.uk/19063/.

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A low technology fermentation system for biodegradation of cellulose based waste material is described. Using a substrate of thermally bonded paper plastic laminate in a defined mineral salts medium the cellulolytic nicrofungus Trichoderma viride XXI 2% 458 was shown to effect the separation of the laminate into its components by enzymic degradation of the paper. This aerobically induced separation occurred within 14 days compared to upto 90 days by purely physical means. Growth of the fungus within the fermentation system was found to provide conditions that control the growth of contaminatin
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18

Lambert, Fanny. "Procédés de biosynthèse de composés phénoliques dérivés de la vanilline par bioconversion d'eugénol." Thesis, Strasbourg, 2013. http://www.theses.fr/2013STRAJ116.

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La vanillyl alcool oxydase est un biocatalyseur prometteur d’un point de vue réactionnel en raison de sa faible sélectivité sur les composés phénoliques substitués en position para. Elle catalyse l’oxydation d’une large gamme de dérivés 4-hydroxybenzylique, des réactions de déméthylation oxydative, de désamination, de déshydrogénation et d’hydroxylation ; notamment celle de l’eugénol. L’hydroxylation de ce dernier conduit à la formation d’alcool coniférylique. Dans le but d’utiliser l’eugénol comme substrat de biosytnhèse de dérivés vanilliques, nous avons développé, au cours de ce travail de
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19

Ghizzi, Damasceno da Silva Gabriela. "Fractionnement par voie sèche de la biomasse ligno-cellulosique : broyage poussé de la paille de blé et effets sur ses bioconversions." Thesis, Montpellier, SupAgro, 2011. http://www.theses.fr/2011NSAM0031/document.

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Dans le contexte de la bioraffinerie végétale pour la production de molécules et d'énergie, des prétraitements sont nécessaires pour augmenter la réactivité de la biomasse ligno-cellulosique. Cette thèse s'insère dans une thématique dont l'objectif général est d'établir les bases d'une raffinerie du végétal par des procédés par voie sèche. Cette étude a pour objectif de développer et comprendre le fractionnement mécanique poussé de la paille de blé jusqu'à des tailles sub-millimétriques et d'évaluer les effets sur des procédés de bioconversions énergétiques. La paille de blé présente une grand
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20

Bou, Saab Hamid. "Bioconversion éco-compatible de triterpénoïdes par des bactéries immobilisées sur Luffa cylindrica." Phd thesis, Université de Haute Alsace - Mulhouse, 2011. http://tel.archives-ouvertes.fr/tel-00704061.

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L'un des avantages majeurs des réactions de bioconversion résulte du fait que le milieu réactionnel des biocatalyseurs est l'eau. Ce dit avantage constitue l'une des principales limitations de ces réactions de bioconversion lorsqu'il s'agit de substances lipophiles non solubles dans l'eau connue les stérols. L'efficacité d'un procédé de bioconversion de substances lipophiles solides dépend essentiellement du contact et de 1'interaction entre le biocatalyseur et ce substrat lipophile. Les solutions proposées dans la littérature font appel à des solvants et des produits chimiques de natures souv
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21

Zhu, Yongming. "Bioconversion of corn stover into value-added chemicals dilute sulfuric acid pretreatment, xylo-oligosaccharides production, and lactic acid fermentation /." Auburn, Ala, 2005. http://repo.lib.auburn.edu/2005%20Fall/Dissertation/ZHU_YONGMING_0.pdf.

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22

Vaughan, P. A. "The conversion of 3-cyanopyridine to nicotinic acid by Nocardia rhodochrous." Thesis, University of Kent, 1986. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.373159.

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23

Ayhan, Peruze. "Novel Bioconversion Reactions For The Syntheses Of A-hydroxy Ketones." Phd thesis, METU, 2009. http://etd.lib.metu.edu.tr/upload/3/12610354/index.pdf.

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The objective of the study presented here was to develop either enzymatic or whole cell mediated green procedures for the syntheses of a-hydroxy ketones. Production of optically active synthons is crucial for the preparation of fine chemicals. Enzymes and whole-cell biocatalysts have proven to be excellent vehicles with their chiral nature for the biotransformations. Under the light of this discussion, firstly benzaldehyde lyase [BAL, (EC 4.1.2.38)] was used in novel C-C bond formation reactions to obtain interesting and biologically important precursors<br>2-Hydroxy-1-arylethan-1-ones and fun
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24

Rismani-Yazdi, Hamid. "Bioconversion of cellulose into electrical energy in microbial fuel cells." Columbus, Ohio : Ohio State University, 2008. http://rave.ohiolink.edu/etdc/view?acc%5Fnum=osu1211313869.

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25

Pott, Robert William McClelland. "The bioconversion of waste glycerol into hydrogen by Rhodopseudomonas palustris." Thesis, University of Cambridge, 2014. https://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.708006.

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26

Treadway, Sheri L. (Sheri Lynn) 1970. "Molecular genetic analysis of indene bioconversion in Rhodococcus strain I24." Thesis, Massachusetts Institute of Technology, 1999. http://hdl.handle.net/1721.1/85284.

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27

Zhan, Xiaobei. "Improving sorghum bioconversion rate for ethanol and lactic acid production /." Search for this dissertation online, 2004. http://wwwlib.umi.com/cr/ksu/main.

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28

Longanesi, Luca <1986&gt. "Bioconversion of Agro-Food Wastes into Biofuels and Biobased Chemicals." Doctoral thesis, Alma Mater Studiorum - Università di Bologna, 2016. http://amsdottorato.unibo.it/7388/1/Longanesi_Luca_tesi.pdf.

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In this work, different biorefineries strategies were used in order to produce different fuels and chemicals from agro – industrial by product, focusing in particularly on microbial fermentation processes. Mixed consortia and pure culture of Thermotoga neapolitana were used to produce biomethane (through anaerobic digestion) and biohydrogen, respectively from grape pomace and milk whey. Due to the lignocellulosic nature of this by products, white and red grape pomaces in the anaerobic digestion process were tested alone, or in co – digestion, in batch, fed – batch and continuous tests in a 29
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Longanesi, Luca <1986&gt. "Bioconversion of Agro-Food Wastes into Biofuels and Biobased Chemicals." Doctoral thesis, Alma Mater Studiorum - Università di Bologna, 2016. http://amsdottorato.unibo.it/7388/.

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In this work, different biorefineries strategies were used in order to produce different fuels and chemicals from agro – industrial by product, focusing in particularly on microbial fermentation processes. Mixed consortia and pure culture of Thermotoga neapolitana were used to produce biomethane (through anaerobic digestion) and biohydrogen, respectively from grape pomace and milk whey. Due to the lignocellulosic nature of this by products, white and red grape pomaces in the anaerobic digestion process were tested alone, or in co – digestion, in batch, fed – batch and continuous tests in a 29
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30

SCIEUZO, CARMEN. "Use of organic materials to obtain valuable products through bioconversion." Doctoral thesis, Università degli studi della Basilicata, 2021. http://hdl.handle.net/11563/146471.

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Bioconversion is a biological process by which organic materials are converted in products with higher biological and commercial value. During its larval stage, the Black Soldier Fly (BSF), Hermetia illucens (L.) (Diptera: Stratiomyidae), is extremely voracious and able to feed on a wide range of organic materials, ranging from fruits and vegetables to animal manure. This ethological characteristic is particularly interesting for an innovative waste management treatment. The bioconversion process is highly efficient, as the organic substance the larva feeds on is reduced up to 65%-70% and conv
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31

Lander, Kathryn Siobhan. "In-situ product recovery from a Baeyer-Villiger monooxygenase catalysed bioconversion." Thesis, University College London (University of London), 2003. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.405370.

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32

Quinn, Henry Patrick Joseph. "The microbial degradation and bioconversion of animal fats from abbatoir waste." Thesis, University of Hertfordshire, 1989. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.329290.

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33

Griessel, Wilmare. "Anaerobic bioconversion of the organic fraction from the fruit processing industry." Thesis, Stellenbosch : Stellenbosch University, 2002. http://hdl.handle.net/10019.1/52651.

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Thesis (MSc Food Sc )--Stellenbosch University, 2002.<br>ENGLISH ABSTRACT: South Africa is a developing country that relies heavily on its agricultural sector for economical welfare especially in the Western Cape Province. However, development gives rise to new technologies, new products, economical stability and unfortunately also to the production of larger volumes of liquid and solid waste. Anaerobic composting is becoming a very attractive treatment option for solid waste disposal because of its unique operational advantages and two valueadded by-products, compost and biogas. Over
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de, Kock Michelle. "Anaerobic bioconversion of liquid and solid wastes from the winemaking process." Thesis, Stellenbosch : Stellenbosch University, 2015. http://hdl.handle.net/10019.1/96771.

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Thesis (MSc Food Sc)--Stellenbosch University, 2015.<br>ENGLISH ABSTRACT: South Africa is a developing country that relies on its agricultural sector as a main source of overall economic welfare. Development does not only give rise to new technology and new products but also results in increased amounts of liquid and solid waste. Generally, the production of wine is considered an environmentally friendly process, but significant amounts of natural resources and organic amendments are necessary, while generating large amounts of liquid and solid wastes. Anaerobic digestion (AD) is an attra
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Fukui, Toshiaki. "STUDIES ON THE BIOCONVERSION OF ORGANOSILICON COMPOUNDS BY DEHYDROGENASE AND HYDROLASE." Kyoto University, 1994. http://hdl.handle.net/2433/168888.

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本文データは平成22年度国立国会図書館の学位論文(博士)のデジタル化実施により作成された画像ファイルを基にpdf変換したものである<br>Kyoto University (京都大学)<br>0048<br>新制・課程博士<br>博士(工学)<br>甲第5707号<br>工博第1353号<br>新制||工||946(附属図書館)<br>UT51-94-J139<br>京都大学大学院工学研究科工業化学専攻<br>(主査)教授 田中 渥夫, 教授 内本 喜一朗, 教授 伊藤 嘉彦<br>学位規則第4条第1項該当
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Kumi, Philemon James. "Improving the bioconversion of lignocellulosic feedstock to bio-fuels and chemicals." Thesis, University of South Wales, 2015. https://pure.southwales.ac.uk/en/studentthesis/improving-the-bioconversion-of-lignocellulosic-feedstock-to-biofuels-and-chemicals(7088d092-fb93-4d70-ba3d-1abb233e33e3).html.

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This study investigated the fate of lignocellulosic biomass (wheat-feed and perennial rye grass) in different anaerobic digestion systems, evaluating the role of substrate specificity on the pattern of degradation. The two-stage (biohydrogen-biomethane) anaerobic system was found to be more effective in the degradation of lignocellulose, when compared to the conventional single-stage system. The perennial rye grass substrate possessed about 21% higher holocellulose concentration when compared to the wheat-feed; its exploitation in the acidogenic digestion was however poor, resulting in a 2.9%
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Furlan, Sandra Aparecida. "Contribution à l'étude de la bioconversion du xylose par les levures." Toulouse, INPT, 1991. http://www.theses.fr/1991INPT017G.

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Dans le cadre de la valorisation de la biomasse lignocellulosique, la bioconversion du d-xylose en ethanol et en xylitol est envisagee. Dans un premier temps nous avons choisi, parmi un echantillonnage de souches connues capables de metaboliser le d-xylose, les souches les plus performantes pour la production d'ethanol pichia stipitis et de xylitol candida parapsilosis. Ensuite nous nous sommes interesses a l'etude des facteurs limitants de la reaction xylose-xylitol: il ressort de cette etude que la limitation par l'oxygene est le facteur clef de la production; les conditions ideales d'aerati
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Rojas, Ortúzar Ilse. "Bioconversion Of Lignocellulosic Components Of Sweet Sorghum Bagasse Into Fermentable Sugars." Diss., The University of Arizona, 2015. http://hdl.handle.net/10150/555836.

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The utilization of lignocellulosic residues to produce renewable energy is an interesting alternative to meet the increasing demand of fuels while at the same time reducing greenhouse gas emissions and climate change. Sweet sorghum bagasse is a lignocellulosic residue composed mainly of cellulose, hemicellulose, and lignin; and it is a promising substrate for ethanol production because its complex carbohydrates may be hydrolyzed and converted into simple sugars, and then fermented into ethanol. However, the utilization of lignocellulosic residues is difficult and inefficient. Lignocellulose is
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Pandey, Rohit. "Changes in properties of coal as a result of continued bioconversion." OpenSIUC, 2015. https://opensiuc.lib.siu.edu/theses/1745.

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Microbial actions on coal have long been identified as a source of methane in coalbeds. Andrew Scott (1995) was the first to propose imitating the natural process of biogenic gasification, possibly leading to recharging coalbed methane (CBM) reservoirs, or setting up natural gas reservoirs in non-producing coalbeds. This study was aimed at identifying the changes in coal properties that affect gas deliverability in coal-gas reservoirs, when treated with microbial consortia to generate/enhance gas production. The experimental work tested the sorption and diffusion properties for the coal treate
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Wagh, Shilpa A. "Bioconversion of tannic acid to gallic acid by using fungal tannase." Thesis(Ph.D.), CSIR-National Chemical Laboratory, Pune, 2010. http://dspace.ncl.res.in:8080/xmlui/handle/20.500.12252/3759.

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41

Mutafela, Richard Nasilele. "High Value Organic Waste Treatment via Black Soldier Fly Bioconversion : Onsite Pilot Study." Thesis, KTH, Industriell ekologi, 2015. http://urn.kb.se/resolve?urn=urn:nbn:se:kth:diva-176835.

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The desire for value addition to the organic waste management chain at Högbytorp using the Black Soldier Fly (BSF) process, as well as the problem of the escalating demand for protein in livestock feed motivated this study. Good quality crop land is devoted to growing feed for animals at the expense of human food, and ironically with a full understanding of the associated environmental footprints. Black Soldier Fly Larvae (BSFL) feed on organic waste voraciously while building their body composition of 40% protein and 30% fat. Their protein can be used in animal feedstock and pet food, replac
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Duedu, Kwabena Obeng. "Development of novel systems for bioconversion of cellulosic biomass to useful products." Thesis, University of Edinburgh, 2016. http://hdl.handle.net/1842/15903.

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There is increasing concern regarding alternative, sustainable energy sources, such as biofuels, to replace declining oil reserves. The abundance of lignocellulosic biomass makes it the only imaginable resource that can potentially substitute a substantial portion of the fossil fuels we use today, but current methods for producing biofuels from non-food crops are cost intensive and not economically viable. Synthetic biology provides several potential approaches for developing biologically mediated processes for the conversion of lignocellulosic biomass into biofuels. Such systems are based on
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Kim, Tae Hyun Lee Yoon Y. "Bioconversion of lignocellulosic material into ethanol pretreatment, enzymatic hydrolysis, and ethanol fermentation /." Auburn, Ala., 2004. http://repo.lib.auburn.edu/EtdRoot/2004/FALL/Chemical_Engineering/Dissertation/KIM_TAE_24.pdf.

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44

Schiavone, Drew F. "Heat and Mass Transfer in Baled Switchgrass for Storage and Bioconversion Applications." UKnowledge, 2016. http://uknowledge.uky.edu/bae_etds/41.

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The temperature and moisture content of biomass feedstocks both play a critical role in minimizing storage and transportation costs, achieving effective bioconversion, and developing relevant postharvest quality models. Hence, this study characterizes the heat and mass transfer occurring within baled switchgrass through the development of a mathematical model describing the relevant thermal and physical properties of this specific substrate. This mathematical model accounts for the effect of internal heat generation and temperature-induced free convection within the material in order to improv
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Mingotaud, Anne Françoise. "Etude de la bioconversion dethiobiotine-biotine : synthèse d'un intermédiaire biosynthétique deutere stéréospécifiquement." Paris 6, 1989. http://www.theses.fr/1989PA066629.

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Cette thèse a pour objet l'étude de la dernière étape de la biosynthèse de la biotine, i. E. La bioconversion déthiobiotine-biotine. Un intermédiaire de type thiol primaire est envisagé; il s'agit ici de vérifier si ce thiol est transformé en biotine selon la même stéréochimie que la déthiobiotine. Une synthèse de ce thiol deutere stereospecifiquement a donc été mise au point. Dans un premier tems, la stratégie de la synthèse et l'introduction du deuterium sont décrites. L'acyne correspondant à la chaine carbonée du thiol est synthétisé à partir du cyclohexene et l'on envisage de construire le
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46

Igbinigie, Eric Egbe. "The rhizosphere as a bioprocess environment for the bioconversion of hard coal." Thesis, Rhodes University, 2008. http://hdl.handle.net/10962/d1003983.

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Fundamental processes involved in the microbial degradation of coal and its derivatives have been well investigated and documented over the past two decades. However, limited progress in industrial application has been identified as bottleneck in further active development of the field. The sporadic and unanticipated growth of Cynodon dactylon (Bermuda grass) has been observed on the surface of some coal dumps in the Witbank coal mining area of South Africa. Preliminary investigations showed the formation of a humic soil-like material from the breakdown of hard coal in the root zone of these p
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Hood, Colette Michelle. "Microbial degradation of wool and feather keratins." Thesis, Queen's University Belfast, 1994. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.286780.

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48

Fosse, Céline. "Clivage oxydatif de quinones hétérocycliques par voie microbiologique." Paris 6, 2003. http://www.theses.fr/2003PA066120.

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Gavira, Carole. "Production de terpènes fonctionnalisés par les cytochromes P450 de plantes recombinants." Thesis, Strasbourg, 2013. http://www.theses.fr/2013STRAJ009/document.

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Notre objectif était d’identifier des cytochromes P450 capables d’oxygéner des mono et sesquiterpènes, pour produire des molécules aux propriétés organoleptiques intéressantes labellisés « naturelles » par l’industrie des arômes et du parfum.Nous avons identifié 7 couples P450-substrat catalysant une conversion in vitro supérieure ≥ 45 % et/ou formant un produit attendu. Les quantités de produit obtenu par bioconversion dans la levure restent insuffisantes pour un procédé industriel. Les facteurs limitants ont été identifiés dans le cas du valencène comme : 1) la toxicité induite par les produ
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Olvera, Vargas Hugo. "Study on the fate of pharmaceuticals in aqueous media : synthesis, characterization and detection of biotic and abiotic transformation products using electrochemical advanced oxidation processes and bioconversions." Thesis, Paris Est, 2014. http://www.theses.fr/2014PEST1179/document.

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La pollution des eaux superficielles et souterraines par des composés organiques est bien connue comme une préoccupation majeure de l'environnement dans de nombreux pays. Si les polluants prioritaires sont actuellement surveillés par la directive cadre européenne sur l'eau, il est désormais urgent de prendre en considération les nouveaux polluants dérivés de principes actifs des produits pharmaceutiques et d'identifier leurs produits de transformation à risque. Ce travail de thèse propose une étude globale sur l'état et l'avenir des produis pharmaceutiques dans l'environnement, sur l'exemple d
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