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Dissertations / Theses on the topic 'Vegetable oils'

Author: Grafiati

Published: 4 June 2021

Last updated: 25 July 2025

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1

Ramos, Boris. "Production of biodiesel from vegetable oils." Thesis, KTH, Skolan för kemivetenskap (CHE), 2012. http://urn.kb.se/resolve?urn=urn:nbn:se:kth:diva-145863.

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The production of biodiesel using vegetables oils is studied. Palm oil and its use for production of biodiesel have been focused. Palm tree is very productive and one of the most profitable for biodiesel production. Among the oilseed crops palm tree produce more oil per hectare. Palm oil has a good availability and a competitive price. The production of palm oil at the industrial plantation level has caused environmental damage. The Roundtable on Sustainable Palm Oil has established principles and criteria in order to certify a sustainable cultivation of the palm oil. The experimental work inv

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2

Sacchetti, Annalisa <1994&gt. "Catalytic hydrogenation of vegetable oils derivatives." Doctoral thesis, Alma Mater Studiorum - Università di Bologna, 2022. http://amsdottorato.unibo.it/10070/1/Sacchetti%20Annalisa_final%20upload%20.pdf.

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During this project the catalytic hydrogenation of a mixture of fatty acids derivatives was performed in two different reactors (discontinuous batch and continuous flow); the attention was pointed out on the type of the catalyst employed, involving a screening among different noble metals and support with optimization of the reaction parameters. Interesting results were obtained in batch reactions with 0.3% wt Pd/C at 4 bar of H2 and 90°C, ensuring full conversion of the starting material and complete selectivity towards the saturated compounds. An insight of the kinetics of the reaction was

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3

Roy, Dibakar. "Modification of vegetable oils as a potential base oil and a multifunctional lube oil additive." Thesis, University of North Bengal, 2021. http://ir.nbu.ac.in/handle/123456789/4365.

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4

Good, Joanne Elizabeth. "Replacement of dietary fish oil with vegetable oils : effects on fish health." Thesis, University of Stirling, 2004. http://hdl.handle.net/1893/2005.

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The work presented in this thesis examined the effects of dietary fish oil replacement on fish innate and adaptive immune function, disease resistance tissue histopathology and fatty acid composition of lipids in peripheral blood leukocytes. Dietary trials with Atlantic salmon (Salmo salar), Sea bass (Dicentrarchus labrax), Atlantic cod (Gadus morhua) and Arctic char (Salvelinus alpinus) were conducted in which fish oil was replaced by rapeseed oil, linseed oil, olive oil, palm oil, echium oil or a mixture of these oils. A significant reduction in respiratory burst activity was most pronounced

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5

Lligadas, Puig Gerard. "Biobased thermosets from vegetable oils. Synthesis, characterization and properties." Doctoral thesis, Universitat Rovira i Virgili, 2006. http://hdl.handle.net/10803/9007.

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Biobased Thermosets from Vegetable Oils. Synthesis, Characterization, and Properties<br/><br/>Gerard Lligadas Puig<br/><br/><br/>El desenvolupament sostenible va esdevenir com una de les idees claus del segle 20. S'entén per desenvolupament sostenible aquell tipus de desenvolupament que és capaç de satisfer les necessitats actuals sense comprometre els recursos i possibilitats de les futures generacions. Per assolir un desenvolupament sostenible és necessari promoure un desenvolupament social i econòmic pendent en tot moment del medi ambient.<br/> <br/>La conservació i la gestió dels residus é

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6

Fernandes, Vanda Filipa Silva. "Characterization of biodiesels produced from mixtures of vegetable oils." Master's thesis, Universidade de Aveiro, 2010. http://hdl.handle.net/10773/3141.

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Mestrado em Engenharia Química<br>Nos últimos anos o biodiesel tem recebido uma atenção notável devido à sua capacidade de substituir os combustíveis fósseis. É considerado um amigo do ambiente, devido às suas imensas vantagens. Este biocombustível é obtido a partir de recursos renováveis, portanto é considerado biodegradável, CO2-neutro, nãotóxico e reduz significativamente as emissões gasosas com efeito de estufa. É composto por uma mistura de ésteres mono alquílicos obtidos a partir de óleos vegetais, tais como, o óleo de soja, óleo de jatropha, óleo de colza, óleo de palma, óleo de girasso

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7

Valverde, Marlen A. "Green plastics, rubbers, coatings, and biocomposites from vegetable oils." [Ames, Iowa : Iowa State University], 2009. http://gateway.proquest.com/openurl?url_ver=Z39.88-2004&rft_val_fmt=info:ofi/fmt:kev:mtx:dissertation&res_dat=xri:pqdiss&rft_dat=xri:pqdiss:3389154.

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8

Myint, Lay L. "Process analysis and optimization of biodiesel production from vegetable oils." [College Station, Tex. : Texas A&M University, 2007. http://hdl.handle.net/1969.1/ETD-TAMU-1267.

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9

Gamage, Padmasiri Kankanam. "Use of selected vegetable oils as plasticiser/stabiliser for PVC." Thesis, London Metropolitan University, 2009. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.507082.

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10

Hu, Chaohe. "Versatile biobased particles of acrylate vegetable oils : Synthesis and applications." Thesis, université Paris-Saclay, 2022. http://www.theses.fr/2022UPAST081.

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Depuis ses débuts, au début des années 1920, l'industrie des polymères dépend fortement des ressources en combustibles fossiles. Environ 4 à 8 % du pétrole, du gaz et de leurs dérivés sont aujourd'hui transformés en matériaux polymères. La plupart d'entre eux sont non recyclables et non dégradables, ce qui entraîne de graves problèmes environnementaux, préjudiciables à la faune et à l'homme. Dans ce contexte, il est nécessaire de développer des produits polymères alternatifs qui, à partir de matières premières renouvelables, présenteront le même niveau de complexité que les produits actuels is

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11

Piccolo, Damiano. "Epoxidation of vegetable oils by conventional and non-conventional methods." Doctoral thesis, Università degli studi di Padova, 2020. http://hdl.handle.net/11577/3425915.

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The interest on epoxidised vegetable oils has been increasing in the last years thanks to their use as renewable and sustainable resource for a wide range of environmental-friendly and sustainable chemicals. The aim of this work is producing epoxidised soybean oil in newer, safer and more efficient ways. This PhD thesis is structured according to different experimental approaches, supported by a kinetic and mass transfer modelling to enable a complete understanding of the phenomena. The epoxidation process was carried out in two phases via peroxyacetic acid, produced by the reaction between ac

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12

McLellan, Jill Fraser. "Ene addition reactions involving jojoba bean oil, triglyceride vegetable oils and synthetic lubricant fluids." Thesis, University of Edinburgh, 1995. http://hdl.handle.net/1842/11137.

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Ene addition reactions involving jojoba bean oil (a wax ester), sunflower oil (a triglyceride) and the synthetic fluids polyisobutene and polyalphaolefin have been investigated. Several enophiles have been employed, including azo compounds [diethyl azodicarboxylate (DEAD), 4-phenyl-1-1,2,4-triazoline-3,5-dione (PTAD) and 4-methyl-1,2,4-triazoline-3,5-dione (MTAD)], a sulfinyl compound [<I>N</I>-sulfinyl-<I>p</I>-toluenesulfonamide (TosNSO)] and formaldehyde. In order to investigate the scope of these reactions, and to gain spectral information for use in the analysis of more complex product mi

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13

Tabee, Elham. "Lipid and phytosterol oxidation in vegetable oils and fried potato products /." Uppsala : Department of Food Science, Swedish University of Agricultural Sciences, 2008. http://epsilon.slu.se/200892.pdf.

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14

Trullàs, Huguet Clara. "Used of acid and re-esterified vegetable oils in fish diets." Doctoral thesis, Universitat Autònoma de Barcelona, 2016. http://hdl.handle.net/10803/368235.

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La utilització d’olis natius d’origen vegetal (VO) en dietes per peixos com a substituts de la font lipídica tradicionalment utilitzada, l’oli de peix (FO), es veu limitada degut a la creixent demanda per part de les indústries de pinsos, aliments i biocombustibles. Els olis àcids són un subproducte ric en àcids grassos lliures provinent del procés de refinació d’olis vegetals que poden ser fonts alternatives interessants a la utilització d’VO. Malgrat això, la seva utilització com a font lipídica en dietes per animals monogàstrics presenta controvèrsia. Els olis àcids vegetals poden ser re-e

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15

Castagnino, Pablo de Souza [UNESP]. "In vitro fermentation parameters and biohydrogenation of vegetable oils without glycerol." Universidade Estadual Paulista (UNESP), 2014. http://hdl.handle.net/11449/113760.

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Made available in DSpace on 2015-01-26T13:21:11Z (GMT). No. of bitstreams: 0 Previous issue date: 2014-02-26Bitstream added on 2015-01-26T13:31:04Z : No. of bitstreams: 1 000803371.pdf: 600837 bytes, checksum: 850c380a2ac98e37fd93bb85fc37039a (MD5)<br>Conselho Nacional de Desenvolvimento Científico e Tecnológico (CNPq)<br>Fundação de Amparo à Pesquisa do Estado de São Paulo (FAPESP)<br>O glicerol combinado com óleos vegetais poderia limitar a intensa biohidrogenação dos ácidos graxos de cadeia longa e a produção de metano sem causar efeitos deletérios sobre a população microbiana e digestibi

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16

Zuta, Charles Prince. "Synthesis of novel triglycerides from mackerel by-products and vegetable oils." Thesis, McGill University, 2003. http://digitool.Library.McGill.CA:80/R/?func=dbin-jump-full&object_id=84863.

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The study was designed to develop a nutraceutical product from by-products of fish processing. Fish oil was extracted from mackerel tissues (skin, viscera and muscle) using hexane-isopropanol (3:2 v/v) and chloroform-methanol (2:1 v/v) solvent systems. An oxidative study was carried out to determine the best processing and storage conditions to minimize autooxidation of mackerel oil. Urea complexation was used to concentrate polyunsaturated fatty acids (PUFA) from the extracted fish oil. The urea complexation process was optimized to determine the best reaction conditions for high yield

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17

Castagnino, Pablo de Souza. "In vitro fermentation parameters and biohydrogenation of vegetable oils without glycerol /." Jaboticabal, 2014. http://hdl.handle.net/11449/113760.

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Orientador: Telma Teresinha Berchielli<br>Coorientador: Juliana Duarte Messana<br>Banca: Izabelle Auxiliadora Molina de Almeida Teixeira<br>Banca: Paulo Henrique Moura Dian<br>Resumo: O glicerol combinado com óleos vegetais poderia limitar a intensa biohidrogenação dos ácidos graxos de cadeia longa e a produção de metano sem causar efeitos deletérios sobre a população microbiana e digestibilidade. Três incubações in vitro foram conduzidas para avaliar o efeito do glicerol (0 or 150 g/kg MS) combinado com três diferentes dietas: Feno de Tifton 85 sem a inclusão de óleo (FSO), Feno de Tifton 85

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18

Ginsburg, Shoshana Rivka. "Extraction of Lipid Soluble Antioxidants from Rosemary Leaves Using Vegetable Oils." The Ohio State University, 2019. http://rave.ohiolink.edu/etdc/view?acc_num=osu1563290049617458.

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19

Satyarthi, J. K. "Catalytic conversion of vegetable oils to biofuels over transition metal catalysts." Thesis(Ph.D.), CSIR-National Chemical Laboratory, Pune, 2011. http://dspace.ncl.res.in:8080/xmlui/handle/20.500.12252/3772.

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20

Meng, Yudong. "Structure and reactivity approach applied to the epoxidation of vegetable oils." Electronic Thesis or Diss., Normandie, 2025. http://www.theses.fr/2025NORMIR05.

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La prise de conscience croissante des enjeux environnementaux au cours des dernières décennies a mis en évidence le besoin urgent d'alternatives durables aux ressources fossiles, en raison du réchauffement climatique, des émissions de gaz à effet de serre (GES) et de l'épuisement des réserves fossiles. L'industrie chimique, dépendante des matières premières pétrolières, contribue de manière significative aux émissions de GES, exacerbant les défis environnementaux et soulevant des inquiétudes concernant la sécurité des ressources. La biomasse, ressource renouvelable et carboneutre, joue un rôle

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21

Gibert, Casamada Anna. "The utilization of filled milk in the manufacture of yogurt." Thesis, University of Lincoln, 1995. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.262208.

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22

Kalu, Clara U. U. "A chemical and organoleptic assessment of autoxidising oils." Thesis, Liverpool John Moores University, 1995. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.262066.

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23

Prokkola, H. (Hanna). "Biodegradation studies of recycled vegetable oils, surface-active agents, and condensing wastewaters." Doctoral thesis, Oulun yliopisto, 2015. http://urn.fi/urn:isbn:9789526209869.

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Abstract Biodegradation is an aerobic or anaerobic degradation reaction where bacteria use organic materials as an energy source. In the aerobic biodegradation reaction, bacteria need oxygen as an electron acceptor, whereas an anaerobic reaction takes place in the absence of oxygen. Compounds degrade totally or partially, and produce simple inorganic species, such as CO2, CH4, NH3, NO3−, and H2O, as well as by-products that may be non-biodegradable and/or toxic. In this thesis, the biodegradability of recycled vegetable oils, surface-active agents, and condensing waters from the process of woo

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24

O'Neill, Alfred John. "The extraction of vegetable oils from potato chips using supercritical carbon dioxide." Thesis, University of Ottawa (Canada), 1987. http://hdl.handle.net/10393/5194.

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25

Rodrigues, Ângela. "Chemical modification of vegetable oils to improve oxidative resistance and physical properties." Thesis, Manchester Metropolitan University, 2009. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.501958.

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This thesis investigates the acetylation of the unsaturated groups present in the hydrocarbon chain of rapeseed oil and esterification of the hydroxyl groups present in hydrogenated castor oil. The reaction of carboxylic acids, acetic anhydride and acid chlorides with the hydroxyl group of solid hydrogenated castor oil is explored to instigate a change in the physical properties. Such modifications often change the solid, lard-like material, into a liquid with potential for use as a dielectric fluid. The reaction of hydrogenated castor oil with acetic acid and sulphuric acid or PTSA as catalys

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26

Retief, Liezel. "Analysis of vegetable oils, seeds and beans by TGA and NMR spectroscopy." Thesis, Stellenbosch : University of Stellenbosch, 2011. http://hdl.handle.net/10019.1/6831.

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Thesis (PhD (Chemistry and Polymer Science))--University of Stellenbosch, 2011.<br>ENGLISH ABSTRACT: Due to the commercial, nutritional and health value of vegetable oils, seeds and beans, the analysis of their components is of much interest. In this dissertation oil-containing food products, specifically vegetable oils, seeds and beans, were investigated. Selected minor components of three locally produced vegetable oils, namely apricot kernel, avocado pear and macadamia nut oils were investigated using 31P NMR spectroscopy. These minor components, including 1,2 diacylglycerols, 1,3 diac

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27

Panchal, B. "Production of polyhydroxyalkanoates by Pseudomonas mendocina using vegetable oils and their characterisation." Thesis, University of Westminster, 2016. https://westminsterresearch.westminster.ac.uk/item/9x22w/production-of-polyhydroxyalkanoates-by-pseudomonas-mendocina-using-vegetable-oils-and-their-characterisation.

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Synthesis of Polyhydroxyalkanoates (PHAs) by Pseudomonas mendocina, using different vegetable oils such as, coconut oil, groundnut oil, corn oil and olive oil, as the sole carbon source was investigated for the first time. The PHA yield obtained was compared with that obtained during the production of PHAs using sodium octanoate as the sole carbon source. The fermentation profiles at shaken flask and bioreactor levels revealed that vegetable oils supported the growth of Pseudomonas mendocina and PHA accumulation in this organism. Moreover, when vegetable oil (coconut oil) was used as the sole

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28

Cash, Gregory Anthony. "Studies of the oxidation and stabilisation of vegetable oils and model compounds." Thesis, Queensland University of Technology, 1986. https://eprints.qut.edu.au/35985/1/35985_Cash_1986.pdf.

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This thesis describes the use of a novel chemiluminescence (CL) technique to deter·mine the extent of oxidation and stability in both model compounds and vegetable oils. As it is the presence of hydroperoxides in vegetable oils that leads to theirdeterioration, the hydroperoxides of methyl linoleate (MU were used as model compounds in a CL study of hydroperoxide decomposition in nitrogen, both in the bulk and on active substrates. The largest signals and the fastest decays occurred on neutral alumina. The results indicate induced decomposition via a bimolecular initiation of hydropero

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29

Ares, Gondra Zaloa. "Study of factors influcencing the quality and yield of biodiesel produced by transesterification of vegetable oils." Thesis, University of Gävle, Faculty of Engineering and Sustainable Development, 2009. http://urn.kb.se/resolve?urn=urn:nbn:se:hig:diva-6934.

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<p>Biofuels are a developing kind of fuel whose origin is biomass. Among them, many different kind of fuels can be found: bioethanol, biobutanol, biodiesel, vegetable oils, biomethanol, pyrolysis oils, biogas, and biohydrogen. This thesis work is focused on the production of biodiesel, which can be used in diesel engines as a substitute for mineral diesel. Biodiesel is obtained from different kinds of oils, both from vegetable and animal sources. However, vegetable oils are preferred because they tend to be liquid at room temperature.</p><p>The process to obtain biodiesel implies first a react

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30

Zhu, Lin. "Development of elastomers and elastomeric nanocomposites from plant oils." Access to citation, abstract and download form provided by ProQuest Information and Learning Company; downloadable PDF file, 275 p, 2006. http://proquest.umi.com/pqdweb?did=1068271741&sid=6&Fmt=2&clientId=8331&RQT=309&VName=PQD.

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31

Gersbach, Paul Vincent, University of Western Sydney, and of Science Technology and Environment College. "Aspects of essential oil secretion in vascular plants." THESIS_CSTE_XXX_Gersbach_P.xml, 2001. http://handle.uws.edu.au:8081/1959.7/775.

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A study of some aspects of essential oil secretion in plants was conducted. The first part of the study involved analysis of the volatile terpenoid content and composition of leaf extracts from a range of Australian native plants by gas chromatography and mass spectrometry. Secretory structures were studied by several microscopic imaging techniques including conventional bright and dark field optical microscopy, confocal microscopy, and scanning (SEM) and transmission (TEM) electron microscopy. Three methods were employed for scanning electron microscopy. Sample material was prepared for conve

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32

Cai, Xiaoshuang. "Production of carbonated vegetable oils from a kinetic modeling to a structure-reactivity approach Structure-reactivity : comparison between the carbonation of epoxidized vegetable oils and the corresponding epoxidized fatty acid methyl ester Aminolysis of cyclic-carbonate vegetable oils as a non-isocyanate route for the synthesis of polyurethane: a kinetic and thermal study Influence of ring‐opening reactions on the kinetics of cottonseed oil epoxidation Investigation of the physicochemical properties for vegetable oils and their epoxidized and carbonated derivatives Influence of gas-liquid mass transfer on kinetic modeling : carbonation of epoxidized vegetable oils." Thesis, Normandie, 2019. http://www.theses.fr/2019NORMIR05.

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La valorisation de la biomasse et du dioxyde de carbone est à présent considérée comme une solution aux problèmes environnementaux du réchauffement climatique et l'épuisement des réserves de pétrole. Ainsi, les huiles végétales ont attiré l'attention croissante des milieux universitaires et industriels, comme une source de biomasse potentielle renouvelable qui peut être appliquée à la production de substitut fossile pour un développement durable, due à leurs caractères renouvelables, durables, biodégradables. De plus, cette biomasse est disponible avec une énorme quantité. Durant des décennies

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Valverde, Sarmiento Carmen. "10-Undecenoic acid-based biodegradable hydroxy polyesters: a platform for aminoacid bioconjugates and PEG-derived amphiphilic copolymers." Doctoral thesis, Universitat Rovira i Virgili, 2018. http://hdl.handle.net/10803/664715.

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El gran desenvolupament que actualment estan experimentant els biopolímers es deu fonamentalment als alts preus i a la disminució de les reserves de petroli, juntament amb la preocupació que existeix avui en dia en matèria de sostenibilitat ambiental. Entre els polímers d'origen renovable, els polièsters alifàtics són dels més estudiats ja que es consideren molt adequats per aplicacions com a biomaterials a causa de la seva biocompatibilitat i biodegradabilitat. En aquesta tesi s'han preparat polièsters renovables mitjançant química sostenible i utilitzant derivats de l'oli de ricí, com a p

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34

Kim, Kyunghoon [Verfasser]. "Epoxidation of vegetable oils using the heterogeneous catalysis, amorphous Ti-SiO2 / Kyunghoon Kim." Aachen : Hochschulbibliothek der Rheinisch-Westfälischen Technischen Hochschule Aachen, 2012. http://d-nb.info/1023931931/34.

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Bahari, Adli. "Investigation into tribological performance of vegetable oils as biolubricants at severe contact conditions." Thesis, University of Sheffield, 2017. http://etheses.whiterose.ac.uk/19524/.

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The concern about the pollution created by the use of mineral oil based lubricants and the depletion stock of petroleum has inspired research on alternative lubricants known as biolubricants. The tribological performance of vegetable oils (palm oil and soybean oil) as biolubricants and their blends with mineral oil and anti-wear additives was evaluated in order to assess their potential use in automotive engines. The tests were performed using a reciprocating ball-on-flat test-rig at severe contact conditions with grey cast iron specimens. The performance was compared with a commercial mineral

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36

BARTOLUCCI, EDOARDO. "Influence of genetic and technological factors on the quality parameters of vegetable oils." Doctoral thesis, Università Politecnica delle Marche, 2022. https://hdl.handle.net/11566/299824.

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Il progetto di dottorato consiste nella determinazione dei fattori genetici (cultivar), tecnologici (tecniche di estrazione) e di raffinazione che influenzano la qualità dell’olio di oliva e di altri oli vegetali. Nella prima parte di questo progetto saranno messi a confronto 11 oli extravergini di oliva monovarietali, evidenziando le differenze in termini di composizione chimico-fisica, sensoriali e verificando come la cultivar possa influenzare per il 50%, assieme ad altri fattori, la composizione chimica e sensoriale nonché il contenuto di sostanze bioattive. La seconda parte con

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37

Galli, F. "REDUCTION OF THE CARBON FOOTPRINT OF FUELS AND PETROCHEMICALS STARTING FROM VEGETABLE OILS." Doctoral thesis, Università degli Studi di Milano, 2015. http://hdl.handle.net/2434/332036.

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In this work developments and innovative studies are proposed for the current biodiesel technology in order to make the whole productive process more efficient. In particular, three main aspects were deeply investigated, the oil deacidification, as a pre-step to the oil transesterification, working on the optimization of the operative parameters and developing a suitable kinetic model able to predict, in a wide range of concentrations and temperatures, the acid conversion and the eventual double phase system formation. Moreover, the extraction of carotenes from crude palm oil was investigated,

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38

Xiao, Haiyi. "LOW TRANS FATTY ACID CONTAINING HYDROGENATED EDIBLE OILS." Miami University / OhioLINK, 2007. http://rave.ohiolink.edu/etdc/view?acc_num=miami1196130854.

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39

Binti, Shaarani Farra Wahida. "Synthesis and characterization of polycarbonates from epoxidized vegetable oils, propylene oxide and carbon dioxide." Doctoral thesis, Universitat Politècnica de Catalunya, 2021. http://hdl.handle.net/10803/672164.

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The current research is primarily focused on the preparation of a polycarbonate using epoxidized linseed oil (ELO) and epoxidized soybean oil (ESO) as feedstocks. The presence of unsaturation in vegetable oil structure enables chemical modifications to introduce epoxy group which further used to synthesize polycarbonate via catalytic copolymerization with carbon dioxide (CO2). In this study, with the presence of heterogeneous catalyst a mixture of epoxidized vegetable oil and propylene oxide (PO) were reacted with CO2. Synthesis of polycarbonate via this pathway helps to lessen the reliance on

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40

Alattar, Hasan. "Effect of heat treatment on α-Tocopherol content and antioxidant activity of vegetable oils". Thesis, McGill University, 2013. http://digitool.Library.McGill.CA:80/R/?func=dbin-jump-full&object_id=119680.

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The objective of this research was to investigate the effect of heating on α-Tocopherol content and antioxidant activity of different vegetable oils (EVOO, canola and palm oil). The highest α-Tocopherol content was found in EVOO followed by canola oil and palm oil (323 ±5, 271 ±2 and 174 ±2 µg/ml) respectively. The effect of heat was done at 70, 100 and 130 oC, for time intervals of 0.5, 1, 1.5 and 2 h. Thermal degradation of α-Tocopherol in the oils was minimal at 70 oC and increased at 100 oC and 130 oC. Heating at 130 oC for 2 h resulted in 100, 24 and 44 % degradation of α-Tocopherol in

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41

Marais, Christiaan De Wet. "The determination of cis and trans fatty acid isomers in partially hodrogenated plant oils /." Link to online version, 2007. http://hdl.handle.net/10019/399.

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Dos, Santos Pereira Maria da Gloria. "Bacterial degradation of linseed and sunflower oils in salt marsh sediments." Thesis, Bangor University, 1999. https://research.bangor.ac.uk/portal/en/theses/bacterial-degradation-of-linseed-and-sunflower-oils-in-salt-marsh-sediments(4697b1cb-815d-46a6-8b52-880c0cfcf62c).html.

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This work investigated the consequences of vegetable oils spills in salt marsh sediments. The role of autochthonous bacteria in the oils degradation and degradative pathways were also studied 'in situ' and 'in vitro'. Simulated spills of sunflower and linseed oils revealed that both oils penetrated the sediments at a rate of 10-7 CM2 s-1. However, whereas 60% of the linseed oil had disappeared from the sediments after 2 months most of the sunflower oil remained after 6 months. Differences were noted in the adsorption of the oils to sediment particles and the depth at which they accumulate and

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Pan, Xiao. "Novel Biobased Resins using Sucrose Esters of Plant Oils." Diss., North Dakota State University, 2011. https://hdl.handle.net/10365/29636.

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Interest in using renewable raw materials to prepare biobased monomers, polymers, and materials is rapidly increasing. The goal of the research described is to develop branched polyesters of plant oil fatty acids, using different core pol yo ls (i.e. sucrose, dipentaerythritol, and tripentaerythritol) and plant oils (i.e. linseed, safflower, and soybean), into curing systems that have potential uses in applications such as coatings, composites, and adhesives. This study is mainly focused on the use of sucrose as the core polyol in the soyate resins. Sucrose esters and their derivatives have a

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Guo, Yan. "Alkaline-catalyzed production of biodiesel fuel from virgin canola oil and recycled waste oils." Click to view the E-thesis via HKUTO, 2005. http://sunzi.lib.hku.hk/hkuto/record/B36584927.

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Normand, Laura. "The effect of minor components on the frying stability of regular and modified vegetable oils." Thesis, National Library of Canada = Bibliothèque nationale du Canada, 1998. http://www.collectionscanada.ca/obj/s4/f2/dsk2/ftp01/MQ32202.pdf.

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Kupranycz, Donna B. (Donna Bohdanka). "Effects of thermal oxidation on the constitution of butterfat, butterfat fractions and certain vegetable oils." Thesis, McGill University, 1986. http://digitool.Library.McGill.CA:80/R/?func=dbin-jump-full&object_id=72822.

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Maisonneuve, Lise. "Vegetable oils as a platform for the design of sustainable and non-isocyanate thermoplastic polyurethanes." Thesis, Bordeaux 1, 2013. http://www.theses.fr/2013BOR15218/document.

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Cette thèse porte sur la synthèse de polyuréthanes thermoplastiques plus durables à partir de dérivés des huiles végétales. La première voie étudiée est basée sur la réaction, largement utilisée, entre un diol et un diisocyanate. Aussi, pour s’affranchir de l’utilisation des diisocyanates toxiques, une approche via la polyaddition entre un bis carbonate cyclique et une diamine a également été étudiée. Pour ce faire des précurseurs bi-fonctionnels : diols, bis carbonates cycliques à 5 et 6 chainons et diamines ont été préparés à partir de dérivés de l’huile de tournesol (oléate de méthyle) et d

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Peacock, Lesley. "Isomeric fatty acids and platelet function." Thesis, University of Aberdeen, 1990. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.253708.

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1. <i>Cis</i> unsaturated fatty acids were shown to inhibit porcine platelet aggregation in response to both collagen and thrombin. Fatty acids with a <i>trans</i> double bond had an anti-aggregatory effect on collagen-induced aggregation but this was significantly less than that observed with the <i>cis</i> equivalent and was diminished as the dose of agonist increased. Thrombin-induced platelet aggregation was unchanged or slightly potentiated by <i>trans</i> isomers. 2. Both the <i>cis</i> and <i>trans</i> isomeric acids inhibited collagen-induced TXB<sub>2</sub> production. The <i>trans</i

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Ruiz, Villán Lorena. "Valorización del aceite de ricino en química de polímeros: Síntesis de poliésteres y poliuretanos a partir de heptanal." Doctoral thesis, Universitat Rovira i Virgili, 2017. http://hdl.handle.net/10803/461094.

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En la actualitat, els poliuretans i els polièsters són dos dels materials polimèrics més importants ia que se poden utilitzar en multitud de camps donada la seva versatilitat. Els últims avenços en la investigació sobre aquest tipus de polímers venen donats per la creixent demanda de processos més sostenibles i l'ús de matèries primeras d'origen renovable. Algunes d'aquestes són els olis vegetals, com l'oli de ricí el qual no és apte per el consum humà. A partir d'aquest oli, s'obté l'àcid ricinoleic amb un rendiment elevat. Aquest àcid es converteix mitjançant piròlisi en àcid undecenoic i he

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Heaton, Thomas. "Characterisation of waste vegetable oils used as binders for masonry units made entirely of waste materials." Thesis, University of Leeds, 2011. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.551270.

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Vegeblocks are masonry units made from 100% waste materials. They use waste vegetable oil as a binder, and the manufacture process involves heat curing of a block made from a mixture of the binder and waste aggregates. Research into long-term properties and enhancement of the manufacture process of these units requires an understanding of the chemistry that occurs during this process. Analysis of the binder by a mixture of spectroscopy and chromatography indicates that the reactions are characterised by consumption of unsaturated hydrocarbons in the seed oils to form products of hydrolysis, cr

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