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Dissertations / Theses on the topic 'Biodegradable oils'

Author: Grafiati

Published: 28 June 2021

Last updated: 29 July 2025

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1

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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2

Valencia, Sullca Cristina Encarnación. "Different strategies to obtain antimicrobial biodegradable films for food applications, using starch and/or chitosan with or without essential oils." Doctoral thesis, Universitat Politècnica de València, 2017. http://hdl.handle.net/10251/89094.

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El desarrollo de materiales de envase biodegradables activos es uno de los retos de la sociedad para resolver los problemas medioambientales asociados a los residuos plásticos y mejorar la conservación de los alimentos, alargando su vida útil. En la presente Tesis Doctoral, se han analizado diferentes estrategias para la obtención y caracterización de películas biodegradables a base de hidrocoloides (almidón de yuca (A) y quitosano (Q)) con características antimicrobianas. Se obtuvieron películas bioactivas gracias a la incorporación de aceites esenciales de capacidad antimicrobiana comprobada

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3

Queiroz, Sonia Regina da Silva. "Estudo do metabolismo de ácidos graxos em Pseudomonas putida visando a modulação da composição monomérica de elastômero biodegradável." Universidade de São Paulo, 2008. http://www.teses.usp.br/teses/disponiveis/87/87131/tde-09032009-162432/.

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Neste trabalho, foram desenvolvidas estratégias para modular a composição de elastômeros biodegradáveis da família dos polihidroxialcanoatos (PHA), produzidos por Pseudomonas, a partir de ácidos graxos ou óleos vegetais, para diversificar suas aplicações, sobretudo pela inserção de monômeros insaturados. A composição do PHA produzido variou com o tipo de ácido graxo fornecido e com sua proporção em misturas. Em genomas seqüenciados, detectaram-se dois genes fadH (codificador de 2,4-dienoilCoA hidratase) em P. aeruginosa e apenas um em outras Pseudomonas. Observou-se uma correlação entre o núme

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4

Figueroa, López Kelly Johana. "Biodegradable Mono and Multilayer Materials with Antimicrobial Capacity Based on Circular Bioeconomy of Application Interest in Food Packaging." Doctoral thesis, Universitat Politècnica de València, 2021. http://hdl.handle.net/10251/168439.

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[ES] El envasado activo es una de las tecnologías emergentes más relevantes de la industria alimentaria. Su objetivo es interactuar con el espacio de cabeza del envase para controlar las reacciones enzimáticas, químicas, físicas y microbiológicas que deterioran los alimentos por medio de la absorción o liberación. La actual tesis doctoral trata originalmente del desarrollo y la caracterización de estructuras de envasado de alimentos activas y biodegradables mono y multicapa basadas en materiales de polihidroxialcanoatos (PHA) electroestirados derivados de estrategias de bioeconomía circular. C

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5

Verlinden, Rob A. J. "Biodegradable polyhdroxyalkanoates from waste frying oil." Thesis, University of Wolverhampton, 2009. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.542319.

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6

Jackson, Frank. "Biodegradable hydraulic fluids : reducing oil-related pollution in the construction industry." Thesis, Nottingham Trent University, 2006. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.429424.

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7

Spohner, Milan. "Dielektrické vlastnosti rostlinných olejů pro elektrotechniku." Doctoral thesis, Vysoké učení technické v Brně. Fakulta elektrotechniky a komunikačních technologií, 2021. http://www.nusl.cz/ntk/nusl-444639.

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The dissertation thesis deals with the analysis of prospective environmentally compatible electrical insulating fluids for electrical engineering in relation to their chemical structure. The thesis starts with the overview of the current state of the art and of the latest trends in the use of synthetic and biodegradable natural oils. In the experimental part were studied these oils: mineral oils, rapeseed oil, sunflower oils, soybean oil, methyl oleate, peanut oil, MCT oil, castor oil and other. Dielectric properties were measured using LRC meter Agilent 4980A including dielectric liquid test

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8

Tarrant, Ryan Carl Allen. "Influence of a Biodegradable Litter Amendment on the Pyrolysis of Poultry Litter." Thesis, Virginia Tech, 2010. http://hdl.handle.net/10919/35126.

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The effects of adding a biodegradable litter amendment (AmmoSoak), developed from steam exploded corncobs, to poultry litter prior to pyrolysis on the product yields and qualities were investigated. Mixtures of litter and AmmoSoak were pyrolyzed in a bench-scale fluidized bed reactor. The objective of the second phase was to start-up a pilot-scale fluidized bed reactor unit. The poultry litter had a lower higher heating value (HHV), higher moisture, ash, nitrogen, sulfur, and chlorine contents than AmmoSoak. Analysis of the poultry litter indicated a mixture of volatiles, hemicelluloses, cell

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9

Sitorus, Henry Binsar Hamonangan. "The study of jatropha curcas oil-based biodegradable insulation materials for power transformer." Thesis, Ecully, Ecole centrale de Lyon, 2015. http://www.theses.fr/2015ECDL0022/document.

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Ce travail porte sur la caractérisation physico-chimique de l'huile de Jatropha Curcas et sa capacité à remplacer l'huile minérale dans les transformateurs de puissance. Ce produit présente plusieurs avantages sur les autres huiles végétales comme l'huile de palme ou l'huile de colza, qui recommandent sa production et son utilisation. En effet, la plante de Jatropha Curcas peut être cultivée sur des sols pauvres à faibles précipitations, évitant ainsi d'utiliser des sols plus fertiles pour sa culture permettant ainsi aux petits exploitants de réserver leurs terres aux cultures de base. Cette p

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10

Cano, Embuena Amalia Isabel. "Different strategies to improve the functionality of biodegradable films based on starch and other polymers." Doctoral thesis, Universitat Politècnica de València, 2016. http://hdl.handle.net/10251/55383.

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[EN] In the present Doctoral Thesis, different strategies to improve functional properties of starch films for food packaging applications were analysed: study of the effect of amylose:amylopectin ratio, blend with other polymers poly(vinyl alcohol) (PVA), and incorporation of different fillers (rice bran and cellulose nanocrystals-CNCs) and antimicrobial agents (neem oil-N, oregano essential oil-O and silver nanoparticles-AgNPs). Likewise, a biodegradation study of the films as affected by antimicrobials was carried out. Among different starches with distinct amylose:amylopectin ratio, pea s

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11

Kinyua, Maureen Njoki. "Effect of Solids Retention Time on the Denitrification Potential of Anaerobically Digested Swine Waste." Scholar Commons, 2013. http://scholarcommons.usf.edu/etd/4520.

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Three continuously stirred tank reactors (CSTR) were operated in semi continuous mode treating swine waste using anaerobic digestion. The reactors were used to test the effect of solid retention time (SRT) on CH4 yield, total ammonia nitrogen (TAN) concentrations, % volatile solids (VS), chemical oxygen demand (COD) and volatile fatty acids (VFA) removal, readily biodegradable COD concentration and the denitrification potential for the effluent in a biological nutrient removal (BNR) system. During Phase I of the study, the three reactors were operated at the same 28 day SRT for 16 weeks. SRTs

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12

Stoll, Liana. "Desenvolvimento e aplicação de filmes biodegradáveis com antioxidantes extraídos a partir de bagaço de uva, um resíduo da indústria vitivinícola." reponame:Biblioteca Digital de Teses e Dissertações da UFRGS, 2015. http://hdl.handle.net/10183/129770.

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O consumo abusivo de embalagens plásticas tem causado diversos problemas ambientais, visto que as mesmas são produzidas a partir de fontes não renováveis de energia e são resistentes à degradação. Neste contexto, o desenvolvimento de filmes biodegradáveis ativos para aplicação em alimentos é de grande importância pois, além de serem produzidos a partir fontes renováveis e mais sustentáveis, os mesmos podem interagir com o produto embalado e proporcionar benefícios extras em relação aos filmes convencionais. Este trabalho utilizou o bagaço de uva proveniente do processo de vinificação como font

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13

Chai, Luxiao. "Rapid access to functional oil-filled nanocapsules through nanoprecipitation." Thesis, Lyon, 2019. http://www.theses.fr/2019LYSEI047.

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Ce projet de thèse avait pour objectif l’élaboration de glyconanocapsules à cœur huileux par nanoprécipitation à partir de polymères biocompatibles et biodégradables. Dans ce but, nous avons tout d’abord élaboré une série de glycopolymères à base de poly(alcool vinylique) (PVA) par copolymérisation radicalaire de type RAFT suivie d’une réaction d’alcoolyse sélective. En parallèle, nous avons synthétisé une seconde famille de glycopolymères en hydrolysant partiellement des chaînes de poly(2-ethyl-2-oxazoline) (PEOX) et d’autre part, en réalisant une réaction d’animation réductrice entre les ami

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14

Basiak, Ewelina. "Study of the chemical, physical and functional properties of edible starch-based films." Thesis, Dijon, 2016. http://www.theses.fr/2016DIJOS018/document.

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La quantité de déchets augmente depuis plusieurs décénies, issus principalement de l'industrie du plastique. La production cumulée de matières plastiques au cours des dix dernières années est supérieure que pendant le dernier millénaire. Une des solutions pour réduire les impacts écologiques et économiques est de dévelopement de films et enrobages biodégradables et/ou comestibles.L'objectif de cette thèse est d'étudier des films et enrobages comestibles à base d'amidon. Quinze types de solutions filmogènes ont été formulés: 3 types d’amidons, amidon + protéines, amidon + huile de colza, amidon

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15

Crizel, Tainara de Moraes. "Aproveitamento de resíduos da indústria alimentícia e nutracêutica no desenvolvimento de ingredientes ativos para aplicação em filmes biodegradáveis." reponame:Biblioteca Digital de Teses e Dissertações da UFRGS, 2017. http://hdl.handle.net/10183/163803.

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Diariamente são descartados no mundo toneladas de resíduos do processamento de frutas que poderiam ser aproveitados pelo seu elevado poder nutricional e funcional, que acabam sendo desperdiçados e podem gerar sérios problemas ao meio ambiente. Outro descarte inadequado que agrava esse problema ambiental é o de embalagens plásticas, que quando não submetidas ao processo de reciclagem trazem enormes danos. Por esses fatores, esse estudo teve como objetivo o aproveitamento de subprodutos da indústria de alimentos para o desenvolvimento de farinhas funcionais e aproveitamento dos resíduos da indús

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16

Spohner, Milan. "Diagnostika perspektivních elektroizolačních kapalin." Master's thesis, Vysoké učení technické v Brně. Fakulta elektrotechniky a komunikačních technologií, 2011. http://www.nusl.cz/ntk/nusl-219216.

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This work deals with the classification and diagnosis of electrical insulating liquids. Furthermore, the theoretical part describes the mathematical and physical principles of these liquids. The automated workplace was compiled with development environment VEE Pro for measurement of viskosity and control thermostat medingen and modifiable components for measuring complex permittivity in the frequency range. In the experimental part was carried out measurements of selected material parameters, investigated the effect of difficult conditions and made the mathematical evaluation of physical pheno

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17

Ruellan, Alexandre. "Conception raisonnée à l’aide de la formulation et du procédé d’un film souple biosourcé et biodégradable pour l’emballage alimentaire." Electronic Thesis or Diss., Paris, AgroParisTech, 2015. http://www.theses.fr/2015AGPT0032.

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L'utilisation de ressources renouvelables et la production de matériaux biodégradables sont des solutions adaptées afin de diminuer l'impact environnemental du secteur des plastiques. Il existe donc une demande du marché pour des produits écoresponsables, à condition que ces derniers soient techniquement et économiquement compétitifs par rapport aux matériaux classiquement utilisés. Dans le domaine de l'emballage alimentaire, une technique très employée permettant la réalisation de matériaux performants est la création de structures multicouches combinant avantageusement les propriétés de diff

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18

Martins, Ramiro Carneiro. "New materials, surface coatings and biodegradable oils for industrial gears." Doctoral thesis, 2008. http://hdl.handle.net/10216/10956.

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19

Martins, Ramiro Carneiro. "New materials, surface coatings and biodegradable oils for industrial gears." Tese, 2008. http://hdl.handle.net/10216/10956.

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20

Cardoso, Nuno Filipe Ribeiro. "Mechanical performance of biodegradable, low toxicity ester based industrial gear oils." Master's thesis, 2007. http://hdl.handle.net/10216/12356.

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21

Cardoso, Nuno Filipe Ribeiro. "Mechanical performance of biodegradable, low toxicity ester based industrial gear oils." Dissertação, 2007. http://hdl.handle.net/10216/12356.

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22

Natarajan, Janeni. "Biodegradable Polymers for Drug Delivery and Tissue Engineering." Thesis, 2017. http://etd.iisc.ac.in/handle/2005/3776.

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Regeneration, a spontaneous response of bones in response to injuries, infections and fractures, is severely compromised in certain clinical circumstances. Unfortunately, several shortcomings are associated with the current treatment of bone grafting method such as donor shortage and immune response for allografts and donor morbidity for autografts. Thus, the development of clinical alternates is essential. One promising adjunct method is bone tissue engineering that includes the implantation of a scaffold containing the cells with the supplementation of suitable growth factors. Among the vari

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23

Vecchione, Raffaele. "Biodegradable Nanocapsules produced via Layer-by-Layer Technique on Oil based Templates." Tesi di dottorato, 2013. http://www.fedoa.unina.it/9402/7/Raffaele_Vecchione_25.pdf.

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In this work we focused the attention on the development of nanocapsules like carriers for their capability to embed high payloads of active substances. Moreover we just used natural materials like vegetal oils and natural polysaccharides to avoid side effects from the use of such nanocarriers. In particular, we chose to start from an oil core template for the preparation of nanocarriers to be used in bio-nano-technology fields. Indeed, oil in water emulsions can easily reach sizes down to 100nm making these systems very interesting from a nanotechnology point of view. Then, there is strong ne

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24

Natarajan, Janeni. "Biodegradable Polymers for Drug Delivery and Tissue Engineering." Thesis, 2017. http://etd.iisc.ernet.in/2005/3776.

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Regeneration, a spontaneous response of bones in response to injuries, infections and fractures, is severely compromised in certain clinical circumstances. Unfortunately, several shortcomings are associated with the current treatment of bone grafting method such as donor shortage and immune response for allografts and donor morbidity for autografts. Thus, the development of clinical alternates is essential. One promising adjunct method is bone tissue engineering that includes the implantation of a scaffold containing the cells with the supplementation of suitable growth factors. Among the vari

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25

Fan, Yi-Ting, and 范宜婷. "Physical and Antimicrobial Properties of Biodegradable Film Containing Chitosan and Oregano Essential Oil." Thesis, 2015. http://ndltd.ncl.edu.tw/handle/19858925814918845666.

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碩士<br>輔仁大學<br>食品科學系碩士班<br>103<br>Oregano essential oil (OEO) is widely used as a food flavoring, and also shows antimicrobial and antioxidative capacities. Additionally, Chitosan (CH) has been demonstrated as an active polymer with antimicrobial activity, which is beneficial to food quality and safety. The objectives of this research aimed to prepare an active packaging material using biodegradable polylactide film incorporating with antimicrobial substances (chitosan and/or oregano), and evaluate its mechanical properties and antimicrobial potential. Solvent casting technique was accomplished

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