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Dissertations / Theses on the topic 'Biodegradatie'

Author: Grafiati

Published: 4 June 2021

Last updated: 30 January 2023

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1

Herwijnen, René van. "Metabolic and cometabolic biodegradation of PAHs." [S.l. : Amsterdam : s.n.] ; Universiteit van Amsterdam [Host], 2003. http://dare.uva.nl/document/87041.

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2

Jesus, Gisele Jane de. "Aplicação de Neurospora crassa para avaliação da biosorção e biodegradação de corantes ácido, xanteno, diretos e reativo /." Rio Claro : [s.n.], 2005. http://hdl.handle.net/11449/103945.

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Orientador: Carlos Renato Corso<br>Banca: Sandra Mara Martins Franchetti<br>Banca: José Carlos Marconato<br>Banca: Aurora Mariana Garcia de França Souza.<br>Banca: Antonio Sérgio Spanó Seixas<br>Resumo: Este trabalho utilizou Neurospora crassa 74A em sua forma paramorfogênica, para avaliar o processo inicial da remoção da cor de efluentes aquáticos, que se desenvolveu em duas etapas; a biosorção e a biodegradação. Nos espectros de UV-Vis foi possível estabelecer o grau de remoção do corante por biosorção, seguido, após um tempo mais longo de contato, do início de processo biodegradativo; em qu

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3

Boháčová, Zdeňka. "Polykaprolakton, jeho syntéza, charakterizace a degradabilita." Master's thesis, Vysoké učení technické v Brně. Fakulta chemická, 2010. http://www.nusl.cz/ntk/nusl-216644.

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Presented diploma thesis deals with the study of ring-opening polymerization (ROP) of caprolactone catalyzed by novel organic and organometallic compounds. In the theoretical part of the thesis a summary of polymerization strategies and catalytic/initiators systems for ROP of polyesters is overviewed on the basis of reported background research. In experimental part a series of caprolactone polymerization runs with the view of polymerization conditions (solution/monomer ratio, catalyst/initiator ratio, monomer/initiator ratio and monomer concentration) at the temperature range of 25-70 °C was

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4

Šuráňová, Zuzana. "Využití PHA produkujících kmenů v bioremediačních technologiích." Master's thesis, Vysoké učení technické v Brně. Fakulta chemická, 2017. http://www.nusl.cz/ntk/nusl-316181.

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The aim of this work is study of utilization of PHA producing bacteria in bioremediation technologies. For this study were used bacteria Pseudomonas putida KT2440 and two isolates from soil contaminated by petroleum - Pseudomonas gessardii (D2) a Pseudomonas fulva (D3). The experimental part describes especially study of feather biodegradation using selected microbial strains. All the tested bacterial strains were capable of feather degradation and utilization as the sole carbon source. During biodegradation experiment, we monitored weight loss of feather, protease and keratinase activity, con

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5

Damborský, Pavel. "Studium mikrobiální degradace materiálů na bázi polykaprolaktonu." Master's thesis, Vysoké učení technické v Brně. Fakulta chemická, 2013. http://www.nusl.cz/ntk/nusl-216923.

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Diplomová práce se zabývá vlivem nutričních a aeračních faktorů na produkci lipáz bakterií Bacillus subtilis (CCM 1999). Produkce lipáz byla studována zejména z hlediska katalytického působení lipáz při degradaci polyesterových řetězců. Mezi studované parametry patřily: růst bakterií, lipolytická aktivita, pH optimum, teplotní optimum, tepelná stabilita, proteolytická aktivita, množství bílkovin, atd. a to v různých typech živných medií zaočkovaných Bacillus subtilis. Jedna série vzorků kultivačních médií pro BS na bázi: pepton a kvasničný extrakt (NB), pepton, kvasničný extrakt s 2% přídavkem

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6

Varmužová, Tamara. "Biodegradace s využitím termofilních mikroorganismů." Master's thesis, Vysoké učení technické v Brně. Fakulta chemická, 2009. http://www.nusl.cz/ntk/nusl-216455.

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This thesis is focused on study of biodegradability of modified polyurethane elastomeric films in synthetic medium with minerals and vitamins on tempered shaker by mixed thermophilic aerobic bacterial culture Bacillus and Thermus genera. In most cases addition of all used fillers (carboxymethyl cellulose, hydroxyethyl cellulose, acetylated cellulose, acetylated starch and glutein) led to increased biodegradability of elastomeric films with modifying agent in comparison with elastomeric films without modifying agent (referential). The growth of cultures was strongly increased in presence of ela

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7

Cheng, Jingguang. "Microplastics in the marine environment : an ecotoxicological perspective." Electronic Thesis or Diss., Sorbonne université, 2020. https://accesdistant.sorbonne-universite.fr/login?url=https://theses-intra.sorbonne-universite.fr/2020SORUS025.pdf.

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La pollution plastique océanique est l’une préoccupation majeure de notre siècle, avec plusieurs millions de tonnes de plastique déversées dans l'océan chaque année qui menacent la santé des écosystèmes. Les effets des plastiques ont été identifiés à tous les niveaux de la chaîne trophique, du zooplancton à la mégafaune, mais leurs effets sur la vie des microorganismes et sur leur rôle crucial dans le fonctionnement de l'écosystème océanique restent méconnus. L'objectif de cette thèse était d'étudier l'écotoxicité des plastiques en milieu marin. La première question traitée était : dans quelle

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8

Castellet, Rovira Francesc. "Fungal biodegradation of pharmaceutical active compounds in wastewater." Doctoral thesis, Universitat Autònoma de Barcelona, 2017. http://hdl.handle.net/10803/459245.

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Els fàrmacs constitueixen un grup gran, important i divers, de compostos químics dissenyats per a causar efectes terapèutics sobre la salut principalment humana, però també animal. Per la seva composició, són bioactius i difícils de degradar encara que presentin una dosi mínima. La seva varietat estructural, de composició i efectes és enorme i mentre que alguns d'ells són eliminats completament a les depuradores, d'altres romanen inalterats o parcialment transformats. A més a més, malgrat ser estrictament regulats per assajos clínics abans de la seva distribució al mercat, no existeixen

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9

Krahulová, Veronika. "Optimalizace přípravy biodegradovatelných obalů na bázi škrobu a jejich charakterizace pro adaptaci na výrobní technologie." Master's thesis, Vysoké učení technické v Brně. Fakulta chemická, 2020. http://www.nusl.cz/ntk/nusl-414126.

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This diploma thesis focuses on the problematics of preparation of biodegradable starch based packaging. The aim of the thesis is to optimize the preparation and verify the characteristics for further adaptation and production technologies. The films consisted of starch, PVA and glycerol. Four types of starches, three types of PVA and different ratios of glycerol were tested. Films were prepared by casting with glycerol as a plasticizer, instead of distilled water, to reduce the energy cost of the preparation. The mechanical properties of the films were tested as well. The experimentally determ

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10

Jesus, Gisele Jane de [UNESP]. "Aplicação de Neurospora crassa para avaliação da biosorção e biodegradação de corantes ácido, xanteno, diretos e reativo." Universidade Estadual Paulista (UNESP), 2005. http://hdl.handle.net/11449/103945.

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Made available in DSpace on 2014-06-11T19:32:54Z (GMT). No. of bitstreams: 0 Previous issue date: 2005-10-11Bitstream added on 2014-06-13T19:03:39Z : No. of bitstreams: 1 jesus_gj_dr_rcla.pdf: 4895578 bytes, checksum: 6970fd46e2b766b5810c294018cd18da (MD5)<br>Coordenação de Aperfeiçoamento de Pessoal de Nível Superior (CAPES)<br>Este trabalho utilizou Neurospora crassa 74A em sua forma paramorfogênica, para avaliar o processo inicial da remoção da cor de efluentes aquáticos, que se desenvolveu em duas etapas; a biosorção e a biodegradação. Nos espectros de UV-Vis foi possível estabelecer o g

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11

DERRADJI, DALILA-HABIBA. "Contribution a la mise au point d'un materiau d'emballage biodegradable : estimation de la biodegradation aerobie de melanges a base d'amidon natif et acetyle." Reims, 1996. http://www.theses.fr/1996REIMS011.

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L'evaluation du pourcentage de biodegradation de materiaux insolubles comme l'amidon natif ou acetyle necessite de connaitre le mieux possible le materiau a degrader avant d'envisager son utilisation comme constituant d'emballage biodegradable. La composition chimique doit etre parfaitement connue a la fois pour pouvoir calculer le pourcentage de conversion absolue en co#2 et en biomasse mais aussi pour selectionner l'agent biologique susceptible de depolymeriser le materiau puis de l'assimiler en tant que source de carbone. L'etude de la structure du materiau (analyse aux rayons x) obtenue ap

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12

Piechová, Jana. "Biodegradace organických látek aplikací termofilní kultury." Master's thesis, Vysoké učení technické v Brně. Fakulta chemická, 2008. http://www.nusl.cz/ntk/nusl-216214.

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The aim of this work is focused on biodegradability study of modified polyurethane materials (foams and foils) in glukose medium and biodegradation of whey. The biodegradability was tested with using mixed thermophilic aerobic bacterial culture of the Bacillus and Thermus genera. The cultivations were practised in the fermentor and in Erlenmayer flasks in a heated shaker. Maximal reduction of COD and culture growth has been achieved by biodegradation of polyuretane in the fermentor. Main effect of degradation was abiotic destruction of PUR materials and consequent utilization of degradation pr

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13

Benneouala, Mourad. "Biodegradation of slowly biodegradable organic matter in wastewater treatment plant (WWTP) : In depth analysis of physical and biological factors affecting hydrolysis of large particles." Thesis, Toulouse, INSA, 2017. http://www.theses.fr/2017ISAT0003/document.

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Dans cette thèse, la biodégradation et le devenir des matières organiques lentement biodégradables contenues dans les eaux usées ont été étudiés. La thèse s’est particulièrement penchée sur l’étude du processus d’hydrolyse dans la mesure où plusieurs auteurs considèrent qu’il s’agit du processus limitant durant la dégradation des matières considérées. L’analyse des résultats de la littérature en complétés de ceux que nous avons obtenu en laboratoire a permis d’identifier et ainsi souligner les manques par rapport aux mécanismes qui régissent la dégradation des matières organiques lentement bio

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14

Pickens, Mark Everett. "Design and Validation of an Automated Multiunit Composting System." Thesis, University of North Texas, 2009. https://digital.library.unt.edu/ark:/67531/metadc12184/.

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This thesis covers the design of an automated multiunit composting system (AMUCS) that was constructed to meet the experimental apparatus requirements of the ASTM D5338 standard. The design of the AMUCS is discussed in full detail and validated with two experiments. The first experiment was used to validate the operation of the AMUCS with a 15 day experiment. During this experiment visual observations were made to visually observe degradation. Thermal properties and stability tests were performed to quantify the effects of degradation on the polymer samples, and the carbon metabolized from the

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15

Santonja, Blasco Laura. "Contribution to the study of thermal, biological and photo degradation of polylactide." Doctoral thesis, Universitat Politècnica de València, 2012. http://hdl.handle.net/10251/16470.

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El propósito de la presente tesis doctoral es estudiar el efecto de la degradación térmica, biológica y fotolítica en la polilactida (PLA) para contribuir a la caracterización de este polímero biodegradable bajo diferentes condiciones o entornos. Este polímero procede de fuentes renovables y está considerado un excelente candidato para sustituir a otros materiales poliméricos con escasa degradabilidad. En este estudio se describen los mecanismos que regulan cada tipo de degradación y, lo que es más importante, cómo cada uno de ellos afecta a la variación de la masa molar del PLA. La monitoriza

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16

Zhou, Juncen [Verfasser], Rainer [Akademischer Betreuer] Fink, Sannakaisa [Gutachter] Virtanen, and Aldo [Gutachter] Boccaccini. "Surface treatments for iron-based biodegradable medical materials – modification of biodegradation behavior and surface functionalization / Juncen Zhou ; Gutachter: Sannakaisa Virtanen, Aldo Boccaccini ; Betreuer: Rainer Fink." Erlangen : Friedrich-Alexander-Universität Erlangen-Nürnberg (FAU), 2019. http://d-nb.info/1181428807/34.

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17

Vodička, Juraj. "Biodegradace bioplastů v prostředí kompostu." Master's thesis, Vysoké učení technické v Brně. Fakulta chemická, 2020. http://www.nusl.cz/ntk/nusl-413729.

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This master’s thesis focuses on biodegradation of polyhydroxybutyrate (PHB) and polylactic acid (PLA). The theoretical part discusses an origin, properties and applications of investigated biopolyesters, and so the enzymology of their biodegradation. The experimental part deals with biodegradation of these polymers in liquid medium using several pure thermophilic bacteial strains and controlled composting of these bioplastics. Amongst six tested thermophilic bacterial strains only one showed PHB-biodegradation activity – strain Schlegelella thermodepolymerans. No degradation degree of amorphou

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18

Asplund, Basse. "Biodegradable Thermoplastic Elastomers." Doctoral thesis, Uppsala : Acta Universitatis Upsaliensis Acta Universitatis Upsaliensis, 2007. http://urn.kb.se/resolve?urn=urn:nbn:se:uu:diva-7434.

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19

Goodby, Amanda. "Biodegradable thermoplastic polyurethanes." Thesis, Aston University, 2015. http://publications.aston.ac.uk/32134/.

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The overall aim of this work was to investigate the biodegradability of a number of polyurethane elastomers synthesised by different methods and targeted for a specific agricultural purpose in which the polyurethane was required to be degradable in soil after its useful life. Polyurethanes were synthesised commercially using two different methods; a ‘one-shot’ method where all of the reactants were added simultaneously, and a ‘pre-polymer’ method, in which the isocyanate and polyol were reacted together before addition of the chain extender. The effect of the method of synthesis on the rate of

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Kurt, Zohre. "Biodegradation of chlorinated compounds at interfaces and biodegradation of 4-nitroaniline." Diss., Georgia Institute of Technology, 2012. http://hdl.handle.net/1853/50111.

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Most microbial activity in nature takes place at interfaces where redox discontinuities are present. Organic pollutants in groundwater encounter oxic/anoxic interfaces when they emerge to surface water bodies or volatilize above the plume. Such oxic/anoxic interfaces are key habitats for aerobic bacteria and are in turn created by the bacteria that degrade organic electron donors. In the absence of biodegradation, synthetic pollutants can migrate from the plume and impact a variety of receptors. The aims of our study were to determine whether microbes at oxic/anoxic interfaces can use syntheti

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Wurstová, Agáta. "Studium biodegradace polyhydroxyalkanoátů." Master's thesis, Vysoké učení technické v Brně. Fakulta chemická, 2014. http://www.nusl.cz/ntk/nusl-217066.

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The master‘s thesis is focused on the study of biodegradation of polyhydroxyalkanoates, namely polymer polyhydroxybutyrate. The first part of the thesis is focused on the study of biodegradation of polyhydroxybutyrate in the form of crystalline granules of PHB and PHB films using selected species of microorganisms from bacteria, yeasts and fungi. As a representative of bacteria was chosen microorganism Delftia acidorovans, as yeast was selected Aureobasidium pullulans and Aspergillus fumigatus as fungi. PHB depolymerase activity was measured employing turbidemtiric method with suspension of PH

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Casadio, Ylenia Silvia. "Biodegradable PHEMA-based biomaterials." University of Western Australia. School of Biomedical, Biomolecular and Chemical Sciences, 2009. http://theses.library.uwa.edu.au/adt-WU2009.0173.

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[Truncated abstract] The synthetic hydrogel poly(2-hydroxyethyl methacrylate) (PHEMA) has been used as a biocompatible biomaterial in ocular devices, such as soft contact lenses, intraocular lenses and an artificial cornea. Due to its favourable properties as an already established (but non-biodegradable) biomaterial, PHEMA is an interesting candidate for use as a material for scaffolds in tissue engineering. A tenant of tissue engineering scaffolds is obtaining the appropriate porous morphology to allow for successful cellular attachment and support. PHEMA hydrogels exhibit varied morphologic

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23

Marino, Fabien. "Biodegradation of paraffin wax." Thesis, National Library of Canada = Bibliothèque nationale du Canada, 1999. http://www.collectionscanada.ca/obj/s4/f2/dsk1/tape8/PQDD_0030/MQ50640.pdf.

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Marino, Fabien. "Biodegradation of paraffin wax." Thesis, McGill University, 1998. http://digitool.Library.McGill.CA:80/R/?func=dbin-jump-full&object_id=21312.

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Nineteen bacteria were tested for growth on paraffin wax as the sole source of carbon. Paraffin wax is a solid mixture of hydrocarbons including n-alkanes ranging from C18H38 to C37H 76. Of the nineteen bacteria tested, four bacteria (Arthrobacter paraffineus ATCC 19558, Mycobacterium OFS, Pseudomonas fluorescens Texaco and Rhodococcus IS01) grew well on paraffin wax. However, only one, Rhodococcus IS01, was found to rapidly and completely degrade a mixture of paraffin wax liquefied with hexadecane using the Self-Cycling Fermentation (SCF) technology. This strain was able to degrade n-alkanes

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Suwattana, Siripan. "Biodegradable polymers via RAFT." Thesis, University of Leeds, 2011. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.549765.

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This research has shown that biodegradable monomer (5,6-benzo-2- methylene-1,3-dioxepane) (BMOO) can be achieved. Also its homo-and-eo- polymerisation can be successfully realised via RAFT and ROP polymerisation techniques. BMOO was synthesised with the modification via the dehydrobrornination of 5,6-benzo-2-(bromomethyl)-1,3-dioxepane in a good yield (95% yields). The homopolymerisation of BMOO were designed to produce a target OP of 200 via living "polymerisation" and complete ring-opening polymerisation. A narrow POI (1.09) and an M n= 4,697 g mol' were observed after 24 hours for the react

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McGrath, John W. "The biodegradation of organophosphonates." Thesis, Queen's University Belfast, 1995. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.295419.

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Zhong, Sheng-Ping. "Biodegradation of medical polymers." Thesis, University of Liverpool, 1992. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.333769.

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Arshad, Khubaib, and Muhammad Mujahid. "Biodegradation of Textile Materials." Thesis, Högskolan i Borås, Institutionen Textilhögskolan, 2011. http://urn.kb.se/resolve?urn=urn:nbn:se:hb:diva-20862.

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In this research work different textile materials were buried in soil and their biodegrading pattern will be studied after different specific period of times.<br>Program: Master Programme in Textile Technology

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Malandra, Lida 1975. "Biodegradation of winery wastewater." Thesis, Stellenbosch : University of Stellenbosch, 2003. http://hdl.handle.net/10019.1/16385.

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Thesis (MSc)--University of Stellenbosch, 2003.<br>ENGLISH ABSTRACT: Large volumes of wastewater are generated annually during the grape harvest season from various processing and cleaning operations at wineries, distilleries and other wine-related industries. South African regulatory bodies dictate that wastewater should have a pH of 5.5 to 7.5 and a chemical oxygen demand (COD) lower than 75 mg/L. However, winery wastewater has a typical pH of 4 to 5 and a COD varying between 2 000 and 12 000 mg/L. Urban wineries channel the wastewater to local sewage treatment facilities and are often

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Tikoo, Vidya. "Microalgal biodegradation of pentachlorophenol." Thesis, University of the West of England, Bristol, 1996. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.319256.

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Pentachlorophenol (PCP) is a chlorophenol with a pronounced biocidal activity that has led to its use in a number of applications. It was introduced in the 1930s as a preservative for timber and lumber and since then has found wide use as a biocide in agricultural and industrial applications. Many different physical, chemical and biological methods have been tried for the removal of PCP from wastewater. However, using microalgae for the removal of PCP and other organochlorine compounds from water may prove to be a cheaper alternative and give complete degradation of the compounds. The aim of t

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Shearer, Brad David. "Enhanced Biodegradation in Landfills." Thesis, Virginia Tech, 2001. http://hdl.handle.net/10919/33215.

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The objective of this paper is to evaluate the effectiveness of leachate recirculation and bioreactor landfills at enhancing biodegradation, and to optimize the operation of a bioreactor. Waste Management has been examining leachate recirculation landfills for several years. Samples of Municipal Solid Waste (MSW) from existing leachate recirculation (LR) landfills were collected and analyzed for several physical and biochemical properties. These parameters of interest were moisture content, pH, density, temperature, volatile solids, cellulose/lignin ratios, and biological methane potential

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PAULUS, SYLVIE. "Biodegradation de steranes petroliers." Université Louis Pasteur (Strasbourg) (1971-2008), 1993. http://www.theses.fr/1993STR13041.

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La biodegradation in vitro du 5-alpha-cholestane, par une souche de bacteries du sol du genre nocardia, a permis d'identifier plusieurs intermediaires de degradation par comparaison avec des standards. Ils resultent d'une part, de la degradation de la chaine laterale par un processus analogue a la beta-oxydation des acides gras, et d'autre part, d'une 4-alpha-hydroxylation. Les intermediaires caracterises precedemment ont ete recherches dans des echantillons biodegrades de sol pollue par du petrole. Differents isomeres du 20-carboxy-5-alpha-pregnane ont ete identifies. Si les acides carboxyliq

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Zibdeh, I. R., G. R. Lanza, and Phillip R. Scheuerman. "Biodegradation of Cresol Isomers." Digital Commons @ East Tennessee State University, 1995. https://dc.etsu.edu/etsu-works/2901.

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Cordi, Livia. "Estudo da biodegradação dos filmes de poli (e-caprolactona), da blenda poli (e-caprolactona)/amido e do composito poli (e-caprolactona)/amido/po de fibra de coco por fungos e bacterias." [s.n.], 2008. http://repositorio.unicamp.br/jspui/handle/REPOSIP/267251.

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Orientadores: Lucia Helena Innocentini Mei, Nelson Eduardo Duran Caballero<br>Dissertação (mestrado) - Universidade Estadual de Campinas, Faculdade de Engenharia Quimica<br>Made available in DSpace on 2018-08-12T06:47:43Z (GMT). No. of bitstreams: 1 Cordi_Livia_M.pdf: 21857462 bytes, checksum: 3e42c7ea2ad32da6e7427d4169ca05d6 (MD5) Previous issue date: 2008<br>Resumo: Imensurável é a quantidade de resíduos plásticos descartados no meio ambiente e o crescente desequilíbrio do mesmo. Esta situação leva ao desenvolvimento de novas formulações plásticas que sejam resistentes e funcionais enquant

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Princivalle, Jessica. "How important is soil microbial diversity for pesticide biodegradation function and robust biodegradation kinetics?" Thesis, University of Reading, 2017. http://centaur.reading.ac.uk/73803/.

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Soil microbial communities are highly diverse and implicated in delivering many ecosystem services including the degradation of pesticides. The aim of this thesis was to study the relationship between microbial species richness and pesticide biodegradation kinetics in order to contribute to the understanding of the causes of variability in pesticide degradation kinetics between test systems used as a component part of the discovery process for new crop protection active ingredients. This thesis was in collaboration with Syngenta who were keen to gain an understanding of the importance of soil

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Smith, Maree J. "Biodegradation of the cyanotoxin cylindrospermopsin /." [St. Lucia, Qld.], 2005. http://www.library.uq.edu.au/pdfserve.php?image=thesisabs/absthe18474.pdf.

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Tolentino, Chivite Ainhoa. "Ionic complexes of biodegradable polyelectrolytes." Doctoral thesis, Universitat Politècnica de Catalunya, 2014. http://hdl.handle.net/10803/144662.

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Biopolymers are polymers produced by living organisms. A more broad classification would embrace also those polymers synthesized from renewable sources which are able to display biodegradability. The demand of biopolymers has been continuously growing along these last decades. The main reason for such increasing interest is their sustainability; the renewable origin of biopolymers makes them inexhaustible in contrast with synthetic polymers produced from finite fossil sources. Biodegradability is a second advantage; due to the presence in the nature of enzymes able to degrade biopolymers under

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Lal, Sumit. "Biodegradable packaging from whey protein." Thesis, University of Auckland, 2012. http://hdl.handle.net/2292/13815.

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Biodegradable packaging films from whey protein concentrate were made in this study. A total of 46 formulations were made in the form of thin (50 - 120um) films by using solvent casting. Additives used in the formulations included plasticizers i.e glycerol and propylene glycol, chaotropic agent i.e guanidine thiocynate, gelation and crosslinker i.e glutaraldehyde. Tensile tests showed an increase in tensile strength with the addition of glutaraldehyde (1.2 v/v) and gelatin (upto 50% wt%). Addition of glycerol, propylene glycol and guanidine thiocynate increased elongation of films. Water vapor

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39

Phale, Prashant S. "Biodegradation Of 1-Naphthoic Acid." Thesis, Indian Institute of Science, 1994. http://hdl.handle.net/2005/91.

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Polycyclic aromatic hydrocarbons (PAHs) are compounds containing carbon and hydrogen atoms of fused benzene rings in linear, angular or cluster arrangements. These compounds have a large (negative) resonance energy, resulting in a thermodynamically stable structures. PAHs may also contain alkyl- and nitro-substituent groups. The complexity in these molecules can be generated by substituting the aromatic carbon atom with nitrogen, oxygen or sulfur, giving rise to heterocyclic PAHs.

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Zorlutuna, Pinar. "Cornea Engineering On Biodegradable Polyesters." Master's thesis, METU, 2005. http://etd.lib.metu.edu.tr/upload/3/12605779/index.pdf.

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ABSTRACT CORNEA ENGINEERING ON BIODEGRADABLE POLYESTERS Zorlutuna, Pinar M. Sc., Department of Biotechnology Supervisor: Prof. Vasif Hasirci Co-Supervisor: Asst. Prof. AySen Tezcaner January 2005, 66 pages Cornea is the outermost layer of the eye and has an important role in vision. Damage of cornea due to injuries or infections could lead to blindness lowering the quality of life of the patient severely. In such cases, transplantation or artificial corneas have been used for treatment but both had drawbacks. The novel approach for corneal replacements is the tissue engineering of th

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Goksu, Emel Iraz. "Hemicellulose Based Biodegradable Film Production." Master's thesis, METU, 2005. http://etd.lib.metu.edu.tr/upload/12605940/index.pdf.

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Xylan was extracted from cotton waste, characterized by DSC and TGA analysis and used in biodegradable film production. Pure cotton waste xylan did not form film. The presence of an unknown compound, as an impurity, yielded composite films. The unknown compound was determined as a phenolic compound, and most probably lignin, by using DSC and TGA analysis and Folin-Ciocalteau method. The effects of xylan concentration of the film forming solutions, glycerol (plasticizer) and gluten additions on thickness, mechanical properties, solubility, water vapor transfer rate, color and microstructure of

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42

Gilardi, Gianfranco. "Spectroscopic studies of lignin biodegradation." Thesis, Imperial College London, 1991. http://hdl.handle.net/10044/1/46785.

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43

Müller, Stefan. "Biodegradation of polyethylene thermolysis residue." Thesis, National Library of Canada = Bibliothèque nationale du Canada, 1998. http://www.collectionscanada.ca/obj/s4/f2/dsk1/tape11/PQDD_0005/MQ44028.pdf.

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44

Müller, Stefan 1971. "Biodegradation of polyethylene thermolysis residue." Thesis, McGill University, 1998. http://digitool.Library.McGill.CA:80/R/?func=dbin-jump-full&object_id=20509.

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The ability of several microorganisms to degrade polyethylene thermolysis residue was investigated. This residue is mainly comprised of n-alkanes and n-1-alkenes ranging in chain length of 15 to 45 carbon units and therefore resembles crude oil. The microorganisms investigated were: Y. lipolytica ATCC 8662, Y. lipolytica ATCC 20460, A. paraffineus ATCC 19558, P. aeruginosa PAO1, P. putida ATCC 12633, R. rhodochrous ATCC 21766 and Rhodococcus sp. ATCC 29671. It was found that all seven microorganisms tested were able to degrade the polyethylene thermolysis residue. Results suggest that R. rhodo

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Gauthier, Herve. "Biodegradation of pharmaceuticals by microorganisms." Thesis, McGill University, 2009. http://digitool.Library.McGill.CA:80/R/?func=dbin-jump-full&object_id=32347.

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The presence of pharmaceutical residues in water poses a serious treat to human health. The fate of many of these pharmaceuticals in the environment has not been thoroughly investigated. Sulfamethoxazole, sulfamethizole, trimethoprim and carbamazepine are among these pharmaceuticals with significant bioactivity that are considered to be persistent pollutants. The biodegradation of these compounds has been studied in this project in order to assess the fate of these pharmaceuticals in the environment. An e

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46

Haider, Anita. "Synthesis of functionalised biodegradable polyesters." Thesis, Imperial College London, 2008. http://hdl.handle.net/10044/1/12037.

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47

Dooley, S. "Biodegradation of machine cutting oil." Thesis, University of Cambridge, 2004. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.598601.

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The aim of this dissertation was to improve the biodegradation performance of a machine cutting oil employed in the processing of uranium at AWE. The machine cutting oil is chemically complex containing mineral oil, surfactants to improve emulsification and a phenolic biocide. Biodegradation was performed by a mixed culture of bacteria isolated from used cutting oil. Continuous, semi-batch and fed-batch systems were examined and stirred tanks and well-mixed biosupport reactors (immobilised cell systems) were compared. A continuous flow system was shown to provide a high rate of productivity wi

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Chongcharoen, Rotsaman. "Biodegradation of formaldehyde by methylotrophs." Thesis, University of Warwick, 2002. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.269080.

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Starkey, Michelle. "Biodegradation of lubricants in soil." Thesis, University of Reading, 2003. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.413409.

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Ali, Saiqa Mubeen. "Thermophilic biodegradation of phenolic compounds." Thesis, University College London (University of London), 1996. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.339092.

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