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Dissertations / Theses on the topic 'Volatile solvents'

Author: Grafiati

Published: 4 June 2021

Last updated: 16 February 2022

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1

Gajjar, Rachna M. "Absorption and Evaporation of Volatile Organic Solvents from Human Skin In Vitro." University of Cincinnati / OhioLINK, 2010. http://rave.ohiolink.edu/etdc/view?acc_num=ucin1282578243.

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2

Ray, Chaudhuri Siladitya. "Mathematical Modeling of Percutaneous Absorption of Volatile Solvents Following Transient Liquid-Phase Exposures." University of Cincinnati / OhioLINK, 2007. http://rave.ohiolink.edu/etdc/view?acc_num=ucin1179468433.

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3

Joubert, Wilhelm Hendrik. "Die effek van ototoksiese koolwaterstowwe op die gehoordrempels van werkers by 'n petrochemiese fabriek / Wilhelm Joubert." Thesis, North-West University, 2004. http://hdl.handle.net/10394/457.

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The aim of this study was to determine in an empirical manner whether the phenomenon of hearing loss due to the exposure to volatile organic solvents was present in the gasification plants of a petrochemical factory. The experimental groups included unexposed (N=20) workers, workers (N=20) exposed to noise and workers (N=19) exposed to noise and volatile organic solvents. The following assessments were made: diagnostic audiometry for the assessment of hearing thresholds; biological monitoring of ortho-cresol and hippuric acid for the biological markers of toluene; passive air sampling and nois

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4

Moufawad, Tarek. "Développement de nouveaux solvants de lavage pour l'absorption des Composés Organiques Volatils." Thesis, Littoral, 2019. http://www.theses.fr/2019DUNK0534.

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L(objectif de cette thèse a été de développer de nouveaux solvants d'absorption des composés organiques volatils (COV). Ces derniers sont des polluants atmosphériques primaires généralement utilisés comme solvants et émis directement par les industries. Ils induisent des effets nocifs pour la santé, et certains d'entre eux, sont classés comme cancérogènes. La réduction des émissions de ces polluants reste donc une préoccupation majeure. L'objectif de notre travail a été d'évaluer les solvants eutectiques profonds (DES) comme absorbants pour les COV. Les DES représentent une nouvelle génération

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5

El, Achkar Tracy. "Deep eutectic solvents : characterization, interaction with synthetic and biological membranes, and solubilization of bioactive volatile compounds." Thesis, Littoral, 2020. http://www.theses.fr/2020DUNK0562.

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Les solvants eutectiques profonds (DES) sont récemment apparus comme une nouvelle classe de solvants verts présentant un potentiel élevé pour remplacer les solvants organiques usuels. Bien que découverts récemment, les DES ont fait l'objet de nombreuses recherches au cours des dernières années en raison de leurs propriétés intéressantes. Cependant, il reste encore beaucoup à découvrir étant donné le nombre quasiment illimité de DES potentiels et de leur polyvalence. Notre étude vise à examiner l'effet des DES sur les liposomes, adoptés comme modèles membranaires, et sur les membranes cellulair

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6

Tomlin, Douglas James. "The enhancement of the incineration of model volatile organic solvents by the use of hydrogen peroxide as a novel oxidative homogeneous catalyst." Master's thesis, University of Central Florida, 1990. http://digital.library.ucf.edu/cdm/ref/collection/RTD/id/52610.

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7

Silva, Bianca Carvalho da. "Avaliação da toxicidade de quatro solventes e um surfactante, e dos fenilpropanoides eugenol e (E)-cinamaldeído sobre larvas e pupas de Musca domestica Linnaeus, 1758 (Diptera: Muscidae)." Universidade Federal de Juiz de Fora (UFJF), 2016. https://repositorio.ufjf.br/jspui/handle/ufjf/4062.

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Submitted by Renata Lopes (renatasil82@gmail.com) on 2017-04-17T11:56:32Z No. of bitstreams: 1 biancacarvalhodasilva.pdf: 1674027 bytes, checksum: c5eec1256778b071c02c01d37079c6bc (MD5)<br>Approved for entry into archive by Adriana Oliveira (adriana.oliveira@ufjf.edu.br) on 2017-04-18T13:39:20Z (GMT) No. of bitstreams: 1 biancacarvalhodasilva.pdf: 1674027 bytes, checksum: c5eec1256778b071c02c01d37079c6bc (MD5)<br>Made available in DSpace on 2017-04-18T13:39:20Z (GMT). No. of bitstreams: 1 biancacarvalhodasilva.pdf: 1674027 bytes, checksum: c5eec1256778b071c02c01d37079c6bc (MD5) Previous

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8

O'Connor, D. J. "Glue sniffing and volatile solvent abuse by schoolchildren and adolescents." Thesis, University of Newcastle Upon Tyne, 1986. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.378847.

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9

Zivic, Nicolas. "Synthèse de naphtalimides et dicétopyrrolopyrroles originaux pour les photopolymérisations radicalaire et cationique dans des conditions d'irradiation douces." Thesis, Aix-Marseille, 2017. http://www.theses.fr/2017AIXM0056/document.

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La photopolymérisation joue un rôle prééminent dans l'industrie comme en témoigne son nombre d'applications croissant dans des domaines classiques tels que les revêtements, les encres et les adhésifs mais aussi dans des domaines de haute technologie comme l’optoélectronique, l’imagerie laser, la stéréolithographie et la nanotechnologie. En effet, la photopolymérisation présente de nombreux avantages. C’est un processus rapide. Elle peut être réalisée à température ambiante et/ou sans solvant, permettant ainsi de limiter la formation de COV. Enfin, la photopolymérisation permet de réticuler dan

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10

Van, Rensburg Eulouka Janse. "Solvent extraction of South African coal using a low volatile, coal-derived solvent / Eulouka Janse van Rensburg." Thesis, North-West University, 2007. http://hdl.handle.net/10394/1855.

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Coal is an important fuel for countries with large coal reserves such as South Africa since it is expected that oil and natural gas prices will continue to rise. The Waterberg coalfield contains 40% of South Africa's remaining coal reserves, but due to the lack of a good infrastructure (water and railway) there are currently only a few operations in the Waterberg. The utilization of remote coal reserves, such as the Waterberg coalfield, is difficult and requires an investigation of possible coal conversion processes. The extraction of high-ash bituminous coal, using an organic solvent, had bee

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11

Ojala, S. (Satu). "Catalytic oxidation of volatile organic compounds and malodorous organic compounds." Doctoral thesis, University of Oulu, 2005. http://urn.fi/urn:isbn:9514278704.

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Abstract This thesis describes efforts made on the development of an existing catalytic incinerator. The development work, called process characterization, consists of four general parts. These are the development of measurement methodology, the studying of construction materials, the selection of suitable catalysts and the testing of the effects of process operation conditions. The two application areas for catalytic incineration considered in this thesis are solvent emission abatement (VOC, volatile organic compounds) and chip bin emission abatement (SVOC, sulphur-containing volatile organic

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12

Foschini, Fabrizio. "Sviluppo di un metodo di analisi degli acidi grassi volatili nella produzione di biogas." Master's thesis, Alma Mater Studiorum - Università di Bologna, 2019. http://amslaurea.unibo.it/17969/.

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Gli acidi grassi volatili (VFA) sono importanti intermedi di reazione nel processo di digestione anaerobica, costituendo uno dei migliori parametri per il monitoraggio dei digestori nella produzione di biogas. Diversi metodi sono stati sviluppati per la determinazione della concentrazione dei singoli VFA, e la tecnica più largamente diffusa è quella della iniezione diretta in fase acquosa abbinata a gascromatografia in ionizzazione di fiamma (GC-FID). In questa tesi è stato sviluppato un metodo alternativo basato sulla estrazione dei VFA dal digestato con il solvente dimetilcarbonato (DMC). La

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13

GOMES, RAPHAEL F. "Avaliação de compostos orgânicos semi-voláteis em amostras de águas subterrâneas via CG/EM utilizando microextração líquido-líquido dispersivo - DLLME." reponame:Repositório Institucional do IPEN, 2014. http://repositorio.ipen.br:8080/xmlui/handle/123456789/23176.

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Submitted by Claudinei Pracidelli (cpracide@ipen.br) on 2014-12-19T17:05:43Z No. of bitstreams: 0<br>Made available in DSpace on 2014-12-19T17:05:43Z (GMT). No. of bitstreams: 0<br>Dissertação (Mestrado em Tecnologia Nuclear)<br>IPEN/D<br>Instituto de Pesquisas Energeticas e Nucleares - IPEN-CNEN/SP

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14

Lorne, Jean-Luc. "Etude de l'extraction au dioxyde de carbone supercritique des composes volatils." Paris 7, 1988. http://www.theses.fr/1988PA077108.

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L'extraction au dioxyde de carbone supercritique des composes volatils s'est revelee efficace en maintenant des conditions experimentales moderees (cent cinquante bars, trente six degres). On a tente de remedier aux pertes en ajoutant dans l'appareil au niveau du separateur, differents milieux de piegeage (huile, glycerol, cyclodextrines) pouvant retenir les composes volatils. Un des interets de ces milieux reside dans la possibilite de les utiliser directement dans le domaine de l'agro-alimentaire. Les milieux se sont reveles, chacun avec sa specificite, capable d'ameliorer la recuperation de

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15

Alonso, Roura Mònica. "Development of new solvent-free microextraction techniques for the analysis of volatile organic compounds: application to the use of breath analysis as a toxicological tool for explosure analysis." Doctoral thesis, Universitat de Girona, 2012. http://hdl.handle.net/10803/107880.

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Hippocrates predicted many years ago that breath could tell something related with our health. On his treaties, he indicated that when the body starts moving after sleeping, and breathe with more frequency, something hot and acid is expelled with air. It is possible to predict a disease from breath, but it has not been until recent years that last developments in breath analysis has allowed to detect compounds precisely and to associate the presence of these compounds to certain diseases. The use of breath analysis in clinical diagnosis and exposure to contaminants presents great advantages as

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16

Buckley-Smith, Marion. "The Use of Solubility Parameters to Select Membrane Materials for Pervaporation of Organic Mixtures." The University of Waikato, 2006. http://hdl.handle.net/10289/2625.

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Pevaporation is a method for separating volatile components from liquid mixtures at ambient temperatures. The paint processing industry uses Hansen solubility parameters (HSP) to indicate polymer solubility. The potential of this method to predict solvent-polymer affinity was investigated for screening potential membrane materials for the pervaporation of a model solution containing linalool and linalyl acetate (major components of lavender essential oil), in ethanol. Published HSP values were collated for various polymers, and statistically analysed to determine variations in HSP values for p

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17

Sun, Yung-Hsiang, and 孫永翔. "Enhanced Sensing property of volatile organic solvents vapor by silicon nanowires device." Thesis, 2013. http://ndltd.ncl.edu.tw/handle/53959061079508008756.

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碩士<br>國立臺灣師範大學<br>機電科技學系<br>101<br>Herein this study reports the preparation of silicon nanowires by using the electroless chemical etching method. Different lengths of silicon nanowires array can be obtained by changing the etching time. These arrays are used as sensors in detection of volatility organic solvents. We can obtain the longer length of silicon nanowires by increasing the etching time. The sensitivity of organic solvents will be increased depending on the length of silicon nanowires. We choose n-pentane, n-Hexane, methanol, ethanol and acetone as the organic solvents and report th

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18

shuanho, liu, and 劉順和. "The study of improvement for volatile organic solvents (VOCs) gas treatment of polarizer plant." Thesis, 2011. http://ndltd.ncl.edu.tw/handle/06745288466917250890.

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碩士<br>國立交通大學<br>工學院碩士在職專班產業安全與防災組<br>99<br>Since the rise of TFT industry, polarizer industry also expanded in recent years, and people are aware that Polarizer plants bring pollution, because plants use a large number of organic solvents, after through those process of gel scene, coating, drying and so on, generating many VOCs (volatile organic solvents) emissions. These VOCs emissions have wind volume, high concentration and high heating value, etc., and production feature as a result of batch production model, in exchange membrane and disposal membrane assignments, the concentration of the

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19

Huang, Cheng-Fu, and 黃成富. "The Study of Volatile Organic Solvents (VOCs) Emission Reduction of Semiconductor Manufacturing in IPA Wet Cleaning Process." Thesis, 2017. http://ndltd.ncl.edu.tw/handle/f99z88.

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20

Mota, Rute Marina Faria. "Leveraging cross-filtration membranes to extend the production of amorphous solid dispersions (ASDs) to non-volatile organic solvents." Master's thesis, 2020. http://hdl.handle.net/10362/111051.

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Currently, about 90% of drugs in development stages present poor-aqueous solubility, belonging to Biopharmaceutics Classification System (BCS) Classes II and IV. A leading technology to improve solubility is the production of amorphous solid dispersions (ASDs). ASDs are typically manufactured by spray drying (SD) and hot melt extrusion (HME), however these techniques are not suitable for “brick-dust” compounds. Coprecipitation is an adequate technology to deal with “brick-dust” compounds, since high boiling point solvents, with higher solubilization power, can be employed. This technology is

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21

Leal, Teresa Fernandes Argente. "Dating of writing inks based on the study of volatile compounds / Datação forense de escrita manual através da análise de componentes voláteis de tintas." Master's thesis, 2019. http://hdl.handle.net/10400.26/31077.

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Dissertação para obtenção do grau de Mestre no Instituto Universitário Egas Moniz<br>Background: One of the major challenges in forensic document analysis is estimating the age of an ink deposition on a manually written document. Objective: The present work aims to develop and optimize a methodology based on the evaporation of volatile compounds over time that can be used to solve real forensic case studies. Materials and methods: Nine pens (5 viscous inks + 4 liquid inks), purchased in commercial areas, were preliminarily analysed, and ink deposition began in September 2016. Initial volatile

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22

Jiang-Chiou, Mau, and 毛建秋. "Study of the Fiber Grating Sensor for Detecting Volatile Solvent Vapors." Thesis, 2005. http://ndltd.ncl.edu.tw/handle/47688488190449714643.

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碩士<br>國防大學中正理工學院<br>電子工程研究所<br>93<br>In this thesis, a fiber sensor, based on the poly-aniline coating technique on the surface of an etched fiber grating to create sensing film, is developed for detecting volatile solvent vapors. A loaded-hydrogen photosensitive fiber is used for fabricating a superstructure optical fiber grating with the reflection intensity of 20 dB by using UV laser going through an amplitude mask and a phase mask writing technique. The cladding layer of the superstructure is firstly etched down in diameter from 125 to 15 µm by the hydrofluoric acid solution and then the p

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23

De, Boer Tracy. "Constructing hope in challenging spaces: narratives by health professionals on issues of solvent use." 2013. http://hdl.handle.net/1993/18301.

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The process of recovery from addiction is a multifaceted process that involves the efforts of clients, professionals and the broader community. Additional challenges to recovery are present for individuals who use solvents. This study investigates how professionals, involved in the provision of services to clientele who use solvents, understand the process of healing in their collaborative work. Using a narrative methodology, semi-‐structured interviews were conducted with professionals employed in providing recovery-based services to individuals who use volatile solvents. The stories of the

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24

Liao, Pel-Hu, and 廖培湖. "Synergestic Effect of Volatile Organic Solvent -Toluene and 2-Butanone on the Biological Toxicity of Cadmium." Thesis, 1999. http://ndltd.ncl.edu.tw/handle/93548852869525875543.

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碩士<br>中山醫學院<br>毒理學研究所<br>87<br>As a crowd living place, Taiwan has little tolerance toward environmental hazard. Therefore, emissions of the pollutant have not only disrupted the balance of environment but also caused severe impact to human being. Human exposure to organic solvents is widespread and occurs regularly. The principal routes of direct exposure to organic solvents are skin and inhalation. Organic solvent like toluene and methyl ethyl ketone(MEK) is widely used in industry and is well known to be neurotoxic and naphrotoxic. It is often used with other pollutants. Toluene and m

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25

Govender, Hogantharanni. "A comparative study of solvent extraction, Soxhlet extraction, steam distillation, headspace analysis and headspace solid phase microextraction for the extraction of volatile terpenoid compounds in the curry leaf plant (Murraya koenigii)." Thesis, 2010. http://hdl.handle.net/10413/5425.

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A comparative study was undertaken of different extraction methods for the isolation of volatile organic compounds from Murraya koenigii (curry leaf plant). The techniques studied included the traditional methods of extraction, namely, Soxhlet and solvent extraction as well as steam distillation. The solvent–free extraction techniques of headspace analysis and headspace solid phase micro-extraction (HS-SPME) were also investigated. In the evaluation of SPME, two different fibre coatings, poly(dimethylsiloxane) and poly(acrylate), were compared. Preliminary work to determine the effect of extra

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