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Dissertations / Theses on the topic 'Xylen'

Author: Grafiati
Published: 4 June 2021
Last updated: 1 February 2022

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1

Genberg, Malin, and Helen Ahlgren. "Avparaffinering med Xylen versus Ttissue- clear för vävnadsmaterial vid flödescytometrisk analys av DNA ploidi." Thesis, Hälsohögskolan, Högskolan i Jönköping, HHJ. Biomedicinsk plattform, 2017. http://urn.kb.se/resolve?urn=urn:nbn:se:hj:diva-36539.

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Sandberg, Therese, and Rebecka Fridén. "Utbyte av xylen till Tissue Clear som avparaffineringsmedel vid diagnostik av endometrioid carcinom med DNA-ploidi." Thesis, Hälsohögskolan, Jönköping University, HHJ, Avd. för naturvetenskap och biomedicin, 2020. http://urn.kb.se/resolve?urn=urn:nbn:se:hj:diva-48782.

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Flödescytometrisk analys av DNA-ploiditeten används vid diagnostisering av endometriecancer. DNA-ploidi reflekterar cellcykeln och avgör om tumörens cellpopulationen är diploid eller aneuploid, där aneuploiditet förknippas med sämre prognos. Vid analys av paraffininbäddat vävnadsmaterial används avparaffineringsmedlet xylen, vars toxiska egenskaper försämrar arbetsmiljön på laboratoriet. Den har en stark och obehaglig lukt som kan orsaka illamående och yrsel. Syftet med studien var att undersöka om xylen kan ersättas med xylensubstitutet Tissue Clear, ett isoparaffinskt kolväte som är mindre t
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3

Cavalcanti, Leonardo Sousa. "Papel da celulase XF-0818 na interação Xylella fastidiosa X Citros." Universidade de São Paulo, 2005. http://www.teses.usp.br/teses/disponiveis/11/11135/tde-16052005-162932/.

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A partir do sequenciamento do genoma da bactéria Xylella fastidiosa, agente causal da clorose variegada dos citros (CVC), estudos sobre os mecanismos de patogenicidade expressos durante a doença foram iniciados em projetos de genômica funcional, com o objetivo de confirmar a função das sequências gênicas identificadas no projeto Genoma de X. fastidiosa. Dentre esses mecanismos destacam-se as enzimas envolvidas no processo de ataque da bactéria. O presente trabalho teve como alvo de estudo a seqüência gênica denominada Xf-0818, clonada em Escherichia coli através da inserção em plasmídeo pET
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4

Milesson, Joel, and Erika Abrahamsson. "Geoenergilager Xylem : Visualisering och lönsamhet." Thesis, Linnéuniversitetet, Institutionen för bygg- och energiteknik (BE), 2013. http://urn.kb.se/resolve?urn=urn:nbn:se:lnu:diva-27037.

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Inom svensk process- och tillverkningsindustri finns det stora mängder spillvärme som sällan kommer till användning. Att hitta olika tekniska lösningar för att effektivt tillvarata denna spillvärme skapar både nytta ur ett hållbart perspektiv samt ur ett ekonomiskt perspektiv för företaget. I denna rapport presenteras en utarbetad beräkningsmodell i Excel. Beräkningsmodellen används för att uppskatta lönsamheten för anläggning av ett högtemperaturlager i berggrunden. Excel-filen ska kunna användas för företag som en första uppskattning om ett borrhålslager är ett alternativ för tillvaratagande
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5

Mansoor, Zaheer Ahmad. "Xylan as Strength Enhancing Additive." Thesis, KTH, Skolan för kemivetenskap (CHE), 2012. http://urn.kb.se/resolve?urn=urn:nbn:se:kth:diva-145861.

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The effect of xylan from different plant species on tensile properties of spruce pulp was studied. Xylans from spruce, birch, wheat straw and rice husks were mixed with the fresh white liquor and added at the later stages of separate kraft cooks, in exchange of the black liquor removed from the system at that time. Results show that xylans, from rice husk, wheat straw and birch, gave stronger pulps. However it was only possible to attach small quantities of xylans onto the fibers. Moreover, pulps containing birch and rice xylan were easier to beat than the other pulps in the study.
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6

Wu, Haiyang. "Characterizing xylan-degrading enzymes from a putative Xylan Utilization System derived from termite gut metagenome." Thesis, Toulouse, INSA, 2018. http://www.theses.fr/2018ISAT0039.

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Dans le contexte de la bioéconomie, la découverte et la caractérisation des enzymes capables de dégrader la paroi végétale est particulièrement intéressante pour l’utilisation de la biomasse lignocellulosique dans l’industrie. A cet égard, la métagénomique fonctionnelle est un outil puissantpour découvrir de nouvelles enzymes à partir d’écosystèmes microbiens variés, comme l’illustrent les travaux sur le tube digestif du termite Pseudacanthotermes militaris. Cette étude a fourni une mine d’informations et identifié un hypothétique locus d’utilisation du xylane (XUS), codant pour cinq glycoside
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7

Ismail, Ihab. "Function and Regulation of Xylem Cysteine Protease 1 and Xylem Cysteine Protease 2 in Arabidopsis." Diss., Virginia Tech, 2003. http://hdl.handle.net/10919/11243.

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A functional water-conducting system, the tracheary elements of the xylem, is required to sustain plant growth and development. Tracheary element formation is dependent on many biological processes terminated by programmed cell death and cellular autolysis. The final two processes are probably dependent on the activity of hydrolytic enzymes such as XCP1 and XCP2 known to be expressed in tracheary elements during these final two processes. Thus, the transcriptional regulation of XCP1 and the function of XCP2 were investigated. Qualitative and quantitative assessments of GUS activity as directed
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8

Courtois-Moreau, Charleen Laetitia. "Programmed Cell Death in Xylem Development." Doctoral thesis, Umeå universitet, Umeå Plant Science Centre, 2008. http://urn.kb.se/resolve?urn=urn:nbn:se:umu:diva-1831.

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Concerns about climate changes and scarcity of fossil fuels are rising. Hence wood is becoming an attractive source of renewable energy and raw material and these new dimensions have prompted increasing interest in wood formation in trees, in both the scientific community and wider public. In this thesis, the focus is on a key process in wood development: programmed cell death (PCD) in the development of xylem elements. Since secondary cell wall formation is dependent, inter alia, upon the life time of xylem elements, the qualitative features of wood will be affected by PCD in xylem, about whi
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9

Zeng, Wei. "Glucurono(Arabino)Xylan Biosynthesis in Wheat." View abstract, 2009. http://gateway.proquest.com/openurl?url_ver=Z39.88-2004&res_dat=xri:pqdiss&rft_val_fmt=info:ofi/fmt:kev:mtx:dissertation&rft_dat=xri:pqdiss:3372366.

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10

Rauschenberg, Nancy Carol. "Thermoplastic xylan derivatives and related blends." Thesis, This resource online, 1991. http://scholar.lib.vt.edu/theses/available/etd-03172010-020606/.

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11

Blanc, Nuno Menezes Fontes Faria. "Xylan methylation and synthesis in Arabidopsis." Thesis, University of Cambridge, 2014. https://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.708329.

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12

Ramchander, Krithika. "Development of xylem-based water filters." Thesis, Massachusetts Institute of Technology, 2016. http://hdl.handle.net/1721.1/104270.

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Thesis: S.M., Massachusetts Institute of Technology, Department of Mechanical Engineering, 2016.<br>Cataloged from PDF version of thesis.<br>Includes bibliographical references.<br>Diarrheal diseases caused due to microbial contamination are one of the leading causes of fatalities amongst children. Despite the availability of numerous commercial products for water filtration and treatment, there continues to be a need for technological solutions that can make safe drinking water affordable and accessible. Due to their low cost, high filtration rate per unit weight and the ability to be manufac
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13

Galicki, Stanley J., Gregg R. Davidson, and Stephen T. Threlkeld. "Element Mobility In Bald Cypress Xylem." Tree-Ring Society, 2008. http://hdl.handle.net/10150/622564.

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Trace element mobility in bald cypress (Taxodium distichum) was investigated for a suite of elements using cores from century-old trees from a wetland in Humphreys County, Mississippi. Element mobility was determined by comparing the dendrochemistry of decadal increments over the life span of a tree, and by comparing increments of the same age collected from the same tree during two different seasons. Variability within growth increments at the time of sampling was evaluated by comparing cores from the same tree collected at three points around the bole. Of 42 elements analyzed, eight were f
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14

Schauer, Anke. "Komplexierung von Nickelionen an Pektin." [S.l. : s.n.], 2001. http://deposit.ddb.de/cgi-bin/dokserv?idn=964609770.

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15

Nygren, Cathrine. "Recovery of chemicals in xylan extraction process." Thesis, Linköping University, Department of Physics, Chemistry and Biology, 2009. http://urn.kb.se/resolve?urn=urn:nbn:se:liu:diva-17775.

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<p><p>Food packages containing products such as fruit juices, coffee, snacks and spices need to have barriers that can prevent oxygen, aroma substances and grease to diffuse through the packages in order to maintain or extend a certain quality of the product. Today those barriers consist of aluminium and ethylene-vinyl alcohol (EVOH) plastics, based on petroleum. The prices for these materials are raising and the growing shortage of fossil fuels eager the needs for an alternative to existing barriers.</p><p>It has been shown that hemicelluloses can be treated to form films with low permeabilit
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16

Dhami, Rajesh. "Hydrodynamic studies of xanthan and xylan systems." Thesis, University of Nottingham, 1996. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.321379.

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17

Marchand, Célia. "Design and Preparation offilms from Birchwood Xylan." Thesis, KTH, Skolan för kemi, bioteknologi och hälsa (CBH), 2018. http://urn.kb.se/resolve?urn=urn:nbn:se:kth:diva-231417.

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Using and finding applications from biomass is and will continue to be an important subject forresearch, and biomass from trees, has shown several outstanding aspects other than just for the pulpand paper applications. It is now, more than ever, time to find efficient uses for all the woodcomponents, in particular, the hemicelluloses. The hemicelluloses account for approximately onethirdof a dry composition of lignocellulosic wood biomasses. Of these hemicelluloses, xylan is themost abundant in many plants, particularly in hardwood. As for the Swedish forestry, xylan frombirch is considered as
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18

Sridhar, Varshini. "Proteomic studies of grape xylem tissue and sap." Thesis, Florida Agricultural and Mechanical University, 2015. http://pqdtopen.proquest.com/#viewpdf?dispub=1594029.

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<p> Pierce&rsquo;s disease (PD), caused by bacterium Xylella fastidiosa, seriously hampers the cultivation of <i>Vitis vinifera</i> also known as bunch grapes, in different parts of the world. The bacterium clogs xylem vessels and forms a biofilm, resulting in the wilting of the plant. Bunch grape cultivars exhibit certain degree of tolerance to PD, however most commercial cultivars suffer heavy loss due to this devastating disease. Therefore, studies on genetic variation for disease tolerance will assist in identification of key molecular components that confer tolerance to PD. <i>Vitis</i> s
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19

Den, Haan Riaan. "Engineering of Pichia stipitis for enhanced xylan utilization." Thesis, Stellenbosch : Stellenbosch University, 2003. http://hdl.handle.net/10019.1/53409.

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Thesis (PhD)--Stellenbosch University, 2003.<br>ENGLISH ABSTRACT: Plant biomass, the most abundant renewable resource in nature, consists of matrices of mainly lignin, cellulose, hemicellulose as well as inorganic components. Xylan, the major hemicellulose component in plant cell walls, is the most abundant polysaccharide after cellulose. This makes the main constituent sugar of xylan, D-xylose, the second most abundant renewable monosaccharide in nature. Very few hemicelluloses are either homopolymeric or entirely linear. Therefore, the variety of enzymes involved in their hydrolysis i
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20

Gilliham, Matthew. "Regulation of ion loading to maize root xylem." Thesis, University of Cambridge, 2002. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.620512.

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21

Watson, Richard James. "The development of a novel technique for sampling xylem sap from intact, transpiring plants using Philaenus spumarius, a xylem-feeding insect." Thesis, University of Birmingham, 1999. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.391384.

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Many approaches have been employed to extract xylem sap from plants but uncertainty remains about exactly what is sampled by these methods and the extent to which extracted fluid reflects the content of the transpiration stream. The aim of this thesis was to develop a new technique for sampling xylem sap from intact, transpiring plants, using the common spittlebug Philaenus spumarius, a xylem-feeding insect. Continuous monitoring of the insect's excretion rate was achieved through a balance system connected to a computer. Using this procedure, it was demonstrated that P. spumarius feeds from t
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22

Danielsson, Sverker. "Xylan Reactions in Kraft Cooking : Process and Product Considerations." Doctoral thesis, KTH, Träkemi och massateknologi, 2007. http://urn.kb.se/resolve?urn=urn:nbn:se:kth:diva-4551.

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Xylan is the main hemicellulose in birch, eucalyptus, and most other hardwood species. During kraft pulping a series of chemical reactions and physical processes involving xylan takes place. The processes studied here are the following: dissolution, degradation, redeposition onto the fibres, side-group conversion, and cleavage of side groups off the xylan backbone. The side group in native xylan consists of methylglucuronic acid, which is partly converted into hexenuronic acid during kraft cooking. Hexenuronic acid affects the pulp in terms of increased brightness reversion and reduced bleacha
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Winzell, Anders. "Investigation of genes and proteins involved in xylan biosynthesis." Doctoral thesis, KTH, Glykovetenskap, 2010. http://urn.kb.se/resolve?urn=urn:nbn:se:kth:diva-11897.

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Wood formation or xylogenesis is a fundamental process for so diverse issues as industry, shelter and a sustainable environment. Wood is comprised of secondary xylem, rigid large cells with thick cell walls that are lignified. The basis for the sturdy cells is an advanced composite made up of cellulose fibers cross-linked by hemicelluloses and finally embedded in lignin. This fiber-composite is the secondary cell walls of woody plants. Cell division and differentiation is regulated by switching on and off genes. Proteins encoded by these genes execute the major functions in the cells. They ste
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24

Danielsson, Sverker. "Xylan Reactions and their Influence on Paper Sheet Properties." Licentiate thesis, KTH, Fibre and Polymer Technology, 2006. http://urn.kb.se/resolve?urn=urn:nbn:se:kth:diva-3850.

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<p>Xylan is the main hemicellulose in birch, eucalyptus, and most other hardwood species. During kraft pulping a series of chemical reactions and physical processes involving xylan take place. The processes studied in this thesis are the following: dissolution, degradation, redeposition onto the fibres, side group conversion, and cleavage of side groups off the xylan back bone. The side group in native xylan consists of methylglucuronic acid, which is mainly converted into hexenuronic acid during kraft cooking. Hexenuronic acid affect the pulp in terms of increased brightness reversion and det
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25

Bollhöner, Benjamin. "Significance of hydrolytic enzymes expressed during xylem cell death." Doctoral thesis, Umeå universitet, Institutionen för fysiologisk botanik, 2013. http://urn.kb.se/resolve?urn=urn:nbn:se:umu:diva-81340.

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Xylem is an inherent feature of all vascular plants and functions in water transport and mechanical support. In order to efficiently transport water, xylem cells are reinforced by secondary walls before they undergo programmed cell death and their cell contents are removed by autolysis to create a hollow tube. During their differentiation, xylem cells express various hydrolytic enzymes, such as proteases, nucleases and lipases, but only in a few examples has their role in xylem cell death been characterized. This thesis focuses on the regulatory aspects of xylem cell death and the autolytic ce
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He, Lin. "Studies on xylan depolymerisation by the mesophile Streptomyces A451." Thesis, Open University, 1991. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.303667.

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27

Robson, David J. "Physical aspects of cavitation and freezing in conifer xylem." Thesis, University of Aberdeen, 1986. http://digitool.abdn.ac.uk/R?func=search-advanced-go&find_code1=WSN&request1=AAIU362721.

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Part I details work on cavitation, refilling and permeability of conifer xylem. Part II shows how conifers may avoid widespread cavitation during freezing of the xylem sap. PART I Cavitation was induced in sapwood samples by sealing wood in semi-permeable membranes and immersion in osmotic solutions. Emptying of up to 20-30% of the tracheids occurred for absolute pressures of between 1.0 x 105 N. m-2and -4 x 105 N m-2but very little further emptying occurred when the pressure was lowered to -9 x 105 N m-2. The limit of emptying found for this range of pressures indicates that one type of trach
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28

Herrala, Steneros Jonathan, and Johan Olsson. "Utökat serviceintervall : Utökat serviceintervall för smältugnar hos Xylem Inc." Thesis, Linnéuniversitetet, Sjöfartshögskolan (SJÖ), 2017. http://urn.kb.se/resolve?urn=urn:nbn:se:lnu:diva-63857.

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Syftet med denna studie var att finna en metod för Xylem inc, i Emmaboda, att mäta slitaget på ugnsinfodringen i deras smältugnar. Undersökningen genomfördes med hjälp av en kartläggning om hur gjuterier i Sverige mäter infodringen på sina smältugnar, vidare vilka produkter som finns på marknaden idag för att kunna finna den metod som passar bäst för Xylem inc. I huvudsak togs kontakt via telefon och mail med gjuterier och olika produkttillverkare samt ett besök hos Federal mogul, vilka har ett systemen som är i drift. Information från ett fungerande system är av intresse fo
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29

Kim, Jong Sik. "Immunolocalization of Hemicelluloses in Differentiating Xylem of Cryptomeria japonica." Kyoto University, 2011. http://hdl.handle.net/2433/142344.

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Kyoto University (京都大学)<br>0048<br>新制・課程博士<br>博士(農学)<br>甲第16146号<br>農博第1882号<br>新制||農||991(附属図書館)<br>学位論文||H23||N4616(農学部図書室)<br>28725<br>京都大学大学院農学研究科森林科学専攻<br>(主査)教授 髙部 圭司, 教授 髙野 俊幸, 教授 杉山 淳司<br>学位規則第4条第1項該当
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30

Burgdorf, Martin. "Xylem-Saftfluss und Sauerstoffversorgung im Stamm von Betula pendula Einfluss von Xylem-Saftfluss und Gaskonzentrationen auf die Sauerstoffversorgung des Xylems von Betula pendula /." [S.l.] : [s.n.], 2006. http://deposit.ddb.de/cgi-bin/dokserv?idn=983292728.

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31

Jansson, Zheng. "Characterization of Spruce Xylan and Its Potential for Strength Improvement." Licentiate thesis, KTH, Träkemi och massateknologi, 2013. http://urn.kb.se/resolve?urn=urn:nbn:se:kth:diva-119920.

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Xylan dissolved during kraft cooking and later redeposited on fibre surfaces has been shown to give higher pulp yield and better strength properties. This is economically interesting from an industrial point of view. Many studies have been done to investigate xylan behaviour during kraft cooking, to discover the xylan-cellulose attachment mechanism, to find the optimal xylan retention or adsorption process, and to discover relations between xylan structure and strength enhancement. Most of them have concentrated on hardwood xylan. However, softwoods are the major raw materials for the pulp ind
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32

Ellis, Peter Richard. "Reactions of unsaturated hydrocarbons catalysed by transition metal compounds." Thesis, Durham University, 1998. http://etheses.dur.ac.uk/4783/.

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A range of different heterogeneous catalysts for the isomerisation of ortho-xylene have been prepared and evaluated. These included commercially-available samples, supported metal catalysts and zirconia-based catalysts. The greatest activity was seen for the former, which was found also to be active for a number of related reactions. Zirconia-based catalysts, in particular sulphated zirconia, gave significant activity. It was possible to prepare a catalyst to give 9.5% conversion of ortho-xylene per gram of catalyst with good selectivity to the meta isomer. The catalyst was prepared in two way
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33

Uroic, Miran Kalle. "The impact of arsenic species on the production and composition of xylem sap." Thesis, University of Aberdeen, 2011. http://digitool.abdn.ac.uk:80/webclient/DeliveryManager?pid=167822.

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The focus of this research was on the xylem sap of cucumber plants during arsenic stress. A better understanding of the uptake and translocation mechanisms within the plant is crucial for the assessment of arsenic impact on fruits and cereals of the human diet. The impact of four different arsenic species (As(III), As(V), DMA(V) and MMA(V)) on the xylem sap production and their respective concentration in the xylem was studied. Cucumbers behave similar under arsenic stress as other non-tolerant plant species regarding uptake and translocation; high inorganic uptake into the roots but higher tr
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34

Karamanlioglu, Mehlika. "Xylan-based Biodegradable And Wheat Gluten-based Antimicrobial Film Production." Master's thesis, METU, 2008. http://etd.lib.metu.edu.tr/upload/3/12609376/index.pdf.

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In the first part of the study, birchwood xylan-lignin film formation was studied. After film forming effect of lignin on pure birchwood xylan was demonstrated, the minimum lignin concentration necessary to form films was determined as 1.1% (lignin/xylan). So, it was determined that keeping about one percent lignin in xylan (w/w) was sufficient for film formation. Biodegradability of the lignin-birchwood xylan composite films was investigated enzymatically using 0.21 U / ml xylanase in an accelerated test. All the films containing lignin were hydrolyzed by xylanase showing biodegradability of
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Danzer, Shelley R., Steven W. Leavitt, Irina P. Panyushkina, Andreas Mergner, Evelyn Garcia, and Valeria Best-Svob. "Xylem Tracheid Development in Pinus Resinosa Seedlings in Controlled Environments." Tree-Ring Society, 2001. http://hdl.handle.net/10150/262534.

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Progressive tree-ring xylem cell size changes may reveal the influence of changing environment during the growing season. This study examines xylem tracheid cell growth in red pine (Pious resinosa Ait.) seedlings grown in cabinets under controlled environment, where single parameters (temperature, light, soil moisture and CO2) were varied step-wise in each chamber at ca. 30-day increments for ca. 6 months. Control and temperature treatments were replicated. Cross-sections (20 μm thick) sliced with a sliding microtome from each of four seedling stems from each cabinet were mounted on glass slid
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Cano, Delgado Ana Isabel. "Genetic and molecular analysis of xylem development in Arabidopsis thaliana." Thesis, University of East Anglia, 2000. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.365009.

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Plant cell walls play a central role in cell growth and morphogenesis. All plant cells have a primary wall. The formation of a secondary cell wall is restricted to particular cell types, such as the xylem cells, highly lignified cells that provide support and transport functions to the plant. The mechanisms regulating secondary cell wall biogenesis remain largely unknown. To identify genes involved in such mechanisms, a genetic screen for mutants with altered xylem development in the primary root of Arabidopsis thaliana has been conducted. Three different classes of mutants were identified. Th
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La, Grange Daniel Coenrad. "Genetic engineering of the yeast Saccharomyces cerevisiae to degrade xylan." Thesis, Stellenbosch : University of Stellenbosch, 1999. http://hdl.handle.net/10019.1/8490.

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Thesis (PhD)--University of Stellenbosch, 1999.<br>ENGLISH ABSTRACT: Hemicellulose, consisting mainly of xylan, ranks after cellulose, as the most abundant group of renewable polysaccharides in agricultural biomass. Xylan is a complex polymer consisting of a β D 1,4 linked xylopyranoside backbone, which may contain substituents. Enzymatic hydrolysis of xylan involves the action of a number of different hydrolytic enzymes. The yeast Saccharomyces cerevisiae has been used extensively in traditional food and beverage processes (baking, brewing and winemaking), as well as for the production of
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Leoo, Hampus. "Genetic regulation of xylem specification and differentiation in Arabidopsis thaliana." Thesis, Uppsala universitet, Institutionen för biologisk grundutbildning, 2021. http://urn.kb.se/resolve?urn=urn:nbn:se:uu:diva-445551.

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39

Jiang, Nan. "Characterization of TaXPol-1, a Xylan Synthase Complex from Wheat." Ohio University / OhioLINK, 2015. http://rave.ohiolink.edu/etdc/view?acc_num=ohiou1437153132.

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40

Ogata, Yoshiyuki. "STRUCTURAL ANALYSIS OF PERIODIC XYLEM GROWTH IN SELECTED TROPICAL TREES." Kyoto University, 2002. http://hdl.handle.net/2433/150363.

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Kyoto University (京都大学)<br>0048<br>新制・課程博士<br>博士(農学)<br>甲第9240号<br>農博第1219号<br>新制||農||836(附属図書館)<br>学位論文||H14||N3609(農学部図書室)<br>UT51-2002-B747<br>京都大学大学院農学研究科森林科学専攻<br>(主査)教授 藤田 稔, 教授 野渕 正, 教授 伊東 隆夫<br>学位規則第4条第1項該当
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41

Blease, Trevor Graham. "Laser multiphoton ionization spectroscopy and analysis of the xylene isomers." Thesis, University of Edinburgh, 1985. http://hdl.handle.net/1842/14139.

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Chafin, Raymond William II. "Torlon® and Silicalite Mixed Matrix Membranes for Xylene Isomer Purification." Diss., Georgia Institute of Technology, 2007. http://hdl.handle.net/1853/14562.

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Organic/inorganic materials have a high potential to enable major advances in membrane performance. It has previously been impossible to develop polymeric systems with adequate transport properties for xylene purification. Zeolite membranes have been created with the appropriate selectivities; however low productivity, low mechanical durability, and high capital costs have kept these materials from being utilized. So-called mixed matrix hybrid organic/inorganic membranes combine the mechanical durability and cost effectiveness of polymeric membranes with the enhanced performance of zeolitic
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43

Yang, Suk-Hwan. "Transcript profiling of differentiating xylem of loblolly pine (Pinus taeda L.)." Texas A&M University, 2004. http://hdl.handle.net/1969.1/1380.

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Wood formation (xylogenesis) is a critical developmental process for all woody land plants. As an initial step to understand the molecular basis for temporal and spatial regulation of xylogenesis and the effect of the expression of individual genes on physical and chemical properties of wood, microarray and realtime RTPCR analyses were performed to monitor gene expression during xylogenesis under various developmental and environmental conditions. The specific objectives established for this study were: Objective 1. Microarray analysis of genes preferentially expressed in differentiating xylem
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Aemprapa, Sirinun. "Toluene/xylene catabolic pathway of Pseudomonas putida strain O←2C←2." Thesis, Bangor University, 1996. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.321526.

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Mujib, Malip. "Influence of xylem blockage on rooting of cuttings of Triplochiton scleroxylon." Thesis, University of Nottingham, 1993. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.334827.

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Xie, He Fang. "Understanding the interaction between xylan-binding domains and their target ligands." Thesis, University of Newcastle Upon Tyne, 2000. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.324858.

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Ismond, Kathleen (Kaathleen Patricia) Carleton University Dissertation Biology. "Development of large diameter secondary Xylem Vessel Members; a new theory." Ottawa, 1996.

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48

Chen, Wei-Kuan, and 陳維冠. "Isothermal vapor-liquid quilibria of binary mixtures of N-methylformamide + xylene, sulfolane + xylene, toluene + xylene, benzene + nonane." Thesis, 2010. http://ndltd.ncl.edu.tw/handle/33835504986655354118.

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碩士<br>國立中興大學<br>化學工程學系所<br>98<br>Vapor-liquid equilibria at 333.15 K 343.15K and 353.15 K for seven binary mixtures of benzene + nonane, toluene + o-xylene, m-xylene + sulfolane, o-xylene + sulfolane, o-xylene + NMF, m-xylene + NMF and p-xylene + NMF have been obtained at pressures ranged from 0.01 to 101.3 kPa. The Wilson, NRTL and UNIQUAC activity coefficient models have been employed to correlate experimental data to find intermolecular parameters. The non-ideal behavior of the vapor phase has been considered by using the Peng-Robinson equation of state in calculating the vapor mole fract
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Chun-Ching, Wen, and 溫俊清. "Separation and purification of m-xylene from the xylene mixture." Thesis, 2007. http://ndltd.ncl.edu.tw/handle/14943134656004951563.

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博士<br>長庚大學<br>化工與材料工程研究所<br>95<br>The demand for m-xylene is rising worldwide, because this compound is consumed primarily for the production of isophthalic acid (IPA), which is used increasingly as a copolymer in the manufacture of polyethylene terephthalate (PET) plastic bottles. The mixed xylenes produced mainly consist of p-xylene (PX), m-xylene (MX), o-xylene (OX) and ethylbenzene (EB). Due to their similar molecular structures, these isomers have close boiling points (e.g., MX=139.12℃, PX=138.37℃, OX=144.41℃ and EB=136.19℃). It is extremely difficult to separate MX economically. This
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Tseng, Chun Hua, and 曾俊華. "Separation of p-xylene and m-xylene mixture by stripping crystallization." Thesis, 2013. http://ndltd.ncl.edu.tw/handle/07452594869727513369.

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碩士<br>長庚大學<br>化工與材料工程學系<br>101<br>Due to the close boiling points of p-xylene (PX) and m-xylene (MX), it is very difficult to separate them by distillation. Stripping crystallization (SC) is applied in this study to separate PX/MX mixtures. In principle, SC is operated at a triple-point condition, in which the liquid mixture is simultaneously vaporized and crystallized due to the three-phase equilibrium. Thus, SC is a distillative crystallization technology, which combines distillation and crystallization to produce pure crystals. By lowering temperature and reducing pressure during the operat
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