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Dissertations / Theses on the topic 'Arabinoxylany'

Author: Grafiati

Published: 4 June 2021

Last updated: 8 February 2022

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1

Koblasová, Dana. "Extrakce arabinoxylanů z pšeničných otrub." Master's thesis, Vysoké učení technické v Brně. Fakulta chemická, 2021. http://www.nusl.cz/ntk/nusl-449739.

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This diploma thesis is focused on the use of wheat bran as a raw material for extraction of arabinoxylans. Wheat bran is a waste product of mill processing of wheat into flour and is mainly used as a livestock feed. However, the amount of bran produced significantly exceeds its consumption as feed, which opens up space for research into their further use. Polysaccharides such as cellulose, hemicelluloses and lignin are mainly present in the bran. The most common type of hemicelluloses are arabinoxylans, which form the main structural component of wheat bran. Alkaline extraction disrupts hydrog

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2

Zhang, Ying. "Etude des relations entre structures et propriétés de films d'arabinoxylanes isolés de co-produits agricoles." Thesis, Reims, 2012. http://www.theses.fr/2012REIMS001/document.

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Plus de 40% des matériaux plastiques sont utilisés pour l’emballage. Les principaux polymères sur le marché de l’emballage alimentaire sont les polymères synthétiques d’origine fossile. Du fait de la raréfaction des ressources fossiles, la valorisation des polymères issus de matières premières renouvelables d’origine végétale représente une alternative à l’utilisation des polymères pétro-sourcés. Les hémicelluloses, avec la cellulose et les lignines, sont un composant majeur des ressources lignocellulosiques. Les hémicelluloses constituent des réseaux macromoléculaires denses et peu mobiles qu

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3

Piškulová, Lenka. "Stanovení beta-glukanů a pentosanů v surovinách pro výrobu piva a v pivu." Master's thesis, Vysoké učení technické v Brně. Fakulta chemická, 2017. http://www.nusl.cz/ntk/nusl-295695.

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The content of beta-glucans and arabinoxylans in barley grain, malt and wort was monitored. The varieties of barley were Pionier, Libuše, Manta, Tango, KWS Amadora, Kampa, KWS Irina, Francin, Odyssey, Overture, Vendela, Petrus, Laudis 550, Sunshine, Kangoo, Xanadu, Sebastian, Bojos and Malz. These varieties were grown on three different habitats (Uherský Ostroh, Věrovany and Vysoká u Příbramě). The content of beta-glucans and arabinoxylans was also analysed in five different types of beer. In brewing and malting industry the content of beta-glucans and arabinoxylans is mainly monitored because

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4

Bell, Ruth Mary. "Extraction of arabinoxylan from animal feed and investigations into its functionality as an ingredient in bread dough." Thesis, University of Manchester, 2015. https://www.research.manchester.ac.uk/portal/en/theses/extraction-of-arabinoxylan-from-animal-feed-and-investigations-into-its-functionality-as-an-ingredient-in-bread-dough(a234da96-130a-45ac-912f-cbafb7f69880).html.

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Arabinoxylans (AX’s) are the predominant non-starch polysaccharides found in the structural matrix of cell walls in wheat grains, being present in large quantities in wheat bran, accounting for up to 25% of its composition. Their physicochemical properties define their functionality which can be beneficial in cereal-based products such as bread, where their addition could enhance the gluten matrix responsible for the aerated structure and quality of bread. Bioethanol production has grown rapidly, however, to be economically viable, cereal-derived first generation biorefineries need to adopt th

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5

Edwards, Sandra L. "Investigation of ispaghula husk arabinoxylan structure." Thesis, London South Bank University, 2002. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.271763.

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6

Vinkx, Christine. "Structure and properties of arabinoxylans from rye /." Online version, 1994. http://bibpurl.oclc.org/web/33929.

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7

Chen, Chen. "Comparison of Corn and Rye Arabinoxylans for the Production of Bio-based Materials." Thesis, KTH, Skolan för kemi, bioteknologi och hälsa (CBH), 2020. http://urn.kb.se/resolve?urn=urn:nbn:se:kth:diva-282808.

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Enzymes and subcritical water can be used for the extraction of hemicelluloses from cereal by-products, making the processes eco-friendly. The polysaccharides extracted from cereal by-products can be used as matrices for development of materials for various applications. This includes bio-based materials such as films and hydrogels, which offer alternatives to existing materials produced from petrochemicals. The polymeric structure of cereal hemicelluloses contains functional groups which enable the modification of their structure by cross-linking, resulting in the formation of hydrogels. This

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8

Ni, Ying. "Arabinoglucuronoxylan and Arabinoxylan Adsorption onto Regenerated Cellulose Films." Thesis, Virginia Tech, 2013. http://hdl.handle.net/10919/78163.

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Cellulose and hemicelluloses have attracted increasing interest as renewable biopolymers because of their abundance. Furthermore, the recognition of biomass as a sustainable and renewable source of biofuels has driven research into the assembly and disassembly of polymers within plant cell walls. Cellulose thin films are useful in the study of interactions between cellulose and hemicelluloses, and quartz crystal microbalances with dissipation monitoring (QCM-D), surface plasmon resonance (SPR) and atomic force microscopy (AFM) are widely used to investigate polymer adsorption/desorption at liq

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9

Mikan-Venegas, Jose Fernando. "Arabinoxylan-degrading enzymes of the wheat pathogen Stagonospora nodorum." Thesis, University of Bath, 2001. https://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.342077.

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10

Aduba, Donald C. Jr. "Multi-platform arabinoxylan scaffolds as potential wound dressing materials." VCU Scholars Compass, 2015. http://scholarscompass.vcu.edu/etd/3955.

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Biopolymers are becoming more attractive as advanced wound dressings because of their naturally derived origin, abundance, low cost and high compatibility with the wound environment. Arabinoxylan (AX) is a class of polysaccharide polymers derived from cereal grains that are primarily used in food products and cosmetic additives. Its application as a wound dressing material has yet to be realized. In this two-pronged project, arabinoxylan ferulate (AXF) was fabricated into electrospun fibers and gel foams to be evaluated as platforms for wound dressing materials. In the first study, AXF was ele

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11

Nilsson, Mathias. "The dietary fibre complex of rye grain, with emphasis on arabinoxylan /." Uppsala : Swedish Univ. of Agricultural Sciences (Sveriges lantbruksuniv.), 1999. http://epsilon.slu.se/avh/1999/91-576-5494-8.pdf.

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12

Adams, Elizabeth L. "Developing molecular probes in arabinoxylan structural analysis using Atomic Force Microscopy." Thesis, University of East Anglia, 2001. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.393318.

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13

Zhang, Zhengxiao. "Extraction optimization, structure modification and immunomodulatory activity in vitro for arabinoxylans from cereals." Thesis, Manchester Metropolitan University, 2015. http://e-space.mmu.ac.uk/595927/.

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BACKGROUD: The industrial cereal brans produced as by-products of milling have been confirmed to be rich sources of arabinoxylans (AXs). The immunomodulatory properties of the extracted AXs from cereals have been reported, which potentially lead to corresponding health benefit in immune enhancement. However, this requires a clearer understanding of the relationship between the molecular structures of AXs and their immune-modulating activities (the structure-activity relationship). It is also considered essential to gain an understanding of the mechanisms of the immune-modulating properties of

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14

Stinson, Jesse. "A quantitative method to evaluate the effect of xylanases in baking." Thesis, Kansas State University, 2012. http://hdl.handle.net/2097/19752.

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Master of Science<br>Food Science Institute<br>Fadi Aramouni<br>β-(1,4)-endoxylanases, commonly referred to as xylanases, have become integral to the industrial breadmaking process. This enzyme is known to cause improvement in dough rheology, loaf volume, and crumb grain. Significant research has been conducted regarding the structure, function, and inhibition of xylanases, but there is currently no quick and reproducible method to evaluate their effect in baking. The goal of this research was to develop a quantitative method for this purpose and to determine why the effect of xylanases varies

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15

Senf, Deborah [Verfasser]. "Synthesis of Arabinoxylan Oligo- and Polysaccharides from the Plant Cell Wall / Deborah Senf." Berlin : Freie Universität Berlin, 2018. http://d-nb.info/1176707299/34.

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16

Mendis, Mihiri Marini. "Variability in Arabinoxylan, Xylanase Activity and Xylanase Inhibitor Levels in Hard Spring Wheat." Thesis, North Dakota State University, 2012. https://hdl.handle.net/10365/26806.

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Arabinoxylans (AX), xylanase, and xylanase inhibitors have an important role in many cereal food processing applications. The effect of growing location (L), genotype (G), and their interactions (L ×G) on AX, apparent xylanase and apparent xylanase inhibition activities of <italic>Triticum aestivum</italic> xylanase inhibitor (TAXI) and xylanases inhibiting protein (XIP) of wheat was studied using six hard red spring wheat and six hard white spring wheat genotypes. Total AX content was largely dependent on L×G. In bran, xylanase activity, 25% of the variability could be attributed

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17

Zhu, Yanping. "Analysing the mechanisms by which bacteria deconstruct mammalian N-glycans and plant-derived Arabinoxylans." Thesis, University of Newcastle Upon Tyne, 2010. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.531731.

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18

Xia, Jing. "Immunocytochemical localisation of arabinoxylans in the wheat (Triticum aestivum) caryopsis using a polyclonal antibody." Thesis, University of Cambridge, 2000. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.396093.

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19

Carvajal-Millan, Elizabeth. "Étude de gels d'arabinoxylanes de blé : relations structure, propriétés rhéologiques et libération contrôlée de protéines." École nationale supérieure agronomique (Montpellier), 2004. http://www.theses.fr/2004ENSA0015.

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Les arabinoxylanes (AX) de blé forment des hydrogels chimiques par réticulation enzymatique de l'acide férulique qu'ils portent. La formation et la stabilité des gels ont été suivies par rhéologie et quantification des liaisons covalentes formées (dimères d'acide férulique, di-AF). La présence dans les gels formés d'un trimère d'acide férulique (tri-AF) (4-0-8', 5'-5") a été mise en évidence. Les caractéristiques structurales des gels (masse molaire de la chaîne du polymère entre deux points de réticulation adjacents, densité de réticulation, taille de pore) ont été déterminées à partir de tes

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20

Deutschle, Alexander Lennart Verfasser], and Bodo [Akademischer Betreuer] [Saake. "Charakterisierung und Anwendung von kationischen Arabinoxylanen / Alexander Lennart Deutschle. Betreuer: Bodo Saake." Hamburg : Staats- und Universitätsbibliothek Hamburg, 2016. http://d-nb.info/1100689214/34.

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21

Deutschle, Alexander Lennart [Verfasser], and Bodo [Akademischer Betreuer] Saake. "Charakterisierung und Anwendung von kationischen Arabinoxylanen / Alexander Lennart Deutschle. Betreuer: Bodo Saake." Hamburg : Staats- und Universitätsbibliothek Hamburg, 2016. http://d-nb.info/1100689214/34.

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22

Mendis, Mihiri Marini. "Structurally Diverse Arabinoxylan Hydrolyzates: Their Activity as Immunomodulators and their Effect on Growth of Bacteroidetes." Diss., North Dakota State University, 2015. https://hdl.handle.net/10365/27413.

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Arabinoxylan (AX) is a plant polysaccharide which consists of a xylan backbone on which arabinose is substituted. Thirty structurally different wheat arabinoxylan hydrolyzates (AXH) were prepared by means of different combinations of xylanase (Cellvibrio japonicas xylanase (CJX) and Aspergillus niger xylanase (ANX)) and arabinofuranosidase (Bifidobacterium adolescentis arabinofuranosidase (BAF) and Clostridium thermocellum arabinofuranosidase (CAF)). The AXH were analyzed using GC-FID, GC-MS, 1H-NMR and SEC-MALS techniques. In general, the AXH had high proportion of unsubstituted xylose and le

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23

Anderson, Cassie Alexandra Palm. "Mechanical and Physical Properties of Biodegradable Wheat Bran, Maize Bran, and Dried Distillers Grain Arabinoxylan Films." Thesis, North Dakota State University, 2017. https://hdl.handle.net/10365/28492.

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Arabinoxylans are non-starch polysaccharides in the cell walls of cereal crops including maize (Zea mays L.) and wheat (Triticum aestivum L.). Arabinoxylans are produced when maize bran, dried distillers grain, and wheat bran are processed. The objective of this research was to extract arabinoxylan from cereal processing byproducts for use in biodegradable films. The arabinoxylan was extracted with dilute sodium hydroxide and purified using ?-amylase and protease. In addition to arabinoxylan, these films were made with either glycerol or sorbitol as a plasticizer at levels of 100, 250 or 500 g

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24

Großmann, Isabel Anna [Verfasser]. "Enzymatische Modifikation der Arabinoxylan- und Proteinfraktion von Roggenteigen zur Aufklärung und Optimierung der Strukturbildungseigenschaften / Isabel Anna Großmann." München : Verlag Dr. Hut, 2017. http://d-nb.info/1135597057/34.

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25

Schendel, Rachel Renae [Verfasser], and M. [Akademischer Betreuer] Bunzel. "Qualitative and quantitative screening of side-chain profiles of cereal grain arabinoxylans / Rachel Renae Schendel. Betreuer: M. Bunzel." Karlsruhe : KIT-Bibliothek, 2016. http://d-nb.info/111096966X/34.

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26

Raynal-Ioualalen, Rosanne. "Procédé de fractionnement des sons de blé. Extraction et étude des propriétés fonctionnelles des arabinoxylanes." Toulouse, INPT, 1996. http://www.theses.fr/1996INPT045G.

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L'extraction d'une poudre hémicellulosique de son de blé, nécessite l'élimination préalable de l'amidon. Le procédé d'élimination mis au point par un lavage aqueux avec recyclage des effluents générés, permet d'aboutir à des taux d'amidon résiduel dans le son de 1%. L'étude des conditions d'extraction basique de la fraction hémicellulosique en fonction de différents facteurs et de différents réacteurs, met en évidence la variation des poudres obtenues quant à leur composition chimique et leurs propriétés rhéologiques ainsi que la variation des rendements d'extraction. Après solubilisation, les

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27

Yoshida, Tomoki. "Chemical Properties of Corn Pericarp as a Renewable Resource." Kyoto University, 2014. http://hdl.handle.net/2433/188756.

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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18318号<br>農博第2043号<br>新制||農||1021(附属図書館)<br>学位論文||H26||N4825(農学部図書室)<br>31176<br>京都大学大学院農学研究科地域環境科学専攻<br>(主査)教授本田与一, 教授星野敏, 教授縄田栄治<br>学位規則第4条第1項該当

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28

Rosa, Natalia Nicole. "La structure de matrices céréalières riches en fibres alimentaires et antioxydants influence-t-elle leurs effets santé ?" Thesis, Montpellier 2, 2012. http://www.theses.fr/2012MON20181/document.

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Cette étude a pour objectif d'évaluer la relation entre la structure (au niveau physique et / ou moléculaire) de son de blé et de la couche à aleurone et leurs effets santé. En gardant la composition du son et de l'aleurone constante, leur structures ont été modifiés par des traitements mécaniques et / ou enzymatiques de façon à casser leur structure matricielle complexe et d'augmenter la bioaccessibilité des leurs fibres alimentaires et composés phénoliques. La capacité antioxydante des ces fractions a été évaluée par une méthode standard in vitro et par un modèle de digestion gastrique in vi

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29

Yacoubi, Nadia. "Water-soluble short-chain arabinoxylans produced by enzymatic treatment of wheat grain improve growth performance and intestinal health of broilers." Thesis, Nantes, 2016. http://www.theses.fr/2016NANT4063.

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Les préparations enzymatiques (MEP) qui dégradent les polysaccharides pariétaux sont utilisées pour améliorer les performances des poulets de chair. Leur mode d'action est complexe et encore peu expliqué. Dans ce travail de thèse, nous avons d'abord étudié l'effet de la MEP sur le grain de blé. Différentes fractions hydrosolubles produites avec ou sans MEP ont été isolées puis caractérisées. Ensuite elles ont été incorporées dans un régime à base de blé pour alimenter des poulets pendant 2 semaines. Leurs effets sur les performances animales et la santé intestinale, ainsi que sur la production

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30

Péroval, Claudine. "Influence de la composition, de la structure et du greffage de substances hydrophobes sur les propriétés fonctionnelles de films à base d'arabinoxylanes." Dijon, 2002. http://www.theses.fr/2002DIJOS039.

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31

DERUILLY, PINEL GAUD. "Etude des relations entre la structure et les proprietes physicochimiques des arabinoxylanes hydro-solubles de l'albumen de ble." Massy, ENSIA, 2001. http://www.theses.fr/2001EIAA0111.

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Des arabinoxylanes hydro-solubles d'albumen de ble sont purifies, deesterifies et fractionnes par precipitations ethanoliques et chromatographie d'exclusion sterique en 48 fractions. La caracterisation physicochimique, effectuee par hpsec-malls-viscotek montre que chacune de ces fractions est homogene en masse molaire. Les parametres conformationnels calcules indiquent que les arabinoxylanes adoptent une conformation flexible, de type pelote statistique en solution. L'etude structurale, realisee par rmn 1h, met en evidence des structures differentes pour chacune de ces populations. Les paramet

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32

Ragaee, Sanaa. "Physicochemical and structural characteristics of water-extractable arabinoxylan from rye lines varying in extract viscosity and its relationship to end-use characteristics." Thesis, National Library of Canada = Bibliothèque nationale du Canada, 2001. http://www.collectionscanada.ca/obj/s4/f2/dsk3/ftp05/NQ63915.pdf.

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33

Fadel, Abdulmannan Mohamad. "Immunomodulatory properties of water soluble arabinoxylans from extruded rice bran and wheat pentosan in an in vitro model of human monocytes and macrophages." Thesis, Manchester Metropolitan University, 2017. http://e-space.mmu.ac.uk/618886/.

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Arabinoxylans (AXs) are major components of non-starch polysaccharides (NSPs). Recently, AXs have attracted a great deal of attention, because of their possible antitumor and immunomodulation activities. These activities have been suggested to be related to the content of low molecular weight (Mw) AXs, in particular those with a Mw below 32 kDa. Rice bran and wheat pentosan are rich sources of AXs. However, extraction of AXs is difficult and often gives low yield. Various methods have been used to increase the extraction yield of AXs with varying degrees of success, such as alkaline hydrolysis

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34

Ying, Ruifeng. "Rôle des arabinoxylanes et des B-glucanes dans l'assemblage et les propriétés des parois de l'albumen des grains de céréales." Nantes, 2012. http://www.theses.fr/2012NANT2001.

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Les arabinoxylanes (AX) et les (1→3)(1→4)-ß-D-glucanes (BG) sont les principaux composants des parois cellulaires de l'albumen amylacé du grain de blé. Des variations spatiales et temporelles de la structure de ces polymères et de leur organisation dans la paroi sont observées. Toutefois le rôle de ces différents polysaccharides et l’impact de ces variations sur l' assemblage pariétal et les propriétés des parois sont mal compris. L’objectif de ce travail a été d’explorer les propriétés d’hydratation, de porosité et mécaniques de films d’AX et de BG mimant l’organisation et la diversité struct

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35

De, la Mare Marion. "Caractérisation des a-L-arabinofuranosidases de la famille GH62 chez le champignon filamenteux Talaromyces versatilis (basionyme Penicillium funiculosum) et étude de leur impact, en association avec des xylanases, sur la dégradation d'arabinoxylane." Thesis, Toulouse, INSA, 2014. http://www.theses.fr/2014ISAT0030.

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La société Adisseo produit un cocktail d’enzymes hydrolytiques appelé Rovabio® Excel sécrété par un champignon filamenteux Talaromyces versatilis. Ce cocktail est utilisé comme additif alimentaire pour augmenter la digestibilité de complexes polysaccharidiques en nutrition animale et ainsi augmenter la valeur nutritionnelle des matières premières agricoles. Une récente étude protéomique de ce champignon (Guais et al., 2008) a révélé la présence d’un grand nombre d’arabinofuranosidases (ABFs) appartenant à différentes familles de glycosides hydrolases : 5 ABFs de la famille GH54, 3 ABFs de la f

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Rudjito, Reskandi Chastelia. "Pilot scale process for polysaccharide extraction and fractionation from cereal by-products." Thesis, KTH, Skolan för bioteknologi (BIO), 2017. http://urn.kb.se/resolve?urn=urn:nbn:se:kth:diva-215022.

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Döring, Clemens [Verfasser], Thomas [Akademischer Betreuer] Becker, Eckhard [Gutachter] Flöter, and Thomas [Gutachter] Becker. "Interrelation between arabinoxylan and protein during network formation over enzymatic modification in rye based food systems / Clemens Döring ; Gutachter: Eckhard Flöter, Thomas Becker ; Betreuer: Thomas Becker." München : Universitätsbibliothek der TU München, 2020. http://d-nb.info/1217783725/34.

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38

Alves, Luana de Fátima. "Criação de uma enzima multifuncional feruloil esterase/acetil-xilano esterase por desenho racional." Universidade de São Paulo, 2016. http://www.teses.usp.br/teses/disponiveis/17/17131/tde-21072016-153003/.

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A parede celular das plantas inclui componentes polissacarídeos complexos, e a sacarificação destes polímeros necessita da ação de conjuntos de enzimas que atuem em sinergia. Enzimas podem formar complexos multi-enzimáticos que possuem mais de uma atividade catalítica derivada de domínios distintos de uma mesma cadeia polipeptídica. O objetivo deste trabalho foi construir uma enzima bifuncional com os domínios catalíticos: acetilxilano esterase (Axe) e feruloil esterase (Fae) para desconstrução de material lignocelulósico de cana-de-açúcar. Para isso, dois diferentes domínios catalíticos: acet

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39

Ordaz, Ortiz José Juan. "Dégradation enzymatique des parois du grain de blé (Triticum aestivum) par une endoxylanase de Trichoderma viride : Application à l'étude de la structure des arabinoxylanes et de leur variabilité." Nantes, 2005. http://www.theses.fr/2005NANT2031.

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La dégradation enzymatique des parois du grain de blé (Triticum aestivum) et son application à l'étude de la variabilité structurale des arabinoxylanes (AX) de l'albumen amylacé a été entreprise pour mieux comprendre les propriétés des parois et maîtriser les mécanismes de biosynthèse qui les modulent. Les produits de dégradation des AX par une endoxylanase de Trichoderma viride ont été isolés et caractérisés par RMN du proton, puis utilisés pour produire des anticorps monoclonaux dirigés contre les AX. Les règles de leur fragmentation en spectrométrie de masse (ESI-Q-TOF) ont été établies. La

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40

Roche, Nathalie. "Production d'alpha-L-arabinofuranosidase par culture en milieu solide sur pulpe de betterave : étude du métabolisme de Trichoderma reesei et Thermoascus aurantiacus lors de cette production." Compiègne, 1994. http://www.theses.fr/1994COMPD710.

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Notre travail à porte sur l'étude de la production d'alpha-l-arabinofuranosidase par culture en milieu solide sur pulpe de betterave. Nous avons tout d'abord étudié l'influence des conditions de culture et d'inoculation sur la production d'alpha-l-arabinofuranosidase thermostable par thermoascus aurantiacus, puis le métabolisme de thermoascus aurantiacus et trichoderma reesei lors de la production de cette enzyme. Lors de ces cultures, les principaux polysaccharides de la pulpe de betterave, c'est-a-dire arabinanes, cellulose et pectines sont dégradés par thermoascus aurantiacus, dans l'ordre

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Crivellari, Augusto Cesar. "Caracterização estrutural das hemiceluloses de paredes celulares de cana-de-açúcar." Universidade de São Paulo, 2012. http://www.teses.usp.br/teses/disponiveis/41/41132/tde-10102012-084959/.

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O Brasil, segundo maior produtor mundial de biocombustíveis, produz etanol a partir da extração e fermentação de sacarose de colmos de cana-de-açúcar. A utilização da energia presente nas ligações químicas entre os carboidratos da parede celular (celulose, hemiceluloses e pectina), das biomassas de folha e bagaço (hoje ambos considerados resíduos de produção), é uma possibilidade para o incremento, de cerca de 3 vezes o valor atual, na produção de etanol. O entendimento da estrutura química dos polissacarídeos da parede celular de cana-de-açúcar é imprescindível para que esta tecnologia seja d

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Wallace, Janielle L. "Potential of exogenous enzymes in low fish meal diets to improve nutrient digestibility and sustainability of farmed tilapia in Thailand." Thesis, University of Stirling, 2015. http://hdl.handle.net/1893/24004.

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Intensive and semi-intensive aquaculture systems are dependent on nutrient input either in the form of supplemental or complete feeds. Most complete diets still include high fish meal (FM) levels (≥10%). However, as the industry attempts to reduce its reliance on FM, feeds must now be formulated with much lower levels especially for omnivorous species such as tilapia. By 2015, mean FM inclusion in tilapia diets was projected to fall below 3% and be further reduced to 1% by 2020. In the global context of competition for crops, finding suitable plant-based replacers for FM and meeting the increa

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Brillouet, Jean-Marc. "Purification et étude des propriétés d'endo-(1->4)-[bêta]-D-xylanases de Polyporus tulipiferae et de l'[alpha]-L-Arabinofuranosidase de Dichomitus squalens : application à l'analyse structurale d'un hétéroxylane ramifié du péricarpe du grain de blé : comparaison avec les méthodes chimiques et physique (RMN)." Grenoble 1, 1986. http://www.theses.fr/1986GRE10054.

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Deux endo-xylanases purifiees a partir d'une preparation commerciale (driselase) issue du basidiomycete polyporus tulipiferae. Alpha -l-furanosidase purifiee a partir d'un surnageant de culture du basidiomycete dichomitus squalens, cultive sur arabinoxylane de paille de ble. Determination des ph et temperatures optimaux pour l'activite de ces enzymes. Etude de leur mode d'action sur arabinoglucuronoxylane de glume d'avoine et sur 4-o-methyle-glucuronoxylane de meleze (analyse des produits d'hydrolyse). Action des enzymes sur un heteroxylane purifie a partir de son de ble industriel peprmet de

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Lempereur, Isabelle. "Bases physico-chimiques du fractionnement et de la fragmentation des grains de blé dur (Triticum durum Desf. ) par voie sèche." Montpellier 2, 1997. http://www.theses.fr/1997MON20093.

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La valeur semouliere des bles durs (triticum durum desf. ) reste souvent definie par connaissance empirique. La comprehension des bases de la fragmentation et du fractionnement du grain, et la maitrise des effets des facteurs agronomiques et genotypiques sur ces aspects etaient les objectifs de ce travail. Les facteurs intrinseques de la valeur semouliere mis en evidence sont : le rapport albumen sur enveloppes, la resistance mecanique de l'albumen amylace et l'aptitude a dissocier les parties peripheriques du grain de l'albumen amylace. La valeur semouliere est influencee par le genotype, par

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Orságová, Simona. "Obsah beta-glukanů a pentosanů v odrůdách ječmene." Master's thesis, 2015. http://www.nusl.cz/ntk/nusl-362503.

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The aim of this thesis was to determine the variability of the quantity of non-starch polysaccharides in grain malting spring barley (Bojos, Kangoo, Laudis 550, Malz, Sebastian Xanadu), winter barley (Wintmalt) non- malting varieties of winter barley (Jup, Lester, Nero), spring barley (Azita, Tocada, Wiebke) and food suitable varieties spring barley (Cesar AF, AF Lucius). Samples of barley grains were detected on the quantity of pentosans and beta-glucans. Pentosans were determined by the Douglas method. Beta-glucan content in grain by FIA (Flow Injection Analysis). The influence factors on th

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Asawaprecha, Sunida. "Wheat flour arabinoxylans in soft wheat end-use quality." Thesis, 2004. http://hdl.handle.net/1957/27124.

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Little is known about the effects of arabinoxylans (AX) on noodle quality. The aim of this study was to observe interrelationships between wheat flour AX, SRC tests, and noodle quality attributes, and to investigate the use of SRCs to predict cookie diameter. Cookie diameter is the most common index of overall soft wheat quality used in practice. Duplicate samples of 63 soft white wheat (Triticum aestivum) varieties and breeding lines grown at Corvallis in 2002 were selected to study the relationships between flour and noodle characteristics. Kernel hardness was positively correlated with star

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Izydorczyk, Marta S. "Studies on structure and physicochemical properties of wheat endosperm arabinoxylans." 1993. http://hdl.handle.net/1993/29418.

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Shi, Yi-Yo, and 施沂佑. "Alkaline Extraction of Arabinoxylans from Wheat Bran and Their Physicochemical Characteristics." Thesis, 2003. http://ndltd.ncl.edu.tw/handle/05291878242640343824.

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碩士<br>國立臺灣大學<br>農業化學研究所<br>91<br>In this study, the arabinoxylan from water-unextractable cell wall material (WUS) of wheat bran were extracted by using saturated barium hydroxide solution, which was saturated at 25, 50 or 70℃, and contained 0.26 M sodium borohydride, or sodium hydroxide solution（0.3 M, 0.5 M and 0.7 M）. WUS contained 38.6% from industrial wheat bran should be pretreated and 38.6% WUS was obtained. The NaOH solution had better extraction yield of AX than Ba(OH)2 solution. The yield of AX was 47.5% and 27.1% when it was extracted with 0.7 M NaOH and saturated (at 25℃) Ba(OH)2

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Weng, Verónica Lee. "Corn arabinoxylan biopolymers as materials for biodegradable films for food packaging." Master's thesis, 2020. http://hdl.handle.net/10362/109081.

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Corn fiber is a by-product of the starch industry, currently used as animal feed. It contains in its composition arabinoxylan, with film-forming properties, thus this material has a great interest in being valorized. Arabinoxylan was extracted with an alkaline solution and centrifuged. The resulting extract was purified with an ultrafiltration membrane hollow-fiber unit, in a continuous diafiltration process, at two different Reynolds number at the feed side (129 and 267), under controlled temperature and permeate flux conditions. At the final diavolume of 10, rejections were higher at Reynol

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Fleury, Michelle Dawn. "Arabinoxylan in western Canadian barley and its effects on broiler chick performance." 1994. http://hdl.handle.net/1993/7351.

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A series of studies were performed to determine the effects of arabinoxylan (AX) in western Canadian barley on the performance and digesta viscosity of young broiler chickens. Breeder lines and cultivars from the 1991 Western Canadian Barley Cooperative Program were surveyed, using a modification of the orcinol technique, to determine the range in total, water-soluble and acid-soluble AX concentrations expressed by modern genetic materials. The six-rowed barley type contained greater total, acid-soluble and water-soluble AX than hulless or two-rowed cultivars (P<-.01). The AX in hulless bar

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