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Dissertations / Theses on the topic 'Fibrolytic'

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Published: 4 June 2021

Last updated: 5 February 2022

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1

Goosen, Liezel. "The effect of an exogenous fibrolytic enzyme on forage digestibility parameters." Thesis, Stellenbosch : Stellenbosch University, 2004. http://hdl.handle.net/10019.1/50141.

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Thesis (MScAgric) -- Stellenbosch University, 2004.<br>ENGLISH ABSTRACT: The ruminant has the ability to utilize forages more efficiently than any other production animal. The utilization of forage fibre is an important aspect of ruminant production systems, as this is the main source of energy available to the animal. The availability of high-fibre forage nutrients is, however, restricted by cell wall degradability, and since low quality forages contribute a great deal to ruminant production systems worldwide, the improvement of this degradation process is of major economic importance.

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2

Botha, Corne J. "The use of fibrolytic enzymes in maize-soya based broiler diets." Thesis, Stellenbosch : University of Stellenbosch, 2011. http://hdl.handle.net/10019.1/6456.

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Thesis (MScAgric (Animal Sciences))--University of Stellenbosch, 2011.<br>Includes bibliography.<br>ENGLISH ABSTRACT: A growth and digestibility trial was conducted comparing the effect of an experimental enzyme at three different inclusions. A negative control containing no enzyme additions and a positive control containing a proven commercial enzyme were compared in a maize-soybean diet noting the performance of broilers and the digestibility of the grower feed. The commercial enzyme was a granular product with a xylanase activity of 38114.29 nkat/g and the second enzyme (ABO374) w

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3

Gwayumba, Washington. "Lactic acid bacterial inoculants and fibrolytic enzymes in forage preservation and degradability." Thesis, National Library of Canada = Bibliothèque nationale du Canada, 1997. http://www.collectionscanada.ca/obj/s4/f2/dsk3/ftp05/nq23993.pdf.

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4

Ordaz, Salvador. "Fibrolytic Enzymes And Silage Inoculants To Improve The Nutritive Value Of Silage." ScholarWorks @ UVM, 2017. http://scholarworks.uvm.edu/graddis/815.

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Ensiling is one of the most common processes used as a conservation method for forages on farms and plays an important role in farm economics. Therefore, with the aim to improve the conservation and the nutritive value of silage, the utilization of silage additives such as fibrolytic enzymes (FE) and lactic acid bacteria (LAB) inoculants has been a common on-farm practice. FE are enzymes capable of breaking down complex polysaccharides such as cellulose and hemicellulose. The latter results in an increased substrate availability for epiphytic and inoculated LAB during silage fermentation, thus

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5

Van, de Vyver Wilhelmus Francois Joubert. "Fibrolytic enzymes in ruminant nutrition and their effect on forage cell wall integrity." Thesis, Stellenbosch : Stellenbosch University, 2011. http://hdl.handle.net/10019.1/6884.

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Thesis (PhD(Agric))--Stellenbosch University, 2011.<br>ENGLISH ABSTRACT: Exogenous fibrolytic enzymes (EFE) as additives in ruminant feeds are being researched worldwide. Promising effects on dry matter intake (DMI), digestibility and production in especially dairy cows, but also feedlot steers and even sheep have been observed. However, lack of or negative effects are also reported and the need arises for clarity on the mode-of-action of EFE. Forages are characterised as being highly heterogenic and contain varying concentrations of fibre. The fibre, in turn, varies greatly in digestibil

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6

Useni, Bilungi Alain. "Effect of exogenous fibrolytic enzymes on fibre and protein digestion in ruminant animals." Thesis, Stellenbosch : University of Stellenbosch, 2011. http://hdl.handle.net/10019.1/6744.

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Thesis (MScAgric (Animal Sciences))--University of Stellenbosch, 2011.<br>Includes bibliography.<br>ENGLISH ABSTRACT: Forages are the main feed components in ruminant production systems for the reason that they are often the major source of energy available to the animal. However, only 10 to 35% of energy intake is available as net energy because the digestion of plant cell walls is not complete. This can significantly affect livestock performance and profits in production systems that use forages as a major source of nutrients of the diet. As a result of low and variable nutritive values

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7

Baloyi, Thembekile Feonah. "Effects of exogenous fibrolytic enzymes on in vitro fermentation kinetics of forage and mixed." Thesis, Stellenbosch : Stellenbosch University, 2008. http://hdl.handle.net/10019.1/19895.

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Thesis (MScAgric)--Stellenbosch University, 2008.<br>ENGLISH ABSTRACT: Two in vitro experiments were conducted to evaluate the effect of exogenous fibrolytic enzyme application on dry matter (DM) and neutral detergent fibre (NDF) degradation and gas production (GP) of mature forages and forage-concentrate mixtures. The forages used in the first experiment were lucerne hay (LH), oat hay (OH) and wheat straw (WS). The same forages were used in the second experiment, but they were mixed with a concentrate feed to make three mixtures consisting of 80% (HC), 50% (MC) or 20% (LC) concentrate. The ex

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8

Flores, Pérez Cristóbal. "Improving performance of sheep using fibrolytic enzymes in dairy ewes and malate in fattening lambs." Doctoral thesis, Universitat Autònoma de Barcelona, 2004. http://hdl.handle.net/10803/5651.

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9

Dean, Dervin Bartolo. "Effect of fibrolytic enzymes on the nutritive value of tropical grasses and dairy cattle performance." [Gainesville, Fla.] : University of Florida, 2005. http://purl.fcla.edu/fcla/etd/UFE0013043.

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10

Pellegrini, Suzanne Ishaq. "A Comparative Analysis Of The Moose Rumen Microbiota And The Pursuit Of Improving Fibrolytic Systems." ScholarWorks @ UVM, 2015. http://scholarworks.uvm.edu/graddis/365.

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The goal of the work presented herein was to further our understanding of the rumen microbiota and microbiome of wild moose, and to use that understanding to improve other processes. The moose has adapted to eating a diet of woody browse, which is very high in fiber, but low in digestibility due to the complexity of the plant polysaccharides, and the presence of tannins, lignin, and other plant-secondary compounds. Therefore, it was hypothesized that the moose would host novel microorganisms that would be capable of a wide variety of enzymatic functions, such as improved fiber breakdown, metab

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11

Krueger, Nathan Alfred. "Effect of fibrolytic enzymes on the nutritive value of tropical forages and performance of beef steers." [Gainesville, Fla.] : University of Florida, 2006. http://purl.fcla.edu/fcla/etd/UFE0013798.

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12

Baza, García Luis Angel. "In Vitro Assessment of Fecal Inocula From Horses Fed on High-Fiber Diets With Fibrolytic Enzymes Addition on Gas, Methane and Carbon Dioxide Productions As Indicators of Hindgut Activity." Tesis de Licenciatura, Universidad Autónoma del Estado de México, 2016. http://hdl.handle.net/20.500.11799/65147.

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This study was aimed to assess the effect of fecal inocula from horses fed on concentrate (restricted amount daily) and oat straw (ad libitum) supplemented with fibrolytic enzymes on in vitro hindgut activity. Cellulase (CE), xylanase (XY) and CE+XY (1:1 v/v; CX) were tested at three levels (μL/g DM): 0, 1 and 3, in addition to control without enzyme addition (EP0). Fecal inocula were collected from 16 Quarter Horse mares supplemented with enzyme at 0 (FCOwithout enzyme), or fed 10 ml enzyme/mare/day of CE (FCE), XY (FXY) or CE+XY (1:1 v/v; FCX) for 15 days. The fecal content mixed with

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13

Freiria, Lucien Bissi da. "Parâmetros cinéticos da fermentação ruminal “in vitro” de dietas com enzimas exógenas." Universidade Federal de Mato Grosso, 2015. http://ri.ufmt.br/handle/1/223.

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14

Bouattour, M. Amine. "Effects of feeding different vegetal fat sources to increase conjugated linoleic acid in milk of small ruminants and interaction with fibrolytic enzymes." Doctoral thesis, Universitat Autònoma de Barcelona, 2007. http://hdl.handle.net/10803/5681.

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El objetivo principal de la presente tesis doctoral fue estudiar la posibilidad de mejorar la calidad nutritiva de la leche de oveja y de cabra, y en particular la concentración de ácido linoleico conjugado (CLA) mediante la incorporación de diferentes fuentes de lípidos vegetales a la ración.<br/>El primer capitulo fue realizado para investigar los efectos de la suplementación con Semillas Enteras de Lino (WLS) o de Aceite de Lino (LSO) sobre la producción y composición de leche, así como el perfil de ácidos grasos (AG) de leche y queso. Las concentraciones de AG de cadena media y de AG satu

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15

Romero, Gomez Juan Jose. "Exogenous fibrolytic enzyme or anhydrous ammonia effects on the nutritive value, intake, and digestion kinetics of bermudagrass and the growth of beef cattle." [Gainesville, Fla.] : University of Florida, 2009. http://purl.fcla.edu/fcla/etd/UFE0041306.

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16

Monteiro, Ludmila de Souza. "The use of fibrolytic enzymes on the performance, metabolism and feeding behavior of feedlot cattle fed diets which differ in terms of level and source of roughage." Universidade de São Paulo, 2018. http://www.teses.usp.br/teses/disponiveis/11/11139/tde-22032019-160838/.

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Given the barriers in the degradability of the fibrous fraction of feed, two experiments were conducted with the objective of evaluating the use of fibrolytic enzymes (EFE) with xylanase and cellulase activities in feedlot diets for beef cattle, originating this dissertation. In the first experiment, the objective of the study was to determine the effect of the fibrolytic enzyme in the diet of finishing feedlot Nellore bulls with diets containing two sources and two levels of roughage inclusion. Two hundred and sixty-four Nellore bulls (371 ± 18.7 kg) were distributed in 48 pens by initial BW

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17

Galetti, Gino Renzo. "Effect of exogenous fibrolytic enzyme supplementation on rumen fermentation in sacco NDF disappearance and total tract nutrient digestibility of feedlot steers fed hominy chop - maize based diets." Diss., University of Pretoria, 2020. http://hdl.handle.net/2263/77816.

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The focus of this study was to determine the effect of exogenous enzyme supplementation on rumen fermentation parameters, since a healthy or improved rumen environment favors more efficient growth performance and contributes to higher total tract digestibility, the focus being on the South African feedlot industry. The effects on total tract digestibility, in sacco digestion and dry matter disappearance of Neutral detergent fibre (NDF) as well as rumen fermentation patterns were studied using three differing levels of formulated fibre. The primary energy component were different combinations o

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18

Yang, Yang. "Effects of Feeding Hulless Barley (Hordeum vulgare L.) and Supplementing a Fibrolytic Enzyme on Production Performance, Nutrient Digestibility, and Milk Fatty Acid Composition of Lactating Dairy Cows." Diss., Virginia Tech, 2018. http://hdl.handle.net/10919/85794.

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The overall objective of this study was to evaluate the effects of feeding hulless barley and supplementing a xylanase enzyme on production performance and nutrient utilization of lactating dairy cows. In study 1, we evaluated production performance, milk fatty acid composition, and nutrient digestibility in high-producing dairy cows consuming diets containing corn and hulless barley in different proportions as the grain source. We hypothesized that a plausible reduction in production performance would be explained by an altered rumen function, which would be reflected in a reduction of the pr

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19

Carvalho, Lara Rodrigues de Queiroz. "Adição de bactérias homofermentativas e celulase na ensilagem de cana-de-açucar." Universidade Federal de Goiás, 2017. http://repositorio.bc.ufg.br/tede/handle/tede/8040.

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20

Peters, Anja [Verfasser], Sven [Akademischer Betreuer] Dänicke, Jürgen [Akademischer Betreuer] Hummel, and Holger [Akademischer Betreuer] Kluth. "Effects of an exogenous fibrolytic enzyme additive on ruminal fermentation, nutrient digestion, performance and health status in early and mid-lactation dairy cows : [kumulative Dissertation] / Anja Peters ; Sven Dänicke, Jürgen Hummel, Holger Kluth." Halle, 2016. http://d-nb.info/1123150311/34.

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21

Sakita, Gabriel Zanuto. "Produção de gases, fermentação ruminal e desempenho de ovinos suplementados com enzimas fibrolíticas." Universidade de São Paulo, 2018. http://www.teses.usp.br/teses/disponiveis/64/64133/tde-07032019-111324/.

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A preocupação com a segurança alimentar e o aquecimento global pressiona a cadeia de produção de ruminantes a buscar alternativas para incremento na produtividade e redução nas emissões dos gases de efeito estufa, uma vez que essa atividade é responsável por grande parte das emissões de metano (CH4) entérico. O desenvolvimento de produtos enzimáticos para uso na nutrição de ruminantes torna-se de grande valia para contribuir com a demanda alimentar e reduzir os impactos ambientais. O objetivo do presente estudo foi avaliar o uso de um extrato de enzimas fibrolíticas (EEF), composto por endoglu

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22

Carvalho, Victor Valério de. "Estratégias de suplementação para novilhas de corte em pastejo no período da seca." Universidade Federal de Viçosa, 2014. http://locus.ufv.br/handle/123456789/5808.

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Made available in DSpace on 2015-03-26T13:55:23Z (GMT). No. of bitstreams: 1 texto completo.pdf: 436321 bytes, checksum: 323b66a4d995a23c4570a850ccba61cb (MD5) Previous issue date: 2014-02-27<br>Conselho Nacional de Desenvolvimento Científico e Tecnológico<br>The first experiment aimed to evaluate performance and nutritional characteristics of the effect of replacing soybean meal by wheat bran and urea in multiple supplements for beef heifers grazing Brachiaria decumbens Stapf. during the dry season. Forty-five Nelore beef heifers (Age: ±26 months; body weight = 410±2,9) were randomly assign

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23

Robert, Sacha. "Caractérisation des signaux de danger et de la signalisation cellulaire dans le développement de la fibrose hépatique." Thesis, Rennes 1, 2016. http://www.theses.fr/2016REN1B016/document.

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La voie de signalisation de l’inflammasome est impliquée dans plusieurs pathologies inflammatoires dont la fibrose pulmonaire et plus récemment, elle a été mise en lumière dans le développement de la fibrose hépatique. L’activation de ce complexe permet la maturation et la libération de la cytokine pro-inflammatoire IL-1β par les cellules immunitaires telles les macrophages, après reconnaissance de motifs bactériens ou de signaux de danger. L’objectif de cette thèse était de montrer les mécanismes moléculaires et cellulaires par lesquelles l’inflammasome est impliqué dans la fibrose hépatique.

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24

Fon, Fabian Nde. "Fibrolytic enzyme activity of herbivore microbial ecosystems." Thesis, 2006. http://hdl.handle.net/10413/4078.

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The aim of this study was to determine firstly if there exist variations in fibrolysis among herbivore microbial ecosystems and secondly, the effect on fibre hydrolysis of compositing the most active systems with ruminal microbial ecosystem harvested from a Jersey cow. A literature review pointed to the complexity of carbohydrate (fibre) and how the physical and chemical nature of the forage carbohydrate can present barriers that hinder digestion in the rumen, especially its association with hemicelluloses, pectin, lignin and tannins. Fresh rumen fluid was collected from fistulated herbivores

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25

Wu, Meng-Shan, and 吳孟珊. "Construction and characterization of bifunctional fibrolytic enzymes." Thesis, 2012. http://ndltd.ncl.edu.tw/handle/40179850858592933442.

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碩士<br>國立臺灣大學<br>動物科學技術學研究所<br>100<br>Plant cell walls are comprised of cellulose, hemicellulose and lignin. This complex structure acts as a barrier for degradation by fibrolytic enzymes. Therefore, bifunctional or multifunctional fibrolytic enzymes are more efficient in hydrolysis of plant cell walls and more cost and time saving in enzyme production as compared to the single functional enzymes. In this study, two chimeric fibrolytic enzymes were constructed by fusion of cbhYW23-2, a β-glucanase gene from ruminal fungus Piromyces rhizinflatus, and xynCDBFV, a xylanase gene from Neocallimast

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26

Tseng, Cheng-Cheng, and 曾丞正. "Identification and estimation of fibrolytic ability of the rumen fungi." Thesis, 2012. http://ndltd.ncl.edu.tw/handle/66750716494099660188.

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27

Fon, Fabian Nde. "The fibrolytic potential of domestic and wild herbivores microbial ecosystems on maize stover." Thesis, 2012. http://hdl.handle.net/10413/8316.

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The growing demand for meat worldwide by the increasing human population (6.8 billion) calls for an increase in livestock production as well as attention to environmental sustainability. Production increases are critical especially in Africa with the highest annual population growth rate (2.5%), where most communities rely on livestock for protein supply. Attempts by intensive livestock farming to optimize production are limited by fibrous quality feeds (roughages) and their unavailability in both developed and developing countries. The overall objective of this study was to scan both domestic

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28

Thomas, Martha 1980. "Application of Fibrolytic Enzymes and Bacterial Inoculants to Sorghum Silage and Small-Grain Hay." Thesis, 2013. http://hdl.handle.net/1969.1/149230.

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Fibrolytic enzymes and microbial inoculants have potential to improve the value of feedstuff and feedstock. An experiment was conducted to determine the nutritive value, ensiling characteristics, and in situ disappearance kinetics of sorghum (Sorghum bicolor L.) silages pretreated with fibrolytic enzyme (xylanase plus cellulase: XC) or microbial [Promote ASB (Lactobacillus buchneri and L. plantarum); PRO] inoculants. The greatest yield was for cultivar PS 747 and the least for MMR 381/73 (MMR). Neutral detergent fiber (NDF) concentration was least for XC treated silage, and acid detergent fi

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29

Yang, Shuen-Yao, and 楊舜堯. "Feasibility Evaluation of Methane Production from Rumen Fibrolytic Bacteria and Methanogen Coculturing on Agricultural Wastes." Thesis, 2015. http://ndltd.ncl.edu.tw/handle/16508900250492860200.

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碩士<br>國立臺灣大學<br>動物科學技術學研究所<br>103<br>Climate change, energy crisis and fossil fuel depletion are driving the development of renewable energy. Methane is one of the potential fuel and it has the highest hydrogen to carbon ratio in all hydrocarbons, is a relatively clean fuel and more eco-friendly than oil. Methane is produced by methanogens in the anaerobic environment such as, swamps, land fills and the intestinal tracts of animals. Rumen has a great ability to digest grass by its abundant microorganisms. It also produce considerable methane during fermenting. The aim of the present study is t

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30

Bowman, Gavin Randy. "Digestion, ruminal pH, salivation, and feeding behavior of lactating dairy cows fed a diet supplemented with fibrolytic enzymes." Thesis, 2001. http://hdl.handle.net/2429/12019.

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The objectives were to determine the effects of supplementing different components of the diet with enzymes on dry matter intake, ruminal fermentation, total tract digestion, milk production, and effective fiber. Eight multiparous and four primiparous lactating Holstein cows were used in a replicated 4 x 4 Latin square design to investigate the effects of supplementing a diet with a fibrolytic enzyme product containing mainly xylartase and cellulase activities. A total mixed ration (TMR), consisting of rolled barley, barley silage and alfalfa haylage (forage to concentrate ratio of 55:45

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Mutavhatsindi, Tshilidzi Faith. "Effects of fibrolytic enzyme and bacterial inoculants on the fermentation, chemical composition and aerobic stability of ensiled potato hash." Thesis, 2016. http://hdl.handle.net/11602/430.

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Chang, Chun-Ta, and 張俊達. "Effect of Adding a Commercial Fibrolytic Enzyme and Soluble Protein on Ruminal Fermentation, Enzyme Activity, and Degradation of Bermudagrass Hay." Thesis, 2005. http://ndltd.ncl.edu.tw/handle/35978610834685491340.

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碩士<br>東海大學<br>畜產與生物科技學系<br>93<br>Bermudagrass hay is often fed to dairy cow. It is high in fiber but slow in ruminal degradation, which may restrict nutrient availability for animal.The research object was to evaluate the effect of adding an exogenous fibrolytic enzyme product, mainly xylanase, on ruminal hay degradation in situ, changes in enzyme activities, and fermentation characteristics. In exp. 1, the effect on ruminal enzyme activities and in situ bermudagrass hay disappearance was estimated by adding different doses (0, 75 or 150 g/d) of a fibrolytic enzyme product to dairy cows. The

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Campioni, Tania Sila. "Development of bioprocess for fibrolytic fungal enzymes production from lignocellulosic residues and its application on kraft pulp biobleaching and xylooligosaccharides production /." 2018. http://hdl.handle.net/11449/180469.

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Orientador: Pedro de Oliva Neto<br>Resumo: Desejando ao final do trabalho obter um bioprocesso integrado usando palha de cana-de-açúcar (PC), este trabalho teve início com a utilização desse substrato para produção de enzimas fribrolíticas, xilanases e celulases, em culturas axênicas, incluindo espécies de Trichoderma e Aspergillus. A triagem para o melhor produtor foi realizada em “shaker” em fermentação submersa. A cultura do fungo T. reesei QM9414 alcançou a melhor produção de enzimas, e em tanque agitado, utilizando um biorreator de 3 L, mostrou o mesmo perfil de produção (~90 U/mL, 0.6 FP

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