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Dissertations / Theses on the topic 'Condensed tannins'

Author: Grafiati

Published: 4 June 2021

Last updated: 25 July 2025

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1

Gobius, Niilo Risto. "Ameliorating the influence of condensed tannins in ruminants /." [St. Lucia, Qld.], 2001. http://www.library.uq.edu.au/pdfserve.php?image=thesisabs/absthe16706.pdf.

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2

Mavrikou, Ioanna. "Intereferents in condensed tannins quantification by the vanillin assay." Master's thesis, ISA/UL, 2012. http://hdl.handle.net/10400.5/8616.

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Mestrado Vinifera EuroMaster - Instituto Superior de Agronomia<br>Different methods have been established in order to perform accurately the quantification of the condensed tannins in various plant products and beverages. The method of reaction in acid medium has been widely used for the quantification of condensed tannins. This method is based on the reaction of vanillin with the phenolic rings of condensed tannins and more specifically with the fusel aromatic rings of their flavan-3-ol units. In a previous study (Sun et al., 1998), several parameters that can affect the accuracy of the deter

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3

Eckerle, Gregory J. "Mitigation of condensed tannins found in sericea lespedeza (Lespedza cuneata)." Diss., Kansas State University, 2011. http://hdl.handle.net/2097/13088.

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Doctor of Philosophy<br>Department of Animal Sciences and Industry<br>K.C. Olson<br>Sericea lespedeza (SL; Lespedeza cuneata) is classified as an invasive plant throughout the Great Plains. It infests over 600,000 acres in Kansas. Increasing grazing pressure on SL may reduce seed production and slow the spread of the plant; however, intake of SL by grazing beef cattle is poor, due to the presence of tannins in the plant. Condensed tannins reduce protein digestion by ruminants and may also decrease plant palatability. Detailed study of the appetite-suppressing effects of SL under controlled con

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4

Ropiak, Honorata M. "Structural features of condensed tannins and their impact on bioactivities." Thesis, University of Reading, 2017. http://centaur.reading.ac.uk/77823/.

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Condensed tannins (CT) are bioactive plant compounds found in various fruits, vegetables, medicinal plants and forages. In the right concentration, CT have a beneficial impact on human and animal nutrition, health and welfare. In recent years, there has been a focus on their anti-parasitic effects against gastrointestinal nematodes. These effects are believed to be caused by CT-protein interactions, which are widely studied to better understand dietary protein utilisation by ruminants. To study their bioactivity, CT from medicinal plants and herbal products were isolated, quantified and analys

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5

Lan, Ping. "Condensed tannins extraction from grape pomace : characterization and utilization as wood adhesives for wood particleboard." Thesis, Université de Lorraine, 2012. http://www.theses.fr/2012LORR0242/document.

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Les marcs de raisin issus de la viniculture constituent un gisement de ressource naturelle abondant, sous valorisé et riche en polyphénols. Une méthode d?extraction de ces tannins condensés a été développée et optimisée en vue d'une application en adhésif pour les produits dérivés du bois. Les tannins ont été caractérisés par Résonance Magnétique Nucléaire, spectroscopie Infra Rouge (FTIR), spectrométrie de masse (MALDI TOF) et Analyse Thermomécanique (TMA). Des panneaux de particules ont été fabriqués à l'aide des colles élaborées en laboratoire et testés suivant les normes françaises en vigu

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6

Butter, Nicola L. "The effect of condensed tannins and dietary protein on ruminant intestinal nematode infections." Thesis, University of Nottingham, 1999. http://eprints.nottingham.ac.uk/12467/.

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Endoparasitic control is still heavily reliant on the use of anthelmintic drugs, however, frequent use and mis-use of anthelmintics is leading to the development of multiple resistance. In the tropics and subtropics where marginal levels of nutrition lead to greater susceptibility to infection, animal death due to nematode infection remains widely apparent. Here, anthelmintics are either unaffordable, of inferior quality or extensive multiple resistance has made these drugs ineffective. Consequently, alternative methods of parasitic control are required that are practical and realistic for int

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7

Bento, Maria Helena Lino. "The effects of condensed tannins on rumen and post-rumen digestion of nutrients." Thesis, University of Aberdeen, 2004. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.430272.

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Studies were conducted to evaluate the effects of tannins on <i>in sacco</i> disappearance in the rumen and post-ruminal digestion using the mobile bag and pepsin-pancreatin (<i>in vitro</i>) methods, and the tube-feeding technique in poultry. The treatment of <i>Lotus pedunculatus</i> with PEG increased <i>in sacco</i> disappearance compared with untreated lotus. Quebracho tannin (QT) reduced the disappearance of lupin seeds and soyabean meal. No effect of QT was found on the disappearance of chickpea, and an increase was observed for the disappearance of pea. <p class=MsoNormal>Tannins i

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8

Wong, Carolyn L. "Effects of Condensed Tannins on the Toxicity of Fireweed (Senecio madagascariensis) to Cattle." DigitalCommons@USU, 2014. https://digitalcommons.usu.edu/etd/3859.

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Fireweed (Senecio madagascariensis) is a noxious and invasive weed affecting pastures in Hawaii, Australia, and South America. Fireweed contains compounds called pyrrolizidine alkaloids that are toxic to most grazing mammals. Toxic effects to cattle include irreversible damage to liver cells, hardening of the liver, and loss of liver function, which may lead to jaundice, swelling, and the accumulation of fluids in the stomach and other physiological malfunctions. External effects include rough appearance, diarrhea, low energy and dullness, photosensitization, and abnormal behavior, many of whi

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9

McKiearnan, Allison Nicole. "Effects of condensed tannin on in vitro ruminal fermentation." Thesis, Kansas State University, 2015. http://hdl.handle.net/2097/18998.

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Master of Science<br>Department of Animal Sciences and Industry<br>KC Olson<br>Condensed tannins (CT) in plants are phenolic compounds with relatively high binding affinities for proteins. In ruminants, dietary CT limit DM intake and digestibility, and ruminal protein degradation by forming CT-protein complexes. Effects of dietary CT, animal species, prior dietary CT exposure, and antimicrobial inclusion on 48-h rate and extent of digestion were measured in two in vitro experiments. Cattle, sheep, and goats (n = 3 / species) were used in a 2-period, randomized complete-block experiment with a

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10

Athanasiadou, Spiridoula Georgiou. "The role of condensed tannins towards ovine nematodes and their consequences on host performance." Thesis, University of Edinburgh, 2001. http://hdl.handle.net/1842/26159.

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The aim of this thesis was to investigate the two hypotheses that have been put forward to account for the reduction in the level of parasitism observed in sheep that consume condensed tannins. For this purpose <i>in vitro</i> (larval development/viability assay) and <i>in vivo</i> experiments were performed. In the first two experiments, a model condensed tannin extract (Quebracho) was given as a drench to parasitised sheep to test for the direct effect of condensed tannins towards established adult nematodes. Experiment 1 aimed to provide evidence for a direct anthlemintic effect of condense

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11

Corazzola, Alessandro. "Quantification of condensed tannins in red wines by Fourier transform mid-infrared spectroscopy (FTIR)." Master's thesis, ISA/UL, 2012. http://hdl.handle.net/10400.5/8609.

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Mestrado Vinifera EuroMaster - Instituto Superior de Agronomia<br>Grape-derived condensed tannins, also known as proanthocyanidins, are critical quality components for red wines. They have been subject of numerous studies in order to find a fast and reliable methodology for their quantification. In this work it has been tested the method using Fourier transform mid-infrared (FTIR) and chemometrics to quantify the amount of condensed tannins present in 88 different red wines, with the reference method of precipitation with methylcellulose. As well it has been provided a single laboratory valida

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12

Kariuki, Innocent Weru. "Condensed tannins in tropical legume fodder trees : characterisation and interactions with rumen microbes, feed and endogenous proteins /." St. Lucia, Qld, 2004. http://www.library.uq.edu.au/pdfserve.php?image=thesisabs/absthe17410.pdf.

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13

Zeng, Liming. "Étude de la composition macromoléculaire du raisin et des vins : impact sur la qualité sensorielle." Thesis, Bordeaux, 2015. http://www.theses.fr/2015BORD0302/document.

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Les tanins condensés et les pigments polymérisés sont deux grandes familles de macromolécules qui jouent des rôles importants sur la qualité organoleptique du vin rouge. Leurs structures oligo-polymériques ainsi que leurs évolutions durant le vieillissement du vin rouge sont mal connues. L’objectif de cette étude est d’approfondir notre connaissance sur leurs structures et leurs évolutions durant le vieillissement. Durant ce travail, nous avons caractérisé, pour la première fois dans le règne végétal, une nouvelle sous-famille de tanins condensés nommés : les tanins condensés couronnes, qui on

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14

Liao, Jingjing. "Préparation et modification de composites thermoplastiques/tannins par extrusion réactive." Thesis, Université de Lorraine, 2019. http://www.theses.fr/2019LORR0071.

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Les tanins condensés sont largement répandus et très abondants dans la nature. Au cours des dernières décennies, ces tanins ont été abondamment utilisés pour la production de formulations thermodurcissables (par exemple, les adhésifs pour le collage du bois, les matériaux en mousse) en raison de leur réactivité chimique. Cependant, ils présentent également un grand potentiel en tant que composants pour la conception de matériaux polymères innovants en raison de leurs propriétés physico-chimiques (p. ex. antioxydantes, antimicrobiennes et stabilisantes). Afin d’étendre les domaines d’utilisatio

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15

Hedqvist, Helena. "Metabolism of soluble proteins by rumen microorganisms and the influence of condensed tannins on nitrogen solubility and degradation /." Uppsala : Dept. of Animal Nutrition and Management, Swedish Univ. of Agricultural Sciences, 2004. http://epsilon.slu.se/a501.pdf.

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16

Salawu, Mustapha Bello. "The nutritive value of the leguminous browse Calliandra calothyrsus and the role of condensed tannins in ruminant feeds." Thesis, University of Aberdeen, 1997. http://digitool.abdn.ac.uk/R?func=search-advanced-go&find_code1=WSN&request1=AAIU094729.

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Experiments were conducted to assess the potential of Calliandra calothyrsus as a feed for ruminants. The role of the condensed tannins in the nutritional quality of Calliandra and the ways of reducing the adverse effects were also investigated. Separate experiments were also conducted to evaluate the effects of condensed tannins in vivo in sheep and in vitro on rumen microbial activities. Lastly, the possibility of using tannins as silage additives was investigated. Calliandra samples were harvested from Zimbabwe and Kenya. The chemical composition of the plant showed that the leaves had a hi

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17

Ushio, Masayuki. "The role of condensed tannins as a potential driver of plant-soil feedbacks in a tropical montane forest." 京都大学 (Kyoto University), 2010. http://hdl.handle.net/2433/120701.

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18

Paissoni, Maria Alessandra. "Characterization of anthocyanins and condensed tannins from grapes and their qualitative incidence on astringency and bitterness sensory properties." Thesis, Bordeaux, 2018. http://www.theses.fr/2018BORD0383/document.

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Dans le vin rouge, les composés phénoliques sont souvent associés à la qualité du produit. Parmi eux, les anthocyanes sont responsables de la couleur du vin rouge et chaque cépage possède un génome spécifique déterminant le profil anthocyanique de chacun. Les pratiques culturales peuvent influencer l’accumulation de ces molécules dans la baie de raisin, tandis que les différentes techniques fermentaires peuvent modifier leur extraction. Les flavanols monomères, oligomères et polymères des pépins et des pellicules contribuent à l’amertume et l’astringence des vins. Pendant la vinification et l’

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19

Liao, Jingjing. "Préparation et modification de composites thermoplastiques/tannins par extrusion réactive." Electronic Thesis or Diss., Université de Lorraine, 2019. http://www.theses.fr/2019LORR0071.

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Les tanins condensés sont largement répandus et très abondants dans la nature. Au cours des dernières décennies, ces tanins ont été abondamment utilisés pour la production de formulations thermodurcissables (par exemple, les adhésifs pour le collage du bois, les matériaux en mousse) en raison de leur réactivité chimique. Cependant, ils présentent également un grand potentiel en tant que composants pour la conception de matériaux polymères innovants en raison de leurs propriétés physico-chimiques (p. ex. antioxydantes, antimicrobiennes et stabilisantes). Afin d’étendre les domaines d’utilisatio

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20

Wamatu, Jane N. Ambuku. "Effects of condensed and hydrolysable tannins on polypeptide degradation of various protein sources and microbial protease activity in vitro." Beuren Stuttgart Grauer, 2007. http://d-nb.info/989951545/04.

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21

Salvador, Mariana de Figueiredo Vala. "Vinificação com a casta Aragonez na presença de produtos alternativos de madeira. Efeitos na composição química e análise sensorial do vinho." Master's thesis, ISA/UTL, 2011. http://hdl.handle.net/10400.5/3918.

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Mestrado em Viticultura e Enologia - Instituto Superior de Agronomia<br>The main species of oak wood that are oenological recognized as quality, showing a great chemical composition to be in contact with wine, are French (Quercus petraea) and American (Quercus alba). Aging wine in oak barrels brings wine changes of colour, structure and especially in aroma, because during this time different reactions occur among phenolic compounds. However, these processes take a long time, delaying the moment of wines to be insert on the market. So, winemakers have been looking for alternatives that could a

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22

Amary, Nefza Mohamed. "Assessing the quality of forage for livestock in a semi-arid pastoral system in South Africa." University of the Western Cape, 2016. http://hdl.handle.net/11394/4869.

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Magister Scientiae (Biodiversity and Conservation Biology) - MSc (Biodiv and Cons Biol)<br>This study evaluated the nutritional quality of the forage plants in Namaqualand Granite Renosterveld vegetation in the Kamiesberg uplands of the Leliefontein communal area, South Africa. Determining the quality of forages is one of the most important factors necessary for the effective management of rangelands as it impacts on the nutrient needs of animals and consequently, the grazing capacity in rangelands. The edible portions of various forage plants were collected in the wet and dry seasons in 2012

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23

Costes-Thiré, Morgane. "Capacités d'automédication des petits ruminants : peuvent-ils sélectionner des aliments riches en tannins pour lutter contre les parasites gastro-instestinaux ?" Thesis, Université Clermont Auvergne‎ (2017-2020), 2017. http://www.theses.fr/2017CLFAC110.

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Les animaux sont constamment soumis à des variations de leur environnement auxquelles ils doivent s’adapter. Au sein des systèmes d’élevage qui reposent sur la stimulation de processus naturels réduisant les intrants requis pour la production, et dans une perspective agro-écologique, l’autonomie et les capacités d’adaptation des animaux apparaissent particulièrement importantes. Au pâturage, les petits ruminants sont confrontés au parasitisme par les nématodes gastro-intestinaux, qui représente une menace majeure notamment du fait du développement de résistance aux traitements anthelminthiques

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Legendre, Héloïse. "Approche agro-écologique de la gestion du parasitisme en élevage : application en système cunicole biologique." Thesis, Toulouse, INPT, 2017. http://www.theses.fr/2017INPT0101.

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L’étude des interactions entre système fourrager, santé et croissance des lapins contribuera à proposer de nouvelles pratiques pour des systèmes d’élevage cunicole alternatifs, tels que ceux en agriculture biologique (AB) incluant une gestion intégrée de la santé. Mais cette stratégie est limitée par le manque de références sur la cuniculture AB, i) sur l'alimentation au pâturage (ingestion de fourrages verts, qualités nutritionnelles pour les lapins, etc) ; et ii) sur les risques sanitaires notamment le parasitisme, identifié comme un frein important au développement de la cuniculture AB. L’e

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Preedy, Garrett William. "Herbivory habits of beef cows grazing native range infested by sericea lespedeza." Thesis, Kansas State University, 2013. http://hdl.handle.net/2097/15634.

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Master of Science<br>Department of Animal Sciences and Industry<br>KC Olson<br>Our objective was to determine the effects of supplemental corn steep liquor (CSL) on voluntary selection of sericea lespedeza (SL) by beef cows grazing native tallgrass range. Dietary botanical composition of cows (n = 145; initial BW = 579 ± 91 kg) was evaluated during a 150-d grazing period (5/1 to 10/1). Native pastures (n = 9; 50 ± 17 ha) infested by SL (average SL biomass = 37% of total forage biomass) were assigned randomly to 1 of 2 treatments: grazing by unsupplemented cows or grazing by cows supplemented w

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Pizol, José Vitor. "The effects of rockrose extract feed inclusion on the wool proteome of portuguese White Merinos." Master's thesis, ISA, 2020. http://hdl.handle.net/10400.5/21503.

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Mestrado em Engenharia Zootécnica - Produção Animal / Instituto Superior de Agronomia / Faculdade de Medicina Veterinária. Universidade de Lisboa<br>This study was carried out with the objective of evaluating the effect of feeding extract of rockrose (Cistus ladanifer L.), a perennial shrub commonly found in the marginal regions of Portugal and rich in condensed tannins (CT), and its effect on the wool proteome of Portuguese White Merinos. Twenty-four Portuguese White Merinos lambs were fed a diet restricted in protein and composed of grass hay (15%) and concentrate (85%), where they were dist

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Rosales, Rolando Barahona. "Condensed tannins in tropical forage legumes : their characterisation and study of their nutritional impact from the standpoint of structure-activity relationships." Thesis, University of Reading, 1997. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.298970.

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28

Reeves, Savanah Gail. "Condensed tannin characterization with FT-ICR MALDI mass spectrometry and separation with saw-tooth gradient HPLC." Miami University / OhioLINK, 2020. http://rave.ohiolink.edu/etdc/view?acc_num=miami1591185101154831.

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29

Rira, Moufida. "Les tanins hydrolysables et condensés : une piste pour la réduction de la production du méthane entérique par les ruminants en mileu tropical Intake, total-tract digestibility and methane emissions of Texel and Blackbelly sheep fed C4 and C3 grasses tested simultaneously in a temperate and a tropical area Ruminal methanogens and bacteria populations in sheep are modified by a tropical environment Potential of tannin-rich plants, Leucaena Leucocephala, Glyricidia sepium and Manihot esculenta, to reduce enteric methane emissions in sheep Potential of tannin-rich plants, Leucaena Leucocephala, Glyricidia sepium and Manihot esculenta, to reduce enteric methane emissions in sheep Potential of tannin-rich plants for modulating rumen microbes and ruminal fermentation in sheep Methanogenic potential of tropical feeds rich in hydrolyzable tannins." Thesis, Université Clermont Auvergne‎ (2017-2020), 2019. http://www.theses.fr/2019CLFAC065.

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En zone tropicale, la production de lait et de viande par les ruminants est limitée par une faible disponibilité et une qualité médiocre des fourrages. A ces contraintes alimentaires s’ajoute l’impact environnemental lié en particulier aux émissions de méthane entérique par les ruminants. L’objectif de cette thèse était de comparer la production de méthane en milieu tempéré et en milieu tropical, puis de valoriser des fourrages tropicaux connus pour leur richesse en tanins dont les propriétés anti-méthanogènes sont reconnues, et qui peuvent réduire l’impact environnemental sans compromettre la

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Manolaraki, Foteini. "Propriétés anthelminthiques du sainfoin (Onobrychis viciifoliae) : analyse des facteurs de variations et du rôle des composés phénoliques impliqués." Thesis, Toulouse, INPT, 2011. http://www.theses.fr/2011INPT0011/document.

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Les nématodes parasites du tube digestif demeurent une contrainte majeure pesant sur la santé, le bien être et les productions des petits ruminants élevés à l’herbe. Le mode usuel de maîtrise de ce parasitisme repose sur l’emploi répété de molécules chimiques anthelminthiques. Toutefois, le développement et la diffusion généralisée de résistances à ces molécules dans les populations de vers imposent désormais d’utiliser ces traitements avec discernement et de trouver des solutions complémentaires ou alternatives. L’incorporation dans la conduite d’élevage (ration des moutons ou des chèvres) de

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Bandau, Franziska. "Importance of tannins for responses of aspen to anthropogenic nitrogen enrichment." Doctoral thesis, Umeå universitet, Institutionen för fysiologisk botanik, 2016. http://urn.kb.se/resolve?urn=urn:nbn:se:umu:diva-120248.

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Boreal forests are often strongly nitrogen (N) limited. However, human activities are leading to increased N inputs into these ecosystems, through atmospheric N deposition and forest fertilization. N input into boreal forests can promote net primary productivity, increase herbivore and pathogen damage, and shift plant species composition and community structure. Genetic diversity has been suggested as a key mechanism to promote a plant species’ stability within communities in response to environmental change. Within any plant population, specific traits (e.g. growth and defense traits) can var

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Knox, Natalie. "An exploration of ecological concepts in the context of antimicrobial resistance and the use of phytochemical compounds within the ruminant gut microbiome." Agricultural Institute of Canada, publisher of Canadian Journal of Plant Science, 2008. http://hdl.handle.net/1993/14405.

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Secondary plant metabolites have recently been gaining interest in livestock production systems following the ban of in-feed antibiotics within the European Union. The rise in antimicrobial resistance found in pathogenic and non-pathogenic bacteria has lead to increased interest in the research community regarding the use of phythochemicals as an alternative to antibiotics. The purpose of this research was to evaluate the impact of including phytochemicals in a livestock production system. Specifically, a high tannin-containing forage, sainfoin (Onobrychis viciifolia), was evaluated in vitro f

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Nascimento, Ana Paula Recco. "Quantificação dos taninos dos vinhos por transformada de Fourier dos espectros no infravermelho médio (FTIR)." Master's thesis, ISA/UTL, 2011. http://hdl.handle.net/10400.5/4107.

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Mestrado em Viticultura e Enologia - Instituto Superior de Agronomia<br>Several analytical methods have been developed for the quantification of condensed tannins, however the time required and complexity of these methods difficult to implement in routine analysis. In this work the objective was to evaluate the application of Fourier transform mid-infrared spectroscopy for the quantification of total condensed tannins, as well as the determination of their polymeric fractions (FIII), oligomeric (FII) and monomeric flavan-3-ols (FI) in 55 red wines. Calibration models were developed using two m

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Furlan, Aurélien. "Interactions entre les tannins et les lipides : impact possible sur le goût du vin." Phd thesis, Université Sciences et Technologies - Bordeaux I, 2013. http://tel.archives-ouvertes.fr/tel-01053813.

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Lors de la dégustation d'un vin, les tannins sont responsables de deux propriétés gustatives, l'amertume et l'astringence, respectivement dues à des associations avec les protéines salivaires et les récepteurs au goût amer. Néanmoins, leurs intensités perçues en bouche vont dépendre de multiples facteurs, notamment la présence de molécules externes aux complexes tannin-protéine tel que les lipides, qu'ils soient situés au niveau des membranes buccales ou issus de l'alimentation. L'objectif de cette thèse a ainsi été d'examiner l'impact des lipides sur ces sensations organoleptiques. Pour ce fa

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Gambier, François. "Valorisation des marcs de raisins épuisés : vers un procédé d'extraction de tannins condensés à grande échelle pour la production d'adhesifs pour panneaux de particules." Thesis, Université de Lorraine, 2014. http://www.theses.fr/2014LORR0174/document.

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Les déchets issus de l’industrie vinicole française sont traditionnellement traités et valorisés en distilleries. Ce travail porte sur l’étude de la valorisation à échelle industrielle d’un des résidus ultimes des distilleries : le marc de raisin épuisé. Les marcs issus de différents bassins de productions français ont été caractérisés chimiquement, principalement par leur taux de tannins condensés et de sucres. Les conditions d’extraction des tannins condensés ont été optimisées en laboratoire puis le procédé a été transféré à l’échelle industrielle. Plusieurs extractions ont été menées dans

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Copani, Giuseppe. "Benefit of including bioactive legumes (sainfoin, red clover) in grass-based silages on ruminant production and pollutant emissions." Thesis, Clermont-Ferrand 2, 2015. http://www.theses.fr/2015CLF22594/document.

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Les légumineuses permettent de réduire les intrants en élevage (engrais, concentrés) en raison notamment de leurs niveaux élevés en protéines. Cependant, à la fois pendant le processus d'ensilage et celui de fermentation dans le rumen, les protéines peuvent subir une importante dégradation, ce qui affecte la valeur nutritive des fourrages et induit des rejets d'azote (N) importants, notamment dans l'urine. Certaines légumineuses peuvent alors être d'un intérêt particulier car elles produisent des composés secondaires qui peuvent modifier positivement les processus fermentaires et digestifs. Ai

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Theodoridou, Katerina. "Les effets des tannins condensés du sainfoin (Onobrychis viciifolia) sur sa digestion et sa valeur nutritive." Phd thesis, Université Blaise Pascal - Clermont-Ferrand II, 2010. http://tel.archives-ouvertes.fr/tel-00669557.

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Clemensen, Andrea K. "Understanding Plant Secondary Metabolites; Above and Below Ground." DigitalCommons@USU, 2018. https://digitalcommons.usu.edu/etd/7090.

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Plants naturally produce primary and secondary metabolites. Primary metabolites are directly involved with plant growth and metabolic function. Plant secondary metabolites (PSM) were once thought of as metabolic waste products, and more recently viewed as toxins to herbivores. However, ongoing research shows that PSM are beneficial to herbivores at low doses, and PSM aid plants by attracting pollinators, recovering from injury, protecting from ultraviolet radiation, increasing drought tolerance, and aid in defense against pathogens, diseases, and herbivores. Plant secondary metabolites also in

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Guerreiro, Olinda Rosa Fragoso das Neves. "Inclusion of Cistus ladanifer in ruminant diets : an approach to improve the nutritional value of edible fats." Doctoral thesis, Universidade de Lisboa, Faculdade de Medicina Veterinária, 2018. http://hdl.handle.net/10400.5/15786.

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Tese de Doutoramento em Ciências Veterinárias, na especialidade de Produção Animal<br>Cistus ladanifer is a shrub quite abundant in Mediterranean countries, that when fed to lambs has been associated with changes in rumen biohydrogenation (BH), increasing t11-18:1 concentration in abomasal digesta and meat. The thesis main motivation was to further knowledge regarding C. ladanifer plant and to explore its utilization in nutritional strategies to ruminal BH modulation. In the first two experiments, seasonal variation of C. ladanifer aerial parts, with two ages, was characterized for chemical co

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LeShure, Shirron Nicole. "Use of Naturally Occurring Anthelmintics to Control Gastrointestinal Parasites in Small Ruminants." The Ohio State University, 2014. http://rave.ohiolink.edu/etdc/view?acc_num=osu1397649276.

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Ballesteros, Raúl David Guevara. "Enteric Methane and Nitrogen Emissions in Beef Cattle Grazing a Tannin-Containing Legume Relative to Feedlot and Traditional Pasture-Based Production Systems." DigitalCommons@USU, 2019. https://digitalcommons.usu.edu/etd/7666.

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Beef cattle production is highly criticized because of the high use of land and water resources, and by the pollution (e.g., the gas methane in a cow’s breath and nitrogen in urine) produced by cows fed in feedlots. In contrast to feedlots diets and grasses, some plants (e.g., legumes) contain bioactive compounds (condensed tannins) that reduce pollution and enhance animal nutrition. In my research, I observed that cows grazing a tannin-containing legume (birdsfoot trefoil; BFT) had methane emissions similar to cows fed a feedlot ration with comparable weight gains. Cows in the BFT treatment g

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Fraquelli, C. "GLI ENDOPARASSITI NELL'ALLEVAMENTO CAPRINO: EPIDEMIOLOGIA, INTERAZIONE OSPITE-PARASSITA NELLE RAZZE AUTOCTONE ED INFLUENZA SULLE PRODUZIONI." Doctoral thesis, Università degli Studi di Milano, 2012. http://hdl.handle.net/2434/168081.

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The endoparasites in goat farms: epidemiology, host-parasite interaction in indigenous breeds and influence on production. The aim of this study was to assess the spread of endoparasites in goat farms in Lombardy, with particular attention to the epidemiological aspects. Further, an other objective was to study the the host-parasite relationship in indigenous breeds in order to contribute to the enhancement of these breeds, taking into account the biological, social, ecological and economic value related to their breeding. The ultimate purpose of this research is to provide a practical c

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Quijada, Pinango Jessica. "Relation structure/activité de tanins bioactifs contre les Nématodes Gastrointestinaux (Haemonchus contortus) parasites des petits ruminants." Phd thesis, Toulouse, INPT, 2015. http://oatao.univ-toulouse.fr/15130/1/quijada.pdf.

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Les nématodes gastrointestinaux (NGIs) représentent une contrainte majeure en élevage des ruminants. Jusqu’à présent, la maîtrise de ces parasitoses a reposé essentiellement sur l’emploi répété de traitements anthelminthiques (AH) de synthèse. Cependant, le développement constant de résistances aux AH dans les populations de nématodes chez les petits ruminants conduit à rechercher des méthodes alternatives ou complémentaires de lutte contre ces parasitoses. Au cours des deux dernières décennies, les données se sont accumulées montrant que certaines plantes étaient dotées de propriétés anthelmi

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Chupin, Lucie. "Etude de l’extraction de tanins d’écorce de pin maritime pour l’élaboration de colles tanin-lignosulfonate." Thesis, Pau, 2014. http://www.theses.fr/2014PAUU3023/document.

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Cette étude a deux objectifs principaux : l’extraction de tanins condensés d’écorces de pin maritime et la formulation de colles tanin-lignosulfonate. Deux méthodes d’extraction ont été étudiées. La première est une extraction à l’eau chaude ; c’est une technique simple, peu coûteuse, sans solvant. La deuxième est une extraction assistée par micro-ondes ; c’est une technique innovante, rapide et peu consommatrice en solvant. L’optimisation des conditions d’extraction à l’eau chaude a été réalisée. Les extraits ont été caractérisés par des dosages colorimétriques, leur réactivité au formaldéhyd

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Smith, Eric A. "Developmental Contributions to Variation in Aspen Clones and the Influence of Pre-Fire Succession Status on Aspen Regeneration Success." BYU ScholarsArchive, 2010. https://scholarsarchive.byu.edu/etd/2259.

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This thesis includes two studies: The first examined developmental changes that take place in the physiology of aspen (Populus tremuloides Michx.) and to characterize developmental influences on patterns of phenotypic trait variation among different aged ramets within the aspen clones. We surveyed eight clones, each with 8 distinct age classes ranging from 1 to 170 yrs in age. Using regression analysis we examined the relationships between ramet age and expression of functional phenotypes. Eight of the phenotypic traits demonstrated a non-linear relationship in which large changes in phenotype

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Zozio, Suzie. "Contribution à la connaissance de la variabilité qualitative de la pomme surette (ziziphus mauritiana lamk. ) dans une perspective de valorisation." Antilles-Guyane, 2014. http://www.theses.fr/2014AGUY0739.

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Williams, Christina Marie. "Assessment of Ruminal Fermentation Characteristics of Condensed Tannin-Containing Forages Using Continuous Cultures." DigitalCommons@USU, 2010. https://digitalcommons.usu.edu/etd/773.

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Two independent studies were conducted to assess the effects of feeding condensed tannin (CT)-containing forages to continuous cultures to evaluate their impacts on ruminal fermentation and digestibility, with an emphasis on methane (CH4) and ammonia-N (NH3-N) production. In Chapter 3, treatments consisted of: 1) 100% alfalfa hay (AH), 2) 50% AH and 50% birdsfoot trefoil hay (dry matter (DM) basis; AHBFTH), and 3) 100% birdsfoot trefoil hay (BFTH). Three replicated runs lasted 8 d each, with the first 5 d allowed for microbial adaptation to the diets, and 3 d for data collection and sampling.

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Azevedo, Junior Ricardo Lima de. "PRODUTIVIDADE E COMPOSIÇÃO QUÍMICA DE FORRAGEM DE AMENDOIM FORRAGEIRO E TREVO VERMELHO CONSORCIADOS COM GRAMÍNEAS." Universidade Federal de Santa Maria, 2011. http://repositorio.ufsm.br/handle/1/10766.

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Conselho Nacional de Desenvolvimento Científico e Tecnológico<br>The objective of this research was to evaluate tree pasture-based systems (PS) with elephant grass (EG) + spontaneous growing species (SGS), ryegrass (RG), for PS1; EG + SGS + forage peanut, for PS2; and EG + SGS + RG + red clover, for PS3. EG was planted 4 m spaced rows. In the cool-season, ryegrass was sowed between rows of EG; red clover was sowed and the forage peanut was preserved in respectively PS. Experimental design was completely randomized with tree treatments (SF), two replicates (paddocks) in completely split-plot ti

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SOUZA, Rayanne Thalita de Almeida. "Potencial taninífero da jurema preta e do angico vermelho avaliado por diferentes métodos." Universidade Federal Rural de Pernambuco, 2015. http://www.tede2.ufrpe.br:8080/tede2/handle/tede2/6464.

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Submitted by Mario BC (mario@bc.ufrpe.br) on 2017-02-20T14:19:44Z No. of bitstreams: 1 Rayanne Thalita de Almeida Souza.pdf: 2435652 bytes, checksum: d445e67d5f3ef4f0224c8375ec031fcb (MD5)<br>Made available in DSpace on 2017-02-20T14:19:44Z (GMT). No. of bitstreams: 1 Rayanne Thalita de Almeida Souza.pdf: 2435652 bytes, checksum: d445e67d5f3ef4f0224c8375ec031fcb (MD5) Previous issue date: 2015-08-07<br>Coordenação de Aperfeiçoamento de Pessoal de Nível Superior - CAPES<br>The chemical characterization and the determination of secondary compounds in native legumes are very important for enabl

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Komolong, Miok Kasek. "Condensed tannin of fresh Leucaena forages and their role in protein digestion and nitrogen retention of weaner sheep /." St. Lucia, Qld, 2002. http://www.library.uq.edu.au/pdfserve.php?image=thesisabs/absthe16905.pdf.

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