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Novel strategies and compounds to de...

Ungerfeld, Emilio M.

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Novel strategies and compounds to decrease ruminal methanogenesis in vitro.

紀錄類型:	書目-語言資料,印刷品 : Monograph/item
正題名/作者:	Novel strategies and compounds to decrease ruminal methanogenesis in vitro./
作者:	Ungerfeld, Emilio M.
面頁冊數:	308 p.
附註:	Adviser: Steven R. Rust.
Contained By:	Dissertation Abstracts International64-12B.
標題:	Agriculture, Animal Culture and Nutrition. -
電子資源:	http://pqdd.sinica.edu.tw/twdaoapp/servlet/advanced?query=3116055
ISBN:	9780496634910

Novel strategies and compounds to decrease ruminal methanogenesis in vitro.
Ungerfeld, Emilio M.

Novel strategies and compounds to decrease ruminal methanogenesis in vitro. - 308 p.

Adviser: Steven R. Rust.

Thesis (Ph.D.)--Michigan State University, 2003.

Novel strategies and compounds to inhibit methane (CH4) formation in the rumen were evaluated. Inhibition when attempting the inhibition of pyruvate oxidative decarboxylation was small.

ISBN: 9780496634910Subjects--Topical Terms:

1017857
Agriculture, Animal Culture and Nutrition.

Novel strategies and compounds to decrease ruminal methanogenesis in vitro.
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245 1 0 $a Novel strategies and compounds to decrease ruminal methanogenesis in vitro.
300 $a 308 p.
500 $a Adviser: Steven R. Rust.
500 $a Source: Dissertation Abstracts International, Volume: 64-12, Section: B, page: 5850.
502 $a Thesis (Ph.D.)--Michigan State University, 2003.
520 $a Novel strategies and compounds to inhibit methane (CH4) formation in the rumen were evaluated. Inhibition when attempting the inhibition of pyruvate oxidative decarboxylation was small.
520 $a Propynoic acid and ethyl 2-butynoate decreased CH4 production, although they decreased apparently fermented OM (FOM) and resulted in accumulation of H2, formate, and ethanol. In contrast, beta-hydroxybutyrate, crotonate, and 3-butenoic acid increased FOM.
520 $a Aphidicolin and 3-bromopropanesulfonate did not affect CH4 formation. Lumazine and a novel hexadecatrienoic acid decreased CH4 production but decreased FOM. Olive oil did not decrease CH4 production, but increased propionate production without affecting FOM.
520 $a Combinations of lumazine, propynoic acid, and ethyl 2-butynoate with crotonic acid or 3-butenoic acid were hypothesized to improve FOM and decrease accumulation of H2, formate and ethanol. Crotonic acid and 3-butenoic acid were ineffective in decreasing H2, formate, and ethanol and improving degradation. Lumazine, propynoic acid, and ethyl 2-butynoate decreased N degradation and increased microbial OM and N production and synthetic efficiencies. Propynoic acid and the highest concentration of ethyl 2-butynoate also decreased OM and NDF degradation.
520 $a Differences in sensitivity to inhibitors were found among three ruminal methanogens. Methanobrevibacter ruminantium was the most sensitive to 2-bromoethanesulfonate, propynoic acid, and ethyl 2-butynoate, Methanosarcina mazei was the least sensitive to those chemicals, and Methanomicrobium mobile was intermediate. M. ruminantium was the least sensitive to lumazine.
520 $a Lumazine caused mild and variable decreases in CH4 production. It did not impair OM or NDF degradation, and increased microbial N and OM production. It decreased proteolysis, which can increase N retention and decrease N release into the environment. Use of propynoic acid in ruminant diets could be problematic because of potential toxicity. However, it is of interest to understand how it improved microbial synthetic efficiencies. Inclusion of ethyl 2-butynoate in the diet to decrease CH4 production by about 50% might not affect OM and NDF degradation, decrease proteolysis and increase microbial N flow. Ethyl 2-butynoate toxicity has not been investigated, but it is advantageous that it disappeared after 24 h of incubation. The greatest problem is to rechannel electrons away from H2, formate, and ethanol into nutritionally useful sinks.
590 $a School code: 0128.
650 4 $a Agriculture, Animal Culture and Nutrition. $3 1017857
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710 2 $a Michigan State University. $3 676168
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790 1 0 $a Rust, Steven R., $e advisor
791 $a Ph.D.
792 $a 2003
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