| Evaluation of feeding glycerol on free-fatty acid production and fermentation kinetics of mixed ruminal microbes in vitro. | |
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MedLine Citation:
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PMID: 20580225 Owner: NLM Status: MEDLINE |
Abstract/OtherAbstract:
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Ruminant-derived foods contain high proportions of saturated fats as a result of ruminal biohydrogenation that rapidly saturates and thus limits the availability of free unsaturated fatty acids for assimilation. The objective of this study was to evaluate the effects of glycerol on ruminal free-fatty acid (FFA) production rates and in vitro fermentation kinetics of alfalfa hay. In vitro incubations demonstrated 48% and 77% reductions in rates of FFA accumulation in incubations supplemented with 2% and 20% glycerol as compared to controls. In vitro incubations with alfalfa hay demonstrated that increasing levels of glycerol did not affect NDF digestibility of the hay. Additionally, increasing amounts of glycerol decreased the acetate to propionate ratio in the rumen. These results suggest that inhibiting bacterial fat degradation may promote ruminal passage of total lipid, thereby providing greater proportions of beneficial unsaturated fat for incorporation into beef products. |
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Authors:
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N A Krueger; R C Anderson; L O Tedeschi; T R Callaway; T S Edrington; D J Nisbet |
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Publication Detail:
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Type: Journal Article Date: 2010-06-26 |
Journal Detail:
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Title: Bioresource technology Volume: 101 ISSN: 1873-2976 ISO Abbreviation: Bioresour. Technol. Publication Date: 2010 Nov |
Date Detail:
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Created Date: 2010-07-13 Completed Date: 2010-10-21 Revised Date: - |
Medline Journal Info:
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Nlm Unique ID: 9889523 Medline TA: Bioresour Technol Country: England |
Other Details:
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Languages: eng Pagination: 8469-72 Citation Subset: IM |
Copyright Information:
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Published by Elsevier Ltd. |
Affiliation:
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United States Department of Agriculture, Agriculture Research Service, Southern Plains Agriculture Research Center, Food and Feed Safety research Unit, 2881 F&B Road, College Station, TX 77845, USA. |
Export Citation:
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APA/MLA Format Download EndNote Download BibTex |
| MeSH Terms | |
Descriptor/Qualifier:
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Animals Bacteria / drug effects*, metabolism* Fatty Acids, Nonesterified / biosynthesis* Fatty Acids, Volatile / analysis Fermentation / drug effects* Glycerol / pharmacology* Kinetics Medicago sativa / metabolism Rumen / drug effects*, microbiology* |
| Chemical | |
Reg. No./Substance:
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0/Fatty Acids, Nonesterified; 0/Fatty Acids, Volatile; 56-81-5/Glycerol |
From MEDLINE®/PubMed®, a database of the U.S. National Library of Medicine
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