Studies on the production of volatile fatty acids from grass by rumen liquor in an artificial rumen: II. The volatile fatty acid production from dried grass
- 1 August 1957
- journal article
- Published by Cambridge University Press (CUP) in The Journal of Agricultural Science
- Vol. 49 (2), 171-179
- https://doi.org/10.1017/s0021859600036157
Abstract
1. A study has been made of the production of volatile fatty acids obtainable from dried grass and its gross water-soluble and water-insoluble separates, in the artificial rumen, over two growing seasons. 2. In contradistinction to fresh grass, the dried grass gives a consistent production of acetic acid proportionately greater than propionic acid, at all stages of maturity, but when aqueous extracts of the dried grass, and the resultant extracted grass, respectively, are examined separately in the artificial rumen, it is found that the former yield preponderating amounts of acetic acid while the latter give amounts of propionic acid equal to, or exceeding, the corresponding productions of acetic acid. 3. An examination of the titration curves for the total acids obtained from the dried grass, extracted grass and grass extract runs, indicates an approach to an incomplete relationship between the residual carbohydrate in the extracted grass and cellulose, while the grass extract reveals itself as the chief source of acetic acid in the whole dried grass, the acid being formed very speedily at the start of the run. 4. The suggested sources and some of the possible metabolic pathways involved in the formation of v.f.a. from grass are discussed in the text.Keywords
This publication has 25 references indexed in Scilit:
- Prevention of Alloxan Diabetes by Sodium Nitrite and ParaminopropiophenoneScience, 1954
- Studies of some Presumptive Lactobacilli isolated from the Rumens of Young CalvesJournal of General Microbiology, 1954
- Silage FermentationSoil Science, 1954
- Analytical studies on the carbohydrates of grasses and clovers. III.—Carbohydrate breakdown during wilting and ensilageJournal of the Science of Food and Agriculture, 1953
- The water‐soluble carbohydrates of grasses. I.—Changes occurring during the normal life‐cycleJournal of the Science of Food and Agriculture, 1953
- The identification and determination of the lower straight-chain fatty acids by paper partition chromatographyThe Analyst, 1953
- The Fatty Acids Present in the Rumen of Lambs Fed on a Flaked Maize RationBritish Journal of Nutrition, 1952
- On Ruminococcus flavefaciens, a Cellulose-decomposing:Bacterium from the Rumen of Sheep and CattleJournal of General Microbiology, 1951
- A Colorimetric Method for the Determination of SugarsNature, 1951
- The Mechanism of Propionic Acid Formation by Veillonella gazogenesJournal of General Microbiology, 1951