CHARACTERIZING VOLATILE FATTY ACIDS AND OTHER GASES IN A RUMEN CLOSED IN VITRO FERMENTATION SYSTEM USING SOLID PHASE MICROEXTRACTION

2003 ◽  
Vol 46 (2) ◽  
Author(s):  
J. P. Spinhirne ◽  
J. A. Koziel ◽  
N. K. Chirase
Keyword(s):  
Fatty Acids ◽  
Solid Phase Microextraction ◽  
Volatile Fatty Acids ◽  
Solid Phase ◽  
In Vitro Fermentation ◽  
Fermentation System

scholarly journals Passage of protozoa and volatile fatty acids from the rumen of the sheep and from a continuous in vitro fermentation system

1974 ◽  
Vol 32 (2) ◽  
pp. 341-351 ◽  
Author(s):  
R. A. Weller ◽  
A. F. Pilgrim
Keyword(s):  
Fatty Acids ◽  
Volatile Fatty Acids ◽  
Rumen Fluid ◽  
In Vitro Fermentation ◽  
Fermentation System

1. A procedure for sampling digesta from within the omasal canal of sheep given a variety of roughage diets was used to enable comparison to be made of the composition of effluent from the reticulo-rumen with that of rumen fluid.2. Concentrations of protozoa in effluents, relative to a soluble marker continuously infused intraruminally, were usually less than 20% of corresponding rumen fluid concentrations. It was estimated that the amount of protozoal nitrogen leaving the rumen represented less than 2% of dietary N.3. Passage of volatile fatty acids (VFA) from the rumen in effluent was less than 75% of that indicated by rumen concentrations.4. A continuous, in vitro fermentation system was developed, in which outputs of protozoa were comparable with in vivo outputs.

scholarly journals Changes of Volatile Fatty Acids and Riboflavin in Cecal Contents of Rabbit in the in vitro Fermentation

1975 ◽  
Vol 46 (11) ◽  
pp. 614-620
Author(s):  
Tsutomu YOSHIDA ◽  
Keiko NAKATANI ◽  
Makoto KANDATSU
Keyword(s):  
Fatty Acids ◽  
Volatile Fatty Acids ◽  
In Vitro Fermentation

The production and absorption of volatile fatty acids from the rumen of the sheep

1968 ◽  
Vol 19 (5) ◽  
pp. 791 ◽  
Author(s):  
GJ Faichney
Keyword(s):  
Fatty Acids ◽  
Acetic Acid ◽  
Butyric Acid ◽  
Volatile Fatty Acids ◽  
Metabolizable Energy ◽  
The Other ◽  
In Vitro Fermentation ◽  
The Mean ◽  
The Difference

Experiments are reported in which sheep were given roughage diets or a high concentrate diet and the VFA absorbed from the rumen were estimated by an in vitro fermentation procedure. The VFA absorbed were compared with the digestible and metabolizable energy intakes of the sheep, determined in digestibility trials, for each diet. For a lucerne diet, a straw diet, and the high concentrate diet the proportions of the digested energy absorbed as VFA were 33.6, 42.4, and 33.2% respectively. On the lucerne diet, the difference between the mean molar proportions of the VFA absorbed and the mean molar proportions of the VFA in the rumen approached significance for acetic acid (P < 0.10) and was highly significant for butyric acid (P < 0.01). The differences were not significant for the other diets.

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