Chemical composition of silages treated with some volatile fatty acids, with special reference to the changes in sugars

1977 ◽  
Vol 28 (1) ◽  
pp. 78-84 ◽  
Author(s):  
Yoshinobu Ohyama ◽  
Shigehiko Masaki
Keyword(s):  
Fatty Acids ◽  
Chemical Composition ◽  
Special Reference ◽  
Volatile Fatty Acids

Domiati cheese made with ultrafiltered reconstituted milk and lipolysed recombined cream

1983 ◽  
Vol 50 (2) ◽  
pp. 237-240 ◽  
Author(s):  
Mohamed E. Abd El-Salam ◽  
Safinaz El-Shibiny ◽  
Laila A. El-Koussey ◽  
Hamdy F. Haggag
Keyword(s):  
Fatty Acids ◽  
Chemical Composition ◽  
Volatile Fatty Acids ◽  
New Product ◽  
New Method ◽  
Total Volatile ◽  
Traditional Cheese ◽  
Tyrosine Content ◽  
Reconstituted Milk

SummaryA new method was developed for making Domiati cheese, based on blending ultrafiltered reconstituted milk and lipolysed recombined cream. The chemical composition of the new product was similar to the traditional cheese. The flavour intensity increased with the amount of lipase used in the cream hydrolysis. During storage the acidity and tyrosine content of cheese from different treatments increased at nearly similar rates. The level of total volatile fatty acids was affected by the level of lipase used. Organoleptic scoring showed that cheese made with cream treated with the intermediate levels of lipase (2 or 5 g/500 g cream) ranked the highest, after 1 and 4 months of storage respectively.

scholarly journals Proportions of Volatile Fatty Acids in Relation to the Chemical Composition of Feeds Based on Grass Silage

1998 ◽  
Vol 81 (5) ◽  
pp. 1331-1344 ◽  
Author(s):  
N.C. Friggens ◽  
J.D. Oldham ◽  
R.J. Dewhurst ◽  
G. Horgan
Keyword(s):  
Fatty Acids ◽  
Chemical Composition ◽  
Volatile Fatty Acids ◽  
Grass Silage

The composition of rumen fluid from cows fed biuret and urea

1968 ◽  
Vol 35 (2) ◽  
pp. 203-212 ◽  
Author(s):  
R. Waite ◽  
Agnes G. Wilson
Keyword(s):  
Fatty Acids ◽  
Chemical Composition ◽  
Milk Production ◽  
Volatile Fatty Acids ◽  
Rumen Fluid ◽  
Total Volatile ◽  
Urea Treatment ◽  
Lactating Cows ◽  
Total Fatty Acids ◽  
Dietary Treatments

SummaryThe effect on the chemical composition of rumen fluid of replacing oilcake nitrogen by either biuret or urea N in the concentrate part of the ration for cows has been investigated. The biuret treatment produced the highest concentrations of NPN and the lowest concentrations of ammonia N in the fluid, whereas the urea treatment gave rise to higher concentrations of NPN than did the oilcake treatment and the highest ammonia N concentrations of the 3 diets. It is unlikely, however, that the differences in either peak or mean ammonia concentrations between the biuret and urea diets, if they occurred in lactating cows receiving these diets, would be sufficient to affect milk production. The concentration of ammonia N in the rumen liquor of cows on the biuret diet increased progressively up to the 5th to 8th week of feeding this diet. The different dietary treatments did not result in any marked differences in the concentrations of total volatile fatty acids in the rumen fluids or in the proportions of acetic, propionic and butyric acids in the total fatty acids.

Nutrient and trace element supply in anaerobic digestion plants and effect of trace element application

2012 ◽  
Vol 66 (9) ◽  
pp. 1923-1929 ◽  
Author(s):  
H. Lindorfer ◽  
D. Ramhold ◽  
B. Frauz
Keyword(s):  
Fatty Acids ◽  
Trace Elements ◽  
Anaerobic Digestion ◽  
Chemical Composition ◽  
Trace Element ◽  
Volatile Fatty Acids ◽  
Bacterial Biomass ◽  
Substrate Feeding ◽  
Macro And Micronutrients ◽  
Process Disturbances

To investigate process behaviour and process disturbances in anaerobic digestion (AD) plants, samples of more than 1500 main digesters were taken and concentrations of macro- and micronutrients as well as volatile fatty acids were analyzed. Out of these samples, 600 digesters using energy crops only and 80 digesters using waste substrates were selected to compare the chemical composition as a result of different substrate feeding. High variations in element concentrations were found in both groups. In 60 plants with low micronutrient levels, trace elements were added and process changes were observed. A significant decrease of volatile fatty acids and an increase in digester performance were measured after trace element application. Furthermore, an increase of bacterial biomass could be detected.

scholarly journals Utilization of salts of volatile fatty acids by growing sheep

1966 ◽  
Vol 20 (2) ◽  
pp. 307-315 ◽  
Author(s):  
E. R. Ørskov† ◽  
F. D. Hovell‡ ◽  
D. M. Allen
Keyword(s):  
Fatty Acids ◽  
Chemical Composition ◽  
Coefficient Of Variation ◽  
Volatile Fatty Acids ◽  
Basal Diet ◽  
Metabolizable Energy ◽  
Calcium Salts ◽  
Ewe Lambs ◽  
Body Weights ◽  
Basal Ration

1. In two experiments with growing and fattening lambs sodium and calcium salts of volatile fatty acids (VFA) were added to a basal diet of hay and concentrate. In Expt I the lambs were approaching maturity, and the utilization of salts of acetic, propionic and butyric acids was studied. In Expt 2 the animals were younger; the experimental groups received acetate or propionate, and half of them were implanted with hexoestrol. The chemical composition of the carcass was assessed with the loin as a representative joint. The influence of the VFA salts on the digestibility of the basal ration was also investigated. 2. In both experiments the lambs receiving supplements of VFA salts grew faster, and their empty body weights and carcass weights were significantly greater than in lambs receiving the basal diet. 3. The energy derived from acetate and propionate was utilized more efficiently to promote carcass gains than the calculated metabolizable energy above maintenance of the basal ration. There were no differences in the utilization of energy from the different VFA, except in Expt I in which butyrate was utilized somewhat less efficiently than acetate and propionate. 4. Hexoes-trol implantation resulted in faster growth, and highly significantly greater empty body weights and carcass weights. There was no evidence of an interaction between the VFA and hexoestrol treatments. 5. There were no differences between the VFA treatments in the composition of the carcass gains as judged by the composition of the loins, except in Expt I in which lambs receiving acetate tended to be the fattest. The coefficient of variation in loin fat percentages was large in both experiments, but, in Expt I in which both ewe and wether lambs were used, the coefficient of variation among the wether lambs was four times that of the ewe lambs. 6. Additions of VFA salts to the diet resulted in a significant increase in the excretion of ash.

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