scholarly journals Changes in ruminal fermentation and blood metabolism in steers fed low protein TMR with protein fraction-enriched feeds

2016 ◽  
Vol 43 (3) ◽  
pp. 379-386
Author(s):  
Chang Weon Choi
Keyword(s):  
Protein Fraction ◽  
Ruminal Fermentation ◽  
Low Protein

scholarly journals PROPERTIES OF THE CAUSATIVE AGENT OF A CHICKEN TUMOR

1932 ◽  
Vol 56 (1) ◽  
pp. 91-106 ◽  
Author(s):  
James B. Murphy ◽  
Ernest Sturm ◽  
Albert Claude ◽  
Oscar M. Helmer
Keyword(s):  
Protein Content ◽  
Aluminum Hydroxide ◽  
Causative Agent ◽  
Protein Fraction ◽  
Low Protein ◽  
Biological Tests

By two methods a protein fraction can be separated out from a Chicken Tumor I extract, which carries all the tumor-producing agent. The precipitate can be dissolved and reprecipitated a number of times without loss of activity. The agent can be largely dissociated from the protein as shown by the fact that aluminum hydroxide will adsorb the protein from an extract and leave the agent behind. This purified material has a very low protein content, if any, as shown by both chemical and biological tests.

scholarly journals Nitrogen Accumulation and Grain Protein Fraction of a Low-protein Strain in Two-rowed Barley.

1994 ◽  
Vol 63 (2) ◽  
pp. 247-253 ◽  
Author(s):  
Akihiro SASAKI ◽  
Masaru OHTSUKA ◽  
Tsuneo KATO ◽  
Akira KAMINAGA
Keyword(s):  
Protein Fraction ◽  
Grain Protein ◽  
Nitrogen Accumulation ◽  
Low Protein ◽  
Protein Strain

Preliminary study on the effects of ammonium nicotinate on in vitro ruminal fermentation as determined using rumen simulation technique (Rusitec)

2011 ◽  
Vol 51 (3) ◽  
pp. 233 ◽  
Author(s):  
Carla R. Soliva ◽  
Carmen Kunz
Keyword(s):  
In Vitro Study ◽  
Basal Diet ◽  
Short Chain Fatty Acids ◽  
Simulation Technique ◽  
Control Treatment ◽  
Lower Amount ◽  
Ruminal Fermentation ◽  
The Third ◽  
Low Protein

The objective of the present in vitro study was to investigate the effects of different dietary supplementation levels of ammonium nicotinate (NA-NH4), a precursor product when manufacturing nicotinic acid (NA), on ruminal fermentation traits. Four experimental runs were carried out incubating ruminal fluid from a donor cow by using rumen simulation technique (Rusitec). A low-protein (109 g/kg feed dry matter) basal diet, consisting of maize silage, hay and concentrate, served as the first control. Supplements were NA at 4.7 mg/day (second control), NA-NH4 at supplementation rates of 2.7, 5.4, 10.7 and 21.4 mg/day, or NH4-sulfate at 2.53 mg/day (the third control). All NA-containing treatments were supplemented with the same amount of sulfate as supplied with the third control treatment. None of the NA-supplements affected any of the fermentation traits significantly compared with the first control treatment, except for a decrease in total short-chain fatty acids at the highest supplementation rate of NA-NH4. No differences were found between the treatments containing the same amount of NA, i.e. the second control and the NA-NH4 treatment at 5.4 mg/day. Comparing the different NA-NH4 supplementation rates revealed that 5.4 mg/day of NA-NH4 resulted in a lower amount of nitrogen (N) recovered in ammonia than the highest NA-NH4 supplementation rate, and increased non-ammonia N. The findings confirmed the suitability of NA-NH4, instead of pure NA, as a feed supplement; however, increasing NA-NH4-supplementation above the typical rate for dairy cattle might negatively affect ruminal fermentation.

Volatile fatty acids in the rumen of African sheep given a variety of low-protein diets

1964 ◽  
Vol 6 (1) ◽  
pp. 91-96 ◽  
Author(s):  
J. H. Topps ◽  
R. C. Elliott
Keyword(s):  
Fatty Acids ◽  
Organic Matter ◽  
Acetic Acid ◽  
Protein Content ◽  
Volatile Fatty Acids ◽  
Acid Mixture ◽  
Ruminal Fermentation ◽  
Low Protein ◽  
Protein Diets ◽  
Total Concentrations

SUMMARY1. Total concentrations of volatile fatty acids and molar proportions of acetic, nrooionic and butyric acids were determined in the rumen of Blackhead Persian sheep given sixteen low-protein diets.2. Total concentrations of acids ranged from 2·89 to 9·33 millimoles/ 100 ml. of rumen liquor. Both digestibility and protein content of the ration had a significant effect on the concentration of volatile fatty acids in the rumen liquor. Protein content of the diet probably influenced the latter through controlling the rate of ruminal fermentation.3. Molar proportions of acetic acid varied from 59·7% to 69·3%, of propionic acid from 21·2% to 29·6%, and of butyric plus higher acids from 7·6% to 16·3%. Protein content of the diet had no significant effect on the composition of the acid mixture, but organic matter digestibility was inversely related to the proportion of acetic acid.4. The fermentation in the rumen of Blackhead Persian sheep, as judged by the volatile fatty acids produced, appears to be similar to that found in European breeds of sheep.

Effect of protein level and grain source on milk production, nutrient digestibility and ruminal fermentation in primiparous Holstein cows

2021 ◽  
pp. 1-7
Author(s):  
H. Mirzaei-Alamouti ◽  
A. Mohammad ◽  
M. Vazirigohar ◽  
P. Rezamand ◽  
M. Mansouryar
Keyword(s):  
Milk Production ◽  
Protein Level ◽  
Nutrient Digestibility ◽  
High Protein ◽  
Production Performance ◽  
Holstein Cows ◽  
Ruminal Fermentation ◽  
Low Protein ◽  
High Protein Diets ◽  
Protein Diets

Abstract This study investigated whether the interaction of protein level and grain type can affect milk production, nutrient digestibility and rumen fermentation in primiparous Holstein cows. Four dietary treatments were used: high-protein with barley as the only grain source, HP-B; (2) high-protein with an equal mix of barley and maize, HP-BM; (3) low-protein with barley as the only grain source, LP-B and (4) low-protein with equal proportions of barley and maize, LP-BM. High-protein diets showed no improvement in milk or protein yield compared with low-protein, but barley and maize mix diets increased energy-corrected milk yield and fat yield compared with barley-only diets. The highest total apparent digestibility of dry matter, organic matter and neutral detergent fibre was observed for LP-BM whereas HP-BM showed the greatest crude protein digestibility. Treatment had no effect on total volatile fatty acid concentrations, molar proportion of acetate and propionate and acetate to propionate ratio. The lowest ruminal pH was observed for LP-B. High-protein diets resulted in greater concentrations of ammonia nitrogen (N), urinary N, blood and milk urea nitrogen compared with low-protein diets, whereas low-protein diets showed better nitrogen utilization efficiency. This study showed that primiparous lactating cows do not benefit from high-protein diets with different fermentation rates of grain sources, but barley and maize diets may improve milk production performance, ruminal fermentation and pH under the present dietary conditions. The current results on milk production performance should be interpreted with caution due to the small number of cows used (eight in each treatment).

Studies on the Density of Water Adsorbed on Low-Protein Fraction of Flour

1967 ◽  
Vol 32 (4) ◽  
pp. 442-445 ◽  
Author(s):  
C. GUR-ARIEH ◽  
A. I. NELSON ◽  
M. P. STEINBERG
Keyword(s):  
Protein Fraction ◽  
Low Protein ◽  
Density Of Water
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