scholarly journals Nutritive value of proteins of pearl millet of high-yielding varieties and hybrids

1969 ◽  
Vol 23 (4) ◽  
pp. 913-916 ◽  
Author(s):  
A. K Goswami ◽  
K. P Sharma ◽  
K. L SEHGAL
Keyword(s):  
Pearl Millet ◽  
Dietary Protein ◽  
Nutritive Value ◽  
Protein Efficiency Ratio ◽  
Optimum Level ◽  
Lysine Content ◽  
Efficiency Ratio ◽  
Reference Protein ◽  
Limiting Amino Acid ◽  
High Yielding Varieties

1. Two high-yielding varieties and three hybrids of pearl millet were evaluated for their chemical composition and protein efficiency ratio (PER) for rats at a level of 6.38% dietary protein. PER values ranged from 0.94 to 1.21 and were significantly different.2. Tryptophan contents of the proteins were above the optimum level of the FAO reference protein. Lysine content was deficient in all the samples and was probably the limiting amino acid in the PER test.

scholarly journals The relationship between nutritive value of dietary protein and activity of liver arginase and kidney transamidinase enzymes

1967 ◽  
Vol 21 (1) ◽  
pp. 29-36 ◽  
Author(s):  
E. A. Kean
Keyword(s):  
Dietary Protein ◽  
Inverse Relationship ◽  
Nutritive Value ◽  
Protein Efficiency Ratio ◽  
Physiological Function ◽  
Arginase Activity ◽  
Efficiency Ratio ◽  
Protein Sources ◽  
The Relationship

1. The protein efficiency ratio of three protein sources was determined with rats by a depletion-repletion method. The sources were: a groundnut product, a methionine-supplemented groundnut product and lactalbumin.2. Livers obtained from the test animals were assayed for arginase activity, and kidneys for transamidinase activity (glycine amidinotransferase).3. The measurements indicated that there was an inverse relationship between arginase activity and the nutritive value of the dietary protein.4. Transamidinase activity was also influenced by nutritive value. Only the unsupplemented groundnut product, which had the lowest nutritive value, failed to produce a significant increase of transamidinase activity over basal levels.5. The findings are discussed from the standpoint of physiological function and needs. It is suggested that observed levels of arginase activity are not necessarily related to amounts of urea excreted; similarly, transamidinase activity may be well in excess of physiological requirements.

scholarly journals Effect of dietary protein level, and an anabolic steroid, ethylestrenol, on the growth, food conversion efficiency and protein efficiency ratio of rainbow trout (Salmo gairdneri)

1982 ◽  
Vol 47 (3) ◽  
pp. 615-624 ◽  
Author(s):  
B. W. Ince ◽  
K. P. Lone ◽  
A. J. Matty
Keyword(s):  
Rainbow Trout ◽  
G Protein ◽  
Anabolic Steroid ◽  
Dietary Protein ◽  
Protein Efficiency Ratio ◽  
Salmo Gairdneri ◽  
Food Conversion ◽  
Efficiency Ratio ◽  
Dietary Protein Level ◽  
Food Conversion Efficiency

1. Three isoenergetic test diets containing 320, 430 and 530 g protein/kg, with (experimental) and without (control) inclusion of an anabolic steroid, ethylestrenol, were given to rainbow trout (Salmo gairdneri) of mean initial weight 27 g, for 60 d.2. After 60 d, all trout groups were given an identical, steroid-free, commercial diet (410 g protein/kg) for a further 30 d, to observe withdrawal effects on growth.3. The weight and length of trout given the 430 and 530 g protein/kg control diets were significantly greater after 60 d than those given the 320 g protein/kg control diet.4. Inclusion of steroid enhanced the weight and length of trout given the 320 and 430 g protein/kg experimental diets, exerting a preferential effect on weight as opposed to length.5. After steroid withdrawal, a significant difference between the weight and length of the 320 g protein/kg control and experimental groups was still apparent.6. An increase in dietary protein increased the food conversion efficiency, and decreased the protein efficiency ratio. Inclusion of steroid increased both these factors over the respective controls.7. Protein assimilation decreased, and faecal nitrogen content increased with increasing dietary protein. In trout given steroid, protein assimilation and apparent digestibility was higher, and facecal N content, lower than the controls.8. Muscle protein increased with increasing dietary protein, and was higher in trout given steroid.9. Relative liver weight increased with increasing dietary protein. Inclusion of steroid resulted in a reduction in relative liver and gut weight, and an increase in kidney weight.10. It is concluded that ethylestrenol promotes both the growth and efficiency of nutrient utilization of trout. The magnitude and duration of these effects are a function of the dietary protein level.

Assessment of Rat Growth Methods for Estimating Protein Quality: Interlaboratory Study

1980 ◽  
Vol 63 (3) ◽  
pp. 462-467 ◽  
Author(s):  
J Murray Mclaughlan ◽  
G Harvey Anderson ◽  
L Ross Hackler ◽  
Douglas C Hill ◽  
G Richard Jansen ◽  
...  
Keyword(s):  
Protein Efficiency Ratio ◽  
Protein Quality ◽  
Interlaboratory Study ◽  
Official Method ◽  
Efficiency Ratio ◽  
Protein Ratio ◽  
Reference Protein ◽  
Rat Growth ◽  
Growth Methods ◽  
Net Protein

Abstract An interlaboratory study involving protein efficiency ratio (PER), net protein ratio (NPR), relative NPR (RNPR) and relative nitrogen utilization (RNU) was carried out. Six collaborators assayed 6 samples, including casein plus methionine which was used as a reference protein. Collaborators prepared their own diets and analyzed the diets for nitrogen. Test proteins were added at the 8% level (N × 6.25). PER values varied more than NPR values which varied more than either RNPR or RNU. RNU and RNPR produced almost identical values, but RNPR remains the official method of choice, because it is a well established method.

scholarly journals The protein quality of meat meals as assayed with the rat and with Streptococcus zymogenes

1968 ◽  
Vol 22 (1) ◽  
pp. 129-131 ◽  
Author(s):  
R. Ferrando ◽  
Nicole Henry ◽  
P. Larvor
Keyword(s):  
Correlation Coefficient ◽  
Nutritive Value ◽  
Protein Efficiency Ratio ◽  
Protein Quality ◽  
Efficiency Ratio ◽  
Meat Meal ◽  
Relative Nutritive Value

1. Seven samples of meat meal have been assayed with rats by the protein efficiency ratio (PER) test and with Streptococcus zymogenes by Ford's (1960) ‘relative nutritive value’ (RNV) test.2. A correlation coefficient of r = + 0·895 was obtained for the results from the two series of tests.

scholarly journals The preparation of nutritious protein from wool

1970 ◽  
Vol 24 (3) ◽  
pp. 717-725 ◽  
Author(s):  
F. B. Shorland ◽  
Judith M. Gray
Keyword(s):  
Amino Acids ◽  
G Protein ◽  
Nutritive Value ◽  
Protein Efficiency Ratio ◽  
Essential Amino Acids ◽  
Sodium Sulphide ◽  
Efficiency Ratio ◽  
Weanling Rats ◽  
Tryptophan Content ◽  
Methionine Content

1. The nutritive value of solubilized wool protein prepared by dissolving finely ground wool in sodium sulphide-sodium sulphite solution followed by precipitation with 40 % acetic acid has been tested by incorporating it into protein-free diets containing the amounts of vitamins and minerals required by weanling rats.2. At the level of 10 % (w/w) of the diet, solubilized wool protein failed to support growth in weanling rats, but when the diet was fortified with histidine, methionine and lysine a protein efficiency ratio of up to 1.8 was obtained. The effect of the addition of lysine was marginal. Similar results were obtained with solubilized wool protein prepared from dyed wool suiting material.3. Apart from the methionine content, which varied from 0.49 to 0.66 g/100 g protein, the contents of the essential amino acids in the solubilized wool protein generally met the requirement of the FA0 (1957) provisional pattern, although in many of the preparations the levels of isoleucine and lysine were marginal. The tryptophan content was not determined. Supplementation of the solubilized wool protein with lysine to the level of 6–10 g/100 g protein slightly enhanced the nutritive value.

scholarly journals Growth performance and haematological traits of Nigerian local chickens fed varied dietary protein levels

2021 ◽  
Vol 43 (2) ◽  
pp. 332-342
Author(s):  
V. U. Oleforuh-Okoleh, ◽  
I. J. Nte ◽  
Q. Onyegbule
Keyword(s):  
Blood Cell ◽  
Growth Performance ◽  
Dietary Protein ◽  
Protein Level ◽  
Protein Efficiency Ratio ◽  
Efficiency Ratio ◽  
Feeding Trial ◽  
Protein Levels ◽  
Dietary Protein Level ◽  
Local Chickens

This study was carried out to investigate the growth performance and haematological traits of Nigerian local chickens (NLC) fed varied dietary protein levels. An eleven week feeding trial was done in a 3 x 2 factorial arrangement using six treatment groups comprising a combination of two genotypes of the NLC identified as normal feather (na) and naked neck (Na) and three dietary protein levels - high protein: HP (22% and 20% CP chick mash and grower mash respectively), medium protein: MP (20% and 18% chick mash and grower mash respectively) and low protein: LP (18% and 16% chick mash and grower mash). Data were collected on growth performance traits (body weight, feed intake, feed conversion ratio and protein efficiency ratio). At the end of the feeding trial a haematological assay was done. Neither genotype nor interaction of genotype and dietary protein level influenced (p>0.05) any of the growth performance traits studied. Birds on HP ate 10.21% and 7.09% less feed than those on MP and LP respectively. A better (p<0.05) protein efficiency ratio (up to 20.79%) was observed in birds fed LP. Na birds had 4.55% and 17.50x103 L-1 more packed cell volume and platelets respectively than na birds (p<0.05). All haematological traits studied, except white blood cell count, showed significant variations (p<0.05) due to varied dietary protein levels. Higher haemoglobin, red blood cell counts, mean corpuscular haemoglobin concentration and platelets were observed in birds fed LP diet. Reducing the dietary protein level had no adverse effect on the NLC thus, the LP diet is recommended for raising the Nigerian local chicken.

EVALUATION OF PROTEIN IN FOODS: VI. FURTHER FACTORS INFLUENCING THE PROTEIN EFFICIENCY RATIO OF FOODS

1960 ◽  
Vol 38 (1) ◽  
pp. 865-869
Author(s):  
E. J. Middleton ◽  
A. B. Morrison ◽  
J. A. Campbell
Keyword(s):  
Protein Synthesis ◽  
Nutritive Value ◽  
Protein Efficiency Ratio ◽  
Plant Protein ◽  
Plant Proteins ◽  
Efficiency Ratio ◽  
Factors Influencing ◽  
Rat Growth ◽  
Growth Assay ◽  
Valid Estimate

Diets containing two levels of protein (10 and 15%) and two levels of fat (10 and 20%) were tested in all possible combinations in a 4-week rat growth assay. Protein was supplied by casein or a mixture of plant proteins. The protein efficiency ratio (P.E.R.) for casein found with a diet containing 10% protein and 10% fat was slightly greater than that found with a diet containing 15% protein and 20% fat, approximating the levels found in the "average" Canadian diet. The value for plant protein was similar under both conditions. Efficiency of carcass protein synthesis was much greater in animals fed casein than in those fed plant protein. With both sources of protein, the efficiency of carcass protein synthesis was similar with diets containing 10% protein and 10% fat to those with 15% protein and 20% fat.In additional studies, no effect of Chlortetracycline or source of carbohydrate on P.E.R. of casein was observed.It was concluded that P.E.R. determinations carried out on a 10% protein diet furnish a valid estimate of the nutritive value of protein and have several practical advantages.

EVALUATION OF PROTEIN IN FOODS: VI. FURTHER FACTORS INFLUENCING THE PROTEIN EFFICIENCY RATIO OF FOODS

1960 ◽  
Vol 38 (8) ◽  
pp. 865-869 ◽  
Author(s):  
E. J. Middleton ◽  
A. B. Morrison ◽  
J. A. Campbell
Keyword(s):  
Protein Synthesis ◽  
Nutritive Value ◽  
Protein Efficiency Ratio ◽  
Plant Protein ◽  
Plant Proteins ◽  
Efficiency Ratio ◽  
Factors Influencing ◽  
Rat Growth ◽  
Growth Assay ◽  
Valid Estimate

Diets containing two levels of protein (10 and 15%) and two levels of fat (10 and 20%) were tested in all possible combinations in a 4-week rat growth assay. Protein was supplied by casein or a mixture of plant proteins. The protein efficiency ratio (P.E.R.) for casein found with a diet containing 10% protein and 10% fat was slightly greater than that found with a diet containing 15% protein and 20% fat, approximating the levels found in the "average" Canadian diet. The value for plant protein was similar under both conditions. Efficiency of carcass protein synthesis was much greater in animals fed casein than in those fed plant protein. With both sources of protein, the efficiency of carcass protein synthesis was similar with diets containing 10% protein and 10% fat to those with 15% protein and 20% fat.In additional studies, no effect of Chlortetracycline or source of carbohydrate on P.E.R. of casein was observed.It was concluded that P.E.R. determinations carried out on a 10% protein diet furnish a valid estimate of the nutritive value of protein and have several practical advantages.

scholarly journals Utilization Of Rubber Seed Meal As A Protein Supplement In Broiler Finisher Rations.

2021 ◽  
Vol 17 ◽  
pp. 23-28
Author(s):  
I. O. A. Adeleye ◽  
A. A. Odunsi
Keyword(s):  
Feed Efficiency ◽  
Protein Efficiency Ratio ◽  
Control Diet ◽  
Seed Meal ◽  
Broiler Chicks ◽  
Efficiency Ratio ◽  
Feeding Trial ◽  
Rubber Seed ◽  
Reference Protein ◽  
Different Levels

A feeding trial was conducted to evaluate the performance of finisher broiler chicks fed diets containing different levels of partially defatted rubber seed meal as a replacement for roundnut cake. Four isocaloric and iso-nitrogenous diets (A, B, C and D) were formulated using groundnut cake (GNC) as the reference protein source; and 10, 15 and 20% of the GNC in the control diet (A) were replaced with rubber seed meal (RSM) in rations B, C and D, respectively. No significant differences (P>0.05) were observed in feed intake, growth rate, feed efficiency and protein efficiency ratio among the birds on the different diets. However, the dressed weight and dressing percentage and total edible meat to bone ratio showed significant (P <0.05) differences. The results indicated that replacement of GNC with RSM at levels studied, did not significantly depress the performance of broiler finishers but was quiteeneficial in terms of economics of production.

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