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New method for the quality check of food proteins of the maintenance metabolism. 4. Investigation of isolated proteins as well as some protein sources of plant and animal origin

Journal Article:

Abstract

Male adult rats (370 g body weight) were fed on maintenance level (460 kJ ME/kgsup(0,75). In a 10 days preliminary period they received a casein/methionine (95/5) diet supplemented with 10 mg /sup 15/N excess per 0.178 kg metabolic body weight in form of ammonium acetate. Thereafter the animals were put on 8 isonitrogenous diets containing as protein sources casein, soya protein, gelatine, whole-egg, fish meal, pea, wheat and yeast. The /sup 15/N excretion via urine and feces was used to evaluate the dietary proteins for maintenance. /sup 15/N in urine was lowest in animals fed on wheat diet and highest after feeding whole-egg diet. From these data a so called '/sup 15/N excretion biological valence (BV)' was calculated, which indicated the highest quality for wheat and soy protein in meeting the needs of the intermediary maintenance metabolism. On the other hand, dietary protein sources influence the loss of endogenous nitrogen as metabolic fecal nitrogen (MFN). It was found to be lowest in animals fed on diets containing isolated proteins (6 mg MFN/100 g body weight) and highest after feeding protein sources of plant origin with a high content in crude fibre (10 mg MFN/100 g). Both, losses of /sup 15/N  More>>
Authors:
Simon, O; Hernandez, M; Bergner, H [1] 
  1. Humboldt-Universitaet, Berlin (German Democratic Republic). Sektion Tierproduktion und Veterinaermedizin
Publication Date:
Jan 01, 1981
Product Type:
Journal Article
Reference Number:
AIX-13-699389; EDB-82-172507
Resource Relation:
Journal Name: Arch. Tierernaehr.; (German Democratic Republic); Journal Volume: 31:11-12
Subject:
59 BASIC BIOLOGICAL SCIENCES; METABOLISM; TRACER TECHNIQUES; NITROGEN; NITROGEN 15; EXCRETION; PROTEINS; DIGESTION; ACETATES; AMMONIUM COMPOUNDS; BLOOD PLASMA; DIET; FECES; INTESTINES; LABELLED COMPOUNDS; LIVER; MUSCLES; PANCREAS; RATS; TIME DEPENDENCE; URINE; ANIMALS; BIOLOGICAL MATERIALS; BIOLOGICAL WASTES; BLOOD; BODY; BODY FLUIDS; CARBOXYLIC ACID SALTS; CLEARANCE; DIGESTIVE SYSTEM; ELEMENTS; ENDOCRINE GLANDS; GASTROINTESTINAL TRACT; GLANDS; ISOTOPE APPLICATIONS; ISOTOPES; LIGHT NUCLEI; MAMMALS; MATERIALS; NITROGEN ISOTOPES; NONMETALS; NUCLEI; ODD-EVEN NUCLEI; ORGANIC COMPOUNDS; ORGANS; RODENTS; STABLE ISOTOPES; VERTEBRATES; WASTES; 550501* - Metabolism- Tracer Techniques
OSTI ID:
7056151
Country of Origin:
Germany
Language:
German
Other Identifying Numbers:
Journal ID: CODEN: ARTIA
Submitting Site:
HEDB
Size:
Pages: 739-752
Announcement Date:

Journal Article:

Citation Formats

Simon, O, Hernandez, M, and Bergner, H. New method for the quality check of food proteins of the maintenance metabolism. 4. Investigation of isolated proteins as well as some protein sources of plant and animal origin. Germany: N. p., 1981. Web.
Simon, O, Hernandez, M, & Bergner, H. New method for the quality check of food proteins of the maintenance metabolism. 4. Investigation of isolated proteins as well as some protein sources of plant and animal origin. Germany.
Simon, O, Hernandez, M, and Bergner, H. 1981. "New method for the quality check of food proteins of the maintenance metabolism. 4. Investigation of isolated proteins as well as some protein sources of plant and animal origin." Germany.
@misc{etde_7056151,
title = {New method for the quality check of food proteins of the maintenance metabolism. 4. Investigation of isolated proteins as well as some protein sources of plant and animal origin}
author = {Simon, O, Hernandez, M, and Bergner, H}
abstractNote = {Male adult rats (370 g body weight) were fed on maintenance level (460 kJ ME/kgsup(0,75). In a 10 days preliminary period they received a casein/methionine (95/5) diet supplemented with 10 mg /sup 15/N excess per 0.178 kg metabolic body weight in form of ammonium acetate. Thereafter the animals were put on 8 isonitrogenous diets containing as protein sources casein, soya protein, gelatine, whole-egg, fish meal, pea, wheat and yeast. The /sup 15/N excretion via urine and feces was used to evaluate the dietary proteins for maintenance. /sup 15/N in urine was lowest in animals fed on wheat diet and highest after feeding whole-egg diet. From these data a so called '/sup 15/N excretion biological valence (BV)' was calculated, which indicated the highest quality for wheat and soy protein in meeting the needs of the intermediary maintenance metabolism. On the other hand, dietary protein sources influence the loss of endogenous nitrogen as metabolic fecal nitrogen (MFN). It was found to be lowest in animals fed on diets containing isolated proteins (6 mg MFN/100 g body weight) and highest after feeding protein sources of plant origin with a high content in crude fibre (10 mg MFN/100 g). Both, losses of /sup 15/N via urine and via feces were combined in a parameter called 'total BV'. According to this parameter the differences in quality for maintenance were only little between the protein sources tested (casein 100, soy protein 100, pea 99, wheat 99, whole egg 92, fish meal 89, gelatin 89). It was concluded that in the state of maintenance the supply with essential amino acids is not critical and that the supply with dispensable amino acids (or nonspecific nitrogen) is of great importance.}
journal = {Arch. Tierernaehr.; (German Democratic Republic)}
volume = {31:11-12}
journal type = {AC}
place = {Germany}
year = {1981}
month = {Jan}
}