Document Detail

Apparent nitrogen digestibility data: AACC-ASTM collaborative study.
MedLine Citation:
PMID:  6746486     Owner:  NLM     Status:  MEDLINE    
Apparent nitrogen digestibility data were obtained from 4 laboratories for 6 protein sources and 2 diet levels, 6 and 10% protein, after a 2-day adaptation period during the AACC-ASTM protein efficiency ratio (PER) and net protein ratio (NPR) collaborative studies. For 5 protein sources fed as 10% of the diet, the interlaboratory variation as measured by coefficient of variation (CV) values was low (1.5-3.5%), indicating high precision of the method. Wheat flour (6% protein diet) had the highest variation and, therefore, the lowest precision (CV of 7.10%). The interlaboratory variation (CV value) for 3 of the 4 laboratories was considerably lower, less than half that for the 4 laboratories. An analysis of variance of apparent nitrogen digestibility data indicated significant (P less than 0.05) effects for the 4-laboratory group due to laboratories and protein diets at both 10 and 6% protein levels, and for the 3-laboratory group at the 10% protein level. The 3-laboratory ANOVA for the 6% diets indicated a significant effect (P less than 0.05) due to diet only.
M L Happich; C E Bodwell; L R Hackler; J G Phillips; P H Derse; J G Elliott; D T Hopkins; G F Parsons; E E Prescher; E S Robaidek
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Publication Detail:
Type:  Journal Article    
Journal Detail:
Title:  Journal - Association of Official Analytical Chemists     Volume:  67     ISSN:  0004-5756     ISO Abbreviation:  J Assoc Off Anal Chem     Publication Date:    1984 May-Jun
Date Detail:
Created Date:  1984-09-04     Completed Date:  1984-09-04     Revised Date:  2003-11-14    
Medline Journal Info:
Nlm Unique ID:  7505559     Medline TA:  J Assoc Off Anal Chem     Country:  UNITED STATES    
Other Details:
Languages:  eng     Pagination:  621-2     Citation Subset:  IM    
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MeSH Terms
Biological Assay
Dietary Proteins / analysis*,  metabolism
Feces / analysis
Nitrogen / metabolism*
Reg. No./Substance:
0/Dietary Proteins; 7727-37-9/Nitrogen

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