JDS
HOME HELP FEEDBACK SUBSCRIPTIONS ARCHIVE SEARCH TABLE OF CONTENTS
QUICK SEARCH:   [advanced]


     

Journal of Dairy Science Vol. 59 No. 3 481-490
© 1976 by American Dairy Science Association ®
This Article
Right arrow Full Text (PDF)
Right arrow Alert me when this article is cited
Right arrow Alert me if a correction is posted
Services
Right arrow Similar articles in this journal
Right arrow Alert me to new issues of the journal
Right arrow Download to citation manager
Right arrow reprints & permissions
Citing Articles
Right arrow Citing Articles via Google Scholar
Google Scholar
Right arrow Articles by Coblentz, E.
Right arrow Articles by Dayton, A. D.
Right arrow Search for Related Content
PubMed
Right arrow Articles by Coblentz, E.
Right arrow Articles by Dayton, A. D.

Nutritive Value of Thermoalkali-Processed Soy Materials for Young Calves and Rats1

E. Coblentz2, J. L. Morrill, D. B. Parrish and A. D. Dayton

Departments of Dairy and Poultry Sciences, Biochemistry and Statistics, Kansas State University, Manhattan 66506

ABSTRACT

Thermoalkali-processed soy protein concentrates (experimental soy concentrate) were compared with sodium caseinate and a commercial soy protein concentrate (Promocaf) as protein sources in milk replacers, supplying .75 of the protein in 20%-protein replacers. Week-old Holstein calves were fed the replacers in two 4-wk trials. Average gains of calves fed experimental soy concentrate (processed 5 min at 85 C and pH 10.5), caseinate, and Promocaf replacers were 3.0, 6.6, and 6.6 kg. Calves fed experimental soy concentrate replacers heated for shorter or longer times lost .8 to 3 kg weight during the first 2 wk but gained .6 to 1.7 kg during the, last 2 wk. Occasionally calves had loose feces, mainly during the first 2 wk, with no significant differences between groups. Efficiency with which rats used protein of nonfat, spray-dried, milk-replacer ingredients correlated .96 with growth of calves fed corresponding replacers. Growths and protein efficiency ratios were similar when rats were fed lyophilized, thermoalkali-processed soy products heated for various times up to 1 h at either 85 C and pH 10.5 or 75 C and pH 9. Rats fed the experimental soy concentrate performed satisfactorily; calves, less satisfactorily. The protein efficiency ratio of experimental soy products determined with rats correlated .68 with in vitro protein digestibility, -.60 with soluble nitrogen, and -.59 with trypsin inhibitor activity.

FOOTNOTES

1 Contribution No. 914, Department of Dairy and Poultry Sciences; No. 164, Department of Biochemistry; and No. 241, Department of Statistics. Kansas Agricultural Experiment Station.

2 National Vitamin Products Co., Minneapolis, MN 55406






HOME HELP FEEDBACK SUBSCRIPTIONS ARCHIVE SEARCH TABLE OF CONTENTS
Copyright © 1976 by the American Dairy Science Association ®.