HOME HELP FEEDBACK SUBSCRIPTIONS ARCHIVE SEARCH TABLE OF CONTENTS		QUICK SEARCH:   [advanced] Author: Keyword(s): Year:  Vol:  Page:

This Article Full Text (PDF) Alert me when this article is cited Alert me if a correction is posted Services Similar articles in this journal Alert me to new issues of the journal Download to citation manager Citing Articles Citing Articles via Google Scholar Google Scholar Articles by Ross, R. H. Articles by Guerrnat, N. B. Search for Related Content PubMed Articles by Ross, R. H. Articles by Guerrnat, N. B.

The Utilization of ß-Carotene, Vitamin A Alcohol, and the Natural Ester of Vitamin a by Holstein Heifers^1,2,3

Departments of Dairy Husbandry and Agricultural and Biological Chemistry, Pennsylvania Agricultural Experiment Station, State College

ABSTRACT

Conclusions:

1. The critical blood plasma vitamin A concentration was found to be 6 to 8 per ³ 100 ml. blood plasma for Holstein heifers when gains in body weight were used as the criterion.
   
2. There was no significant difference in the efficiency of utilization of vitamin A alcohol and the natural esters of vitamin A by Holstein heifers when the blood plasma concentration of vitamin A was used as a criterion. However, both forms of vitamin A were utilized more efficiently than ß-carotene.
   

¹ Authorized for publication on October 2, 1947, as Paper no. 1395 in the Journal Series of the Pennsylvania Agricultural Experiment Station.

² The data contained in this paper are from a thesis submitted by the senior author to the Graduate School of The Pennsylvania State College in partial fulfillment of the requirements for the degree of Doctor of Philosophy, 1947.

³ This work was supported in part by The Borden Company, New York, N. Y.

⁴ Now associated with the University of Idaho, Moscow.