 หัวเรื่อง:- ผู้เขียน: M. Limpoka, R. Kanchanomai, S. Sirivejpundu, P. Chai-anan สื่อสิ่งพิมพ์:pdf Abstract From the study of the levels of Vitamin A, Beta-carotene, Vitamin E, Vitamins B1and B2 in 197 serum samples of fertile and infertile dairy cows collected from 6 dairy cow raising centers, it is found that there was no significant difference in the levels of Vitamins A, E, and B2 in the serum under study and there should not be any problem about the levels of these vitamins. As for the Vitamins B1 level calculated from the percentage of Thiamine Pyrophosphate Enzyme (TPPE) in problematical groups of dairy cows, it is found deficient in comparison to the normal level reported in humans since there has not been any report of a study of % TPPE in dairy cows. The level of Beta-carotene obtained from this study is questionable. Besides, the level of Beta-carotene differs distinctly in each serum sample including the samples taken from normal dairy cows raised in various regions. The conclusion is that there should be more detailed study on the problems of Vitamin B1 and Beta-carotene in dairy cows. |