1989, Cilt 5, Sayı 1, Sayfa(lar) 209-217
Determination of vitamin A and ß-carotene levels in plasma of dairy cows
Mehmet NİZAMLIOĞLU1, Ahmet ACET2, Ramazan KADAK3, Ali Muhtar TİFTİK4 Bünyamin TRAŞ5
1Doç Dr., S. Ü. Veteriner Fakültesi Biyokimya Anabilim Dalı, Konya
2Doç. Dr., S, P. Veteriner Fakültesi Farmakoloji Anabilim Dalı, Konya
3Dr., Hayvancılık Merkez Araştırma Enstitüsü, Konya
4Arş.. Gör., S. Ü. Veteriner Fakültesi Biyokimya Anabilim Dalı, Konya
5Arş. Gör., S. Ü. Veteriner Fakültesi Farmakoloji Anabilim Dalı, Konya
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The aim of this present study was to investigate the coversion of ß-carotene to vitamin A by measuring plasma vitamin A and ß3-carotene in dairy cows.

In this study, a total of 14 Brown-Swiss Cows, in 4-6 years old, supplied by Konya Animal Research Centre, were, used as materials. Animals were diveded into two equal groups. Group1; control group. Group 2; supplemented with ß-carotene (1 gr/day/each cow).

Blood was sampled weekly from the animals during the experimental period of 5 weeks.

ß-carotene and vitamin A levels in the blood samples were assayed by using HPLC.

In group 2, plasma vitamin A and ß-carotene levels were increased statistically significant (P < 0.0,1, P<0.05).

As a conclusion, it will be useful to supplement ß-carotene in dairy cows when the plasma ß-carotene and vitamin A are low.