[The content of beta-carotene, vitamin A and ascorbic acid in different tissues of bulls, short-scrotum bulls and oxen of different body weights]. / Untersuchungen über den Gehalt an beta-Carotin, Vitamin A und Ascorbinsäure in verschiedenen Geweben von Bullen, Muchsen und Ochsen unterschiedlicher Körpermasse.

Analyses of the liver of bulls of different age show, that the concentration of beta-carotene in the age of 6 to that of 25 weeks increased only from 0.43 +/- 0.16 to 1.66 +/- 0.27 and that of vitamin A from 11.49 +/- 5.87 to 13.90 +/- 5.21 micrograms/g fresh weight. The concentration of beta-carotene and of vitamin A in the testis of bulls and of short scrotum bulls up to an age of 15 weeks was similar; thereafter the concentration in the short scrotum bulls was higher. At an age of 72 weeks the concentration of vitamin A in the liver of bulls (219.17 +/- 51.86) was higher (p less than 0.01) than in that of the short scrotum bulls (144.11 +/- 27.79) and that of the oxen (135.51 +/- 41.26 micrograms/g fresh weight). Analyses of the concentration of ascorbic acid in 8 different tissues of bulls and short scrotum bulls at 6 various periods show, that the highest values mostly were found in December.

[Content of beta-carotene, vitamin E and ascorbic acid in blood plasma of female calves, cattle, bulls, castrates and ox throughout the course of the year]. / Untersuchungen über den Gehalt an beta-Carotin, Vitamin E und Ascorbinsäure im Blutplasma von weiblichen Kälbern, Kühen, Bullen, Muchsen und Ochsen im Jahresverlauf.

The concentration of beta-carotin, of vitamin E and of ascorbic acid in the plasma of female calves (beginning with an age of 4 weeks), of cows in the 2nd and 5th lactation, of bulls, of short scrotum bulls and of oxes in the course of the year was analysed. The concentration of beta-carotin in the plasma of calves after driving up to pasture increased slower than that of cows. After transition to stable feeding there was a significant decrease in the concentration after 4 weeks. During the period of suckling the concentration of vitamin E in the plasma of calves was low. After transition to pasture the concentration of vitamin E in the plasma of calves increased slower than in that of the cows. The concentration of ascorbic acid in the plasma during the winter was higher than during the summer. There was no influence of experimental cryptorchism or castration on the mentioned values.

[The content of minerals and Fe, Cu and Zn in blood plasma, in erythrocytes and in 10 different tissues of bulls, short scrotum bulls and oxen]. / Untersuchungen über den Gehalt an Mineralstoffen sowie an Fe, Cu und Zn im Blutplasma, in den Erythrozyten und in 10 verschiedenen Geweben von Bullen, Muchsen und Ochsen.

The concentrations of minerals (Ca, Mg, Na, K, total-P) and of trace elements (Fe, Cu, Zn) in the plasma and erythrocytes of bulls, of experimentally induced cryptorchids (Muchsen) and of oxen of the breed Holstein-Friesian and of bulls and cryptorchids of a hybrid breed with a high portion of meat-cattle were investigated. Further the concentrations in various tissues (M. semimembranosus, M. longissimus dorsi, left and right ventricle, liver, kidney, adrenal glands, lung, spleen, testis) in bulls, cryptorchids and oxen of the breed Holstein-Friesian were analyzed. The differences of some concentrations of various elements in some tissues are discussed relative to their genesis and significance.