Biomedical subjects

H J Kohne

Publications and source records attributed to H J Kohne.

4 recordsLinked to original sources

PubMed1976

The relationship of circulating levels of estrogens, corticosterone and calcium to production performance of adult turkey hens under conditions of increasing ambient temperature.

Turkey hens were exposed to stepwise increases in ambient temperature from 21degreesC. to 25degreesC. to 30degreesC. to 35degreesC. at two-week intervals. Dietary calcium levels of 1.54, 2.01 and 2.48% were fed. Production data and circulating levels of estrone, estradiol-17-beta, corticosterone, total calcium, bound calcium, and unbound calcium were studied. The dietary calcium levels had no significant influence on any of the results. The temperature increase caused a significant (P less than .05) decrease in plasma levels of calcium and estrone, egg production, shell thickness and egg weight. The temperature increase caused a significant (P less than .05) fluctuation in plasma corticosterone levels but had no apparent effect on the plasma estradiol levels. With the temperature increase, unbound plasma calcium levels and plasma corticosterone levels showed a significant (R greater than or equal to 0.50, P less than 0. less than .01) positive correlation to egg production.

Animals↗

PubMed1975

Blood parameters in Leucocytozoon smithi infected poults fed clopidol.

Poults naturally infected with L. smithi demonstrated a significant (P less than 0.01) decrease in arterial PO2 (mm. Hg) during the second and third weeks after exposure to black fly bites. Poults fed Clopidol (0.0125%) during the exposure period and subsequent experimental periods showed very little parasitemia and no significant reduction in arterial PO2.

Animals↗

PubMed1975

Changes in plasma electrolytes, acid-base balance and other physiological parameters of adult female turkeys under conditions of acute hyperthermia.

The effects of acute hyperthermia on certain physiological parameters of turkey hens was studied. It was found that the response of the turkey to hyperthermia is similar to the reported response of the chicken. The birds began panting and the average body temperature increased 0.1 degrees C. as the ambient temperature reached 32 degrees C. The panting or polypnea induced a profound respiratory alkalosis in the turkeys. The acute hyperthermia also caused a significant (P less than 0.05) decrease in plasma levels of sodium, total calcium, magnesium and inorganic phosphorus. The plasma level of potassium was significantly (P less than 0.05) increased.

Acid-Base Equilibrium↗

PubMed1975

Acid-base balance, plasma electrolytes and production performance of adult turkey hens under conditions of increasing ambient temperature.

Turkey hens were exposed to stepwise increases in ambient temperature from 21 degrees C. to 25 degrees C. to 30 degrees C. to 35 degrees C. at two-week intervals. Dietary calcium levels to 1.54, 2.01 and 2.48 percent were fed. Acid-base balance, plasma electrolytes and production performance were studied. The temperature increase caused a significant (P less than 0.05) decrease in plasma sodium, calcium, and magnesium, and in egg production, shell thickness and egg weight and a significant (P less than 0.05) increase in plasma potassium. There was no significant change in the acid-base balance of the blood as measured by blood PO2, PCO2 and pH. Egg production was not significantly correlated to blood gas activitelated to plasma calcium and magnesium levels. Dietary calcium levels had no influence on the parameters measured.

Acid-Base Equilibrium↗