Normal Cholinesterase Activity in the Erythrocytes of Cattle1

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Fourteen groups of beef and dairy cattle belonging to Clemson College were employed in this experiment. A total of 75 animals were represented with 160 blood samples taken. At least two and usually three or four determinations were conducted on each sample for erythrocyte cholinesterase enzyme activity.

The electrometric method with the stated modifications was the basic method employed in determining the cholinesterase activity. (Michel 1949.)

It appears that variations in ambient temperature have no effect on bovine cholinesterase activity.

The mean for beef cattle was found to be delta pH/hr. 0.4:H and for dairy cattle delta pH/hr. 0.410. Although the dairy cattle mean was slightly lower than the mean of beef cattle, it was not significant at the 5% level of probability.

The mean for the 14 groups of beef and dairy cattle was found to be delta pH/hr. 0.422 with its confidence limits of ± 0.074.

Document Type: Research Article

Publication date: February 1, 1959

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