Relationship between Plasma Vitamin A and Liver Vitamin A in Calves Fed a Vitamin A Depletion Ration and Calves Fed Minimum Levels of Vitamin A or Carotene

The Vitamin a Requirement of the Young Pig

“…Rousseau and co-workers quantitized the relationship between the plasma and liver in the dairy calf receiving between 0 and 10 meg./lb. body wt./day (204). This Sobel and co-workers (218) showed that the unsaponifiable fraction of fish liver oil dispersed in water (Dis persing Agent -Tween 20, which is Sorbitan monolaurate polyoxyethylene derivative) produced three times the total vitamin A storage in the liver of rats as the same fraction dissolved in maize oil.…”

Analysis of published and clinical sample data to develop new ranges of liver and blood concentrations of vitamin A for diagnosis of vitamin A deficiency in cattle

“…A literature review harvested paired and unpaired serum/ plasma and liver VA data for individual beef or dairy cattle, or herd data, from studies 13,[26][27][28][29] and one thesis 30 Articles with strongly asymmetrical summary data (e.g., mean and median were statistically unequal, the median was greater than the mean, the skew was significantly different from zero, or the mean minus twice the standard deviation was negative) or that were missing data necessary for evaluating relationships (e.g., correlations between tissues within animals, dam and neonate, or feed and tissue concentrations) were also excluded.…”

The vitamin A requirement of the young pig

“…Rousseau and co-workers quantitized the relationship between the plasma and liver in the dairy calf receiving between 0 and 10 meg./lb. body wt./day (204). This relationship could be described by an equation of the form Y = a + b (log x), Y s plasma cone, and x = liver eonc.…”