Determination of vitamins D, A, and E in sera and vitamin D in milk from captive and free‐ranging polar bears (Ursus maritimus), and 7‐dehydrocholesterol levels in skin from captive polar bears

@inproceedings{Kenny1998DeterminationOV,
  title={Determination of vitamins D, A, and E in sera and vitamin D in milk from captive and free‐ranging polar bears (Ursus maritimus), and 7‐dehydrocholesterol levels in skin from captive polar bears},
  author={David E. Kenny and N. A. Irlbeck and Tai Chih Chen and Zhiren Lu and Michael Francis Holick},
  year={1998}
}
The difference between serum levels from 36 captive and 56 free-ranging polar bears (Ursus maritimus) for 25-hydroxyvitamin D (25-OH-D) was found not to be significant (mean ± SD = 348 ± 215 nmol/L [captive], 360 ± 135 nmol/L [free-ranging], t = 0.30, df = 52.8, P = 0.76), whereas the difference for retinol and α-tocopherol was significant (retinol, 1.37 ± 0.67 μmol/L [captive] 1.89 ± 0.63 μmol/L [free-ranging], t = 3.88, df = 72.4, P <0.001, α-tocopherol, 18.56 ± 18.56 μmol/L [captive], 48.76… CONTINUE READING