Vitamin B12 Content of Kidneys as Determined by Different Bioassay Procedures

Authors

Edmund Wei-Kuang Cheng, Iowa Agricultural Experiment StationFollow
Byron H. Thomas, Iowa Agricultural Experiment StationFollow

Document Type

Research

Abstract

The existence of vitamin B₁₂, often designated the antipernicious anemia or animal protein factor, as another member of the expanding family of vitamins is well established. As implied from its nomenclature, it belongs to the water soluble B-vitamins, but unlike most other vitamins in this group its chemical structure is unknown. Its nutritional importance to man, his monogastric farm animals and his poultry is recognized. For the present, at least, the supply consists primarily of concentrates. It is not to be inferred that crystalline B₁₂ is unavailable. On the contrary, however, the supply is very limited and unitages of activity comparable to those in concentrates are much more costly. Consequently, the supply of crystalline material is limited largely to the pharmaceutical trade whereas the livestock and poultry industries rely principally upon concentrates.

Publication Date

1951

Journal Title

Proceedings of the Iowa Academy of Science

Volume

58

Issue

1

First Page

265

Last Page

274

Copyright

©1951 Iowa Academy of Science, Inc.

Language

en

File Format

application/pdf

Recommended Citation

Cheng, Edmund Wei-Kuang and Thomas, Byron H. (1951) "Vitamin B12 Content of Kidneys as Determined by Different Bioassay Procedures," Proceedings of the Iowa Academy of Science, 58(1), 265-274.
Available at: https://scholarworks.uni.edu/pias/vol58/iss1/30