INFLUENCE OF TEMPERATURE AND SOLAR RADIATION ON PERSISTENCE OF VITAMIN B12 , THIAMINE, AND BIOTIN IN SEAWATER(1).
Ecologically important concentrations of vitamin B12 and thiamine in charcoal-treated, filter-sterilized seawater stored in the dark at 5, 18, 28, and 37 C generally did not change over a 9-week period, although there was some breakdown of B12 at 37 C. Biotin activity under similar conditions generally increased, indicating its decomposition to more active products. Solutions kept at-20 C had unchanged vitamin activity. B12 and biotin in seawater exposed to sunlight were rapidly destroyed. The course of thiamine destruction in sunlight indicated a breakdown to a stable, biologically active product(s)).
Institute of Marine Resources, University of California, San Diego, La Jolla, California 92037.
A F
AF
Carlucci
Institute of Marine Resources, University of California, San Diego, La Jolla, California 92037.
S B
SB
Silbernagel
Institute of Marine Resources, University of California, San Diego, La Jolla, California 92037.
P M
PM
McNally