The production of gluconic acid by the penicillium luteum-purpurogenum group. II. Some optimal conditions for acid formation

✍ Scribed by Horace T. Herrick; Orville E. May

• Publisher: Elsevier Science
• Year: 1928
• Tongue: English
• Weight: 98 KB
• Volume: 206
• Category: Article
• ISSN: 0016-0032
• DOI: 10.1016/s0016-0032(28)90752-8

✦ Synopsis

FRESH Chesapeake oysters were frozen, ground, and fed to albino rats. The experiment showed that oysters are a good source of vitamins A, B, and D.

Two grams (0.32 gram on a dry basis) of oysters furnished sufficient vitamin A to cure rats of xerophthalmia. Tests made by the curative method showed that 3.5 grams (o.56 gram dry basis) of oysters contained nearly enough vitamin B to supply the needs of young rats. For long-continued normal growth, however, a little more than 5 grams (o.8 gram dry basis) was required. Five grams of oysters given to rachitic rats daily for IO days induced slight calcification of the long bones, comparable with that produced in the same length of time by 6 rag. of good cod liver oil. The same quantity of oysters induced about half calcification in 15 days and complete calcification of the rachitic metaphyses in 20 days.

Oysters were found deficient in the factor required for reproduction and rearing of young.

Dehydration at 4 °o C. under reduced pressure (Io to 15 ram.) inactivated vitamins A and B in oysters.