Article
Estudos sobre a dosagem microbiologica das vitaminas do complexo B - II. Niacina
Microbiological assay for niacine
Registro en:
VILLELA, Gilberto G.; HARGRAVES, Alberto B. Estudos sobre a dosagem microbiologica das vitaminas do complexo B - II. Niacina. Memórias do Instituto Oswaldo Cruz, Rio de Janeiro, v. 42, n. 1, p. 1 -8, 1945.
0074-0206
10.1590/S0074-02761945000100013
1678-8060
Autor
Villela, Gilberto G.
Hargraves, Alberto B.
Resumen
The microbiological assay method of Snell and Wright for niacine was studied and some modifications of the basal medium were proposed. A maximal growth of the "Lactobacillus arabinosus" was obtained by the addition to the basal medium of 25 mg % asparagine and increasing the percentages of glucose and sodium acetate. Liver and yeast extracts were assayed satisfactory and the niacine added was recovered quantitatively.