EFFECT OF p-AMINOBENZOIC ACID ON THE MICROBIOLOGICAL ASSAY FOR NICOTINIC ACID
نویسندگان
چکیده
منابع مشابه
A MICROBIOLOGICAL ASSAY METHOD FOR p-AMINOBENZOIC ACID
Since the eshablishment of p-aminobenzoic acid as a member of the B vitamin group, a considerable interest has been shown in methods of determination in natural materials. Since known chemical methods are not sufficiently sensitive, it became evident that microbiological tests should be the most practicable. The organism Clostridium acetobutylicum has been used (I) but no general assay procedur...
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چکیده ندارد.
15 صفحه اولThe Microbiological Assay of Riboflavin and Nicotinic Acid in Urine.
a time similar assay methods were used to assess their concentrations in various types of materials. Such methods are time-consuming, require specialized experience, and are not particularly sensitive or accurate. Chemical methods which were developed later still lack sensitivity and are subject to inaccuracies owing to the necessity of a number of manipulations to remove interfering substances...
متن کاملThe Microbiological Determination of Nicotinic Acid, Nicotinamide, and Nicotinuric Acid
The nicotinic acid assay most generally satisfactory is the Lactobacillus arabinosus procedure (1, 2) as regards sensitivity and non-interference from other compounds. However, this organism responds to nicotinamide and nicotinuric acid as well as to nicotinic acid. Gaines and Stahly (3) have proposed the use of Leuconostoc mesenteroides for the assay of several members of the vitamin B complex...
متن کاملSeparation of p-Aminobenzoic Acid Derivatives
According to the literature, p-aminobenzoic acid (PAB) is excreted in the urine mostly as the free acid and its N-acetyl derivative; the remaining part is eliminated conjugated with glucuronic acid and as p-aminohippuric acid (PAH) (Ellinger & Hensel, 1914'; Hensel, 1914; Cohen & McGilvery, 1946; Salassa, Bollman & Dry, 1948). There is no agreement concerning the formation of PAH. Thus, Beyer, ...
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ژورنال
عنوان ژورنال: Journal of Biological Chemistry
سال: 1942
ISSN: 0021-9258
DOI: 10.1016/s0021-9258(18)72546-5