文章基本信息

标题：Characterization of Corrinoid Compounds in the Edible Cyanobacterium Nostoc flagelliforme the Hair Vegetable
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作者：Fei Teng ; Tomohiro Bito ; Shigeo Takenaka 等
期刊名称：Food and Nutrition Sciences
印刷版ISSN：2157-944X
电子版ISSN：2157-9458
出版年度：2014
卷号：5
期号：4
页码：334-340
DOI：10.4236/fns.2014.54040
出版社：Scientific Research Publishing
摘要：Vitamin B12 contents in the edible cyanobacterium Nostoc flagelliforme, also known as hair vegetable, were assayed using a microbiological method. We detected high vitamin B12 contents in samples of naturally grown cells (109.2 ± 18.5 μg/100g dry weight) and cultured cells (120.2 ± 53.6 μg/100g dry weight). However, commercially available hair vegetable samples, which comprised fake substitutes and Nostoc, had variable contents (4.8 - 101.6 μg/100g dry weight) because concomitant fake items contain very low vitamin B12 contents. To evaluate whether natural and cultured N. flagelliforme samples contained vitamin B12 or pseudovitamin B12, corrinoid compounds were purified and identified as pseudovitamin B12 (approximately 72%) and vitamin B12 (approximately 28%) using silica gel 60 TLC bioautography and LC/MS. The results suggested that N. flagelliforme contains substantial amounts of pseudovitamin B12, which is inactive in humans.
关键词：Edible Cyanobacteria; Hair Vegetable; Nostoc flagelliforme; Pseudovitamin B12; Vitamin B12