Provitamin A and Vitamin C in Salted Nozawa-na

概要

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The common scarcity of vegetables, especially of leafy ones in winter season makes it important to investigate the convenient sources of vitamin A and C during this season. The growing of the leafy vegetable Nozawa-na (a variety of Brassica Rapa LINN.) is practiced in the central mountaineous region of Japan in autumn, and then they are salted down for use during the non-growing winter season. There are two kinds of salted Nozawa-na, that of light brine for winter use, and heavier one for later use.<BR>In order to estimate the food value as sources of vitamin A and C, these salted Nozawa-na were compared on their nutrient contents. In results, it was recognized that a great portion of vitamin C in two types of salted Nozawa-na was transformed to dehydro-ascorbic acid and other oxidized products, and the average of provitamin A content was 2, 760 I. U. for total carotene and 830 I. U. for β-carotene in 100 g.
公益社団法人日本栄養・食糧学会の論文