Showing papers on "Isoflavones published in 1984"
TL;DR: It is confirmed here that phytoestrogens which are abundant in dietary soya protein are converted by human gastrointestinal flora to this weak estrogen, and that some subjects are unable to either produce or excrete equol despite the challenge of a diet containing soya.
644 citations
TL;DR: Chromatographic investigation of a methanolic extract of white lupin roots has revealed the presence of six new dihydrofurano-and pyrano-substituted isoflavones in roots and leaves of L. albus, presumed to be the precursor of lupisoflavone.
123 citations
TL;DR: The identification by gas chromatography-mass spectrometry of the isoflavonic phytoestrogen daidzein for the first time in human urine is described and the metabolism and effect on reproduction of is oflavones in animals and the possible significance of phy toestrogens in man is discussed.
106 citations
TL;DR: For the first time in a comparative study it is shown that isoflavones and isoflavanones are variable in their activity whereas the is oflavans are moderately active inhibitors of fungal growth.
84 citations
TL;DR: In this article, the main isoflavones responsible for the antioxidative activity in tempeh were deduced to be daidzein and genistein, respectively.
Abstract: Dried tempeh is known to be remarkably stable to lipid oxidation. An isoflavone has been isolated and is considered to be one of the antioxidants in tempeh. However, the true origin of the antioxidative activity of tempeh is still obscure. In this paper, isoflavones and their glucosides in tempeh were analyzed by HPLC, and the liberation of isoflavones from glucosides occurred during fermentation was made clear. The main isoflavones responsible for the antioxidative activity in tempeh were deduced to be daidzein and genistein.
82 citations
TL;DR: A simplified procedure is described for the cleanup and determination of the 5 main plant estrogens in animal feed: coumestrol, genistein, biochanin A, daidzein, and formononetin.
Abstract: A simplified procedure is described for the cleanup and determination of the 5 main plant estrogens in animal feed: coumestrol, genistein, biochanin A, daidzein, and formononetin. The estrogens are extracted with ethanol and purified on a Sep-Pak C18 cartridge. All 5 plant estrogens are separated in an isocratic liquid chromatographic system and quantitated by UV and fluorescence responses. The method is sensitive to about 2.5 ppm coumestrol and 10 ppm of the isoflavones.
50 citations
TL;DR: The CD-1 mouse was found not to respond to these oestrogenic compounds from soya-beans or to diethystilboestrol at levels previously reported to be effective in other strains.
45 citations
Journal Article•
2 citations
01 Jan 1984
1 citations