Results 181 to 190 of about 4,664 (206)

Biosynthesis and Biodegradation of Complex Gallotannins

1999
According to an already classical definition formulated by Freudenberg in 1920,1 plant tannins are divided into condensed tannins (nowadays often referred to as proanthocyanidins), which are derived from C-C linked flavan-3-ol units, and into hydrolyzahle tannins. The latter are characterized by a central polyol moiety (β-D-glucose in most cases) whose
Ruth Niemetz, Joerg U. Niehaus, Georg G. Gross   +2 more
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Pyrethrin and Gallotannin in the Flowers of Peony

Nature, 1962
FROM a light petroleum extract of dried petals of peony (Peonia albiflora Pall.) an oily substance (74.08 per cent C, 9.94 per cent H) was isolated by means of nitromethane extraction. It comprises 0.13 per cent of the dry weight of petals and 18 per cent of light petroleum extracts and shows in the ultraviolet spectral region maxima at 227 and 280 mµ ...
I. CHMIELEWSKA, Z. KASPRZYK
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Determination of Gallotannins in Beer by Gas Chromatography

Proceedings. Annual meeting - American Society of Brewing Chemists, 1971
(1971). Determination of Gallotannins in Beer by Gas Chromatography. Proceedings. Annual meeting - American Society of Brewing Chemists: Vol. 29, Proceedings of the Annual Meeting 1971, pp. 171-182.
Helen Trachman, Leonard T. Saletan
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Gallotannin Determination by Rhodanine Assay

2003
The plant material was extracted as described in Section 2.2.4. The supernatant is designated as supernatant A.
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Ellagi- and gallotannins from Punica granatum heartwood.

Die Pharmazie, 2001
From the heartwood of Punica granatum L., the new 3'-O-methyl-3,4-methylenedioxyellagic acid, as well as eight known ellagitannins and gallotannins have been isolated and characterized. The structures were established by chromatography, chemical degradation and UV spectroscopy and confirmed by MS and NMR spectroscopy.
S A, el-Toumy, M S, Marzouk, H W, Rauwald   +2 more
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736. Gallotannins. Part VI. Turkish gallotannin

Journal of the Chemical Society (Resumed), 1962
R. Armitage, E. Haslam, R. D. Haworth, T. Searle   +3 more
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737. Gallotannins. Part VII. Tara gallotannin

Journal of the Chemical Society (Resumed), 1962
E. Haslam, R. D. Haworth, P. C. Keen
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GALLOTANNIN. XIV. THE ACTION OF YEAST ON GALLOTANNIN

Journal of the American Chemical Society, 1925
M. Nierenstein, C. W. Spiers, C. Hadley
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Gallotannins

2022
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Enzymatic Synthesis of Gallotannins and Related Compounds

1992
The onset of the 20th century marks the period when plant tannins, as many other natural products, became the subject of intense investigations aimed at the elucidation of their chemical structures, properties, and distribution in the Plant Kingdom. Among many researchers of that time, the name of E.
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