Results 171 to 180 of about 3,301 (196)
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New hydrolysable tannin from Cibotium barometz.
Zhongguo Zhong yao za zhi = Zhongguo zhongyao zazhi = China journal of Chinese materia medica, 2013To study the chemical constituents from Cibotium batometz.Column chromatograph and HPLC were used to isolate and purify the compound, and the structure was elucidated on the basis of MS and NMR spectroscopic methods.A new phenolic compound, 4-O-caffeoyl-D-glucopyranose, has been isolated from the rhizome of C. barometz.
Nan, Xu +4 more
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Dimeric hydrolysable tannins from melastoma Malabathricum
Phytochemistry, 1992Abstract Three new hydrolysable tannin dimers, malabathrins B, C and D, and 11 known tannins including three dimers (nobotanins B, G and H) and a trimer (nobotanin J), have been isolated from the leaves of Melastoma malabathricum. The structures of new dimers were determined by spectral analysis and chemical correlations with nobotanins B and J.
Takashi Yoshida +4 more
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Differential scanning calorimetry of hydrolysed mangrove tannin
Polymer International, 2000Mangrove-bark-tannin adhesives are potential substitutes for phenol–formaldehyde (PF) wood-bonding adhesives which are derived from petroleum, a finite natural resource. However, mangrove-bark-tannin adhesive exhibits poor adhesive properties, including brittleness, poor wet strength, and poor wood penetration.
S Sowunmi +3 more
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Hydrolysable tannins and proanthocyanidins from green tea
Phytochemistry, 1984Abstract Two hydrolysable tannins were isolated from green tea, and their structures were characterized by chemical and spectral means as 1,4,6-tri- O -galloyl-β- d -glucose and 1- O -galloyl-4,6-(−)-hexahydroxydiphenoyl-β- d -glucose. In addition, a new proanthocyanidin gallate was isolated, together with the known procyanidins B-2, B-4 and C-1 ...
Gen-Ichiro Nonaka +2 more
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Analysis of condensed and hydrolysable tannins from commercial plant extracts
Journal of Pharmaceutical and Biomedical Analysis, 2006High performance liquid chromatography (HPLC)/DAD and MS qualitative and quantitative analyses of polyphenols, hydrolysable and condensed tannins from Pinus maritima L. and tannic acid (TA) extracts were performed using normal and reverse phase. Normal-phase HPLC was more suitable for pine bark (PBE) and tannic acid extracts analysis.
ROMANI, ANNALISA +5 more
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MALDI‐TOF‐CID for the microstructure elucidation of polymeric hydrolysable tannins
Journal of Applied Polymer Science, 2012AbstractHigh molar mass wood tannin extracts are complex mixtures that are distributed in both molar mass and chemical composition. Hydrolysable tannins from tara, Turkey gall, and chestnut woods were analyzed and compared using matrix‐assisted laser desorption/ionization time‐of‐flight (MALDI‐TOF) mass spectrometry.
Radebe, Nonhlanhla +4 more
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Seasonal variation in the content of hydrolysable tannins in leaves of Betula pubescens
Phytochemistry, 2001The contents of 13 hydrolysable tannins in the leaves of white birch (Betula pubescens L.) trees were analysed at twelve stages throughout the growing season. All individual galloylglucoses, from 1-O-galloyl-beta-D-glucopyranose to 1,2,3,4,6-penta-O-galloyl-beta-D-glucopyranose, accumulated in young leaves, while ellagitannins showed significantly ...
J P, Salminen +3 more
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Chemoecology, 2002
We investigated the effects of four chemically characterised galloylglucoses (GGs, a subgroup of hydrolysable tannins) and their hydrolysis product, gallic acid (GA), on consumption and performance of larvae of the autumnal moth Epirrita autumnata. Larvae were fed with birch (Betula pubescens) leaves that had been painted individually with each of the ...
Juha-Pekka Salminen, Kyösti Lempa
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We investigated the effects of four chemically characterised galloylglucoses (GGs, a subgroup of hydrolysable tannins) and their hydrolysis product, gallic acid (GA), on consumption and performance of larvae of the autumnal moth Epirrita autumnata. Larvae were fed with birch (Betula pubescens) leaves that had been painted individually with each of the ...
Juha-Pekka Salminen, Kyösti Lempa
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Scope of Hydrolysable Tannins as Possible Antimicrobial Agent.
Phytotherapy research : PTR, 2017Hydrolysable tannins (HTs) are secondary metabolites from plants, which are roughly classified into gallotannins and ellagitannins having gallic acid and ellagic acid residues respectively attached to the hydroxyl group of glucose by ester linkage.
Sanmuga Priya, Ekambaram +2 more
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Lipid Interactions and Hydrophobic Properties of Hydrolysable Tannins
Planta Medica, 2022V Virtanen, M Karonen
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