Journal ArticleDOI
TLC determination of tannins and flavonoids in extracts from some Erodium species using chemically modified stationary phases
Izabela Fecka,Wojciech Cisowski +1 more
TLDR
In this paper, the distribution of tannins and flavonoids in E. cicutarium, E. manescavi, and E. pelargoniiflorum were examined by TLC on unmodified silica gel.Abstract:
Natural phenolic compounds, e.g. ellagitannins, gallotannins, and flavonoid glycosides, from the aerial parts of Erodium cicutarium ( Geraniaceae ) have been isolated and identified. The structures of these compounds were determined by conventional methods of analysis and confirmed by MS and NMR spectral analysis. The distribution of tannins and flavonoids in E. ciconium, E. cicutarium, E. manescavi , and E. pelargoniiflorum were examined by TLC on unmodified silica gel and on silica gel chemically modified with polar and nonpolar groups (HPTLC Si 60, HPTLC Si 60 LiChrospher, HPTLC diol, HPTLC CN, and HPTLC RP-18W).read more
Citations
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Journal ArticleDOI
Analysis of Some Natural Antioxidants by Thin‐Layer Chromatography and High Performance Thin‐Layer Chromatography
TL;DR: The (HP)TLC has many advantages, such as lower costs, short time analysis, the possibility of multiple detection, and specific derivatization on the same plate, etc as discussed by the authors.
Journal ArticleDOI
Microwave-assisted synthesis of polyamine-functionalized carbon dots from xylan and their use for the detection of tannic acid
TL;DR: The low-cost and excellent BPEI-CDs are potential suitable for TA detection in practical application and can be successfully applied to detect TA in real lake water and white wine samples, suggesting the low- cost and excellent beryllium-functionalized carbon dots can be used as novel fluorescent probes for detecting tannic acid sensitively and selectively.
Journal ArticleDOI
Electrochemical oxidation of luteolin at a glassy carbon electrode and its application in pharmaceutical analysis.
TL;DR: The results indicated the well-defined redox peak of luteolin which was involving two electrons and two protons was observed and the electrode process is adsorption-controlled and the charge transfer coefficient (alpha) was calculated as 0.66.
Journal ArticleDOI
In vitro antioxidant and anti-inflammatory activities of extracts from Potentilla recta and its main ellagitannin, agrimoniin.
TL;DR: The strong scavenging activity against H2O2, and the inhibition of the enzymatic activity of lipoxidase, and particularly, hyaluronidase observed for the tested subfractions and agrimoniin, partly explain the beneficial effects of P. recta in treatment of skin inflammation.
Journal ArticleDOI
High-performance thin-layer chromatography method for quantitative determination of oenothein B and quercetin glucuronide in aqueous extract of Epilobii angustifolii herba.
TL;DR: The HPTLC-densitometry method was found to be relatively simple, specific, precise and accurate for the quality control of Epilobium angustifolium extracts.
References
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Book ChapterDOI
Chemotaxonomie der Pflanzen
TL;DR: In this article, drei verschiedene Indices anzufertigen: (1) Taxonomic Index, (2) Subject Index, and (3) Chemotaxonomie-index.
Journal ArticleDOI
Effects of the Interaction of Tannins with Co-existing Substances. VI. : Effects of Tannins and Related Polyphenols on Superoxide Anion Radical, and on 1, 1-Diphenyl-2-picrylhydrazyl Radical
Tsutomu Hatano,Rei Edamatsu,Midori Hiramatsu,Akitane Mori,Yuzaburo Fujita,Taeko Yasuhara,Takashi Yoshida,Takuo Okuda +7 more
TL;DR: The scavenging effects of twenty-five tannins including low-molecular polyphenols on the superoxide anion radical (O2-) generated in the hypoxanthine-xanthine oxidase system were estimated by electron spin resonance (ESR) measurements of the adducts formed by 5, 5-dimethyl-1-pyrroline-Noxide (DMPO) and the radical as discussed by the authors.
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Studies on the activities of tannins and related compounds from medicinal plants and drugs. I. Inhibitory effects on lipid peroxidation in mitochondria and microsomes of liver.
TL;DR: Some monomeric polyphenols, represented by (-)-epigallocatechin gallate, showed inhibitory effects stronger than those of the condensed tannins in these systems, particularly on the lipid peroxidation induced by ADP and NADPH.
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Ellagitannins as active constituents of medicinal plants.
TL;DR: Other biological activities, i.e., inhibition of mutagenicity of carcinogens, inhibition of tumor promotion, etc., have been found for tannins including ellagitannins, and the radical-scavenging activities of tannin activities have been supported by the ESR spectral measurements.
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