Topic
Polygonum
About: Polygonum is a research topic. Over the lifetime, 1230 publications have been published within this topic receiving 12765 citations.
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TL;DR: The anthraquinone content of 15 Polygonum multiflorum samples, which from 12 different regions of Yunnan Province, was determined and showed the difference of the anthraquone content is obvious.
Abstract: The anthraquinone content of 15 Polygonum multiflorum samples,which from 12 different regions of Yunnan Province,was determined.The result showed the difference of the anthraquinone content in these samples is obvious.So,the quality of the medicinal materials from Polygonum multiflorum in differert regions is not similar,which have a guide purport on reliable recognizing and estimating the quality of polygonum multiflorum of yunnan.
2 citations
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TL;DR: In this paper, the authors focused on the structural elucidation of pure compounds from the extract and fractions of Polygonum multiflorum through silica gel column chromatography, which led to the isolation of one new naphthoquinone and eight known compounds.
Abstract: Objective: This research is mainly focused towards isolation and structural elucidation of pure compounds from the extract and fractions of Polygonum multiflorum through silica gel column chromatography. Methods: The air dried rhizomes were extracted with Me 2 CO (acetone), MeOH (methanol) and H 2 O (water). The Me 2 CO extract was fractionated into CHCl 3 (chloroform) and residue. The chloroform-soluble portion and MeOH extract were subjected to silica gel column chromatography for the isolation of pure compounds. The isolated compounds were then determined by the use of spectroscopic analysis of HRFABMS, 1 H, 13 C NMR, UV and IR spectra. Results: CHCl 3 soluble portion of Me 2 CO and MeOH extract of P. multiflorum led to the isolation of one new naphthoquinone and eight known compounds including four anthraquinones, one naphthoquinone and two stilbenes. Conclusion: The obtained results will be very useful for the further evaluation various biological studies.
2 citations
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14 Jul 2004
TL;DR: A method of manufacturing the extract of polygonum multiflorum thunb comprises the steps of: extracting Polygonum multilum Thunb. at 0-100 deg.C with a solvent selected from water, polar organic solvent or a mixture thereof; removing the solid component from the extracted solution through centrifuging or filtering; and removing the extracting solvent from the extract solution, followed by purifying it as mentioned in this paper.
Abstract: PURPOSE: Provided is an extract of Polygonum multiflorum Thunb. which involves the activity of lowering the blood sugar, and is well adapted for use in treating the diseases related to diabetes, and in making food additives. CONSTITUTION: A method of manufacturing the extract of Polygonum multiflorum Thunb. comprises the steps of: extracting Polygonum multiflorum Thunb. at 0-100 deg.C with a solvent selected from water, polar organic solvent or a mixture thereof; removing the solid component from the extracted solution through centrifuging or filtering; and removing the extracting solvent from the extracted solution, followed by purifying it. The polar organic solvent is short chain alcohol with C1-C4.
1 citations
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TL;DR: In this article, seven flavonoids were identified from leaves of Polygonum offine D. Don by means of polyamide column, ion exchange and thick layer chromatography.
1 citations
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21 Oct 2016TL;DR: An experiment was conducted for the “eco-friendly management of lesser grain borer Rhizopertha dominica F. on wheat in storage” at the Department of Entomology, Hajee Mohammad Danesh Science and technology University Dinajpur where the highest mortality was found in the extract of Polygonum hydropiper and was statistically best following extract of Xanthium indicum.
Abstract: An experiment was conducted for the “eco-friendly management of lesser grain borer Rhizopertha dominica F. on wheat in storage” at the Department of Entomology, Hajee Mohammad Danesh Science and technology University Dinajpur. N-hexane extracts of 10 weeds such as Clerodendrumviscosum , Xanthium indicum, Mimosa pudica, Polygonum hydropiper , Argemonemexicana, Croton bonpalandianum , Leucus aspara , Dryoptrisfilix-max , Cassia tora , Blumealacera were used. All the experiments were conducted in incubitor at 32 ° C. However, among the 10 weeds extracts the highest mortality was found in the extract of Polygonum hydropiper at 1.5% and was statistically best following extract of Xanthium indicum at 1.5% but none died in the control. All the weeds extract showed more or less performance for the protection of Rhizoperthadominica. However, the lowest seed damage was found in the extract at 1.5% in Polygonum hydropiper followed by Clerodendrumviscosum; Cassia tora;Argemonemexicana; Blumealacera; Leucus aspara . In respect of adult emergence the lowest number of Rhizoperthadominica was found in the extract at 1.5% in Polygonum hydropiper followed by Cassia tora .All the plants at 0.50% and 1.0% gave 100% protections up to 32 days.
1 citations