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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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Journal Article
TL;DR: In this paper, five flavonoid compounds were isolated from Polygonum hydropiper Linn. by polyamide chromatography and their structures were determined as follows: hyperin, rutin, quercetin, isorhamnetin and kaempferol.
Abstract: Five flavonoid compounds were isolated from Polygonum hydropiper Linn. by polyamide chromatography and their structures were determined as follows: hyperin, rutin, quercetin, isorhamnetin and kaempferol. Isorhamnetin was first obtained from this plant. Volatile oil in leaves of P. hydropiper Linn. was extracted by supercritical carbon dioxide, and their chemical constituents were separated and identified by GC-MS. The amount of identified constituents was over 80.66% of the volatile oil.

4 citations

01 Jan 2003
TL;DR: A new combination is provided for the hybrid between Polygonum cuspidatum and P. sachalinense, which is widespread and invasive across North America.
Abstract: A new combination is provided for the hybrid between Polygonum cuspidatum and P. sachalinense. The hybrid, Polygonum Xbohemicum (J. Chrtek & A. Chrtkovâ) P. F. Zika & A. L. Jacobson, comb, nov., is widespread and invasive across North America. We illustrate the parents and hybrid, and supply a key to distinguish the three taxa.

4 citations

Journal ArticleDOI
TL;DR: In this article, the authors measured the contents of total nitrogen and total phosphorus in Phragmites communis, Phalaris arundinacea and Polygonum lapathifolium, and investigated the influence of various plants on the spatial and seasonal distributions of nitrogen and phosphorus in the wetland soil.
Abstract: The Mt. Beigu wetland, which has undergone periodical changes in water level, lies by the Yangtze River, and its dominant plants are Phragmites communis, Phalaris arundinacea and Polygonum lapathifolium. In order to study the distribution characteristics of nitrogen and phosphorus in the ecological system of the Mt. Beigu wetland, the authors measured the contents of total nitrogen and total phosphorus in Phragmites communis, Phalaris arundinacea and Polygonum lapathifolium, and the contents of nitrogen and phosphorus in the wetland soils with different plant species. In addition the authors investigated the influence of various plants on the spatial and seasonal (spring/autumn) distributions of nitrogen and phosphorus in the wetland soil. The contents of nitrogen and phosphorus in Phalaris arundinacea are significantly higher than those of the other two plant species in the same part. Secondary pollution of phosphorus in the wetland results mainly from Phalaris arundinacea. Phragmites communis effectively carries away nitrogen and phosphorus in the wetland soil in the wet season. The capacity of Polygonum lapathifolium to remove nitrogen is lowest among the 3 species of plants. These findings offer a theoretical foundation for the selection of plant species to restore the ecological environment and for the selection of time and depth for purging silt on the riverside wetland.

4 citations

Patent
17 Oct 2012
TL;DR: In this article, a method for extracting and purifying polygonum multiflorum polysaccharide was proposed, which can remove most pigment and other impurities in the polygonal mixture and improve its purity.
Abstract: The invention discloses a method for extracting and purifying Polygonum multiflorum polysaccharide. The preparation method comprises steps of: adding water into Polygonum multiflorum raw material pretreated with degreasing and ethanol solution for bath reflux extraction; concentrating an extracting solution; carrying out alcohol precipitation to obtain a Polygonum multiflorum polysaccharide crude extract; and decolorizing and purifying with macroporous adsorption resin to obtain the Polygonum multiflorum polysaccharide extract. The method of the invention can remove most pigment and other impurities in the Polygonum multiflorum polysaccharide and improve the purity of the Polygonum multiflorum polysaccharide, on the premise of no damage on the structure and activity of the Polygonum multiflorum polysaccharide.

4 citations

Journal ArticleDOI
TL;DR: The concentrations of 2.3,5,4′-tetrahydroxystilbene-2-O-β-d-glucoside, quercetin, catechin, emodin, and polygoacetophenoside in roots, stems and leaves of Polygonum multiflorum, a traditional Chine...
Abstract: The concentrations of 2,3,5,4′-tetrahydroxystilbene-2-O-β-d-glucoside, quercetin, catechin, emodin, and polygoacetophenoside in roots, stems and leaves of Polygonum multiflorum, a traditional Chine...

4 citations


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Performance
Metrics
No. of papers in the topic in previous years
YearPapers
202333
2022109
202114
202037
201937
201856