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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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Patent
08 May 2013
TL;DR: In this paper, a method for extracting tetrahydroxystilbene glucoside from polygonum multiflorum is described, which belongs to the technical field of biological medicines.
Abstract: The invention discloses a method for extracting tetrahydroxystilbene glucoside from Polygonum multiflorum, and belongs to the technical field of biological medicines The extraction method comprises the following steps: 1, taking Polygonum multiflorum powder, mixing the Polygonum multiflorum powder with an alkali having a mass being 05-3% of the Polygonum multiflorum powder, adding water having a mass 7-9 times higher than the Polygonum multiflorum powder, and uniformly mixing to obtain a Polygonum multiflorum powder suspension; 2, carrying out reflux extraction of the Polygonum multiflorum powder suspension, and concentrating to obtain a concentrate; 3, adding an organic solvent having a volume fraction of 90-95% and having a mass being 2-4 times higher than the concentrate for precipitation, filtering after precipitation completion, and collecting the obtained filtrate; and 4, adding ethyl acetate to the filtrate for extraction, collecting the water phase, allowing the water phase to stand for crystallization, and collecting crystals after crystallization completion to obtain tetrahydroxystilbene glucoside The method has the advantages of simple preparation technology, low cost, prepared tetrahydroxystilbene glucoside purity of above 95%, no chemical reagent residual of the product, environmental protection of the extraction process, low reagent and equipment requirements, and suitableness for the large-scale industrial production

1 citations

Dissertation
01 Jan 2010
TL;DR: In this paper, a green reaction was used to transform polygonum senegalense chalcones into dihydrochalcones, flavanones and imines.
Abstract: Polygonum senegalense produces surface exudates composed mainly of chalcones, flavanones and a homoisoflavanone. Synthetic transformation of some of the chalcones to new entities has been achieved via environmentally benign reactions (‘green reactions’). Four chalcones were transformed into dihydrochalcones, flavanones and imines. Reaction of the pinostrobin chalcone (24) with selected primary amines resulted into two flavanone imine derivatives. The reaction was carried out at room temperature in water. These derivatives were obtained in yields of 45% for 7-methoxy-4-(methyl imino)-2-phenylchroman-5-ol (1) and 78% for 4-(ethyl imino)-7-methoxy-2phenylchroman-5-ol (2). Four flavanones: 5-hydroxy-7,8-dimethoxyflavanone (3), alpinetin (4), 5-hydroxypinostrobin (5) and 5,7-dimethoxyflavanone (6) were prepared in aqueous media at the intervention of NaOH catalysis at room temperature. This is a single step reaction that does not require use of organic solvents since isolation of the products was achieved via simple filtration with low-high chalcone-flavanone conversion achieved. Catalytic hydrogenation of the chalcones provided four dihydrochalcones: dihydropashanone (7), uvangolatin (8), 2’,6’-dihydroxy-4’-methoxydihydrochalcone (9), lapathone (10). This was accomplished by bubbling hydrogen gas through * f solution of the respective chalcone with catalytic aid of palladium (5%) on charcoal to provide the dihydrochalcones in high yields (over 97% yields).

1 citations

Patent
20 Nov 2013
TL;DR: In this article, an application of a Polygonum multiflorum extract in controlling grey mould fruit rot of strawberry is described, which can be further developed to novel plant source bactericide.
Abstract: The invention relates to an application of a Polygonum multiflorum extract in controlling grey mould fruit rot of strawberry. The extract is Polygonum multiflorum earthnut which is extracted by sterile water. According to the invention, Polygonum multiflorum is taken as a plant source extract resource to extract antibacterial substances, and the extract has the inhibiting effect and a certain in-vitro control efficiency to mould fruit rot of strawberry and can be further developed to novel plant source bactericide.

1 citations

Patent
30 Sep 2015
TL;DR: In this paper, a medicine for hyperlipemia and atherosclerosis treating and a preparation method and an application is presented, the medicine is prepared by raw materials, by weight, 80-100 parts of rheum emodin and 4-6 parts of aloe emoderin which are active ingredients in a polygonum multiflorum free anthraquinone derivant.
Abstract: The invention discloses medicine for hyperlipemia and atherosclerosis treating and a preparation method and an application. The medicine is prepared by raw materials, by weight, 80-100 parts of rheum emodin and 4-6 parts of aloe emodin which are active ingredients in a polygonum multiflorum free anthraquinone derivant. The invention discloses the novel application for the polygonum multiflorum free anthraquinone derivant, a wide application prospect and a medicinal value are provided for the research for polygonum multiflorum which serves as traditional old medicine and active ingredients of the polygonum multiflorum. The active ingredients such as the rheum emodin and the aloe emodin which are screened in the polygonum multiflorum free anthraquinone derivant serve as the raw materials, the prepared medicine has an obvious effect on aspects such as the hyperlipemia treating and AS treating, and the good application prospect is obtained.

1 citations

Patent
19 Jun 2013
TL;DR: In this paper, a method for making polygonum multiflorum porridge is described, which has the effects of liver-tonifying, kidney-nourishing, essence-generating and hair-caring, and antiaging and hairblacking.
Abstract: The invention discloses a method for making polygonum multiflorum porridge, and relates to the field of a food making method. The method includes cooking 50 g of polygonum multiflorum, 100 g of rice, 50 g of Chinese-date, and 120 g of sugar for 2 h, and then taking the dense juice by water decoction. The porridge of the present invention has the effects of liver-tonifying, kidney-nourishing, essence-generating and hair-caring, and anti-aging and hair-blacking.

1 citations


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