Polygonum

About: Polygonum is a research topic. Over the lifetime, 1230 publications have been published within this topic receiving 12765 citations.

Ultrasonic Solvent Extraction Followed by Dispersive Solid Phase Extraction (d-SPE) Cleanup for the Simultaneous Determination of Five Anthraquinones in Polygonum multiflorum by UHPLC-PDA

Abstract: A rapid and effective ultra-high performance liquid chromatography (UHPLC) method was developed for the determination of five anthraquinones (emodin, physcion, aloe-emodin, rhein, and chrysophanol) in Polygonum multiflorum. The target compounds were ultrasonically extracted with 70% methanol, followed by dispersive solid-phase extraction (d-SPE) with HC-C18 and desorption with acetonitrile. The five anthraquinones were separated on an ACQUITY UPLC® HSS T3 column (2.1 × 100 mm, 1.8 μm) and detected by a photodiode array detector (PDA) at 254 nm. Under the optimized conditions, linear relationships were achieved in the range of 0.3~100 mg/L for emodin, 0.3~40 mg/L for physcion, 0.1~20 mg/L for aloe-emodin, and 0.05~20 mg/L for rhein and chrysophanol. The limits of detection of the five analytes ranged from 0.01 to 0.08 mg/L, and the recoveries were within the range of 82.8~118.4% with an RSD (n = 6) of 1.0~10.3%. The intra-day and inter-day precision (n = 5) of the five targets were in the range of 1.0~1.8% and 3.0~3.1%, respectively. Furthermore, this method was applied to analyses of Polygonum multiflorum samples collected from different regions in China with satisfactory results. All the results indicated that this method is suitable for the detection of five anthraquinones in Polygonum multiflorum.

Polygonum multiflorum for promoting hair to be black and method thereof

Abstract: PURPOSE: A liquor containing Polygonum multiflorum, and a method for manufacturing the same are provided to quickly obtain the liquor, to commercialize through process standardization and mass production, and to control alcohol content. CONSTITUTION: A method for manufacturing a liquor containing Polygonum multiflorum comprises: a step of cutting and steaming Polygonum multiflorum roots, and drying to a water content of 5% or less to prepare a primary dried fragment of Polygonum multiflorum(10); a step of dipping the fragment in soybean water for 20-30 hours, and drying to a water content of 5% or less to prepare a fragment of Polygonum multiflorum(20); a step of preparing hard-boiled rice and seeding seed malt, and wrapping for 40-56 hours to prepare ipguk(Japanese koji)(30); a step of adding the ipguk to water in a weight ratio of 1:14-16, and culturing for 3-5 days; a step of adding ipguk and water in a weight ratio of 1:1.3-1.7, and fermenting to prepare a primary fermentation(40); a step of pulverizing water-soaked rice, mixing with nuruk, a purified enzyme agent, and water, and fermenting for 10 hours(50) to prepare a secondary fermentation; a step of mixing the primary and secondary fermentations in a weight ratio of 1:1.2-1.5, and filtering to prepare soju; a step of distilling the soju, and aging in a jar for 10 hours; and a step of extracting 60-80g of fragment of Polygonum multiflorum in 1L of purified soju for 30 days or more(60). [Reference numerals] (10) Primary Beopje step; (20) Secondary Beopje step; (30) Ipguk(Japanese koji) preparing step; (40) Primary mashing step; (50) Secondary mashing step; (60) Polygonum multiflorum liquor completing step

Shading Effects on Leaf Gas Exchange, Leaf Pigments and Secondary Metabolites of Polygonum minus Huds., an Aromatic Medicinal Herb.

Abstract: The growing demand for high value aromatic herb Polygonum minus-based products have increased in recent years, for its antioxidant, anticancer, antimicrobial, and anti-inflammatory potentials. Although few reports have indicated the chemical profiles and antioxidative effects of Polygonum minus, no study has been conducted to assess the benefits of micro-environmental manipulation (different shading levels) on the growth, leaf gas exchange and secondary metabolites in Polygonum minus. Therefore, two shading levels (50%:T2 and 70%:T3) and one absolute control (0%:T1) were studied under eight weeks and 16 weeks of exposures on Polygonum minus after two weeks. It was found that P. minus under T2 obtained the highest photosynthesis rate (14.892 µmol CO2 m−2 s−1), followed by T3 = T1. The increase in photosynthesis rate was contributed by the enhancement of the leaf pigments content (chlorophyll a and chlorophyll b). This was shown by the positive significant correlations observed between photosynthesis rate with chlorophyll a (r2 = 0.536; p ≤ 0.05) and chlorophyll b (r2 = 0.540; p ≤ 0.05). As the shading levels and time interval increased, the production of total anthocyanin content (TAC) and antioxidant properties of Ferric Reducing Antioxidant Power (FRAP) and 2,2-Diphenyl-1-picrylhydrazyl (DPPH) also increased. The total phenolic content (TPC) and total flavonoid content (TFC) were also significantly enhanced under T2 and T3. The current study suggested that P.minus induce the production of more leaf pigments and secondary metabolites as their special adaptation mechanism under low light condition. Although the biomass was affected under low light, the purpose of conducting the study to boost the bioactive properties in Polygonum minus has been fulfilled by 50% shading under 16 weeks’ exposure.

Method for remediating lead-contaminated soil or water

Abstract: The invention discloses a method for remediating lead-contaminated soil or water, which comprises the following steps: (1) collecting Polygonum criopolitanum; (2) planting Polygonum criopolitanum in soil or water; (3) periodically harvesting the Polygonum criopolitanum and part of stolons above the ground or water; (4), continuing to plant and harvest the Polygonum criopolitanum till the lead content of the soil or water reaches a safe standard; and (5) performing pollution-free disposal on the harvested Polygonum criopolitanum. In the method of the invention, the Polygonum criopolitanum is planted in the lead-contaminated soil or water, so extraction can be performed continuously, the remediation process of the soil and water is simplified, and the lead contamination problem of soil can be solved radically. The method of the invention is low in cost and high in maneuverability and avoids damaging the structure of the environmental soil and causing secondary pollution.