• Korean Journal of Environmental Biology
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• v.19 no.4
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• pp.239-247
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• 2001

The Herbal Vegetation on Running Waterside in the Main Stream of Genmho River, Daegu and Gyeongsanbuk-do, Korea was investigated by the methodology from June to August of 1994 and analyzed distribution characteristics of vegetation that was related Water Environment. The vegetation is divided into 6 communities of Persicaria sieboldi-Persicaria hydropiper community, Persicaria thunbergii community, Impatiens textori community, Zizania latifoloa community, Phragmites communis community and Echinochloa crus-galli var. oryzicola community. A BOD and COD that indicate degree of contamination in water were showed 0.9 ppm and 1.6 ppm at upstream and 15.9 ppm and 24.8 ppm at downstream, respectively. The distribution patterns of vegetation have dominated by Impatiens textoricommunity in the upstream, by Persicaria sieboldi-Persicaria hydropiper community from upstream to mid-upstream, by Persicaria thunbergii community from upstream to midstream, by Zizania latifoloa community from nidstream to mid-downstream and by Phragmites communis community and Echinochloa crus-galli var. oryzicola community from mid-downstream to downstream. Especially, I suggested that Persicaria sieboldi-Persicaria hydropiper community and Persicaria thunbergii community will use as biotic indicator in water environment.

• The Korea Journal of Herbology
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• v.30 no.6
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• pp.17-24
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• 2015

Objectives : Persicaria tinctoria belongs to the Polygonaceae family and it has been used as the natural dye traditionally. Also, it is well known that the Persicaria tinctoria is used for treating the following symptoms such as fever, inflammation and edema. The purpose of this study is to investigate the effective source of antioxidants and anti-inflammatory agent from various parts of Persicaria tinctoria.Methods : We investigated the antioxidative and anti-inflammatory properties of the Persicaria tinctoria extracts. Antioxidant activities were measured by 1,1-diphenyl-2- picrylhydrazyl (DPPH), 2, 2'-Azino-bis (3-ethylbenzothiazoline-6-sulfonic acid) diammonium salt (ABTS) radical scavenging activity, Fe²⁺ chelating activity and Reducing power of Persicaria tinctoria extracts. And its inhibitory effect against oxidative DNA damage was evaluated in non-cellular system using φX-174 RF I plasmin DNA. The anti-inflammatory effect of Persicaria tinctoria was measured by using the inhibitory efficacy for the amount of nitric-oxide (NO) produced in LPS induced RAW264.7 cells.Results : The extracts from stem part showed better DPPH scavenging activity compared to those of the leaf and root extracts. Their IC₅₀s were measured as 7.17, 144.40 and 165.07 ug/ml, respectively. These results were similar to that of ABTS radical scavenging assay and reducing power. Also, Persicaria tinctoria showed the protective effects of DNA damage against oxidative stress and anti-inflammatory effect by suppression of NO production in LPS induced RAW264.7 cells.Conclusions : These results showed that various parts of Persicaria tinctoria can be used as an effective source of antioxidants and anti-inflammatory agents via antioxidative activities and anti-inflammatory effect.

• Korean Journal of Weed Science
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• v.10 no.2
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• pp.75-82
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• 1990

Weed species investigated along the waterway of Kyungnam and Kyungpook provinces on September, 1989 were 88 species in 33 families and 96 species in 33 families, respectively. Three weed community types were observed along the waterway of Kyungnam province, namely, Echiuochoa cars-galli, Persicaria hydropiper and Persicaria thunbergii, and five community types such as Humulus japonicus-bideus froudosa, Solanum nigrum, Persicaria thunbergii-Humulus japonicus, Humulus japonicus and Persicaria thunbergii were detected along the waterway of Kyungpook province. The most dominant weed species indentified along the waterways in both Kyungnam and Kyungpook provinces were Pensicaria tlrutrheagii and Persicaria hydropiper which are the aquatic weed species.

• Journal of the Society of Cosmetic Scientists of Korea
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• v.35 no.4
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• pp.293-300
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• 2009

In this study, we investigated the antioxidative activity and inhibitory effects on elastase and tyrosinase of Persicaria hydropiper L. extracts. The free radical (1,1-diphenyl-2-picrylhydrazyl, DPPH) scavenging activities ($FSC_{50}$) of ethyl acetate fractions of Persicaria hydropiper L. was $5.23\;{\mu}g/mL$. Reactive oxygen species (ROS) scavenging activities ($OSC_{50}$) of some Persicaria hydropiper L. extracts on ROS generated in $Fe^{3+}$-EDTA/$H_2O_2$ system were investigated using the luminol - dependent chemiluminescence assay. The ROS scavenging activities ($OSC_{50}$) of ethyl acetate fractions of Persicaria hydropiper L. was $0.40\;{\mu}g/mL$. The protective effects of extract / fractions of Persicaria hydropiper L. on the rose-bengal sensitized photohemolysis of human erythrocytes were investigated. The Persicaria hydropiper L. extracts suppressed photohemolysis in a concentration dependent manner ($1\;{\sim}\;10\;{\mu}g/mL$). Inhibitory effects ($IC_{50}$) on tyrosinase of aglycone fraction of Persicaria hydropiper L. extracts was $8.90\;{\mu}g/mL$. Inhibitory effects ($IC_{50}$) on elastase of aglycone fraction of Persicaria hydropiper L. extracts was $2.37\;{\mu}g/mL$. These results indicate that extract / fractions of Persicaria hydropiper L. can function as antioxidants in biological systems, particularly skin exposed to UV radiation by anti-oxidative activity and protect cellular membranes against ROS. Persicaria hydropiper L. extract / fractions could be used as a new cosmeceutical for whitening and anti-wrinkle products.

• Korean Journal of Weed Science
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• v.10 no.2
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• pp.67-74
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• 1990

Weed species investigated along the Nakdong River on September, 1989 were 105 species in 29 families. Vegetation analysis along the Nakdong River using a two dimensional ordination diagram showed the existence of six plant community types, namely, Humulus japonicum, Persicaria thunbergii, Artemisia capillaris, Persicaria blumei-Setaria viridis-Digitaria sanguinalis and Phragmites communis. Especially the largest community type, Phragmites communis had dominant weed species such as Humulus japonocum, Arundinella hirta, Persicaria thunbergii, Setaria viridis, Sasola collina and Persicaria perfoliata.

• Journal of the Society of Cosmetic Scientists of Korea
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• v.36 no.1
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• pp.89-92
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• 2010

In the previous study, we reported the antioxidative activity, antiaging activity, antibacterial activity and moisturizing effect of cream containing Persicaria hydropiper L. extract. In this study, the components of Persicaria hydropiper L. extract were analyzed by TLC and HPLC. Aglycone fractions obtained from the deglycosylation reaction of ethyl acetate fraction among the Persicaria hydropiper L. extract, showed 2 bands and 2 peaks in TLC and HPLC experiments, respectively. Two components were identified as quercetin and kaempferol. TLC chromatogram of ethyl acetate fraction of Persicaria hydropiper L. extract revealed 6 bands and HPLC chromatogram showed 7 peaks, which were identified as quercetin, hyperin, isoquercitrin, quercitrin, kaempferol. In conclusion, with the antioxidative activity, antiaging activity, antibacterial activity and moisturizing effect reported previously, component analysis of Persicaria hydropiper L. extracts could be applicable to new cosmeceuticals.

• The Korean Journal of Ecology
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• v.18 no.1
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• pp.55-62
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• 1995

This study was conducted to investigate the distribution pattern of plants on streamside of Kyonganchon, which is a tributary of the Han River, and to determine the relationships between plant distribution and environmental factors. Fifteen study sites were selected along the Kyonganchon, and vegetation distribution pattern and soil environmental factors were determined. The most frequently ocurring species in the study sites were Persicaria thunbergii, Persicaria hydropiper, Echinochloa crus-galli and Bidens frondosa, and among them the two Persicaria species were dominants of the community. Many species showed different distribution along the stream:Chenopodium album, Equisetum arvense and Setaria viridies occurred in the upstream region, while Rumex crispus, Leonurus sibiricus and Rorippa islandica occurred in the middle and downstream regions. Analysis of soil properties showed that organic matter and clay content were higher in the upstream region while sand content was higher in the downstream region. The results of DCA ordination showed that axis one was positively correlated with organic matter and clay content and negatively correlated with sand content, indicating that the distribution pattern of vegetation along the Kyonganchon was determined by elevational gradient from upstream to downstream region or gradient of stream width and water level, and by soil organic matter content and soil texture related to these gradients.

• Natural Product Sciences
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• v.21 no.3
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• pp.170-175
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• 2015

The present study aims to detect the rare flavonoids isolated from the leaves of Persicaria glabra. The known flavonoids: quercetin (1), isorhamnetin (2), avicularin (3) and new one isorhamnetin-3-O-α-L-(6''-E-p-coumaroyl)-rhamnoside (4) were identified by HPLC, UV, IR and NMR. P. glabra has used traditionally for its analgesic, anti-inflammatory and anti-rheumatic properties. To find out the ingredients responsible for the efficiency of this plant, we have used to study the anti-microbial and anti-inflammatory activities of different extracts.

• Microbiology and Biotechnology Letters
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• v.38 no.1
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• pp.112-115
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• 2010

In this study, the antibacterial activity and the moisturizing effect of cream contaning Persicaria hydropiper L. extract were investigated by clinical trial. MIC values of ethyl acetate fraction from Persicaria hydropiper on P.acnes, S.aureus, P.ovale were 0.13~0.25%. The results showed that the antibacterial activity of the ethyl acetate fraction was higher than or equal to the methyl paraben and quercetin. The cream containing the ethyl acetate fraction of Persicaria hydropiper L. extracts was formulated for skin hydration effect. Also, the transepidermal water loss (TEWL) and the water contents in skin were measured. The cream containing Persicaria hydropiper L. extract was applied to the right lower arm. After 180 min, TEWL of parts was decreased as $6.5\;g/m^2h$ (experimental cream) and $7.5\;g/m^2h$ (placebo cream) respectively. And the water contents in skin were increased by 2~4% than the placebo cream. These results indicate that extract/fractions of Persicaria hydropiper L. can function as high potential as bactericide against the skin pathogenic bacteria and the increase of skin hydration of the cream containing extract could be applicable to new functional cosmetics for antiaging.

• Korean Journal of Agricultural Science
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• v.5 no.2
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• pp.115-119
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• 1978

To improve the feed value of rice straw, Tongil type rice straw and Persicaria Thunbergii Gross var. coreana Gross ex Nakai were mixed in the ratios of 10 : 90 (T1), 20 : 80 (T2), 30 : 70 (T3) and 40 : 60 (T4) in fresh weight and ensiled for 6 weeks. The chemical composition of fresh materials and silage, the organic acid contents and pH in silage were determined. And the results obtained were summarized as follow: 1. The crude protein content in rice straw was 8.18% of DM basis and that in Persicaria Thunbergii was 14.47%. And the nitrogen-free extract content in rice straw was 44.66% and.. that in Persicaria Thunbergii was 51.13%. 2. The optimum moisture contents were appeared in T2 as 72.12% and T3 as 66.43%. Considerably high crude protein contents were determined from all of treatments. 3. The pH of silage was varied from pH 3.8 of T1 to pH 4.5 of T2. And Total organic acid contents were increased from T1 to T4, but the percentage of lactic acid contents to total acid contents were decreased. 4. It was concluded that good quality silage could be made from rice straw with Persicaria Thunbergii and the best ratios of rice straw: Persicaria Thunbergii were between 20 : 80 and 30 : 70 in fresh weight.