• Microbiology and Biotechnology Letters
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• v.42 no.1
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• pp.51-57
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• 2014

In this study, the antioxidative effects and component analysis of Polygonum aviculare (P. aviculare) extracts were investigated. The ethyl acetate and the aglycone fraction from P. aviculare extracts were more active than (+)-${\alpha}$-tocopherol and $\small{L}$-ascorbic acid, which are known as strong antioxidants for their antioxidative activity by the DPPH method and chemiluminescence assay. The cellular protective effects of fractions of P. aviculare on the rose-bengal sensitized photohemolysis of human erythrocytes, increased in a concentration dependent manner ($1-10{\mu}l$). In particular, the ethyl acetate fraction at a concentration of $10{\mu}l$ showed the most prominent protective effect among all the extracts (${\tau}_{50}$, 314.70 min). TLC and HPLC chromatogram of the ethyl acetate fraction of P. aviculare extracts revealed 3 main bands (PA8, PA5, PA6) and peaks (peak 1, peak 2, peak 3), which were identified as myricetin-3-O-rhamnoside (myricitrin, PA8, peak 1), quercetin-3-${\alpha}$-rhamnoside (quercitrin, PA6, peak 3) by LC/ESI-MS/MS and $^1H$-NMR respectively. These results indicate that fractions from P. aviculare could be applicable to new functional cosmetics as antioxidants.

• Korean Journal of Plant Taxonomy
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• v.46 no.3
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• pp.326-330
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• 2016

Two naturalized species, Polygonum ramosissimum Michx. (Polygonaceae) and Spergularia bocconi (Scheele) Graebn. (Caryophyllaceae) were found along the southwest seashore of the Korean Peninsula. Polygonum ramosissimum is distinguished from other species in the same genus taxa as follows: not granular achens, lanceolate or oblanceolate leaves. Spergularia bocconi is distinguished from other species in the same genus taxa by having glandular hairs on stems, leaves, peduncles, and outer surfaces of sepals. We provide here a description and photographs of two species and a key to related taxa in Korea.

• Korean Journal of Plant Taxonomy
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• v.38 no.1
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• pp.63-68
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• 2008

We report a taxon of the unrecorded genus Knorringia (Polygonaceae) from Baengryeongdo, Ongin-gun, Incheon-si in the Korean peninsula. This taxon is K. sibirica (Laxm.) Tzvelev subsp. sibirica., has been known from Siberia, Mongolia and China. The new Korean name, 'Si-be-ri-a-yeo-kkwi', was given considering the species epithet and the type locality, Siberia. Description, illustration and photograph showing habitat were given.

• Proceedings of the Zoological Society Korea Conference
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• 1996.10a
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• pp.64.1-64
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• 1996

• Proceedings of the Zoological Society Korea Conference
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• 2000.10a
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• pp.166.1-166
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• 2000

• Proceedings of the Zoological Society Korea Conference
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• 2000.10a
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• pp.99.1-100
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• 2000

• Proceedings of the Zoological Society Korea Conference
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• 1997.10b
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• pp.93.1-93
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• 1997

• Proceedings of the Zoological Society Korea Conference
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• 1997.10b
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• pp.94.2-94
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• 1997

• Korean Journal of Weed Science
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• v.7 no.2
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• pp.144-155
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• 1987

Water extracts of polygonum hydropiper and Polygonum aviculare completely inhibited the germination of lettuce seeds. Methanol extracts from these two species also inhibited the seed germination of lettuce (Lactuca sativa) and Oenothera odorata. Fifteen phenolic acids in total were identified by GLC from P. hydropiper and eighteen from P. aviculare. The most common phenolic acids identified from P. hydropiper were sinapic, salicylic+vanillic and ferulic acid presented in all the fractions. In addition, salicylic+vanillic, tannic+gallic, sinapic, ferulic and p-coumaric acid seemed to be important phenolic compounds in terms of quantity. However, salicylic+vanillic acids were the unique phenolic acids occurred in all the fractions of P. aviculare. The others such as tannic+gallic, sinapic, ferulic, p-coumaric acid, p-cresol and catechol present in large amount appeared also the important phenolic substances influencing allelopathic effects of P. aviculare. Linolenic acid and oxalic acid were the major fatty and organic acids in both plant species, presented in 2.38mg/g and 20.588mg/g in P. hydropiper, 3.70mg/g and 14.288mg/g in P. aviculare, respectively, which seem to be exhibiting allelopathic effects of these plants. Total alkaloids were presented in low amount such as 0.20% in P. hydropiper arid 0.22% in P. aviculare which may not be important elements. Pet. ether extracts were 2.42% in P. hydropiper and 1.65% in P. aviculare, which exhibit another potential for allelopathic effects that need further investigation. Various authentic phenolic compounds at different concentrations inhibited the germination of lettuce seed, indicating that the phenolic substances identified here may be directly related to biologically active substance.

• Applied Chemistry for Engineering
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• v.23 no.2
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• pp.222-227
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• 2012

In this study, nano-emulsion containing ethyl acetate fraction of Polygonum aviculare (P. aviculare) extract was prepared and skin permeability of the nano-emulsion was evaluated. Nano-emulsion was prepared using homogenizer and microfluidizer by the high-energy method. The droplet size and loading efficiency of nano-emulsion containing ethyl acetate fraction of P. aviculare extract were determined. The mean droplet size was 238 nm and the loading efficiency was more than 98%. The size distribution of nano-emulsion was a monodispersed form and nano-emulsion was more stable than that of using typical emulsion without using the microfluidizer. The in vitro skin permeation study of nano-emulsion containing ethyl acetate fraction of P. aviculare extract was carried out using Franz diffusion cells. Compared to 1,3-butylene glycol, nano-emulsion showed greater values of cumulative permeation of ethyl acetate fraction from P. aviculare extract. These results indicate that the stability and skin permeability of nano-emulsion containing ethyl acetate fraction of P. aviculare exerting anti-oxidative and anti-aging activities were enhanced.