• Title/Summary/Keyword: Korean yam

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Effect of air-jet texturing conditions on the physical properties of split-type ultrafine P/N filaments

  • Lee Eun-Ju;Bok Jin-Seon;Ju Chang-Hwan
    • Proceedings of the Korean Fiber Society Conference
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    • 1998.10a
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    • pp.394-397
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    • 1998

  • Characteristics of air-jet textured yarns are determined by linear density, strength, and instability together with structural properties. Such characteristics are affected by various processing parameters and supply yam properties. In this Paper, specially, we have studied on the effect of air jet texturing conditions not only on texturing characteristics but also on splitting behavior using split-type ultrafine P/N filaments and their draw textured yarns as raw materials. (omitted)

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Antioxidant Activity and Melanin Inhibitory Effects of Yambean (Pachyrhizus erosus) Extract (얌빈 추출물의 항산화 효능과 멜라닌 생성 억제효과)

  • Lee, AhReum;Kim, Gyo-Nam;Kim, Hae-Ok;Song, WeonJung;Roh, Seong-Soo
    • The Korea Journal of Herbology
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    • v.32 no.2
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    • pp.57-64
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    • 2017

  • Objectives : Yam bean (Pachyrhizus erosus) possess various nutrients, it has been widely used as traditional cosmetic material in Indonesia. The aim of this study was to investigate the anti-oxidant activity and the anti-melanogenic effect of Yambean (Pachyrhizus erosus) extract and its fractions. Methods : The anti-oxidant activity of yam bean extract assessed based on total polyphenol, flavonoid contents, DPPH and ABTS radical scavenging assay. To evaluate anti-melanogenic effects and cytotoxicity of Yambean extract and its fractions, B16F10 melanoma cell was used. Results : In results, total polyphenol content of yam bean water extract (YW) and Yambean 70% ethanol extract (YE) were $1.18{\pm}0.03mg/g$ (mg of gallic acid/g of sample), $1.16{\pm}0.01mg/g$. Total flavonoid contents of YW, YE were $3.55{\pm}0.06mg/g$ (mg of naringin/g of sample), $1.78{\pm}0.03mg/g$. Moreover, YE scavenged DPPH and ABTS effectively in $4mg/m{\ell}$ compared to YW. Cytotoxicity of YE and its fractions in B16F10 melanoma cell was measured using MTT assays. It had no cytotoxicity up to $500{\mu}g/m{\ell}$. Melanin accumulation in B16F10 melanoma cell was induced using alpha-melanocyte stimulating hormone (${\alpha}-MSH$) and 3-isobutyl-1-methylxanthine (IBMX). B16F10 melanoma cell treated with $10-500{\mu}g/m{\ell}$ YE and hexane, ethyl acetate, butanol, $H_2O$ fractions for 24h. Non treated B16F10 melanoma cell (Control) markedly increased melanin contents. In contrast, YE ethylacetate fraction effectively suppressed melanin accumulation in a dose-dependent manner. Conclusion : In conclusion, these results suggest that Yambean extract has the potential as a cosmetic material which possess anti-oxidant and anti-melanogenic activities.

  • https://doi.org/10.6116/kjh.2017.32.2.57. 인용 PDF KSCI