• Title, Summary, Keyword: Natural product

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A Pyridyl Alkaloid and Benzoic Acid Derivatives from the Rhizomes of Anemarrhena asphodeloides

  • Youn, Ui-Joung;Lee, Yoo-Jin;Jeon, Ha-Rim;Shin, Hyun-Ji;Son, Young-Min;Nam, Joo-Won;Han, Ah-Reum;Seo, Eun-Kyoung
    • Natural Product Sciences
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    • v.16 no.4
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    • pp.203-206
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    • 2010
  • A pyridyl alkaloid, 3-pyridylcarbinol (1) and benzoic acid derivatives, 4-hydroxy benzoic acid (2), 4-hydroxyactophenone (3), vanilic acid (4), and benzoic acid (5) were isolated from the rhizomes of Anemarrhena asphodeloides on the basis of spectroscopic and physicochemical analyses including 1D- and 2D- NMR techniques as well as by comparison of their data with the published values. Compounds 1 - 5 were isolated for the first time from this plant source.

Minor Phenolic Constituents of the Anemarrhenae Rhizoma

  • Youn, Ui-Joung;Lee, Ye-Seul;Jeong, Ha-Na;Nam, Joo-Won;Lee, Yoo-Jin;Son, Young-Min;Hwang, Eun-Sook;Seo, Eun-Kyoung
    • Natural Product Sciences
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    • v.15 no.4
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    • pp.203-207
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    • 2009
  • A homoisoflavanone, 7,4'-dihydroxyhomoisoflavanone (1) and a flavanone, (2S)-7,4'-dihydroxy-5-methoxyflavanone (2), were isolated from the rhizomes of Anemarrhena asphodeloides, together with 4,4'-dihydroxychalcon (3), 2'-O-methylphlorethin (4), 1,3-bis-di-p-hydroxyphenyl-4-penten-1-one (5), and 2,4'-dihydroxy-4-methoxybenzophenone (6) on the basis of spectroscopic and physicochemical analyses including 1Dand 2D- NMR techniques as well as by comparison of their data with the published values. Compounds 1 - 4 were isolated for the first time from this plant source. Among isolates, compound 2 exhibited moderate inhibitory effect on the differentiation of pre-adipocyte 3T3-L1 cells.

Chemical Constituents from the Stony Coral Alveopora japonica

  • Youn, Ui-Joung;Lee, Yoo-Jin;Jeon, Ha-Rim;Shin, Hyun-Ji;Son, Young-Min;Nam, Joo-Won;Han, Ah-Reum;Song, Jun-Im;Won, Yong-Jin;Seo, Eun-Kyoung
    • Natural Product Sciences
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    • v.17 no.1
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    • pp.1-4
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    • 2011
  • Chemical investigations of the stony coral Alveopora japonica Eguchi (Poritidae) resulted in the isolation of four known compounds (1 - 4). The structures of 1 - 4 were identified as a sterol, ergosta-5,24(28)-dien-$3{\beta}$-ol (1), a mixture of monoacyl glycrols (2), eicosanoic acid and tetracosanoic acid, and two nucleosides, thymine (3) and 2'-deoxythymidine (4), respectively, on the basis of spectroscopic and physicochemical analyses including 1D- and 2D- NMR techniques as well as by comparison of their data with the published values. Compounds 1 - 4 were isolated from this species for the first time. Moreover, these compounds (1 - 4) were found in the genus Alveopora and the family Poritidae for the first time.

Perceived Risks and Benefits to Natural Dyeing Product -The Role of Product Knowledge- (천연염색 의류제품에 대한 지각된 위험과 혜택 -천연염색 제품지식에 따른 차이-)

  • Hong, Hee-Sook;Hong, Byung-Sook
    • Journal of the Korean Society of Clothing and Textiles
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    • v.32 no.9
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    • pp.1343-1355
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    • 2008
  • This study examined the influences of product knowledge(subject knowledge, purchase experience and information search) on perceived risks and benefits to natural dyeing product. Data were collected from a total of 213 Korean females ranging from 20 to 50 years old who know natural dyeing product through online survey. There were significant differences between(or among) groups with different levels of subject knowledge, purchase experience and information search in several types of perceived risks and benefits to natural dyeing product. Consumers with high knowledge of natural dyeing product perceived several types of risks lower than consumers with low knowledge but they perceived several types of benefits higher than consumers with low knowledge.

Montmorillonite Clay Catalyzed Three Component, One-Pot Synthesis of 5-Hydroxyindole Derivatives

  • Reddy, B.V. Subba;Reddy, P. Sivaramakrishna;Reddy, Y. Jayasudhan;Bhaskar, N.;Reddy, B. Chandra Obula
    • Bulletin of the Korean Chemical Society
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    • v.34 no.10
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    • pp.2968-2972
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    • 2013
  • A highly efficient and environmentally benign protocol has been developed for the first time to produce a wide range of biologically active 5-hydroxyindole derivatives using montmorillonite KSF clay as a reusable solid acid catalyst. The use of recyclable clay makes this procedure quite simple, more convenient and cost-effective.

An Analysis of Natural Motion for Product Design : Refrigerator Half Guard Installation Part Design (자연스러운 동작 분석을 통한 냉장고 Half Guard 조립체의 인간공학적 개선)

  • Park, Jang-Woon;Kim, Su-Jin;You, Hee-Cheon
    • Journal of Korean Institute of Industrial Engineers
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    • v.37 no.1
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    • pp.10-18
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    • 2011
  • Ergonomic product design considering users' natural use motion is of importance to improve the usability and satisfaction of a product. A five-step process of product design was developed in the present study by measuring and analyzing users' natural product-use motion with a motion capture system. The developed process was applied to ergonomic design improvement of a half guard installation part of refrigerator; new guard designs (diagonal and arc shape) were developed with the process and evaluated in terms of validity during the development as two measures (task satisfaction and similarity of natural motion). According to the evaluation result, the satisfaction at putting in- and out-task of new guard designs ($6.3{\pm}0.5$ points) was significantly higher than that of existing guard designs ($3.3{\pm}1.0$ points); the difference between natural motion and product-use motion in new guard designs ($1.0{\pm}0.3cm$) was significantly less than that of existing guard designs ($2.0{\pm}0.2cm$). The proposed process of natural motion analysis and product design is applicable to ergonomic product design and evaluation.