• Title/Summary/Keyword: hemp

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Optimum Sowing Date for Seed Production in Hemp (대마의 채종재배를 위한 파종적기)

  • 박규철;박태동;박인진;권병선;김상철;정병준;김명석
    • KOREAN JOURNAL OF CROP SCIENCE
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    • v.42 no.4
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    • pp.424-428
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    • 1997
  • This study was carried out to investigate the effects of sowing dates, Apr. 25, May 15, June 5 and June 25, on sex ratio, growth and seed yield of "Chonnam species", local variety of hemp plant. The results were following as. : In sex ratio according to the different seeding dates, the revealating rate of female and male plants were highest on June 25, and Apr. 25, respectively. The length of stem, the number of branches, nodes, and seed yield were increased on May 15, but these charateristics were rapidly reduced on June 25 because of short growing period. Yield of seeds was increased by 24% on May 15 comparing with 1.30ton /ha on Apr. 25.

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Enhancing Enzymatic Saccharification by Aqueous Ammonia Soaking Pretreatment on Several annual plants (일년생 바이오매스(옥수수 줄기, 담배 줄기, 대마 목부)의 암모니아 침지 전처리가 효소 당화에 미치는 영향)

  • Shin, Soo-Jeong;Yu, Ju-Hyun;Park, Jong-Moon
    • 한국신재생에너지학회:학술대회논문집
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    • 2009.06a
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    • pp.418-421
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    • 2009
  • Effects of aqueous ammonia soaking to three annual plants (hemp woody core, tobacco stalk and corn stover) awere investigated to focus on the enzymatic saccharification characteristics change by this treatment. At two different levels of treatment ($90^{\circ}C$-16 h and $45^{\circ}C$-6 days), higher temperature treatment led to more enzymatic saccharification of cellulose to glucose by commercial cellulase mixtures (Celluclast 1.5L and Novozym 342 from Novozyme Korea). Difference among annual plants were significant. corn stover was the best response to enzymatic saccharification of cellulose and xylan by comercial enzymes all treatment conditions but tobacco stalk was the worst response to all of them. chemical composition or physical structure difference may brought this difference.

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A Study on the Appearance Characteristics of Selected Fabrics for Ecology Trends (에콜로지 트렌드 소재의 외관 특성에 관한 연구)

  • Lee, Jung-Min;Kim, Jong-Jun;Jeon, Dong-Won
    • Journal of Fashion Business
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    • v.12 no.4
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    • pp.131-142
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    • 2008
  • One of the major fashion trends is the naturalism and ecology-conscious trend. The natural looks required in the trend require somewhat random distribution of yarn linear density, which results in irregular appearance along the yarn. This is a technically challenging work of producing yarns that look natural far from being artificial yet maintaining the intricately aesthetic randomness without causing process disturbances. This study focused on the characteristics of fabrics made of natural cellulosic fibers including hemp, ramie, flax, and polyester fabrics. Image analysis of the fabric samples included area measurement of yarn specimen, FFT and inverse FFT. Measurements of bending resistance, thickness, air permeability, and weight were also implemented to interpret the structural differences.

The Problem of the Conservation of the Paintings on the Silk - Lining paper - (견본회화 보존수리에 있어서의 문제점 - 배접지 -)

  • Park, Chi sun
    • Journal of Conservation Science
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    • v.5 no.2 s.6
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    • pp.57-64
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    • 1996
  • Korean Paintings have been drawn on in the main two types of support material - paper and silk. In these things, silk designates picture silk, that of a specially weaved textile for painting since CHO-SUN dynasty, different such as hemp, ramie have been started to use for support material In addition to picture silk. However the structure of hemp and ramie are so close and progue, They are not proper to express the technique of pigments on the back of the paintings. On the other hand, picture silk is efficacious in pigments on the back of the painting with its interval between the strands and translucent textile. As the result, paintings on the silk has many - sided techniques as compared with painting on the papers therfore various devices in conservation have to be considered to deal with the techniques. In this report the focus is on classifying the method of removing the Lining paper according to the several types of expression technique of paintings on the silk.

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Evaluation of the Fineness of Degummed Bast Fibers

  • Wang, H.M.;Wang, X.
    • Fibers and Polymers
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    • v.5 no.3
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    • pp.171-176
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    • 2004
  • Fiber fineness characteristics are important for yarn production and quality. In this paper, degummed bast fibers such as hemp, flax and ramie have been examined with the Optical Fiber Diameter Analyzer (OFDA100 and OFDA2000) systems for fiber fineness, in comparison with the conventional image analysis and the Wira airflow tester. The correlation between the results from these measurements was analysed. The results indicate that there is a significant linear co-relation between the fiber fineness measurement results obtained from those different systems. In addition, the mean fiber width and its coefficient of variation obtained from the OFDA100 system are smaller than those obtained from the OFDA2000 system, due to the difference in sample preparation methods. The OFDA2000 system can also measure the fiber fineness profile along the bast fiber plants, which can be useful for plant breeding.

A Study on Fabrics in Kaya Period - Focused on the Fabrics of the Okjeon Old Tomb - (가야의 직물에 관한연구 - 옥천고문군 출토유물을 중심으로 -)

  • 정복남
    • Journal of the Korean Society of Costume
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    • v.49
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    • pp.85-94
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    • 1999
  • The fabrics attached to the remains of the Okjeon old tomb in the Kaya period were examined. Most of fabrics examined were composed of hemp and silk. Considering that silk was found in the old tomb of the Kaya period in the late 5th century and that various kinds of silk were used in the other area silk was assumed to be used before 5th century in the Kaya period. Only the structure of the densely plain weaved fabrics were analysed as silk and the other physical properties of the fabrics could not be the examined fabrics were plain weaved and altered structure with twill and plain weaving were found indicating that diverse weaving structures were used in the Kaya period. This indicate a certain level of cultural exchange between Kaya and Silla PaikJae, Kokuryo and weaving technique were almost similar in the Korean peninsula in the 5th century.

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The Actual Condition and Problems of Current Shrouds (현행수의의 실태 및 문제점)

  • 조효숙;안지원
    • Journal of the Korean Society of Costume
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    • v.52 no.3
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    • pp.123-137
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    • 2002
  • The purpose of this study is to analyze the actual condition and problems of current ready-made shrouds. Current shrouds were formed after the 20th century and therefore are quite apart from its traditional precedents of Chosun Dynasty. In this respect, several problems can be pointed out. 1. The use of natural colored hemp as a primary textile of current shrouds is far from our tradition. Silk, ramie, and cotton have to be used together with hemp. Also, more variety of colors can be used other than natural white. 2. The size of ready-made shrouds has to be categorized at least into three: large, medium and small 3. The pattern and sowing method of Dopo(도포) and Wonsam(원삼) should be corrected in line with those of the traditional Dopo(도포) and Wonsam(원삼). 4. The design and items of current ready-made shrouds have to break away from the standardized convention and should seek more of a variety that our rich tradition provide. 5. The rational index should be suggested so that consumers can compared the quality and price of ready-made shrouds available at their hands.