• Title/Summary/Keyword: green-tech

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Ecological Image in Fashion During the Early Period of 1990's (1990년대 초반 복식유행에 나타난 에콜로지 이미지)

  • 한소원;김영인
    • Journal of the Korean Society of Clothing and Textiles
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    • v.23 no.2
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    • pp.296-306
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    • 1999
  • This study reflects the aim of analyzing the fashion design connection with ecology. Ecology has been linked to human life through its changing relations with environment. In order to recover eco-system ecology-nature oriented methodology and technology oriented approach will suffice. On the modern design field Green design Recycling and Green marketing resulted in increasing rates of environment-friendly production and an effort to deliver environment-friendly corporate image. Based on above research ecological image on fashion design during the year 1990 to 1995 represents the following conclusion. In the fashion design field natural image primitive image nature -harmonious image material-recyling image culture-recycling image are proposed. In the technology field clean image and high-tech image are proposed. In the marketing field happy image harmonious image serious image and realistic image are proposed.

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The Classification and Characteristics of Landscape on Urban Land Use Patterns - The Case of Metropolitan Daejeon - (도시의 토지이용 형태별 경관특성과 유형 - 대전광역시를 사례로 -)

  • Kim Dae-Hyun;Kim Dae-Soo;Joo Shin-Ha;Oh Se-Rae
    • Journal of the Korean Institute of Landscape Architecture
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    • v.33 no.4 s.111
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    • pp.1-10
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    • 2005
  • Recently, as urban landscape is growing in importance, urban landscape planning is being actively performed. for this purpose, classification of the urban landscape is definitely required. Therefore, this research focuses on classifying urban landscape in Daejeon metropolis by dividing the urban land use pattern. This results are as follows. 1. Urban land use pattern is divided into 20 classes. The residential, commercial and industrial areas, the old market and the bus terminal are evaluated negatively, whereas the areas of school, water reservoir, neighborhood park and train station are appreciated as being positive in landscape characters. 2. As a result of a cluster analysis, urban landscape has five different landscape types. These are: landscapes of medium diversity lacking green area, landscapes of high diversity lacking green area, landscapes rich in green area and with medium diversity, landscapes rich in green area and with high diversity, and landscapes rich in green area and with low diversity. 3. In landscape characters of beauty and harmony, landscapes rich in green area and with medium diversity are more positively evaluated than those rich in green area and with low diversity. This point should be taken into account for planning the urban landscape.

Antiplatelet Aggregation Potencies of some Allium spp. Grown in Indonesia

  • Wijaya, C. Hanny;Muchtadi, Deddy;Lalel, Herianus J.;Zakaria, Fransiska;Koswara, Sutrisno
    • Natural Product Sciences
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    • v.2 no.1
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    • pp.37-42
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    • 1996
  • Several species and varieties of Allium spp. grown in Indonesia were screened for their in vitro antiplatelet aggregation activities. The extracts were also analyzed by GC for their volatile sulfur-containing compounds, and measured for their Volatile Reducing Substances (VRS) contents. Antiplatelet aggregation potencies of Allium spp. were varied among the species and varieties studied. Garlic extracts showed the greatest ability to inhibit platelet aggregation followed by extract of shallot, chive, yellow onion, and green onion. The 'Jawi' and 'local Padang' variety of garlic showed high activities with $IC_{50}$ values of 9.1 and $9.8\;{\mu}g/ml$, respectively. The local Kupang variety of shallot showed the highest antiplatelet activity among the shallot varieties evaluated, with an $IC_{50}$ value of $111\;{\mu}g/ml$. Antiplatelet aggregation activities of Allium extracts showed a positive correlation with the level of volatile compounds.

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Test coupon Preparation using high strength LTCC materials of CAS system (CAS계 고강도 LTCC 소재를 이용한 적층 모듈형 테스트 쿠폰 제작)

  • Kwon, Hyeok-Jung;Shin, Hyo-Soon;Yeo, Dong-Hun;Kim, Jong-Hee;Cho, Yong-Soo
    • Proceedings of the Korean Institute of Electrical and Electronic Material Engineers Conference
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    • 2008.06a
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    • pp.305-305
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    • 2008
  • LTCC는 고주파영역에서 손실이 낮고 적층구조의 모듈제작이 가능하여 고주파용 모듈제작에 응용이 가능하다. 최근 수동소자가 내장된 ASM이나 FEM 등의 모듈은 그 집적도가 높고 기판의 두께가 감소함에 따라 소재의 고강도 특성이 요구되고 있다. 이와 같은 경향에 따라 Anorthite계 결정화 유리로 알려진 300MPa 이상의 고강도를 나타내는 CaO-Al2O3-SiO2계 소재가 선행 연구 과정을 통하여 개발되었다. 본 실험에서는 기 개발된 조성의 고강도 소재를 이용하여 RF부품에 적용하기 위한 테스트 쿠폰을 제작하였다. 고강도 소재를 이용하여 green sheet를 제조하고 수동소자인 R, L, C 등을 기판 내에 내장화 하기위해 LTCC 공정을 이용하여 각 층에 다양한 선폭 및 크기의 패턴을 인쇄한 뒤 적층하여 $900^{\circ}C$에서 소결하였다. 이 과정에서 공정에 대한 적용성이 각 공정별로 평가되었으며 완성된 테스트 쿠폰을 이용하여 소재의 전기적인 특성을 평가하였다.

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Antitumor Activities of Sea Staghorn (Codium fragile) against CT-26 Cells

  • Kim, Kil-Nam;Kim, Soo-Hyun;Kim, Won-Suk;Kang, Sung-Myung;Lee, Ki-Wan;Lee, Wook-Jae;Park, Soo-Yeong;Kim, Se-Kwon;Jeon, You-Jin
    • Food Science and Biotechnology
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    • v.17 no.5
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    • pp.976-982
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    • 2008
  • The 10 species of marine green algae was collected from Jejudo(Island) in Korea. Methanolic and aqueous extracts were prepared and screened for inhibition activities against tumor cell growth. Of the tested samples, the sea staghorn (Codium fragile) aqueous extract (CFAE) showed the highest activity on CT-26 cell growth. Therefore, CFAE was selected for further experiments and the possibility to induce apoptosis by the CFAE was investigated. Flow cytometric analysis revealed that it dose-dependently increased apoptotic cells with hypodiploid DNA contents in CT-26 cell line. These results indicated that CFAE can suppress the growth of CT-26 cells through apoptosis. The CFAE decreased the protein expression of anti-apoptotic Bcl-xL and led to the activation of caspase-3 and -7. A crude polysaccharide was separated from CFAE and it mainly constituted with 61.2% galactose and 30.5% arabinose as analyzed by high performance liquid chromatography (HPLC).

Anion co-doped Titania for Solar Photocatalytic Degradation of Dyes

  • Lee, Young-Seak;Kim, Sang-Jin;Venkateswaran, P.;Jang, Jeen-Seok;Kim, Hyuk;Kim, Jong-Gyu
    • Carbon letters
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    • v.9 no.2
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    • pp.131-136
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    • 2008
  • In order to investigate the effect of doping C, N, B and F elements on $TiO_2$ for reducing the band gap, the heat treatment of $TiO_2$ was carried out with tetraethylammonium tetrafluoroborate. Through XRD and XPS analysis, the C, N, B and F doped anatase $TiO_2$ was confirmed. According to the increase of temperature during treatment, the particle size was increased due to aggregation of $TiO_2$ with elements (B, C, N and F). To investigate the capacity of photocatalyst for degradation of dye under solar light, the degradation of acridine orange and methylene blue was conducted. The degradation of dyes was carried out successfully under solar light indicating the effect of doping elements (B, C, N and F) on $TiO_2$ for reducing the band gap effectively.

Synthesis of Spherical Carbons Containing Titania and Their Physicochemical and Photochemical Properties

  • Oh, Won-Chun;Kim, Jong-Gyu;Kim, Hyuk;Chen, Ming-Liang;Zhang, Feng-Jun;Meng, Ze-Da;Choi, Jong-Geun;Zhang, Kan
    • Journal of the Korean Ceramic Society
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    • v.48 no.1
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    • pp.6-13
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    • 2011
  • In this study, we used activated carbon (AC) and charcoal (CH) as carbon sources with $TiO_2$ powder to prepare spherical carbons containing titania (SCCT) by using phenolic resin (PR) as a bonding agent. The physicochemical characteristics of the SCCT samples were examined by BET, XRD, SEM, EDX, iodine adsorption and compressive strength. The photocatalytic activity was evaluated by measuring the removal efficiency of three kinds of organic dyes: methylene blue (MB), methyl orange (MO) and rhodamine B (Rh.B) under a UV/SCCT system. In addition, evaluation of chemical oxygen demand (COD) of piggery waste was done at regular intervals and gave a good idea about the mineralization of wastewater.

Preparation of Spherical Activated Carbon and Their Physicochemical Properties

  • Oh, Won-Chun;Kim, Jong-Gyu;Kim, Hyuk;Chen, Ming-Liang;Zhang, Feng-Jun;Zhang, Kan;Meng, Ze-Da
    • Journal of the Korean Ceramic Society
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    • v.46 no.6
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    • pp.568-573
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    • 2009
  • In this study, we used coal based activated carbons as starting material and phenolic resin (PR) as a bonding agent to prepare spherical shaped activated carbons. The textural properties of SAC were characterized by BET surface area, XRD, SEM, iodine adsorption, strength intensity and pressure drop. According to the results, the spherical activated carbon prepared with activated carbon and PR at a ratio of 60:40 was found to have the best formation of spherical shape, which was found in sample SAC40. After activation, SAC40 has high BET surface area, iodine adsorption capability and strength value, and lowest pressure drop.