• 제목/요약/키워드: black shape

검색결과 344건 처리시간 0.037초

화합물 박막 태양전지 적용을 위한 $CuInS_2$ 나노분말의 제조 및 특성 평가 (Manufacturing and Characterization of $CuInS_2$ Nanopowder for Compound Thin Film Solar Cell)

  • 이대걸;이남희;오효진;윤영웅;황종선;김선재
    • 대한전기학회:학술대회논문집
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    • 대한전기학회 2009년도 제40회 하계학술대회
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    • pp.2113_2114
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    • 2009
  • Chalcopyrite based sollar cells have received much attention because of their tunable electronic and optical properties. As a typical ternary chalcopyrite material, $CuInS_2$ has been considered as one of the most popular and promising candidates as absorber materials for photovoltaic applications because of its high absorption coefficient and environmental consideration. In this study, $CuInS_2$ powders have been synthesized using polyol process of a mixture of copper nitrate, indium nitrate, and thiourea with various stoichiometric molar ratios in ethylene glycol at $196^{\circ}C$. As boiling time goes by, the color of metal ion mixed solutions were changed transparent green to dark green and finally turned to black by reduction of OH- radicals. The prepared powders were fully characterized using SEM, XRD. The particle shape of black colored powders showed sphere with about 50 nm in particle size compared to those with dark green colored powders showed irregular shape with about $1{\mu}m$ in particle size. The XRD results showed highly crystallized $CuInS_2$.

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Preparation of Rubber Particulates for Micro Dust Study using Cryogenic Crushing

  • Chae, Eunji;Son, Chae Eun;Choi, Sung-Seen
    • Elastomers and Composites
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    • 제54권4호
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    • pp.330-334
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    • 2019
  • Cryogenic crushing techniques have been employed for recycling waste rubber articles and for extracting residual organic additives present in rubber samples. Rubber particulate derived from tire tread abrasion is one of the key components of road dust. Therefore, in this work, we prepared rubber particulates using a cryogenic crusher and characterized their shapes as well as size distributions according to the type of rubber. The rubber particulates exhibited uneven surfaces with the presence of some small pieces. The order of the particle size distribution was observed to be: NR > BR > SBR. Subsequently, carbon black was added; this led to a decrease in the particle size and the shape becoming rougher. The crushed particulates of the carbon black-filled samples comprised agglomerated shapes of small pieces, which were similar in shape to that of wear debris in tire tread. It was discovered that crosslink density was one of the principal factors that led to the formation of small crushed particulates. The small particulates obtained by cryogenic crushing can be utilized as model rubber particulates for researching micro dust.

부자(附子)와 초오(草烏)의 내외부형태(內外部形態)와 패턴분석연구 (A study on morphological and pattern analysis in two kinds of Aconiti Radix)

  • 강준혁;최고야;김홍준;주영승
    • 한국한의학연구원논문집
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    • 제12권1호
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    • pp.23-38
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    • 2006
  • The taxonomic list of specific features in external and internal shape and the pattern analysis of Aconitum carmichalei $D_{EBX}$ as the original plant of Aconiti Lateralis Radix Preparata and Aconitum cliiare Dc as the original plant of Aconiti Ciliare Tuber are as follows. 1. Aconitum carmichalei $D_{EBX}$ has tri-palmately parted leaves, petiole in lower leaves, and its ovary has short hair. Whereas Aconitum cliare Dc has $3{\sim}4$ parted leaves, long petiole, and its ovary has not hair. 2. Aconitum carmichalei $D_{EBX}$ has cylinder shape is relatively small in length and diameter, is greyish brown blacky brown in outer surface, greyish $white{\sim}dark$ gray in section. 3. According to the collection place, there is a remarkable difference in the physical shape of herbal states. Aconiti Lateralis Radix Preparate(medicated in Korea) is more transparent blacky brown color than Aconiti Lateralis Fadix Preparata(medicated in Chian). Also Black Aconi Radix(墨附片) has exodermis and White Aconi Radix(白附片) has not. 4. The internal characteristics entirely correspond to in internal shape described in the literatures, Only it is possible to discriminate between black Aconi Radix(墨附片) and White Aconi Radix(白附片) by the existence of cork layer. The classification between Aconiti Lateralis Radix Preparata and Aconiti Ciliare Tuber makes entirely Tuber makes entirely remarkable difference in the physical shape of cambium layer Namely, in shape of cambium layer the kinds of Aconiti lateralis Radix Prepala has horn-like shape and the kinds of Aconiti Ciliare Tuber has circle-like shape. 5. In the peak of examination substance in comparison to Rt of the index material diterpene alkaloid mesaconitine, aconitine, hypaconitine chromatogram Aconiti Ciliare Tuber is higher than in Aconiti Lateralis Radix Preparata This explain that the component changes after the process of medicine. 6. In the Content of mesaconitine, aconitine and hypaconitime Aconiti Ciliare Tuber is higher than Aconiti Lateralis Radix Preparata. 7. In Aconiti Lateralis Radix Preparata, aconitine, hypaconitine and mesaconitine each appears in Rf 0.46, 0.54, 0.32. But except Aconiti Ciliare Tuber the band does not appear. For the future, such results will be used as the basic source of additional research, and a far-reaching comparative study is needed to distinguish between many kinds of same genus-degree of relatedness.

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20대 남녀의 의복색상 선호에 관한 연구 -대구시내를 중심으로- (A Study on Preference of Men and Women in Their 20s of Clothing Color -In the Taegu Areas-)

  • 은영자;박소희
    • 복식문화연구
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    • 제4권3호
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    • pp.305-323
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    • 1996
  • The purpose of this sty is to forecast the tendency of clothing colors, to provide materials useful for making the color plan for a better costume, and suggest new information in the apparel industry. To achieve these purposes, this study was carried out by suggesting vogue colors of recent apparel, along with the 20 standard colors of Muncell to 350 men and women in their 20s residing in Taegu.. We analysed and compared their preferred colors in suits vidual factor ;age, sex, education ,skin color, and body shape, and additionally classifying their interest in clothing colors, cause for color selection , degree of interest in color of clothes, color satisfaction of apparel market, and color combination of clothing, color satisfaction of apparel market, and color combination of clothing. We compared these elements according to their age, sex, and education. The results of this study is summarized as follows; 1. It was shown that both men and women in their 20s preferred warm colors the first colors mentioned being the most popular ; Pastels, Red, Blue and Black. They disliked dark and sordid colros in the order of Mauve, Khaki and Red. They preferred wearing Pastels and Yellow in the Spring, White, Blue, and Pastels were the favorites for summer, Beige in autumn, and black, Gray, and Beige in winter. The repugnated colors they chose two wear were Black, Red, Mauve, Khaki in spring and summer. Mauve, Red, Yellow were favorites for autumn, and Blue·White, Yellow·Green, and Pastels in winter. 2. The preferred colors for T-shirts were Yellow, Pastels, White in spring. White and Pastels were summer favorites, Beige an Red for autumn, and Black, Red, Beige in Winter. As for suits, the preferred colors in spring were in the order of Pastels, Beige and Yellow. The preferred colors of upper garments in summer were in the order of White and pastels. for lower summer garments Pastels, White and Blue were favorites. In autumn, Beige was shown to be highly preferred, and in winter, the order of preferred colors was Black, Gray and Beige. 3. On of those individual factors showing the greatest difference was sex. 4. Those factors having the greatest impact on the selection of clothing color were the season and their preference color. 5. The in vogue color of men in their 20s was at a higher level than hat of women. The groups that had an upper college level education showed a significant difference in their choices thant hose who were highschool graduates and technical college student and graduates. The consideration of inteterest in color of clothes, holding clothes during new purchasing, body shape and skin color was higher for women than men. In buying and wearing accessaries, women tend to take into consideration the harmony with the garment, and there was shown a significant difference between highschool graduates and the groups above the level of college education.

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국내산 흑탄과 백탄의 해부학적 특성 (Anatomical Characteristics of Black and White Charcoal Manufactured in Korea)

  • 권성민;권구중;이성재;김남훈
    • Journal of Forest and Environmental Science
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    • 제23권1호
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    • pp.57-63
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    • 2007
  • 국내 전통식 탄화로에서 생산된 굴참나무(Quercus variabilis $B_{LUME}$)와 신갈나무(Quercus mongolica $F_{ISCH}$) 흑탄 및 백탄의 해부학적 특성을 주사전자현미경법으로 조사하였다. 흑탄 및 백탄 조재부 도관의 형태는 접선방향으로 수축하여 방사방향으로 긴 타원형을 나타내었으나, 다른 구성세포들의 형태와 구조적인 변형은 보이지 않았다. 만재부 도관은 접선방향으로의 수축은 관찰되지 않았으나, 백탄의 경우 인접세포들의 과도한 수축으로 인해 도관의 형태가 다소 찌그러지는 것이 관찰되었다. 또한 목섬유 부분은 과도한 수축에 의해 세포가 크게 변형된 것을 보여주고 있으며, 조재부도관 내 타일로시스는 백탄과 흑탄에서 모두 관찰되었다. 방사유세포는 세포벽이 상당히 얇아진 모습을 보여주었고, 변형도 심하게 나타났다. 또한 백탄의 경우에는 고온탄화에 의한 세포벽의 수축으로 유세포간 공극이 발생되었다. 단열방사조직과 광방사조직의 경우에는 고온 탄화에 의해 세포벽이 수축하면서 세포내강이 줄어드는 현상이 관찰되었다. 이러한 세포내강이 소실되는 현상은 탄화온도가 높은 백탄에서 자주 관찰되었다. 따라서 흑탄에 비해 백탄의 수율이 낮은 것은 목재성분의 일부 손실뿐만 아니라 탄화온도에 따라 구성세포 치수가 감소하기 때문으로 생각되었다.

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A Study on the Ugliness Images Expressed in Modem Make-Up (Based on the Color Expressions)

  • Byun, Young-Hee;Chae, Keum-Seok
    • 한국복식학회:학술대회논문집
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    • 한국복식학회 2003년도 International Costume Conference
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    • pp.51-51
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    • 2003
  • The purpose of this study is to investigate the trends of, the ugliness images expressed in Modern Make-up from 1995 to 2003, especially focusing on color, and to enlarge the possibility of expressions through formative elements such as shape·texture·details and to anticipate the prospect of the Make-up in the future. The results can be summarized as follows. First, Ugliness is the most negative aesthetic value which is lack of beauty, and ultimate beauty is achieved through the combination of beauty with ugliness. Second, the images of ugliness have been expressed in paintings and fashion. The 20 century paintings, representing the ugly shape are extremely exaggerated with yellow, red, black, blue, white, green. The shape have been distorted, deformed, destroyed. And Pluralism and De-constructivism with its traits of indeterminacy have become the background of ugliness images in Fashion.

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A Testa Extract of Black Soybean (Glycine max (L.) Merr.) suppresses Adipogenic Activity of Adipose-derived Stem Cells

  • Jeon, Younmi;Lee, Myoungsook;Cheon, Yong-Pil
    • 한국발생생물학회지:발생과생식
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    • 제19권4호
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    • pp.235-242
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    • 2015
  • Black soybean teata is helpful to preventing obesity through enhancing energy expenditure and suppressing accumulation in mesenteric adipose tissue. The ethanol testa-extract of Cheongja #3 black soybean (ETCBS) is also have similar effects on obesity. So far, it is not clear whether the ethanol testa extract of black soybean can have effect on the characters of subcutaneous adipose stem cells such as proliferation, activity, and adipogenicity. The doubling time was different between subcutaneous adipose-derived stem (ADS) and visceral ADS cells. By the in vitro culture and passage, the doubling time was increased both of them. The shape was not different between groups and their passages were not cause the change of shapes. In the case of visceral ADS cells, the doubling time was 62.3 h or 40.3 h in control or high fat diet administrated mice, respectively, but not modified in subcutaneous ADS cells. ETCBS administration caused of increased the doubling time from 62.3 h to 84.2 h. ETCBS had suppressive effects on the cellular activity of subcutaneous ADS cells. The intensity of Oil Red O staining was very faint in 100 and $200{\mu}g/mL$ ETCBS treated groups. The amounts of accumulated triglyceride were also significantly low in 100 and $200{\mu}g/mL$ treated groups. From these results we know that the doubling times and the effects of ETCBS are different by the anatomical origin of ADS cells. It also suggested that ETCBS may suppress the differentiation of subcutaneous ADS cells into the precursors and maturing of adipocytes.

배나무 검은무늬병균(Alternaria kikuchiana Tanaka)에 병원성분화와 저항성품종의 이병화 (Differentiation in Pathogenicity of Alternaria kikuchiana Tanaka, Black Spot Fungus of Pear, and Conversion of Resistant Varieties into Susceptible ones)

  • 기운계;박서기;조백호;김기청
    • 한국응용곤충학회지
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    • 제23권1호
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    • pp.7-14
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    • 1984
  • 전남 나주지방에서 만연하고 있는 검은무늬 병 유사증상을 조사한 결과는 다음과 같다. 1. 병원균은 Alternaria kikuchiana Tanaka로 동정되었다. 2. 5월 하순부터 발병되기 시작하여 6월 하순$\~$7월상순에 가장 심하였고 9월 상순에 다시 증가하였다. 3. 이병은 조사품종들의 성엽에 발생하였으나 20세기에서만 유엽에 많이 발생하였다. 5. 이 병은 나주시험장에 있는 거의 모든 품종에 발병하였는데 종래 저항성품종으로 알려진 신흥, 만3길등은 가장 심한 발병을 보였고 이병성품종으로 알려진 조옥, 박다청등은 약간 발병하거나, 전혀 발병하지 않았다. 6. 이상의 결과로 미루어 보아 검은무늬병균에 병원성의 분화가 일어난 것으로 판단된다.

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Colletotrichum gloeosporioides, C. coccodes 및 C. acutatum에 의한 복분자딸기 탄저병 (Anthracnose of Black Raspberry Caused by Colletotrichum gloeosporioides, C. coccodes, and C. acutatum in Korea)

  • 김주희;정우성;정성수;이기권;이희권;이왕휴
    • 식물병연구
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    • 제18권1호
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    • pp.62-64
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    • 2012
  • 2003년부터 2009년까지 전북 고창지역에 재배하는 복분자에서 탄저병이 발생하였다. 탄저병은 처음에 흑갈색의 작은 원형반점들이 잎자루와 줄기에 나타나고 병반이 커지거나 융합되어 불규칙한 병반에 나타난 반점은 대개 원형이나 타원형으로 융합되거나 진전되어 불규칙한 병반을 형성하기도 한다. 탄저병징에서 분리한 병원균은 배양형태적 특성조사 결과 Colletotrichum gloeosporioides, C. cocode, C. acutatum로 동정되었다. 분리된 C. gloeosporioides, C. cocodes, C. acutatum 3종의 병원균은 인공접종에 의한 병원성 검정에서도 동일한 병징을 나타냈다.

컴퓨터를 이용한 장식사의 구조 요인에 따른 직물이미지 제작에 관한 연구 (A Study on Making Fabric Images According to Fancy Yarn Structures Using the Computer)

  • 설정화
    • 한국의류산업학회지
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    • 제7권1호
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    • pp.56-62
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    • 2005
  • Fancy Yarn has developed diverse textures in fabrics, reducing the time in yarn and fabric production or apparel making in order to develop creative goods. In this study aimed to propose the use of a 4D box system to make fancy yarn shapes with loops, knops and spirals and the like. The change in texture was analysed and simulated to produce a suitable fabric image by using the fancy yarns fabric. The results are as follows. The plain weave, 2/2 basket weave, 2/2 twill weave, 2/2 2 complete broken weaves, and 5 harness sateen weaves were woven and a fabric image formed. In the case of the loop and the knop yarns fabric image, compared to the twisted fabric image the surface was covered by loops or some parts became partially black. In the case of the spiral shape it showed pattern continuity in spiral shapes 1, 2 and 3. The more twisted spirals produced a diamond shaped pattern or a twill line and a herring bone shaped twill line. An evenly distributed black fabric image appeared in 5 harness sateen weave. For the loop shape the broken weave or 5 harness sateen weave was produced; basket weave and broken weave for the knop yarn 1 or knop yarn 2; and for the spiral shape a plain fabric or 5 harness sateen weave were produced much similar to the fabric image. The surface texture of the mapped image compared to the twisted fabric image produces fancy yarn fabric images covered with loops or irregular spots caused by the knop and the spiral. Therefore it is appropriate or suitable for the simulation of tweed or woolen wool fabrics. The fabric image which produced consistent and continuous lines is therefore more suitable for simulations of twill or herringbone fabric images.