• 제목/요약/키워드: Morphological Characterization

검색결과 584건 처리시간 0.025초

Validation of Adsorption Efficiency of Activated Carbons through Surface Morphological Characterization Using Scanning Electron Microscopy Technique

  • Malik, Ruchi;Mukherjee, Manisha;Swami, Aditya;Ramteke, Dilip S.;Sarin, Rajkamal
    • Carbon letters
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    • 제5권2호
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    • pp.75-80
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    • 2004
  • The studies on activated carbon prepared from walnut shell and groundnut shell were undertaken to ascertain the effect of initial state of precursor and activation process on the development of porosity in the resulting activated carbon. Walnut shell based carbon shows the presence of cellular pores while Groundnut shell based carbon shows fibrillar pore structure. The adsorption parameters, characterization of product and scanning electron microscopic studies carried out showed the presence of mainly Micro, Meso and Macro porosity in carbon prepared from Walnut shell while mainly micro porosity was observed in Groundnut shell based activated carbon. An interrelationship between the adsorption efficiency and porosity in terms of quality control parameters, for before and after activation, was validated through the scanning electron microscopic data.

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에치슨법에 의한 탄화규소 휘스카의 성장과 특성분석 (Formation and Characterization of Silicon Carbide Whiskers by Acheson Method)

  • 주한용;김형준
    • 한국세라믹학회지
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    • 제27권1호
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    • pp.136-146
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    • 1990
  • Whiskers of SiC were grown from the mixture of silica and graphite powders by Acheson method(direct heating method). The structrua, morphological and chemical characterizations have been performed by X-ray diffractometer(XRD), transmission electron microscopy(TEM), optical microscopy(OM), scanning electron microscopy(SEM), X-ray photoelectron spectroscopy(XPS) and energy dispersive spectrometer(EDS). The growth mechanism of SiC whiskers is also discussed.

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전기방사한 폴리술폰 부직포의 형태학적 특성 (Morphological Characterization of Polysulfone Nonwoven Prepared by Electrospinning)

  • 차동일;정윤호;김학용;이덕래;김효대
    • 한국섬유공학회:학술대회논문집
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    • 한국섬유공학회 2002년도 봄 학술발표회 논문집
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    • pp.381-383
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    • 2002
  • 폴리술폰은 내화학성, 내멸균성, 내가수분해성, 내열성, 강인한 기계적 성질, 내충격성이 우수한 재료로 치수정밀도와 치수안정성이 매우 뛰어난 고분자이다 이런 뛰어난 특성으로 인해 필터 플레이트, 한외여과장치(기체 분리막), 전기ㆍ전자공업분야(전기콘센트소재), 의료용 분야(인공치골, 인공신장기용 박막, 고온에서의 멸균을 필요로 하는 수술용 받침대, 혈액투석용 필터 등) 등 여러 분야에서 이용되고 있다. (중략)

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충치에서 분리한 Streptococci에 관하여 (Characterization of Streptococci Isolated from Human Dental Plaque)

  • 이건주;이배함
    • 미생물학회지
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    • 제17권3호
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    • pp.131-136
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    • 1979
  • 충치 sample 50개에서 46 strains의 Streptococcus sp.를 분리하여 그 생리적 특징을 조사한 바 1. 대부분의 균주들이 non-haemolytic strain이었으며, 2. 기질로 maltose, inulin, mannitol, sorbisI, lactose, mannabinose를 분해하여 산을 생성하고 arabinose와 xylose는 균주에 따라 차이를 보였으며, 3. Sucrose broth에서는 거의 gel을 형성하였다.

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Syntheses and Characterization of Columnar Discotic Liquid Crystals Based on TTF Core for Organic Electronic Materials

  • Wang, Lei;Jeong, Kwang-Un;Lee, Soo-Hyoung;Lee, Myong-Hoon
    • 한국정보디스플레이학회:학술대회논문집
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    • 한국정보디스플레이학회 2008년도 International Meeting on Information Display
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    • pp.1477-1479
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    • 2008
  • We report the first TTF compounds having columnar LC phase at room temperature. Based on the thermal, structural, and morphological observations, it was concluded that TTF derivative with long alkyl chains has highly ordered oblique columnar LC at room temperature. The new TTF derivatives have excellent oxidative stability which is desirable for a p-type (hole transport) materials.

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Characterization of Rhizodermea veluwensis Isolated from the Roots of Rhododendron mucronulatum in Korea

  • Park, Hyeok;Eom, Ahn-Heum
    • 한국균학회지
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    • 제45권2호
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    • pp.102-106
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    • 2017
  • A fungal strain was isolated from surface-sterilized roots of Rhododendron mucronulatum, a plant species belonging to the Ericaceae family, collected from Mt. Minjujisan, Korea. This fungal strain was identified as Rhizodermea veluwensis based on its morphological characteristics and based on phylogenetic analysis of its internal transcribed spacer regions and large-subunit rDNA. R. veluwensis has not been previously reported in Korea, and for the first time, we report and describe it herein.

The Structural Characterization of the Putative DNA-Binding Protein BldB from Streptomyces Lividans

  • Ochiriin, Tsogbadrakh-Mishig;Kang, Sa-Ouk
    • 한국생물물리학회:학술대회논문집
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    • 한국생물물리학회 2002년도 제9회 학술 발표회 프로그램과 논문초록
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    • pp.49-49
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    • 2002
  • Mutants blocked at the earliest stages of morphological development in Streptomyces species are called bld mutants. We have cloned bldB gene ORF from Slividans. Genomic Southern blot analysis for main strains S.lividans, S.seoulensis, S.coelicolor A3(2), and S.griseus indicated that bldB gene is conserved in all main Streptomyces strains.(omitted)

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