• Title/Summary/Keyword: morphological properties

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Structural Properties of Polyaniline Blended with PNIPAM

  • Neupane, Kosh-Prasad;Ha, Jin-Wook
    • Journal of the Korea Academia-Industrial cooperation Society
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    • v.4 no.3
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    • pp.209-213
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    • 2003
  • Polyaniline (PANi) composite particles were synthesized by chemical oxidation polymerization of aniline in presence of poly-n-isopropyl acryl amide (PNIPAM). The PANi particles formed in the reaction medium deposited onto non-conducting PNIPAM template to produce PANi-coated composite particles. The formation of composite was confirmed by FT-IR spectroscopy, and UV-VIS spectroscopy, and their morphological structures were examined by scanning electron microscopy (SEM). From the experimental results, it was determined that PANi was successfully coated onto non-conducting PNIPAM.

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Screening of Giberella sp. from the Korean Paddy Field for the roduction of Gibberellic Acid and its Cultural Properties (Gibberellic acid를 생산하는 분리주 Gibberella sp. 의 배양학적 특성)

  • 오영준
    • Microbiology and Biotechnology Letters
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    • v.23 no.2
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    • pp.119-122
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    • 1995
  • A different form from Gibberella fujikuroi was isolated from the paddy field of Naju area. The strain, designated as Y107, was identified as Gibberrella sp. based on its morphological, physiological, and biochemical characteristics. The highest production of Gibberellic acid by the strain was achieved in a fermentation medium containing corn starch, glucose, soybean oil, soybean meal, NH$_{4}$NO$_{3}$, K$_{2}$HPO$_{4}$, MgSO$_{4}$, and trace elements.

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A Study on the Rheological and Morphological Properties for Immiscible Blends of Polyethylene and Nylon 6 (폴리에틸렌과 나일론6의 비상용 블렌드의 유변학적.형태학적 특성에 관한연구)

  • 홍성일
    • The Korean Journal of Rheology
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    • v.5 no.1
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    • pp.23-33
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    • 1993
  • 저밀도폴리에틸렌과 나일론6의 블렌드가 용융압출기의 사용에 의해 제조되었다. 제 조된 비상용 블랜드의 유변학적, 형태학적 분석을 통하여 이들사이의 상관관계를 조사하였 다. 전단속도, 계면장력, 용융점도, 분산상의 농도들에 대한 분산상의 크기의 의존성을 평가 하였다. 한편 신장유동에 의한 모폴로지 변화를 조사하기 위하여 기제조된 블렌드를 사용하 여 용융방사를 하였다. 이러한 방식실험으로부터 본연구에 사용된 저밀도 폴리에틸렌과 나 일론6는 분산상과 연속상의 신장점도의 상대적 크기에 무관하게 피브릴화가 되어 방사 연신 비의 증가에 의해 매우 가는 분산된 피브릴을 얻을수 있었다.

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Conducting Polyaniline-Titanium Dioxide Nanocomposites Prepared by Inverted Emulsion Polymerization

  • Karim, Mohammad Rezaul;Lee, Hyun-Woo;Cheong, In-Woo;Park, Sung-Min;Oh, Weon-Tae;Yeum, Jeong-Hyun
    • Proceedings of the Korean Society of Dyers and Finishers Conference
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    • 2009.03a
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    • pp.158-159
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    • 2009
  • Conducting polyaniline (PAni)-titanium dioxide ($TiO_2$) nanocomposites have been synthesized by the inverted emulsion polymerization method. The resultant PAni-$TiO_2$ nanocomposites are characterized with their structural, morphological, conducting and optical properties.

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Studies on the Yeasts Isolated from Kimchi (김치에서 분리한 효모에 관한 연구)

  • 최국지
    • Korean Journal of Microbiology
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    • v.16 no.1
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    • pp.1-10
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    • 1978
  • In order to isolate and identify of the yeasts in Chinese cabbage Kimchi, was propared and fermented by traditional methods. 40 strains of the yeast were isolated from the Kimchi juice. As the results of the serial experiemnts on morphological, cultural and physiological properties, according to the methods of Lodder, Irzuka, Barnett and Hasegocwa, 13 species of S genera were identified as the followings ; Brettanomyces claussenii, Candida bogoriensis, C.cacaoi, C.guilliermondii, Citeromyces matritensis, Kluyveromyces vaeronae, Pichia membranaefacience, Rhodtorula glutinis, Saccharomyces bayanus, S, cerevisiae, S. pretoriensis, S. italicus, and Torulopsis salmanticensis.

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Features of Epitaxial Garnet Films for an Atomic Traps Technique

  • Berzhansky, V.N.;Vishnevskii, V.G.;Nedviga, A.S.;Nesteruk, A.G.
    • Journal of Magnetics
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    • v.14 no.3
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    • pp.108-113
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    • 2009
  • High-coercive garnet films have certain parameters suitable for creating reconfigurable magnetic atomic chips with visible geometry. However, the inner stresses and morphological properties, namely, networks of dislocations, layering and surface relief, and dependence of coercivity on thickness must be taken into account. Select features of films important for atomic trap creation have been studied experimentally and the supposed traps concept provided.

Measurement of Morphological Properties of Tree Seedlings Using Machine Vision and Image Processing (컴퓨터 화상처리(畵像處理)에 의한 묘목(苗木)의 형태학적 성질 측정)

  • Suh, S.R.;Miles, Gaines E.
    • Journal of Biosystems Engineering
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    • v.14 no.3
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    • pp.188-195
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    • 1989
  • 컴퓨터 화상처리(畵像處理)에 의한 묘목(苗木)의 형태학적 성질을 측정하기 위하여 화상포착방법과 화상처리 기술 및 관련 연산법을 개발하였다. 이러한 방법에 의한 측정결과를 기존의 측정방법에 의한 측정결과와 비교하여 그 정밀도(精密度)를 분석(分析)하였으며, 컴퓨터 화상(畵像)에 의한 측정방법의 장점을 고찰하였다.

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Structural Properties of polyaniline blended with PNIPAM

  • Neupane, Kosh-Prasad;Ha, Jin-Wook
    • Proceedings of the KAIS Fall Conference
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    • 2003.06a
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    • pp.334-336
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    • 2003
  • Polyaniline(PANi) composite panicles were synthesized by chemical oxidation polymerization of aniline in presence of Poly-N-Isopropyl acryl amide(PNIPAM). The PANi panicles are formed in the reaction medium deposited onto non-conducting PNIPAM template to produce PANi-coated composite panicles. The formation of composite was confirmed by FT-IR spectroscopy, and UV-VIS spectroscopy, and their morphological structures were examined by scanning electron microscopy(SEM). From the experimental results, it was determined that PANi was successfully coated onto non-conducting PANIPAM.

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Physical Properties of Pericarp in a Walnut Cultivar, 'Yongdong' (호도나무 '영동' 품종 과피의 물리적 특성)

  • Lee, Uk;Lee, Moon-Ho;Byun, Kwang-Ok;Jung, Myung-Suk
    • Journal of Korean Society of Forest Science
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    • v.96 no.4
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    • pp.455-461
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    • 2007
  • This research was processed on morphological and physical characteristics of 'Yongdong' cultivar nuts. (1)Morphological properties of 'Yongdong' cultivar nuts were significantly different from the control, native species, in respect of all properties. (2) 'Yongdong' cultivar nuts showed higher figures than the native species on 9 items of morphological properties (kernel weight, size, length and width of pad on suture and etc.), whereas other 6 items (height of pad on suture, thickness of shell and septem, fragment numbers of isolated kernel, roundness index, and etc.) showed lower figures than those of the control. (3) In physical properties of the nut shells, 'Yongdong' cultivar was superior to the control at all items with the exception of compressive prove distance. Accordingly, it was also verified as effective cultivar of shelled walnut with suture line direction applied the minimum strength. (4) 'Yongdong' cultivar, 21.9 kg, was approximately twice lower than the control, 42.6 kg, on maximum compressive weight. It was demonstrated that the 'Yongdong' cultivar characterized by easily crushing shell by small strength was great in cracking properties. (5) On the study of yield strength, the native species being twice higher than 'Yongdong' cultivar showed the properties of the small elasticity and the shell hardness. While, the suture line of 'Yongdong' cultivar having the lowest yield strength 15.6 kg and 16.0 kg was identified the shell crushed easily. (6) The movement distance of the compressive prove of 'Yongdong' cultivar, 4.2 mm, was longer than that of the control, 2.7 mm. Subsequently, it means that the amount of loss possibly occurring to distribution process was not great, whereby productive value was high. (7) The compressive strength of the suture line of 'Yongdong' cultivar, $9.1kg/cm^2$, was much lower than total average of that $12.4kg/cm^2$. It was also statistically different with other properties. (8)The hardness examination by the compressive position revealed that the suture line of 'Yongdong' cultivar, $149.8kg/cm^2$, was lowest in contrast with the control, $300.9kg/cm^2$.