• Title/Summary/Keyword: C-Lab

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Quenching rate controlled Laser Annealing (QLA) for poly-Si TFT fabrication

  • Han, Gyoo-W.;Alexander, Voronov;Ryu, S.G.;Kim, H.S.;Roh, C.L.
    • 한국정보디스플레이학회:학술대회논문집
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    • 2005.07b
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    • pp.897-897
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    • 2005
  • We report QLA (Quenching-rate controlled Laser Annealing) system as new concept using pulsed DPSSL and CW lasers. This process can control temperature quenching-rate of poly-Si crystallization by additional CW laser and fabricate high quality poly-Si with faster scanning speed than conventional processes. In this paper, QLA system, the experimental results and theoretical discussion will be introduced.

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Temperature Dependence of Resistivity in As Implanted LPCVD Polycrystalline Silicon Films (LPCVD로 제조된 다결정실리콘에 As를 주입한 시료의 비저항에 대한 온도의존성 연구)

  • Ha, Hyoung-Chan;Kim, Chung-Tae;Ko, Chul-Gi;Chun, Hui-Gon;Oh, Kye-Hwan
    • Korean Journal of Materials Research
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    • v.1 no.1
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    • pp.23-28
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    • 1991
  • The resistivity of polycrystalline silicon film deposited by low pressure chemical vapor deposition and doped by arsenic Implantation has been investigated as a function of dopant concentration and testing temperature ranging from $25^{\circ}C$ to $105^{\circ}C$ . The resistivity vs. doping concentration curve had a peak point with highest activation energy with respect to the dependence of the resistivity on temperature. We showed that $O_2$ plasma anneal followed by heat-treatment in $N_2$ ambient was able to recover the resistivity degraded by the plasma deposited passivation layers.

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Antifungal Activity of Lactic Acid Bacteria Strains Isolated from Natural Honey against Pathogenic Candida Species

  • Bulgasem, Bulgasem Y.;Lani, Mohd Nizam;Hassan, Zaiton;Yusoff, Wan Mohtar Wan;Fnaish, Sumaya G.
    • Mycobiology
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    • v.44 no.4
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    • pp.302-309
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    • 2016
  • The role of lactic acid bacteria (LAB) in honey as antifungal activity has received little attention and their mechanism of inhibitory of fungi is not fully understood. In this study, LAB were isolated from honey samples from Malaysia, Libya, Saudi Arabia, and Yemen. Twenty-five isolates were confirmed LAB by catalase test and Gram staining, and were screened for antifungal activity. Four LAB showed inhibitory activity against Candida spp. using the dual agar overlay method. And they were identified as Lactobacillus plantarum HS isolated from Al-Seder honey, Lactobacillus curvatus HH isolated from Al-Hanon honey, Pediococcus acidilactici HC isolated from Tualang honey and Pediococcus pentosaceus HM isolated from Al-Maray honey by the 16S rDNA sequence. The growth of Candida glabrata ATCC 2001 was strongly inhibited (>15.0 mm) and (10~15 mm) by the isolates of L. curvatus HH and P. pentosaceus HM, respectively. The antifungal activity of the crude supernatant (cell free supernatant, CFS) was evaluated using well diffusion method. The CFS showed high antifungal activity against Candida spp. especially The CFS of L. curvatus HH was significantly (p < 0.05) inhibited growth of C. glabrata ATCC 2001, C. parapsilosis ATCC 2201, and C. tropicalis ATCC 750 with inhibitory zone 22.0, 15.6, and 14.7 mm, respectively. While CFS of P. pentosaceus HM was significantly (p < 0.05) effective against C. krusei, C. glabrata, and C. albicans with inhibition zone 17.2, 16.0, and 13.3 mm, respectively. The results indicated that LAB isolated from honey produced compounds which can be used to inhibit the growth of the pathogenic Candida species.

Intraspecific Morphological Characteristics and Genetic Diversity of Korean Calanthe

  • Cho, Dong-Hoon;Chung, Mi-Young;Jee, Sun-Ok;Kim, Chang-Kil;Chung, Jae-Dong;Kim, Kyung-Min
    • Korean Journal of Plant Resources
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    • v.23 no.6
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    • pp.541-549
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    • 2010
  • The present study researched morphological characteristics and analyzed the genetic diversity by using RAPD in Calanthe species, native plant in Jeju, Korea. Twenty-six samples were selected by flower color, and 19 horticultural traits were investigated to study morphological characteristics. The C. discolor had the smallest leaf, the length and width of dorsal sepal, lateral sepal, petal, central lip, lateral lip, and flower stalk length were shortest and/or smallest except the spur and ovary length in Calanthe species, but those of Calanthe discolor for. sieboldii (Dence.) Ohwi (Calanthe discolor for. sieboldii) were the largest and/or biggest, and those of variants were the intermediate between C. discolor and C. discolor for. sieboldii, but spur length was the longest in C. discolor, the shortest in C. discolor for. sieboldii, and intermediate in the variants. Ovary length in C. discolor was shortest and C. discolor for. sieboldii and variants were similar with each other. The flower colors of C. discolor were brownish red, the value of CIE Lab was between 40 and 50. The flower color of C. discolor for. sieboldii was yellowish; the value of CIE Lab was between 110 and 130. And variants had various colors between 50 and 70 in the value of CIE Lab. After analyzing multiple band patterns of PCR products, 154 bands were selected as polymorphic RAPD markers. The analysis of Genetic distance of Calanthe species using RAPD showed that C. discolor and C. discolor for. sieboldii are more distant from each other than variants, and demonstrated the fact that genetic position of variants is between the other two species.