• 제목/요약/키워드: Lewis

검색결과 613건 처리시간 0.031초

The Brassica/Arabidopsis Comparative Genome Browser A Novel Approach to Genome Browsing

  • Lewis Christopher T.;Sharpe Andrew G.;Lydiate Derek J.;Parkin Isobel A.P.
    • Journal of Plant Biotechnology
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    • 제5권4호
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    • pp.197-200
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    • 2003
  • Scalable Vector Graphics (SVG) has enabled a visually appealing, browser-based application for the display of Brassica sequences relative to Arabidopsis thaliana, and there are currently more than 70,000 B. napus Expressed Sequence Tags (ESTs) displayed. The client side of this browser is based on a Custom Graphical User Interface (CGUI) library which uses SVG, a new web graphics standard, to provide windowing functionality inside the web browser. This windowing functionality, combined with asynchronous data retrieval and client side rendering overcomes two of the key technology imposed drawbacks of current web based browsers: Fixed displays and frequent page reloads. The end result is an intuitive and enjoyable browsing experience. The browser is accessible online from the Brassica / Arabidopsis Genomics Initiative (http://brassica.agr.gc.ca). Inquiries about the browser should be directed to LewisCT@agr.gc.ca.

Coupling Reaction of CO2 with Epoxides by Binary Catalytic System of Lewis Acids and Onium Salts

  • Bok, Taekki;Noh, Eun Kyung;Lee, Bun Yeoul
    • Bulletin of the Korean Chemical Society
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    • 제27권8호
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    • pp.1171-1174
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    • 2006
  • Various off-the-shelf Lewis acids in conjunction with various onium salts are screened for coupling reaction of $CO_2$ with epoxides. Among the tested ones, $VCl_3/n-Bu_4NOAc$, $VCl_3/(n-Bu_4NCl$ or PPNCl), $FeCl_3/ n-Bu_4NOAc$, and $FeCl_3/ n-Bu_4NOAc$are proved to be highly active. Propylene oxide, epichlorohydrin, styrene oxide, and cyclohexene oxide can be converted over 90% yields to the corresponding cyclic carbonates without the use of organic solvents under mild conditions by 0.1-1.0 mol% catalyst charge.

글리옥살을 이용한 마직물의 무포름알데히드 방추가공(제 1보)-촉매의 영향 (Nonformaldehyde Anti-crease Finish of Ramie with Glyoxal (Part I))

  • 오경화;홍경화
    • 한국의류학회지
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    • 제22권8호
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    • pp.1060-1068
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    • 1998
  • The effects of various catalysts and softners on the anti-crease finish of ramie with glyoxal were investigated. A number of metal salts commonly used as Lewis acid catalysts in DP finishing of cotton with formaldehyde and N-methylol agents were screened for glyoxal treatment of ramie fabric. Various organic and inorganic acids were mixed with Lewis acid catalyst as co-catalysts to improve catalytic activity. As a result, the combination of aluminum sulfate and citric acid was proven highly effective in catalyzing the crosslinking of ramie cellulose by glyoxal under lower curing temperature. With a mixed catalyst, performance properties, such as whiteness and tearing strength as well as wrinkle recovery of treated ramie fabric were improved as compared with that treated with aluminum sulfate alone. Additional improvement of tearing strength and wrinkle recovery was achieved by applying silicons softner in the treatment bath.

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Strain-specific mammary tumor development following life-time oral administration of Ochratoxin A in DA and Lewis rats

  • Son, Woo-Chan;Lee, Yong-Soon;Kang, Kyung-Sun
    • 한국독성학회:학술대회논문집
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    • 한국독성학회 2003년도 춘계학술대회 논문집
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    • pp.39-40
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    • 2003
  • Ochratoxin A (OA), a potent nephrotoxin in several species, is knownto be a renal carcinogen in animals and is implicated in the etiology of Balkan endemic nephropathy (BEN). The NTP (National Toxicology Program) classified Ochratoxin A as having clear evidence of carcinogenic activity, based on uncommon tubular adenomas and tubular cell carcinomas of the kidney and multiple fibroadenomas of the mammary gland, seen in the rat.(omitted)

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부식성 식도협착 환자에서 식도스텐트 삽입 후 발생한 기관지 식도 누공의 수술적 치료 (Surgical Treatment of Bronchoesophageal Fistula Caused by a Self-Expanding Esophageal Stent)

  • 이재익;우종수;이길수;노미숙
    • Journal of Chest Surgery
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    • 제37권2호
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    • pp.197-200
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    • 2004
  • 식도와 주위 장기 사이의 누공 형성은 자가 확장성 식도스텐트의 잘 알려진 합병증 중의 하나이지만, 기관지 식도 누공을 수술적으로 치료한 보고는 거의 없다. 양성 식도협착 환자에 스텐트를 사용하는 경우가 점점 늘어남에 따라 이러한 후기 합병증의 빈도도 점점 증가할 것이다. 저자들은 최근 부식성 식도협착 환자에서 식도스텐트 삽입 후 발생한 기관지 식도 누공 1예를 경험하였고, 누공절제술과 Ivor Lewis 술식으로 일차성 교정술을 시행하여 좋은 결과를 얻었기에 국내 문헌상으로는 최초로 이를 보고하는 바이다.

상호작용하는 대향류 메탄 및 수소 예혼합화염에서 당량비 조건에 따른 상호작용 모드 변화 (Interaction Mode Change According to the Equivalence Ratios in the Interacting Methane and Hydrogen Counterflow Premixed Flames)

  • 박지웅;오창보
    • 한국연소학회:학술대회논문집
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    • 한국연소학회 2012년도 제44회 KOSCO SYMPOSIUM 초록집
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    • pp.13-16
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    • 2012
  • The interaction between methane and hydrogen premixed flames with the different equivalence ratio and global strain rate was investigated numerically in one-dimensional counterflow field. The OPPDIF code and GRI-v3.0 were used to simulate the interacting flames. Overall trends in the maximum heat release rates of $CH_4{^-}$ and $H_2$-side flame were examined with the variation of $a_g$. The interaction mode of the flames were classified according to the equivalence ratios and Lewis numbers of each flame and global strain rate.

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Antitumor Activity of Cultured Mycelia of Ganoderma lucidum

  • Min, Byung-Sun;Lee, Hyeong-Kyu;Bae, Ki-Hwan;Gao, JiangJing;Nakamura, Norio;Hattori, Masao
    • Natural Product Sciences
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    • 제8권2호
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    • pp.52-54
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    • 2002
  • The cultured mycelia of fungus Ganoderma lucidum were investigated for the inhibitory effect on the growth of s.c. transplanted Lewis lung carcinoma (LLC) in BDF-1 mice by intraperitoneal (i.p.) administration. The cultured mycelia showed antitumor activity with T/C values of 89.6 and 50.3 % at doses of 100 and 500 mg/kg, respectively, compared to adriamycin, which was used a positive control, with T/C value of 54.6 % at 2 mg/kg.

상호작용을 하는 희박-희박 예혼합화염의 소화특성에 관한 연구 (On the Extinction Characteristics of the Interacting Lean-Lean Premixed Flames)

  • 정석호;김종수
    • 대한기계학회논문집
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    • 제10권2호
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    • pp.232-240
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    • 1986
  • 본 연구에서는 대향류 유동장에서 두 예혼합화염의 후류 상호작용을 Fig.1 과 같은 계를 이용하여 일반적인 Lewis수에 대하여 접합 점근 전개 방법으로 해석하 여, 강한 상호작용을 나타내는 구간의 변화가 확산선호도의 영향임을 규명하고, 화염 스트레치가 상호 작용하는 예혼합화염의 소화특성에 미치는 영향을 파악하였다.

한국산 무당벌레붙이과(딱정벌레목: 머리대장상과)의 분류학적 검토 (Taxonomy of Endomychidae Leach (Coleoptera: Cucujoidea) in Korea)

  • 정부희
    • 한국응용곤충학회지
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    • 제53권1호
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    • pp.39-49
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    • 2014
  • 한국산 무당벌레붙이과(Endomychidae Leach)를 분류학적으로 검토하였다. 한국산 무당벌레붙이과에는 3아과, 7속, 10종이 포함되어 있는데, 그 중 Endomychus gorhami (Lewis) Eumorphus quadriguttatus pulchripes Gerstaecker, Lycoperdina castaneipennis Gorham, Mycetina ancoriger Gorham 등 4종을 국내에서 처음으로 보고한다. 또한 Lycoperdina castaneipennis의 숙주버섯을 처음으로 보고한다.

할로겐을 소유한 이원소 고리 화합물에 관한 연구(제 3보) 유기산 또는 Lewis산 존재하에서 이루어진 초산 Furfuryl의 염소화반응 (Halogen Containing Heterocyclic Compounds (Part III) Chlorination of Furfuryl Acetate in Presence of Acid and Lewis Acids)

  • 김유선;이수선;오명원
    • 대한화학회지
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    • 제14권3호
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    • pp.201-206
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    • 1970
  • Furfuryl acetate was chlorinated in presence of acetic acid using carbontetrachloride as the solvent. When the chlorination proceeded at the low concentration of acetic acid, the formation of the tetrachloride was more efficient than that of higher concentration. The chlorination done in presence of various Lewis acids such as aluminum chloride, hydrogen fluoride, and borontrifluoride could not give high yield of tetrachloride, but trichloride. In case of borontrifluoride and hydrogen fluoride, the decomposition of the reaction mixture was apparent. The results were discussed in terms of the stability of furfuryl nucleus towards an electron acceptor and the convenient procedure of preparing trichloro furfuryl acetate was described.

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