• Title/Summary/Keyword: Reis

Search Result 66, Processing Time 0.024 seconds

Character and Function of Restriction Enzyme, EcoRI Inhibiting Substance Extracted from Spinach Chloroplast and Chlamydomonas (시금치 엽록체와 Chlamydomonas로부터 추출한 제한효소 EcoRI 억제물질의 특성과 작용)

  • 황성빈
    • Journal of Plant Biology
    • /
    • v.33 no.4
    • /
    • pp.217-223
    • /
    • 1990
  • Restriction enzyme inhibiting substance (REIS) extracted from spinach chloroplast and Chlamydomonas seems not to be proteinaceous, because its inhibiting activity was not lost by heat or trypsin treatment. And it seems not to be lipid or polysacchride, because its inhibiting activity was not lost by lipase or $\alpha$-amylase treatment, respectively. In Chlamydomonas, putrescine, spermidine and spermine were present. The amount of putrescine was the smallest and that of spermie was the greatest. But only spermine was contained in REIS and the activity of REIS. It was proportional to the amount of spermine in REIS and it was hindered by Na+ ion. So, the inhibiting activity of REIS seems to be deeply related to spermine contained in REIS. But restriction enzyme inhibiting activity remained to the some extent although salts and spermine were eliminated by dialysis.

  • PDF

Probabilistic Assessment of Wave Overtopping of Seawall at Busan, Korea (부산 신항 방파제의 월파 확률 평가)

  • Qie, Luwen;Choi, Byung-Ho;Xie, ShiLeng
    • Journal of Korean Society of Coastal and Ocean Engineers
    • /
    • v.20 no.2
    • /
    • pp.176-183
    • /
    • 2008
  • In this paper, three classical overtopping models: Owen model, Van der Meer & Janssen model and Hedges & Reis model were used to calculate the failure probability of wave overtopping of seawalls. Among of them, the Hedges & Reis model was regarded as a moderate method to analyze the failure probability of wave overtopping of seawalls and the probabilistic assessments of wave overtopping were carried out for a constructing seawall at Busan in Korea by Level II and Level III reliability methods. Considering the cost of construction, an appropriate crest level was proposed for a certain rate of wave overtopping at a lower failure probability.

The Invention of Reis Telephone and Its Problem of Speech Quality (라이스의 전화기 발명과 통화 음질의 문제)

  • Ku, Ja-Hyon
    • The Journal of the Acoustical Society of Korea
    • /
    • v.29 no.6
    • /
    • pp.395-401
    • /
    • 2010
  • Since Philipp Reis succeeded in sending human voices through electric wires well ahead of Elisha Gray and A. G. Bell etc., he deserves to be acknowledged as the inventor of the telephone. Nevertheless, he did not enjoy any honor for his great invention while he was alive. Since he was working in a scientific community, his work was presented not as a patentable invention but as a scientific discovery. In addition, he used the intermittent electricity in accordance with the experimental tradition in European acoustics, occasioning the speech quality of his telephone to have a fatal shortcoming. On the contrary, Bell, who was a novice in electricity and acoustics, employed variable currents to transmit the sound signals, which guaranteed better speech qualities than Reis's.

Research Evaluation Indicators for Government Supported Research Institutes on Geoscience and Mineral Resources in the New Korean Mission Oriented Evaluation System (임무중심형 종합평가에서 지질자원 분야 출연연구기관의 연구개발 우수성 평가지표 연구)

  • Ahn, Eun-Young;Kim, Seong-Yong;Lee, Jae-Wook
    • Economic and Environmental Geology
    • /
    • v.49 no.4
    • /
    • pp.325-333
    • /
    • 2016
  • The Ministry of Science, ICT and Future Planning (MSIP) introduced its new Mission Oriented Evaluation System (MOES) for government affiliated research institutes and Government Supported Research Institutes (GSRI) on science and technology in 2013. The Korea Institute of Geoscience and Mineral Resources (KIGAM) is the first MOES applied Science and Technology (S&T) GSRI, that has research divisions focusing on geoscience and geological surveys, mineral resources extraction and utilization, petroleum extraction and marine mineral research, and geological applied and environment research. In appling the final evaluation of MOES on KIGAM, we found difficulty classifing the concepts of research excellence and risk (innovativeness) in guidelines of Research Evaluation Indicators (REIs) of MSIP. We have developed quantitative and qualitative indicators that can present research excellence and risk (innovativeness) through the KIGAM World Class Laboratory (WCL) strategy and related studies, innovative research and development guidelines of MSIP (2013a) and honorable R&D failure guidelines of MSIP (2013b). We have applied our developed REIs in KIGAM which handles basic research, applied and development research and public services. Therefore, our developed REIs can be effectively applied in every S&T GSRI.

Using Natural Graphite Heat Spreaders to Increase CCFL LCD Operating Temperatures

  • Norley, Julian;Shives, Gary D.;Reis, Brad;Schober, John
    • 한국정보디스플레이학회:학술대회논문집
    • /
    • 2007.08a
    • /
    • pp.273-276
    • /
    • 2007
  • A natural graphite heat spreader increased the upper operating temperature limit of a CCFL backlit LCD television. A 0-80W heat source was used to simulate additional electronics. Without the heat spreader, internal circuitry shut-down at ${\sim}30;$ no shut-down occurred above 80W with a heat spreader. Additionally, brightness, temperature uniformity, and operating ranges were improved, verified by environmental chamber performance testing at various ambient conditions.

  • PDF