• 제목/요약/키워드: C-SCI

검색결과 684건 처리시간 0.033초

The Spot Scanning Irradiation with $^{11}C$ Beams

  • Urakabe, Eriko;Kanai, Tatsuaki;Kanazawa, Mitsutaka;Kitagawa, Atsushi;Suda, Mitsuru;Iseki, Yasushi;Tomitani, Takehiro;Shimbo, Munefumi;Torikoshi, Masami
    • 한국의학물리학회:학술대회논문집
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    • 한국의학물리학회 1999년도 Japanese Journal of Medical Physics
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    • pp.188-191
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    • 1999
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국내산 소나무로 제조되는 열기계펄프 제조 기술 최적화 연구 (1) - 목재 칩의 전처리와 리파이닝 시 온도와 NaOH 처리의 효과 - (Optimization Technology of Thermomechanical Pulp Made from Pinus densiflora (I) - Effect of Temperature and NaOH at Presteaming and Refining -)

  • 남혜경;김철환;이지영;박형훈;권솔;조후승;이경선
    • 펄프종이기술
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    • 제47권1호
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    • pp.35-44
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    • 2015
  • Thermomechanical pulping process uses large amounts of energy, mostly electricity to run electrical facilities. Thermomechanical pulp (TMP) made from Pinus densiflora also has a big drawback that refining consumes 90 per cent of the total energy used in TMP process. This study explored to draw up a way to save refining energy through different thermal treatment at the stages of presteaming and refining. Presteaming temperature was $80^{\circ}C$, $100^{\circ}C$, and $120^{\circ}C$. After presteaming at each temperature, refining was carried out at $100^{\circ}C$, $120^{\circ}C$, and $140^{\circ}C$ respectively. In a presteaming stage, steaming temperature over $120^{\circ}C$ greatly contributed to the decrease of refining energy leading to earlier attainment of a target freeness, irrespective of refining temperature. In addition, NaOH treatment with presteaming enhanced better development of fiber properties during refining than presteaming without NaOH. High temperature refining at $140^{\circ}C$ produced a high strength paper, and wood chips treated by alkali responded better to refining than at over $120^{\circ}C$. Improved softening effect on wood chips led to the decrease in shives contents but it gave no effect on pitch contents of TMP.

Changes of Rutin Content and Photosynthesis Rate of Korean Buckwheat Cultivars under Various Environmental Stresses

  • Yoon, Byeong-Sung;Kwun, Hyok-Oun;Shin, Sang-Eun;Jin, Cheng-Wu;Yu, Chang-Yeon;Cho, Dong-Ha
    • 한국약용작물학회지
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    • 제11권4호
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    • pp.284-288
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    • 2003
  • This study was conducted to classify photosynthesis rate and changes of rutin content of Korean buckwheat (cv. Chunchon-jaerae and Yangjeul-memil) treated with salinity, UV-C and low temperature. In case of cv. Chunchon-jaerae and Yangjeul-memil, according to the salt stress, transpiration rate, stomatal conductance and photosynthesis rate were decreased. Both cultivars also showed decrease of transpiration rate and photosynthesis rate under the UV-C. Rutin contents within leaf and stem of cv. Yangjeul-memil were decreased when NaCl concentration was high. Rutin contents within leaf and stem of cv. Yangjeul-memil were generally decreased when the time laps under the UV-C stress. Rutin contents within leaf and stem of cv. Chunchon-jaerae was also generally decreased when the time laps under the low temperature stress.