http://chineseinput.net/에서 pinyin(병음)방식으로 중국어를 변환할 수 있습니다.
변환된 중국어를 복사하여 사용하시면 됩니다.
溫度 및 生長 調節劑 處理가 덴드로비움 노빌계의 揷木繁殖에 미치는 影響
채수천,손기철 한국화훼연구회 1996 화훼연구 Vol.5 No.2
Effects of temperatures and growth regulators on the shooting and rooting rate on the cutting propagation of Denbrobium nibile Lindle, Yukidaruma 'King' was investigated. The rate of shooting and rooting was increased and sprouting time was promoted by the treatment of high teaperature(30-35℃) but decreased by the treatment of low temperature(15-20℃). In the case of growth regulators(IAA, IBA GA3, and BA) experiment, the rate of shooting and rooting was higher in all growth regulators than control in which 200 ppm BA was the most effective. Finally, it was shown in combination treatments of temperature and growth regulator that application of growth regulator was not suitable for improving shooting and rooting under high temperature condition(30-35C). Under low temperature(20-25C) , however, 200 ppm BA treatment among growth regulators was found to be very effective in increasing shooting and rooting, and promoting sprouting time.
Dendrobium 성숙과 화아분화 시 건물증 및 당 함량 변화
채수천 한국원예학회 2002 원예과학기술지 Vol.20 No.4
Dendrobium nobile계 품종의 지엽발생 후 성숙에 미치는 영향을 조사하기 위하여 Golden Blossom 'Kogane', Yukidaruma 'King', Malones 'Fantasy' 그리고 Snowflake 'Red Star' 4품종의 지엽발생 후 위구경의 건물중, 건물률과 당 함량을 조사한 결과, 건물중은 9월경 지엽발생 직후에 4.2 - 8.3g으로 낮았으나 시간이 경과함에 따라 12.8 - 22.7g으로 급격히 증가되었다. 그러나 Snowflake 'Red Star'는 11월 이후 크게 감소되었다. 건물률도 건물중과 비슷한 경향을 나타내었다. 당 함량의 변화는 fructose, glucose는 지엽발생기에 많았으나 시간이 경과함에 따라 서서히 감소하였고, 비환원당은 지엽발생시기인 9월경 가장 적게 함유되었으나 시간이 경과함에 따라 증가하여 1 - 2월경 최대에 달하였다. Changes of dry weight and sugar content after flag leaf occurrence and during flower bud formation in Dendrobium nobile Yukidaruma 'King', Malones 'Fantasy', Golden Blossom 'Kogane', Snowflake 'Red Star' were investigated. Dry weight and percentage of dry matter were low at the flag leaf occurrence but rapidly increased from 12.8 to 22.7 g as time elapsed. However, dry weight and percentage of dry matter decreased in case of Snowflake 'Red Star' after November. The analysis of sugar content in Dendrobium nobile showed that fructose and glucose content were highest at the stage of flag leaf occurrence and then decreased gradually. Unsoluble sugar content was lower at flag leaf occurrence in September, but reached its maximum in January and February.
고준위 핵폐기물의 고정화를 위한 메트릭스 개발: Ce-파이로클로어 합성 연구
채수천,장영남,배인국,Yudintsev S.V. 대한자원환경지질학회 2002 자원환경지질 Vol.35 No.2
Ce-pyrochlore (CaCeTi₂O7) was synthesized to study its properties and phase relations in CaO-CeO₂-TiO₂system because Ce-pyrochlore was known as a promising material for the immobilization of radioactive actinide. The samples were prepared from the high purity starting materials under the pressure of 200∼400 kg/㎠ at room tem-perature, and annealed at 1000∼1500℃. The Synthesized samples were analysed and identified with XRD and SEM/EDS methods. The optimal formation condition of Ce-pyrochlore was at 1300℃ under O₂atmosphere and the chemical composition of it was Ca1+XCe1-XTi2-yO7-X-2y (x=0.03∼0.05, y=0.02∼0.04). At temperature between 1300∼1400℃, Ce-pyrochlore underwent rapidly the incongruent decomposition to perovskite. Ce-perovskite, a partial solid solution between perovskite and loparite (Ce0.66TiO₃), was observed as a major phase above 1400℃. Ce-파이로클로어(Ce-pyrochlore; CaCeTi₂O7)는 장주기 방사성 폐기물인 악티나이드 원소들을 고정화시킬 수 있는 새로운 물질이므로 Ce-파리로클로어를 합성하여 상평형 관계 및 특성을 연구하였다. 혼합된 시료는 상온에서 200-400 kg/㎠의 압력으로 성형한 후, 1000-1500℃ 범위에서 소결온도 및 분위기를 변화시키면서 소성하였다. 합성된 시료는 WRD, SEM/EDS를 사용하여 상분석과 정량분석을 실시하였다. 실험결과, Ce-파이로클로어의 최적 합성조건은 산소분위기 하에서, 1300℃로 소결하엿을 때였으며, 이때의 화학조성은 Ca1+XCe1-XTi2-yO7-X-2y(X=0.03-0.05, y=0.02-0.04)으로써 비화학양론적인 특성을 보였다. Ce-파이로클로어는 1300-1400℃에서 빠른 비조화 분해현상을 나타내었으며, 1400℃ 이상에서는 페로브스카이트(perovskite)와 로파라이트(loparite; Ce0.66TiO₃) 사이의 부분 고용체인 Ce(III)-페로브스카이트가 주요상으로써 관찰되었다.
Molecular variations in Th1-specific cell surface gene Tim -3
채수천,송주희,Pann Pounsambath,Hai-Ying Yuan,이재훈,김정중,이용철,정헌택 생화학분자생물학회 2004 Experimental and molecular medicine Vol.36 No.3
mucin domain (TIM) proteins is identified to be expresed on T cels. A member of Tim family, Tim-3 (T cell immunoglobulin mucin 3) is selec-tively expressed on the surface of diferentiated Th1 cells. Tim-3 might have an important role in the induction of autoimune diseases by regulating macrophage activation and interacts with Tim-3 ligand to regulate Th1 responses. To determine the variation sites in the coding and promoter region of human Tim-3 gene, we per-formed variation scanning by direct sequencing tients with asthma or allergic rhinitis and heal-thy controls without asthma and allergic rhinitis. We identified four single nucleotide polymor-phisms (SNPs) including one novel SNPs (-1541C>T) and two variation sites (-1292_-1289delTA and -1282_-1278dupTA) in the coding and promoter region of human Tim-3 gene in both the patients and healthy groups.
Association of TBX21 polymorphisms in a Korean population with rheumatoid arthritis
채수천,심승철,정헌택 생화학분자생물학회 2009 Experimental and molecular medicine Vol.41 No.1
TBX21 (T-bet) is a member of the T-box family of transcriptional factors that contain a conserved DNA binding domain. TBX21 is a critical regulator of the commitment to the Th1 lineage and IFN-γ production. Th1 and Th2 cells cross-regulate the differentiation of each other, and in this way TBX21 could be an attractive candidate gene for treating autoimmune disease such as rheumatoid arthritis (RA). In present study, we analyzed the genotypic frequencies of six polymorphisms of the TBX21 gene between the 367 RA patients and the 572 healthy controls. We showed that the g.-1514T>C and c.99C>G polymorphisms are suggestively associated with RA susceptibility. It is interesting that the genotypic frequencies of the TBX21 polymorphisms (g.-1514T>C and c.2103A>C) in the male RA patients were significantly different from the male control group (P = 0.0016 and 0.045, respectively). We also found that the g.-1514T>C and c.2103A>C polymorphisms of the TBX21 gene in the male RA patients have significant association with the levels of anti-CCP (P = 0.05) and rheumatoid factor (P = 0.03), respectively. These results suggest that the polymorphisms of the TBX21 gene might be associated with the susceptibility to male RA patients.