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김효종(Hyo Jong Kim),김윤화(Youn Hwa Kim),정혜전(Heo Jeon Cheong),동석호(Seok Ho Dong),김배영(Bae Young Kim),김병호(Byung Ho Kim),이정일(Joung Il Lee),장영운(Young Woon Chang),장린(Rin Chang),양문호(Moon Ho Yang) 대한소화기학회 1996 대한소화기학회지 Vol.28 No.1
N/A Background/Aims: Multiple genetic alterations in tumor suppressor genes(APC, MCC, DCC, p53) and oncogenes(K-ras) have been implicated in the development of colorectal carcinomas(CRCs). Recently, mutator genes(hMSH2, hMLH1, hPMS1, hPMS2), which are characterized by the development of particular form of genetic instability, termed RER(replication error) was reported in CRCs. It is postulated that RER may be required for multiple genetic alterations in the development of CRCs. But the mode of genetic alterations caused by RER is not certain. To evaluate the mode of genetic alterations caused by RER in multistage carcinogeneis, we compared the frequency of p53 expression, known to be involved in the pathogenesis of CRC, in two groups of tumors. RER(+); those demonstrating RER, and RER( ); those lacking such genetic alterations. Methods: RER test at microsatellite loci; DNA was extracted from normal and tumor tissues using cryostat sectioning method. Purified DNA was subjected to a PCR-based technique in which(CA)n repeat sequence were amplified and RERs were detected when a change in allele length was detected. Immunohistochemical analysis of p53 expression; Deparaffinized section of formalin-fixed tumor tissue samples were immunostained for p53 protein, using a monoclonal p53-specific DO7 antibody. Results: The frequency of RER in sporadic CRC was 40.1%(9/22). P53 expression was observed in 6 of 18 carcinoma(33.3%). The frequency of p53 immunostaining was lower in tumors demonstrating RER(25% vs. 40%). All tumor demonstrating RER at multiple loci did not exhibited p53 immunostaining. Conclusions: These results suggest that RER is likely to play an important role in the pathogenesis of CRCs probably by the different mode of genentic alterations from those lacking RER. (Korean J Gastroenterol 1996;28: 36-46)
황명근(Myung-Keun Hwang),이세현(Se-Hyun Lee),신상욱(Sang-Wuk Shin),조미령(Mee-Ryoung Cho),양승용(Seong-Yong Yang),정관진(Kwan-Jin Jung),배영진(Young-Jin Bae) 한국조명·전기설비학회 2007 한국조명·전기설비학회 학술대회논문집 Vol.2007 No.5월
광속구에서 광원(light source)의 광속(luminous flux)을 측정할 때, 통상적인 측정환경의 변화는 보조램프(aux. lamp)를 사용하여 그 차이를 보정할 수 있다. 그러나 PLS(plasma lighting system)와 같이 표준광원과 시료광원의 위치가 크게 다를 경우에는 그에 따른 광속변화를 직접 측정하고 보정계수를 산출ㆍ반영하거나 시료광원의 측정위치와 동일한 위치에서 Calibration을 시행해야 할 것이다. 따라서 본 논문에서는 광속구에서의 기존 광원의 광학적 특성치를 통하여 새롭게 개발되는 광원류에 대한 부 표준램프를 제작 실험한 결과를 제시한 것이다. 광속구에서의 광특성은 센터와 사이드 측정방식에 의한 특성결과치를 기준으로 보정계수를 구하고 부 표준램프를 제작하였다.