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브레이크페드에 함유된 연마재의 성분변화에 따른 마찰특성 연구
서영철(Young Chul Seo),정진오(Jin Oh Chung),박정환(Jung Hwan Park) 한국자동차공학회 2005 한국자동차공학회 춘 추계 학술대회 논문집 Vol.2005 No.11_3
To access the influence of a type and content of abrasive materials on friction characteristics, five kinds of specimens with different abrasive components were specially manufactured by a company for this study. Specimens have different abrasive components as ZrSiO₄, Zeolite, ZrO₂, Al₂O₃, while keeping other components fibers, binders, lubricants, fillers, besides the same. The specimens were tested using a 1/5 scale brake dynamometer to analyze the friction characteristics of the abrasive material. After the friction test, rotors of specimens were cut and polished to observe transfer film formation on the rotor surface by SEM, and the EDX analysis is followed to study the component variation through the transfer film thickness.
HPLC를 이용한 carbamate계 농약의 다성분 동시분석
송영각 ( Young Gak Song ),서영철 ( Young Chul Seo ),현공율 ( Gong Yul Hyun ),조우영 ( Woo Young Cho ),이종인 ( Jong In Lee ) 한국가축위생학회 2003 韓國家畜衛生學會誌 Vol.26 No.2
To explore the most sensitive and useful method for simultaneous determination of 8 carbamate pesticides in livestock productions, the mixture of 8 carbonates was determined by HPLC with scanning fluorescence detector. For mobile phase water, acetonitrile and methanol program gradient showed more applicable sensitivity than water and acetonitrile program gradient used ExW 339nm and EmW 445nm for fluorescence detector. On using carbamate columns, the retention time was within 4 to 20 minutes. And this made it possible to separate and detect simultaneously. Therefore we could analyze it exactly and efficiently and reduce time. The preparation process of MSPD method showed that the high recovery rate was more than 88.5% in most of the carbamate pesticides. Therefore we could say that it was an efficient and fast method analyzing out of lots of samples.
H. pylori에 감염된 소화성궤양 치료에 관한 문헌고찰 : 近來 中醫雜誌를 中心으로 Chinese medicine journal put first in importance
서영철,임성우,이원철 동국대학교 한의학연구소 1998 東國韓醫學硏究所論文集 Vol.7 No.1
소화기 질환중 다수를 차지하고 있는 소화성궤양의 발병원인이 H.pylori로 많이 발생한다고 보고되는 현재. 부작용을 최소화 하고 치료율을 높이기 위한 변증치료를 최근 보고된 문헌을 통해 고찰하고 향후 H.pylori 감염에 의한 소화성궤양 치료의 연구 방향을 제시해 본다. The lastest date, increasing H. pylori infected gastric ulceration is indispensible with treatment of Herb medicines. Because the lessor side and the mere cure rate are necessary on clinical treatment. Thus, recently herd medicines of Chinese medical treatment exhibit the method of prescription. Therefore, I think the various prescription will be applied to H. pylori infected gastric ulceration on foward.