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Sequence sampling에 의한 단결정(Al_2O_3) 성장 제어
조현섭,송용화,민병조 호서대학교 반도체제조장비국산화연구센터 2000 학술대회 자료집 Vol.2000 No.1
It is a quite quality concerning to control temperature of single crystalline it does when you get most of heat treating products. It is also important control temperature when you make the Al203(single crystalline) used to jewels, glass of watches, heat resistant transparent glasses. Thus, it is a ma, to get the proper temperature in accordance with the time process while making mixture of oxygen and hydrogen to have the right temperature. In we will study of electrical valve positioning system for the gas mixture to im quality of products.
조현섭,민병조 호서대학교 반도체제조장비국산화연구센터 2001 반도체장비학술심포지움 Vol.2001 No.-
Robust control far DC motor is needed according to the highest precision of industrial automation.It is a quite quality concerning to control temperature of single crystalline growth as it does when you get most of heat treating products.It is also important factor to control temperature when you make the A1203(single crystalline) used to artificial jewels, glass of watches, heat resistant transparent glasses.Thus, it is a major interest to get the proper temperature in accordance with the time process while you are making mixture of oxygen and hydrogen to have the right temperature.In this paper, we will study of electrical valve positioning system for the gas mixture to improve the quality of products.
다발성 외상 환자에서 Emergency Room Transfusion Score (ETS)를 이용한 응급수혈의 예측인자
조현규 ( Hyeon Kyu Jo ),박용진 ( Yong Jin Park ),김선표 ( Sun Pyo Kim ),김성중 ( Seong Jung Kim ),조수형 ( Soo Hyung Cho ),조남수 ( Nam Soo Cho ) 대한외상학회 2015 大韓外傷學會誌 Vol.28 No.1
Purpose: The purposes of this study are finding the elements for a fast determination of the need for a transfusion to a multiple trauma patient arriving at this clinic in the initial stage establishing objective bases for a doctor in an emergency department to determine the need for a transfusion immediately after a patient has arrived at the emergency department, and providing treatment by considering various factors based on the nine criteria suggested in the emergency room transfusion score (ETS). Methods: This study was conducted on 375 multiple-trauma patients who visited the Chosun University Hospital Emergency Medical Center and activated the Emergency Trauma Team from January 2010 to December 2013. The patients were divided into the transfused group and the non-transfused group by retrospectively analyzing their medical records. Subsequently, the medical records were examined using the nine items suggested by the ETS and the results were analyzed. Results: Three hundred seventy-five patients with multiple traumas visited the Chosun University Hospital Emergency Medical Center and activated the Emergency Trauma Team. Among them, 258 died and 117 recovered and left the hospital. The deceased patients consisted of 182 males and 76 females with an average age 45. Of the 375, 165 were transferred from other hospitals, and 245 were blunt trauma patients. One hundred sixty-nine patients were injured in traffic accidents, and 119 of those 169 who had systolic blood pressure less than 90 mm Hg died. Two hundred twenty-six (60.3%) out of the 375 patients with multiple traumas receivedan emergency blood transfusion and their average age was 48. The 375 patients consisted of 156 males, 151 who had been transferred from other hospitals, 218 who presented with blunt trauma, 134 who had been injured in traffic accidents, 156 who had a systolic blood pressure less than 90 mm Hg, 134 who scored higher than 9 points on the GCS, and 162 who had a stable pelvic fracture of these 143 died. Conclusion: During this study, 226 (60.3%) out of the patients with multiple traumas received an emergency blood transfusion. After analyzing the results related to emergency blood transfusion by using ETS, we found that an emergency blood transfusion had to be prepared quickly when patients were transferred from other hospitals when the systolic blood pressure was less than 90 mmHg. when abnormalities had been detected by ultrasonography and when the patient presented with a stable pelvic fracture. [ J Trauma Inj 2015; 28: 1-8 ]
단보 : Chinese Hamster Lung Cell의 소핵시험을 이용한 식물추출물 유기농업자재의 유전독성평가
조현조 ( Hyeon Jo Cho ),박경훈 ( Kyung Hun Park ),정미혜 ( Mi Hye Jeong ),박수진 ( Soo Jin Park ),오진아 ( Jin Ah Oh ),김원일 ( Won Il Kim ),조남준 ( Nam Jun Cho ),류재기 ( Jae Gee Ryu ),백민경 ( Min Kyoung Paik ) 한국환경농학회 2014 한국환경농학회지 Vol.33 No.2
님추출물과 고삼추출물은 식물추출물 유기농업자재로 우리나라에 등록되어 친환경농산물 재배에 널리 사용되고 있다. 본 연구에서는 님추출물 2종과 고삼추출물 2종에 대한 안전성을 확인하고자 Chinese hamster lung cells을 이용한 in vitro 소핵시험(vitMN)을 통해 유전독성을 평가하였다. 시험은 cytochalasin B 적용군과 비적용군으로 구분하여 시험하였으며, 양성대조물질로 mitomycin C와 colchicine을 사용하였다. 시험 결과, 님추출물 시료 2종과 고삼추출물 시료 2종은 처리 농도에 따라 소핵발생 비율이 증가하였으나 모든 시료 처리군에서 전체 발생률이 2.2% 미만으로, 음성대조군대비 2배 미만의 소핵이 관찰되었다. 따라서 님추출물 및 고삼추출물 시료는 본 시험의 vitMN 결과 최종적으로 음성으로 확인되었다. 또한 본 연구와 동일한 시료를 이용한 선행연구에서 복귀돌연변이 시험에서 음성을 보인 결과를 근거로 battery system에 의거해 종합적으로 평가하였을 때 님추출물과 고삼추출물 시료는 유전독성을 일으키지 않는 것으로 최종 판정하였다. BACKGROUND: Azadirachta Indica extract(AIE) and Sophorae radix extract(SRE) are widely used as environment-friendly organic materials of plant origin in South Korea. METHODS AND RESULTS: In this study, the in vitro micronucleus(vitMN) tests of two samples of AIE and SRE were conducted to evaluate their genotoxicity using the Chinese hamster lung(CHL) cell. This study was composed of two parts; cytochalasin B(cyto B) test and non-cyto B test. Mitomycin C and colchicine were used as positive controls. As a result, the incidence of micronucleus(MN) in all AIE and SRE treated groups increased in dose- dependent manner, but were less than 2.2% in 1,000 binucleated cells. In addition, there were no significant increases of MN incidence in all AIE and SRE treated groups, compared with the negative control group. CONCLUSION: Therefore, we suggest that AIE samples and SRE samples used in this study may have no genotoxicity in the in vitro micronucleus test using the CHL cells. In our previous study, we reported that AIE and SRE did not cause genotoxicity in Ames test. According to the genotoxicity battery system, we concluded that AIE and SRE used in this study have no genotoxic effects to humans.
광양만 유역의 수질 및 표층퇴적물에서의 PFOS 및 PFCs의 오염에 관한 연구
조현서(Hyeon Seo Cho),강조해(Jo Hae Kang),이대인(Dae In Lee),조천래(Chon Rae Cho),최민호(Min ho Choi) 한국해양환경·에너지학회 2005 한국해양환경공학회 학술대회논문집 Vol.2005 No.11
Per Fluorinated Compounds(PFCs) are fully fluorinated organic molecules produced synthetically in an electrochemical fluorination process PFOS, PFOA, PFHS, PFOSA are including among PFCs these compounds have high molecular weight and created are environmentally stable these compounds used in a variety of applications, such as in lubricants, paints, cosmetics, and fire-fighting foams. Produced and used widely over the last half-century, PFCs are being detected in wildlife and humans around the globe. Kwangyang Bay is a semi-closed coastal sea on the south coast of Korea. The total population within the bay watershed is approximately 240,000 people. Several rivers and ditches, including the Seomjin River, one of Korea's five biggest river systems, enter the bay, and seawater is exchanged with the South Sea at the southern part of the bay. The water depth is less than 5m in the western part of the bay, and is more than 20m near Myodo and in the eastern part of the bay. The area is characterised by a semidiurnal tide. Land-based pollution sources(river water, sediment) were investigated in January 2005 and seawater and sediment samples were collected in November 2004 and January 2005. Ranges of concentrations of PFOS, PFOA, PFHS and PFOSA in stream waters were ND-1411.5ng/L, ND-376.0ng/L, ND-488.0ng/L and ND-3.6ng/L, respectively. Stream sediments were ND-5.43ng/g dry-wt, ND-0.47ng/g dry-wt, ND-0.14ng/g dry-wt and ND-0.47ng/g dry-wt, respectively. Ranges of concentrations of PFOA in sea water at November 2004 were ND-5.0ng/L.. PFOS and PFOA in sea water at January 2005 were ND-14.3ng/L and ND-4.9ng/L, respectively.