대학생들의 화장습관에 따른 소변 중 벤조페논 농도 비교

오승은,호성욱,김현석,이세훈,박나연,고영림,Oh, Seungeun,Ho, Sungwook,Kim, Hyunsuk,Lee, Sehoon,Park, Nayeon,Kho, Younglim 한국환경보건학회 2013 한국환경보건학회지 Vol.39 No.6

Objectives: Ultraviolet (UV) radiation may cause skin cancer, photo-ageing, erythema, and sunburn. Benzophenone (BP) is commonly used to protect skin from UV radiation. In Korea, sunscreen, sunblock, socalled 'blemish balm' (BB) and 'color correcting' (CC) creams, and foundation may contain from 0.5 to 5% benzophenone in order to protect skin from UV radiation. The purpose of this study is to understand the levels of benzophenone derivatives in urine among a group of university students and identify the contribution of cosmetics use. Methods: Forty volunteers (20 women and 20 men) were asked about skin type, frequency of use of cosmetics, and recognition of related health effects, etc. in a survey. Subjects were divided into several subgroups and were compared for concentration of benzophenone-1 (BP-1) and benzophenone-3 (BP-3). Their urine was pretreated with enzyme hydrolysis and solid phase extraction. Determinations of BP-1 and BP-3 in the urine were made with LC-MS/MS. Results: Among the study subjects, 82.5% used basic cosmetics at least once per day, and 77.5% used sunscreens at least once per day. The concentrations of BP-1 and BP-3 of the males were 4.36 ng/mL and 9.16 ng/mL, respectively. Those of the females were 3.98 ng/mL and 5.07 ng/mL, respectively. The use of cosmetics was positively related to urinary benzophenone levels. Conclusions: BP-1 and BP-3 were widely detected among the university students. Cosmetic use was identified as a potential source. Implications of such exposure deserve further investigation.

2010년 채란업을 결산한다 - 계란유통구조 개선 없이는 채란업 발전 기대 어려워

오승은,Oh, Seung-Eun 대한양계협회 2010 월간 양계 Vol.42 No.12

칼코게나이드 유리 소재의 PGM 가공 렌즈를 사용한 저가의 적외선 광학계 설계와 제작

오승은,이선규,최중규,송국현,백종식,Oh, Seung Eun,Lee, Sun Kyu,Choi, Joong Kyu,Song, Kook Hyun,Baek, Jong Sik 한국광학회 2012 한국광학회지 Vol.23 No.4

본 논문에서는 적외선 광학장비의 가격 경쟁력을 확보하고자 상대적으로 저렴한 비용으로 제작이 가능한 PGM(Precision Glass Molding) 가공 렌즈로 구성된, 비냉각형 검출기용 적외선 광학계를 설계 및 제작하였다. PGM 가공이 가능하도록 광학계의 모든 렌즈에 칼코게나이드 유리(Chalcogenide Glass) 소재를 사용하였으며, 자체 비열화가 구현되도록 설계하였다. 또한 기존 가공법인 SPDT(Single Point Diamond Turning) 방법으로 제작된 렌즈로, 동일한 광학계를 구성하여 PGM 가공 렌즈의 성능 측정에 사용하였다. 제작된 두 광학계의 변조전달함수(MTF) 측정 결과와 실제 영상의 촬영 결과를 비교하여 분석한 결과, 가공 방법에 따른 렌즈의 성능 차이는 그리 크지 않음을 확인할 수 있었다. 따라서 향후 PGM 가공 렌즈의 사용이 증가하면, 적외선 광학장비의 가격 경쟁력이 향상될 것으로 기대된다. In this paper, for low cost infrared optical equipment, we design and fabricate an infrared optical system for an uncooled detector using PGM(Precision Glass Molding) lenses. The designed infrared optical system has a good athermalization, and the material of all of its lenses is a chalcogenide glass suitable for the PGM method. In addition, we also fabricate the same infrared optical system using SPDT(Single Point Diamond Turning) lenses in order to measure the optical performance of PGM lenses. We measure the MTF(Modulation Transfer Function) of the two infrared optical systems which use the PGM lenses and the SPDT lenses. And then we compare and analyze the images of them both. As a result, we find that they have only a very small difference in optical performance. If the use of PGM lenses increases, we expect to reduce the cost of infrared optical equipment.

가정간호 대상자 가족의 부담감과 가족기능과의 관계

오승은,김순례,Oh, Seung-Eun,Kim, Soon-Lae 한국가정간호학회 2007 가정간호학회지 Vol.14 No.2

Purpose: This thesis focuses on researching the burden of the Home Health Care that the Family Care-givers have. Method: This study had been conducted for the duration of 3 consecutive months from January 2006 to March 2006 and had investigated 120 person registered as the Home Health Care Clients to a University Hospital located in Incheon City. The thesis adopted the 'feeling of burden' measuring method jointly developed by Seo, Mi-Hye and Oh, Ga-Sil(1993), and FACES-III(Family Adaptability Cohesion Evaluation) developed by Olson(1985) etc. translated by Kim, Yun-Hee(1989) as the measuring method for Family Function. Result: The overall Health Status of the Home Health Care Clients was 2.18 point of average out of 3 point, where as 1.83 for Activities of Daily living and 1.98 for Vital sign, which are below the average. In the mean time, the Competence for Modified Barthel Index marked 30.88 point out of the full mark. The analyzed result of the burden that the family members have was 3.43 point of average out of 5 point which shows that the interviewee feel that they are considerable burden to their families. When it comes to 'the Burden to the family members' and 'the Function of the family' according to the characteristics of the patient, the result shows statistically significant differences, which are varied according to gender, the relationship between the care-givers and the patients. When it comes to the Family Cohesion, the difference was examined as 'statistically significant' according to the Academic background of the patients and the relationship between the patients and the interviewee.(p<0.05). The result also suggests that there exists 'Negative correlation' among the level of patients' health status, the Family Cohesion and the Family Burden. Conclusion: From the result of this study stated above, this thesis is strongly insisting that there is an urgent need for us to develop a health care mediation program, which could eventually reduce the burden of home health care that the patients' family have. At the same time, a follow-up research to prove the effect of the program is imminent.

반도체 폐수처리 공정의 외부탄소원을 아세트산으로 대체 적용하기 위한 GPS-X 모의 연구

오승은 ( Seung-eun Oh ),채현병 ( Hyun-byung Chae ),추태호 ( Tai-ho Choo ),채수권 ( Soo-kwon Chae ) 한국환경기술학회 2016 한국환경기술학회지 Vol.17 No.3

고농도 질소가 함유된 반도체 폐수처리 공정에서 탈질 외부탄소원으로써 메탄올이 과량으로 사용되고 있다. 따라서, 메탄올은 화재 및 폭발 등과 같은 안전문제가 발생될 확률이 높아서 안전한 외부탄소원으로써 아세트산을 사용하기 위해서 반도체 폐수처리 공정을 GPS-X로 적용성 및 최적 운전조건을 모의하였다. 메탄올과 아세트산의 회분식 탈질실험으로 탈질속도를 비교한 결과, 탈질반응 1시간 후 탈질속도는 아세트산을 400 mg/L 주입한 경우 0.0027 mgNO₃-N/hr/MLSS로 메탄올 400 mg/L를 주입한 경우보다 약 2배 빨랐다. 대체 외부탄소원으로써 아세트산을 사용한 GPS-X로 후탈질조의 C/N비, 체류시간, 내부반송률 및 슬러지반송률 변화에 따라 최적운전을 모의하였다. 모의한 결과, 후탈질조의 C/N비, 체류시간, 내부반송률, 슬러지반송률은 각각 4, 5hr, 300%, 50%이었다. 이 운전조건으로 고농도 질소를 함유한 반도체 폐수를 운전 모의한 결과, 후탈질조의 NO₃-N 제거율과 탈질율은 각각 84.3%, 262 mgN/L/d였으며, 최종 방류수의 TN은 12.1 mg/L로 방류수질 기준을 만족하였다. Methanol is used in poisonous doses as external carbon source on the semiconductor wastewater treatment process that includes high concentration of nitrogen. We simulated application and optimum operation conditions on semiconductor wastewater treatment process to use acetic acid as safe external carbon source, using GPS-X because methanol is big possible that fire and explosion are caused. Batch denitrification experiment result dosing each methanol and acetic acid 400 mg/L was that the denitrification velocity of acetic acid, 0.0027 mgNO₃-N/hr/MLSS, was nearly twice faster than the denitrification velocity of methanol. We simulated optimum operation conditions using GPS-X depending on C/N ratio and HRT (hr) of the post-denitrification tank, internal recycle rate (%), sludge recycle rate (%). As a result of simulation, optimum operation conditions were that C/N ratio and HRT of the post-denitrification tank, internal recycle rate, and sludge recycle rate were each 4, 5hr, 300%, and 50%. When the semiconductor wastewater treatment process was operated with optimum operation conditions, NO₃-N removal efficiency and denitrification rate on the post-denitrification tank were each 84.3% and 262 mgN/L/d. Also final effluent TN concentration satisfied water criteria as 12.1 mg/L.

마흐두드의 다문화주의

오승은(Seung Eun Oh) 이주사학회 2013 Homo Migrans Vol.7 No.-

크림사태와 동유럽을 떠도는 ‘베르사이유 체제의 유령’

오승은(Seung Eun Oh) 이주사학회 2014 Homo Migrans Vol.10 No.-

전쟁과 그 휴유증

오승은(Seung-Eun Oh) 이주사학회 2010 Homo Migrans Vol.2 No.-

옥수수 유식물 조직에서 분리한 막 단백질과 Phosphatidylcholine 의 재조합

오승은 (Seung Eun Oh) 한국식물학회 1990 Journal of Plant Biology Vol.33 No.4

N/A

Cucurbita pepo 에서 분리한 Light Membrane Vesicle 의 ATPase 와 Phosphatase 의 정제 및 특성

오승은 (Seung Eun Oh) 한국식물학회 1990 Journal of Plant Biology Vol.33 No.4

Light membrane vesicles were isolated from the zucchini hypocotyl by floatation on ficoll density gradients and the proteins were solubilized with Triton X100. Three ATP-hydrolyzing enzymes were partially purified by ion-exchange and gel filtration chromatography and isoelectric focusing. There are plasma membrane-type ATPase whose activity was inhibited by vanadate but not by nitrate, tonoplast-type ATPase which was sensitive to nitrate but insensitive to vanadate and one having a phosphatase activity with a pI value different from that of an acid phosphatase. A fraction was obtained after DEAE-ion-exchange chromatography crossreacting with polyclonal antibodies against Ca^2+-ATPase from human erythrocytes.