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미용업 종사자들의 피부, 호흡기 및 근골격계 자각증상에 관한 유병률
이종태,박봉진,엄상화,김성준,강동묵,손혜숙,정귀원,강민숙,박성희 大韓産業醫學會 1999 대한직업환경의학회지 Vol.11 No.3
Objectives: Present study was conducted to evaluate work-related symptom prevalence among hairdressers. Methods: Exposed group comprised 184 employee employed 73 hair salons in 6 district of Pusan city, and non-exposed group comprised 119 people living recent apartments. A trained interviewer interviewed them with organised questionnaire which included dermatologic, respiratory and musculo-skeletal symptoms. Results : Prevalence of hand eczema was 28.3% in exposed group, and 5.8% in non-exposed group. Adjusted odds ratio for age and atopy history was 4.30(2.34-7.93). Prevalence of respiratory symptom (coughing) in exposed group was 22.1%, and 9.4% for non-exposed group. Adjusted odds ratio for coughing which was adjusted for age, smoking and atopy history was 2.76(1.32∼5.78). Prevalences of musculo-skeletal symptoms among exposed group were neck(59.9%), shoulder(76.6%), upper back(41.2%), lower back(72.2%), arm and elbow(31.3%), wrist(44.2%), finger(35.0%), leg(71.1%). Adjusted Odds Ratios for musculo-skeletal symptoms which was adjusted for age were neck 2.13(1.29∼3.51), shoulder 2.52(1.50∼4.24), upper back 1.71(1.01∼2.88), lower back1.78(1.06∼2.99), arm and elbow 3.10(1.62∼5.94), wrist 2.09(1.23∼3.57), finger 4.83(2.41∼9.68), leg 3.46(2.07∼5.79). Conclusions : These results show that employees in hair salon are likely to have high risk for work-related dermatologic, respiratory and musculo-skeletal symptoms and diseases. Hence, prevention methods from those work-related diseases are required to be developed. Also, the scope of occupational and environmental medicine should be expanded to service area including hairdressers.
Shon,Yun Hee,Cho,Kyoung Hee,Kim,Cheorl Ho,Lim,Jong Kook,Nam,Kyung Soo 한국생명과학회 2000 한국생명과학회 학술발표회 Vol.27 No.-
Induction of phase II enzymes such as quinone reductase (QR) or glutathione S-transferase (GST) is considered a major mechanism of protection against initiation of carcingenesis. The induction of detoxification enzymes and glutathione were studied with Lonicerae flos aqua-acupuncture solution (LFAS), Angelicae gigantis Radix aqua-acupuncture solution (AGRAS), and Gamdutang aqua-acupunture solution (GAS) in murine hepatoma cells grown in microtiter plate wells. LFAS, AGRAS and GAS were potent inducers of QR activity. LFAS was induced about 2.6-fold at concentration of 3×. AGRAS and GAS were also induced about 2.6-, 1.8-fold at concentration of 5×, respectively. In addition, GST activity was increased with LFAS, AGRAS, and GAS. GSH levels were increased about 2-fold with LEAS at concentration of 5×, 1.3-fold with AGRAS at concentration of 3×, and 1.2-fold with GAS at concentration of 5×, These results suggested that LFAS, AGRAS, and GAS may act as blocking agents against carcinogenesis by induction of phase II marker enzymes.
Development of On-line type Dynamic Voltage Compensation System Using Supercapacitor
Jong Hee Han,Il Dong Seo,Jin Geun Shon,Hee Jong Jeon 전력전자학회 2007 ICPE(ISPE)논문집 Vol.- No.-
In this paper, a study has been performed for optimal design and development of dynamic voltage compensation system using supercapacitor to solve voltage sag which are considered the dominant disturbances affecting power quality. Supercapacitor is employed to compensate dynamically for the voltage sag of system with sensitive load. With the prolific use of semiconductor devices in electrical equipment, modern-day loads are becoming increasingly sensitive to the sags and the disturbances prove to be costly to industries. As a technology -driven custom power installation, the Dynamic Voltage Compensation System is recognized to be most effective equipment that can be used to counter the voltage sag problem. Hence, this paper proposes the high-performance optimal design of Dynamic Voltage compensation system which can efficiently compensate the instantaneous voltage sag and instantaneous interruption of the utility voltage source. This DVR system consists of a dynamic voltage converter in series with the supply voltage and high-efficiency controller of energy storage device using Supercapacitor. Recently, in energy storage systems, the Supercapacitor is paid attention as a new environmentally friendly energy storage element. This capacitor stores higher energy density than the conventional electrolytic capacitor. Also, this capacitor has a lot of advantages such as maintenance-free, longer life cycle and faster charge-discharge time than the conventional battery system. However, the Supercapacitor for Dynamic Voltage Compensation System must have each charge-discharge controller to control, a series-parallel switching circuit to use energy effectively with application of several compensation techniques for optimal operating. Therefore, in this paper, optimal development of On-line type Dynamic Voltage Compensation Systems is proposed.
한종희(Jong-Hee Han),전희종(Hee-Jong Jeon),임병국(Byung-Kuk Lim),손진근(Jin-Geun Shon),박종찬(Jong-Chan Park) 전력전자학회 2006 전력전자학술대회 논문집 Vol.- No.-
In this paper, we propose EDLC's high effective operating techniques. EDLC is energy storage device that has advantages of electrolytic capacitor and accumulation capacitor and that supplements defect such as energy storing accumulation capacity, life time and safety. But, EDLC needs for more complex control scheme because is influenced directly in efficiency and life time by charge and discharge control method. In this paper, DVR system's performance is proposed by EDLC's high effective operating technique.
손윤희,임종국,최혜경,남경수,배만종 경산대학교 생명자원개발연구소 1999 생명자원과 산업 Vol.3 No.-
한방에서 염증, 종양 억제 등에 사용되는 금은화로 약침액을 조제하여 쥐와 사람의 암세포 성장억제효과를 살펴 보았을 때 금은화 약침액 10×, 5×농도는 mouse EATC에 대해 90% 및 86% 세포 성장 억제율이 있었으며, 열수추출액 10×, 5× 농도는 89% 및 87% 세포 성장억제효과가 있었다. 같은 농도의 약침액을 Hepalclc7에 처리했을 때는 89.5%, 69.7%의 억제효과가 있었고 열수추출액은 85.7%, 67.3%의 hepalclc7 세포 성장억제율을 보였다. 사람의 암세포주 A549, HeLa 세포에 대한 금은화 약침액 및 열수추출액의 세포독성 실험에서도 A549 세포에 약침액 10×, 5×를 처리했을 때 82.0%, 46.1% 세포 성장억제효과가 나타났으며 금은화 역수추출액은 75%, 50%의 세포 성장 억제율이 나타났다. HeLa 세포에서는 약침액이 열수추출액보다 세포 성장 억제효과가 더 높았다. 금은화 약침액을 처리한 세포(EATC,Hepalclc7과 human A549, HeLa)의 현미경 관찰에서는 세포수의 감소와 형태의 변화를 관찰할 수 있었다. Lonicerae flos Aqua-acupuncture Solution(LFAS) and Lonicerae flos Water-extracted Solution(LFWS) were prepared and tested for their potential antitumor activities. It was shown to possess considerable toxicity toward various tumor cell lines. Concentration of LFAS at 10× and 5× resulted in more than 50% inhibition of growth in Ehrich ascites tumor cells(EATC), Hepalclc7, and HeLa cells after 72 hours. Toxicity of LFWS to A549 revealed that more than 50% inhibition of growth at LFAS conentration of 10× after 72 hours. Concentration of LFWS at 10× and 5× showed more than 50% inhibition of growth with EATC, Hepalclc7, HeLa and A549. In morphological study, the number of cells were decreased, and the shape of cells was round form in EATC, Hepalclc7, HeLa, and A549.