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Effects of Jeju Water Containing Vanadium on Antioxidant Enzymes in vitro
Areum Daseul Kim,Kyoung Ah Kang,Rui Zhang,Mei Jing Piao,김석만,지영흔,Nam Ho Lee,Ho Jin You,고경수,현진원 대한암예방학회 2010 Journal of cancer prevention Vol.15 No.4
scavenging of reactive oxygen species (ROS). In the present study, the aim was to examine the antioxidant effect of Jeju water containing vanadium (S3, 26.0±2.0 μg/l) in terms of antioxidant enzymes in vitro. Human Chang liver cells were incubated for 10 passages in media prepared with either deionized distilled water (DDW) or S3. S3 increased activities of superoxide dismutase (SOD), catalase (CAT), glutathione peroxidase (GPx), and heme oxygenase-1 (HO-1) compared to DDW. S3 also increased the level of reduced glutathione (GSH) shown by colorimetric assay and by high-resolution magic angle spinning nuclear magnetic resonance (HR-MAS NMR) spectroscopy. These results suggest that vanadium-containing Jeju water (S3) produces antioxidant effect in vitro by enhancing antioxidant enzyme activities. (Cancer Prev Res 15, 262-267, 2010)
마이크로프로세서를 이용한 UTILITY CAR용 CONTROLLER 개발에 관한 연구
안호균,남징락,김태엽 國立 昌原大學校 産業技術硏究所 1999 産技硏論文集 Vol.13 No.-
This paper describes the development of Controller for the Utility Car using Microprocessor. The Utility Car is composed of Controller, separately excited DC motor, battery and potbox. It is easier for a digitalized controller using microprocessor to append new function than an analogized controller. For sensorless current control, the driver is used the feedback voltage of battery.
최대 오차 벡터를 이용한 최적 공간 벡터 변조 기법에 관한 연구
안호균,김태엽,진승오,남징락 國立 昌原大學校 産業技術硏究所 1998 産技硏論文集 Vol.12 No.-
This study proposes a optimized space vector modulation(SVM), which makes a good output current with low total harmonic distortion(THD) and introduces the concept of maximum error vector for new method. The performance of the new modulation technique using maximum error vector is shown by simulation and experiments.
폴록사머 및 프로필렌글리콜을 이용한 클로트리마졸 고형 좌제의 물리화학적 특성
현경희,오유경,김정애,공경환,김지현,양준호,배명수,김호동,이종달,장현욱,용철순,최한곤 한국약제학회 2005 Journal of Pharmaceutical Investigation Vol.35 No.2
To develop a clotrimazole-loaded solid suppository with poloxamer and propylene glycol, the melting points of various formulations composed of poloxamer 188 (P 188) and propylene glycol were investigated. The dissolution study of clotrimazole delivered by the suppository composed of P 188 and propylene glycol was performed. The mixtures composed of P 188 and propylene glycol were homogeneous. Propylene glycol affected the melting points of poloxamer mixtures. In particular, the mixture [P 188/propylene glycol (70/30%)] with the melting point of about 32°C was a solid form at room temperature and instantly melted at physiological temperature. Furthermore, propylene glycol affected greatly the dissolution rates of clotrimazole from the suppository. Dissolution mechanism analysis showed the dissolution of clotrimazole was proportional to the time. Our results indicated that the solid suppository with P 188 and propylene glycol would be a candidate of rectal dosage form for clotrimazole.
장세진,고상백,강동묵,김성아,강명근,이철갑,정진주,조정진,손미아,채창호,김정원,김정일,김형수,노상철,박재범,우종민,김수영,김정연,하미나,박정선,이경용,김형렬,공정옥,김인아,김정수,박준호,현숙정,손동국 大韓産業醫學會 2005 대한직업환경의학회지 Vol.17 No.4
Background and Purposes: Over the past three decades, numerous studies performed in Korea have reported that job stress is a determinant risk factor for chronic diseases and work disability. Every society has its own culture and occupational climate particular to their organizations, and hence experiences different occupational stress. An occupational stress measurement tool therefore needs to be developed to estimate it objectively. The purpose of this study is to develop and standardize the Korean Occupational Stress Scale (KOSS) which is considered to be unique and specific occupational stressors in Korean employees. Subjects and Methods: Data were obtained from the National Study for Development and Standardization of Occupational Stress (NSDSOS Project: 2002-2004). A total of 12,631 employees from a nationwide sample proportional to the Korean Standard Industrial Classification and the Korean Standard Occupational Classification were administered. The KOSS was developed for 2 years (2002-2004). In the first year, we collected 255 items from the most popular job stress measurement tools such as JCQ, ERI, NIOSH and OSI, and 44 items derived from the a qualitative study (depth interview). Forty-three items of KOSS, in the second year, were retained for use in the final version of the KOSS by using Delphi and factor analysis. Items were scored using conventional 1-2-3-4 Likert scores for the response categories. Results: We developed eight subscales by using factor analysis and validation process: physical environment (3 items), job demand (8 items), insufficient job control (5 items), interpersonal conflict (4 items), job insecurity (6 items), organizational system (7 items), lack of reward (6 items), and occupational climate (4 items). Together they explained 50.0% of total variance. Internal consistency alpha scores were ranged from 0.51 to 0.82. Twenty-four items of the short form of the KOSS (KOSS-SF) were also developed to estimate job stress in the work setting. Because the levels of the subscales of occupational stress were gender dependent, gender-specific standard norms for both the 43-item full version and the 24-item short form using a quartile for the subscales of KOSS were presented. Conclusion: The results of this study suggest that KOSS might be an appropriate measurement scale to estimate occupational stress of Korean employees. Further and more detailed study needs to be conducted to improve the validity of this scale.
Manufacturing of GaAs MMICs for Wireless Communications Applications
Ho, Wu-Jing,Liu, Joe,Chou, Hengchang,Wu, Chan Shin,Tsai, Tsung Chi,Chang, Wei Der,Chou, Frank,Wang, Yu-Chi The Institute of Electronics and Information Engin 2006 Journal of semiconductor technology and science Vol.6 No.3
Two major processing technologies of GaAs HBT and pHEMT have been released in production at Win Semiconductors corp. to address the strong demands of power amplifiers and switches for both handset and WLAN communications markets. Excellent performance with low processing cost and die shrinkage features is reported from the manufactured MMICs. With the stringent tighter manufacturing quality control WIN has successfully become one of the major pure open foundry house to serve the communication industries. The advancing of both technologies to include E/D-pHEMTs and BiHEMTs likes for multifunctional integration of PA, LNA, switch and logics is also highlighted.
Manufacturing of GaAs MMICs for Wireless Communications Applications
Wu-Jing Ho,Joe Liu,Hengchang Chou,Chan Shin Wu,Tsung Chi Tsai,Wei Der Chang,Frank Chou,Yu-Chi Wang 대한전자공학회 2006 Journal of semiconductor technology and science Vol.6 No.3
Two major processing technologies of GaAs HBT and pHEMT have been released in production at Win Semiconductors corp. to address the strong demands of power amplifiers and switches for both handset and WLAN communications markets. Excellent performance with low processing cost and die shrinkage features is reported from the manufactured MMICs. With the stringent tighter manufacturing quality control WIN has successfully become one of the major pure open foundry house to serve the communication industries. The advancing of both technologies to include E/D-pHEMTs and BiHEMTs likes for multifunctional integration of PA, LNA, switch and logics is also highlighted.
연구논문 : 생명과학 ; 폴록사머 및 프로필렌글리콜을 이용한 클로트리마졸 고형 좌제의 물리화학적 특성
현경희 ( Jing Ji Xuan ),오유경 ( Yu Kyoung Oh ),김정애 ( Jung Ae Kim ),공경환 ( Kyung Hwan Gong ),김지현 ( Ji Hyun Kim ),양준호 ( Joon Ho Yang ),배명수 ( Myung Soo Bae ),김호동 ( Ho Dong Kim ),이종달 ( Jong Dal Rhee ),장현욱 ( Hye 영남대학교 약품개발연구소 2005 영남대학교 약품개발연구소 연구업적집 Vol.15 No.-