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윤복연,문덕환,박명희,황용식,함성애,손병철,김대환,이창희,김휘동,이채언 인제대학교 백병원 2002 仁濟醫學 Vol.23 No.5
Objective : This study was conducted to prepare the fundamental data on heavy metal concentration in hair permanents agents and to prevent the health impairment due to heavy metal. Methods and Material : The author determined of 5 heavy metals(Pb, Cr, Mn, Ni, and Cu) concentration hair permanent agents in the market with flameless atomic absorption spectrophotometer. Results : The results were as follows: 1. The geometic mean concentrations of total subjects were 0.04㎍/g for Pb, 0.09㎍/g for Cr, 0.06㎍/g for Mn, 0.03㎍/g for Ni, and 0.04㎍/g for Cu. 2. The most highest mean concentrations of heavy metals in hair permanent agents by using type were Cr for wave agent and straight cream agent, Cu for setting iron agent, Cr and Cu for coating perm agent. 3. Metal most hlghest mean concentrations of heavy in hair permanent agents by type of color was green for Cu. 4. The mean concentration of Cu among 5 heavy metals in hair permanent agents by marker was most highest. 5. There was most statistically significant difference on mean concentration in hair permanent agents between domestic and foreign products. 6. The exposure amount of heavy metal concentration by one time using the permanent agent were 4.O㎍ for Pb, 9.O㎍ for Cr, 6.0㎍ for Mn, 3.O㎍ for Ni and 4.0㎍ for Cu. Conclusion : As above results author suggest to prepare the preventive program of health impairment due to heavy metal by long term chronic exposure to who were using the hair permanent agents hair designer and customers.
김선문,허원석,채경훈,강윤세,정재훈,김연수,박기오,문희석,이엄석,김석현,성재규,이병석,이헌영,신경숙,조준식,송인상,강대영 충남대학교 의학연구소 2003 충남의대잡지 Vol.30 No.2
Malignant peritoneal mesothelioma is a rare neoplasm that arises from the mesothelium of a serosal cavity and is a rapidly fatal disease with a median survival of 4 to 12 months for untreated cases. Recently, we experienced a case with malignant peritoneal mesothelioma who was suspected hepatocelluar carcioma by abdominal CT scan and was confirmed by biopsy including immunohistochemical stain(calretinin) after surgery. We performed tumor excisions and wedge resection of the liver(segment Ⅷ)and inserted Tencoff catheter in abdominal cavity at 25th day of post-operation. We treated with intraperitoneal paclitaxel(25mg/m^(2)/day for 5 days) six courses monthly. She was well tolerable and is still living without any evidence of recurrence for 14th month of post-operation.
정대연,강문호 선문대학교 2001 공학계열 논총 Vol.4 No.-
This paper addresses a MR(Magneto-Resistive) sensor based vehicle speed detector which has been developed as an alternative to the conventional loop detector most available on the road. Consisting of two MR sensors and voltage amplifiers, microprocessor, RF module for wireless data transferring, the proposed detector can offer essential traffic data such as vehicle volume and speed. At first, basic speed detecting performance of the detector was verified with a simple car moving simulator in laboratory, and then real world field test was performed to show the practical usefulness as an alternative to the loop detector
Ethylenediaminetetraacetic acid(EDTA)항응고제에 의한 Mean Corpuscular Volume(MCV)변화
홍승민,박영진,최하영,임진,정옥연,이호준,이호영,장숙진,문대수 朝鮮大學校 附設 醫學硏究所 1996 The Medical Journal of Chosun University Vol.21 No.2
It is essential that we put the anticoagulant into the blood specimen of the CBC test. However, the value of some parameters in the CBC test can be changed whenever using some anticoagulants. EDTA anticoagulant is mostly used these days. There are 3 kinds of EDTA, that is K_(2-), K_(3-), and Na_(2-) EDTA. The author studies how many effects each the EDTA gets into the true value of blood specimen for MCV of RBCs. Especially we compared the MCV effect of different concentrations of 3 EDTA anticoagulants on the bias with time and instrument. Some results are gotten. In our results, K_(3-)EDTA anticoagulant shows more satisfactory MCV value than K_(2) or Na_(2-)EDTA. On using concentration of EDTA, 1.5㎎ EDTA/㎖ of blood show more satisfactory MCV value than 7.5㎎ EDTA/㎖ of blood. However, the choice of anticoagulant may be dependant on the different instruments.
Effects of High-Dose Proton Irradiation on ZnO Thin-Film Transistors
Yeon-Keon Moon,Dae-Yong Moon,Sih Lee,박종완 한국물리학회 2009 THE JOURNAL OF THE KOREAN PHYSICAL SOCIETY Vol.54 No.3
High-dose proton beam irradiation is an effective post-treatment for modifying the structural, optical and electrical properties through ion interactions. The object of this study was to improve the performance of ZnO-TFTs by controlling of electrical properties in the ZnO channel layer through high-dose proton irradiation. We exposed the ZnO-TFTs to 6.1-MeV proton irradiation to control the electrical properties of the ZnO channel layer. The carrier concentration of the ZnO thin film decreased after high-dose proton irradiation. We examined the structural and the electrical properties and the variations in the native defects of the ZnO thin films. The field effect mobility of ZnO-TFTs increased from 1.65 cm2/V·s to 2.31 cm2/V·s and the turn-on voltage shifted to positive voltages from -18 V to -2 V after the high-dose proton irradiation. High-dose proton beam irradiation is an effective post-treatment for modifying the structural, optical and electrical properties through ion interactions. The object of this study was to improve the performance of ZnO-TFTs by controlling of electrical properties in the ZnO channel layer through high-dose proton irradiation. We exposed the ZnO-TFTs to 6.1-MeV proton irradiation to control the electrical properties of the ZnO channel layer. The carrier concentration of the ZnO thin film decreased after high-dose proton irradiation. We examined the structural and the electrical properties and the variations in the native defects of the ZnO thin films. The field effect mobility of ZnO-TFTs increased from 1.65 cm2/V·s to 2.31 cm2/V·s and the turn-on voltage shifted to positive voltages from -18 V to -2 V after the high-dose proton irradiation.
Serum Thyroid Hormone Levels in Wild and Captive Sea Turtles
Moon, Dae-Yeon,Mackenzie, Duncan-S.,Owens, David-W. The Korean Society for Integrative Biology 1998 Korean journal of biological sciences Vol.2 No.2
Blood samples collected from green (chelonia mydas), loggerhead (caretta caretta), and Kemp's ridley (Lepidochelys kempii) sea turtles were analyzed by radioimmunoassay to detect seasonal variations in thyroid hormones and compare levels in wild and captive individuals. Sexual dimorphism in the annual cycle of thyroxine was observed in adult Kemp's ridley. No differences were observed between immature male and female green and loggerhead sea turtles. The level of triiodothyronine was consistently low relative to thyroxine in all species investigated, and captive sea turtles exhibit higher plasms thyroid levels than do wild ones.