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Toluene diisocyanate 폭로 근로자에서의 직업성 천식에 관한 연구
정익수,최재욱,차철환 고려대학교 의과대학 1993 고려대 의대 잡지 Vol.30 No.1
In order to measure toluene diisocyanate (TDI) concentration in air, a total of 41 air samples of spray painting workshop in 11 companies were analysed using a High Performance Liquid Chromatography (HPLC). And performed questionnaire survey about respiratory symptoms, physical examinations, TDI-specific Ig E antibody (Phadebas, RAST) test, pulmonary funtion test including forced vital capacity (FVC), forced expiratory volume in one second (FEV_(10)), vital capacity (VC) and peak expiratory flow rate (PEFR) on 32 spray painters (Group 1), 38 spray assistants (Group 2) and 22 nonexposed workers (Group 3) for comparison. The results were as follows ; 1. The average concentration of TDI in air of water-wash spray booth site was 0.0042±0.023 ppm, closed type spray booth site was 0.0019±0.0013 ppm, drying room site was 0.0044±0.0022 ppm, spray assisstant work site was 0.0013±0.0003 ppm by each. 2. Among the respiratory symptoms, frequency rate of 'dyspnea' and 'dyspnea on working' were significantly higher in group 2 and group 1, and FVC, PEFR decreased significantly in subjects having the symptom of 'dyspnea on working.' 3. The FEV_(10) and FVC decreased significantly in exposed group (group 1 and group 2), while group 1, 3 pair showed significant change in FEV_(10) and group 2, 3 pair showed significant change in FVC. 4. In the TDI-specific Ig E antibody (Phadebas, RAST) test, numbers of workers with positive reaction were 4 (15.0%) in group 1, 4 (11.8%) in group 2 and 0 (0.0%) in group 3. And among the subjects with positive reaction to TDI-specific Ig E antibody, 2 cases had 'dyspnea' and 'dyspnea on working' symptoms, I case showed pulmonary function abnormality and 2 cases showed positive response with PEFR test. 5. PEFR tests on 15 subjects who had remarkable symptoms or TDI-specific Ig E antibody at least for 2 weeks were performed. The number of cases of positive response compatible with occupational asthma was 6 (40%), and amomg these cases, 2 workers (33%) showed positive reaction of TDI-specific Ig E antibody.
Kim, Ik-Soo,Cha, So-Young,Lee, Sun-Young,Kim, Seong-Ryul,Hwang, Jae-Sam,Li, Jianhong,Han, Yeon-Soo,Jin, Byung-Rae Korean Society of Sericultural Science 2007 International Journal of Industrial Entomology Vol.14 No.2
The mole crickets, Gryllotalpa, are insect pest distributed in the world. In Korea, G. orientalis was reported to occur, but previous ecological studies suggested the presence of two ecological types. To test this hypothesis, we sequenced a portion of mitochondrial (mt) genome from 48 G. orientali individuals collected over five Korean localities: Busan, Suwon, Okchon, Wonju, and Gangneung. From the sequence analysis, only two haplotypes were obtained, but the sequence divergence between the two haplotypes was 11 %, suggesting the presence of two distinct genetic groups in Korea. Although the population of Busan, Okchon, Wonju, and Gangneung was identified as a single haplotype, but that of Suwon was occupied by both hapotypes. Considering sequence divergence of other insect species occurring in Korea, the divergence estimate found between the two haplotypes seems to be too large to be considered as identical species. This result may suggest that the two differentiated haplotypes found in this study may reflect the previously reported two ecological types found in Suwon, Korea. To further understand the genetic divergence of the two phylogenetic groups, analysis of more variable regions of G. orientalis genome is required.
Case Report : Cushing syndrome in pregnancy secondary to adrenal adenoma
( Ik Jin Chang ),( Hyun Hwa Cha ),( Jung Han Kim ),( Suk Joo Choi ),( Soo Young Oh ),( Cheong Rae Roh ) 대한산부인과학회 2013 Obstetrics & Gynecology Science Vol.56 No.6
We report a case of Cushing syndrome secondary to adrenal adenoma presenting with hypertension and oligohydramnios during pregnancy. The tumor was confirmed by magnetic resonance imaging at 28 week 3 day weeks of pregnancy and was removed surgically at 29 week 1 day weeks of gestation. After surgery, hypertension subsided and amniotic fluid volume returned to normal range. The gravid woman subsequently delivered a healthy infant at term.
Cha, Joeun,Ko, Eun-Song,Shin, Ik-Soo The Korean Electrochemical Society 2017 Journal of electrochemical science and technology Vol.8 No.2
Iridium(III) bis(2-phenylpyridinato-$N,C^{2^{\prime}}$)acetylacetonate ($(ppy)_2Ir(acac)$), a green dopant used in organic light-emitting devices (OLEDs), was subjected to electrochemical characterization to estimate its formal oxidation potential ($E^{o^{\prime}}$), HOMO energy level ($E_{HOMO}$), electron transfer rate constant ($k^{o^{\prime}}$), and diffusion coefficient ($D_o$). The employed combination of voltammetric methods, i.e., cyclic voltammetry (CV), chronocoulometry (CC), and the Nicholson method, provided meaningful insights into the electron transfer kinetics of $(ppy)_2Ir(acac)$, allowing the determination of $k^{o^{\prime}}$ and $D_o$. The quasi-reversible oxidation of $(ppy)_2Ir(acac)$ furnished information on $E^{o^{\prime}}$ and $E_{HOMO}$, allowing the latter parameter to be easily estimated by electrochemical methods without relying on expensive and complex ultraviolet photoemission spectroscopic (UPS) measurements.