http://chineseinput.net/에서 pinyin(병음)방식으로 중국어를 변환할 수 있습니다.
변환된 중국어를 복사하여 사용하시면 됩니다.
황보영,김용배,김화성,이성수,안규동,이병국 순천향대학교 교수학습개발센터 2004 Journal of Soonchunhyang Medical Science Vol.10 No.3
Objectives : This study intended to obtain the interrelationship of lead exposure indices and anemia related factors for the better health management of lead exposed workers. Methods : 502 male workers in storage battery industries as lead exposed group and 106 male office workers as contorl group were selected for this study. The examined variables wer age, work duration, smoking and alcohol crinking habit, blood zinc protoporphyin concentraion (ZPP), blood lead concentration (PbB), urinary δ-aminoevulinic acid (ALAU), hemoglobin (Hb), hematocrit (Hct), serum calcium (S-Ca), serum iron (S-Fe), total iron binding capacity (TIBC), and percentage trasferrin saturation (PTS). Results : The means of ZPP, PbB ALAU in lead exposed proup were 58.4±35.7 ㎍/㎗, 27.6±10.9 ㎍/㎗, and 1.61±2.00 mg/ℓ, respectively. These three values in lead exposed group were significantly higher than control group (P<.05). The means of Hb, Hct, S-Ca, S-Fe, TIBC, PTS in lead exposed group were 15.3±1.1 g/㎗, 47.2±4.5 %, 9.4±0.4 ㎍/㎗, 124.0±67.5 ㎍/㎗, 317.1±68.5 ㎍/㎗, and 38.7±15.2 %, respectively. Hb, Hct, S-Ca, S-Fe, and TIBC in lead exposed group were significantly lower than contrl group (P<.05). PTS was no significant difference in lead exposed group and control group (P> .05). Hct, S-Ca, S-Fe, PTS were significant positive correlation with Hb and ZPP, corrected PbB, AlAU were significant negaitive correlation with Hb in lead exposed group (P< .05). On multiple regression using ZPP as a dependent variable and PbB, S-Ca and S-Fe as independent variables after adjustment for possible confounder such as age, smoking and drinking habit, Pbb, S-Ca, S-Fe and age contributed to ZPP. Conclusions : As the result of this study, it was suggested that inclusion of S-Ca, S-Fe, PTS measurement as a anemia screening test for lead workers was highly recommended for the effective prevention and early diagnosis of anemia.
연취급 근로자들의 사회 심리적 스트레스와 연노출 지표들간의 관련성
김용배,안현철,황보영,리갑수,황규윤,이성수,안규동,이병국 大韓産業醫學會 2000 대한직업환경의학회지 Vol.12 No.1
목 적 : 연취급 근로자를 대상으로 사회 심리적 스트레스 수준을 알아보고 이를 기초자료로 활용하며 사회 심리적 스트레스와 연노출 지표들간의 관련성을 알아보고자 시도하였다. 방 법 ' 1차 연제련업종의 근로자 234명을 대상으로 일반적 특성, 사회 심리적 스트레스, 직업적 특성과 사회적 지지를 문진과 설문지를 통해 확인했으며 연노출 수준을 알기 위해 혈중 ZPP 농도, 혈중연농도, 요중 δ-ALA 배설량, 혈색소, 혈구용적치등을 측정했다. 결 과 : 단일변량 분석결과 혈중 연농도 수준과 직업적 특성에 따른 사회 심리적 스트레스는 유의한 차이가 있었으며 혈중 연농도가 증가함에 따라 스트레스 수준도 증가되는 경향을 나타냈다. 사회 심리적 스트레스와 연노출 지표 및 다른 변수들간의 관련성을 파악하기 위하여 상관분석을 실시한 결과 혈중 연농도만이 사회 심리적 스트레스와 양의 상관관계를 나타냈으며 유의했다. 결 론 : 고농도 연노출의 가능성이 있는 직종인 경우 기존의 연관련 자각증상에 대한 설문조사와 함께 사회 심리적 스트레스 측정도 병행하여 실시하는 것이 연에 의한 건강장해를 조기에 발견하고 예방하는데 필요하다. Objectives : This study was carried out to assess psychosocial distress of lead workers and to examine the relationship between lead exposure indices and psychosocial distress. Methods The study design was cross-sectional and research subjects were 234 lead workers in primary smelting industry. General characteristics, job characteristics and social support were obtained by self-administered questionnaire and history taking. Psychosocial distress was measured using PWI(Psychosocial Well-being Index), a 45-item self-administered instrument. Blood lead(PbB), zinc protoporphyrin(ZPP), δ-aminolevulinic acid in urine (ALAU) were selected as indicators of lead exposure. Results : There was significant difference in PWI according to lead exposure level and job characteristics. The results of correlation analysis showed that PWI was significantly correlated with PbB (r=0.203, p=0.002). Conclusions : Our results supported the association between lead exposure and psy-chosocial distress. The inclusion of psychosoclal distress measurement as a special health examination for lead workers was highly recommended for the effective health manage-ment.
Low-Temperature Synthesis of LiEuMo2O8 Red Phosphor for a White-Light-Emitting Diode
( Kyu Seog Hwang ),( Bo An Kang ),( Seung Hwang Bo ),( Yu Sang Kim ),( Jin Tae Kim ) 대한금속재료학회 ( 구 대한금속학회 ) 2010 ELECTRONIC MATERIALS LETTERS Vol.6 No.1
The EU3+-activated double molybdate red phosphor, LiEuMo2O8 was prepared by a sol-gel process using inorganic salts as starting materials. A precursor prefired at 500℃ for 240 min was subsequently annealed at 600℃ for 240 min in Ar. The crystal structure, surface morphology and luminescent properties were analyzed by an X-ray diffractometer, a field emission scanning electron microscope and a fluorescent spectrophotometer. The obtained LiEuMo2O8 shows a strong excitation band near 395 and 466 nm and intensely red-emission lines at 616 nm corresponding to the 5D0 → 7F2 transitions on EU3+ at 395 nm of light excitation.
Hwang, Bo-Kyu,Lee, Jihoon,Shin, Hyeon-Ok The Korean Society of Fisheries and Aquatic Scienc 2020 Fisheries and Aquatic Sciences Vol.23 No.4
We performed field measurements of the behavioral changes in cultured chub mackerel (Scomber japonicus) caused by tide-induced changes in the shapes of their small-sized tetragonal fish cages. The field measurements were conducted in two separate periods: neap tide, a period in which the shape of the fish cages was stable; and spring tide, a period in which the fish cages are significantly deformed, which was expected to have significant influences on fish behavior. In the spring tide, the cages were deformed greatly by the moving water, with different water velocities affecting the cages to different degrees; the volume loss was estimated at 4.9% and 7.3% for v = 0.114 m/s and v = 0.221 m/s, respectively. The fish exhibited significantly different behaviors between the neap tide and spring tide. During the neap tide, the fish remained in the lower part of the cage, but during the spring tide they made frequent upward and downward movements, and their horizontal distribution changed significantly due to the changes in the shape of the cage. The cage deformation during the spring tide greatly influenced the swimming behavior of fish.