http://chineseinput.net/에서 pinyin(병음)방식으로 중국어를 변환할 수 있습니다.
변환된 중국어를 복사하여 사용하시면 됩니다.
Jia Ryu,Key Hwan Lim,Dong-Ryeol Ryu,Hyang Woon Lee,Ji Young Yun,Seoung-Wook Kim,Ji-Hoon Kim,Kyunghee Jung-choi,Hyunjoo Kim 대한직업환경의학회 2016 대한직업환경의학회지 Vol.28 No.-
Background: Methyl alcohol poisoning has been mainly reported in community. Two cases of methyl alcohol poisoning occurred in a small-sized subcontracted factory which manufactured smartphone parts in Korea. Case presentation: One young female patient presented with dyspnea and visual disturbance. Another young male patient presented with visual disturbance and myalgia. They treated with sodium bicarbonate infusion and hemodialysis for metabolic acidosis. In addition, he received ethyl alcohol per oral treatment. Her and his urinary methyl alcohol concentration was detected as 7.632 mg/L, 46.8 mg/L, respectively, although they were treated hemodialysis. Results of the working environment measurement showed that the concentration of methyl alcohol (1030.1–2220.5 ppm) in the air exceeded the time weighted average (200 ppm). They were diagnosed with optic neuropathy due to methyl alcohol poisoning and still have visual impairment. Conclusions: Workers who hired as dispatched employees in a small-sized subcontracted factory were exposed to high concentrations of methyl alcohol. The workplace had poor ventilation system. In addition, workers did not wear proper personal protect equipment. Working environment measurement and annual chekups for workers were not performed. They were in a blind spot to occupational safety and health. More attention is needed to protect vulnerable workers’ health.
Ryu, Jia,Lim, Key Hwan,Ryu, Dong-Ryeol,Lee, Hyang Woon,Yun, Ji Young,Kim, Seoung-Wook,Kim, Ji-Hoon,Jung-choi, Kyunghee,Kim, Hyunjoo BioMed Central 2016 Annals of occupational and environmental medicine Vol.28 No.-
<P><B>Background</B></P><P>Methyl alcohol poisoning has been mainly reported in community. Two cases of methyl alcohol poisoning occurred in a small-sized subcontracted factory which manufactured smartphone parts in Korea.</P><P><B>Case presentation</B></P><P>One young female patient presented with dyspnea and visual disturbance. Another young male patient presented with visual disturbance and myalgia. They treated with sodium bicarbonate infusion and hemodialysis for metabolic acidosis. In addition, he received ethyl alcohol per oral treatment. Her and his urinary methyl alcohol concentration was detected as 7.632 mg/L, 46.8 mg/L, respectively, although they were treated hemodialysis. Results of the working environment measurement showed that the concentration of methyl alcohol (1030.1–2220.5 ppm) in the air exceeded the time weighted average (200 ppm). They were diagnosed with optic neuropathy due to methyl alcohol poisoning and still have visual impairment.</P><P><B>Conclusions</B></P><P>Workers who hired as dispatched employees in a small-sized subcontracted factory were exposed to high concentrations of methyl alcohol. The workplace had poor ventilation system. In addition, workers did not wear proper personal protect equipment. Working environment measurement and annual chekups for workers were not performed. They were in a blind spot to occupational safety and health. More attention is needed to protect vulnerable workers’ health.</P>
Jia, Yu Hong,Ryu, Jae Hun,Kim, Cho Hui,Lee, Woo Kyung,Tran, Thi Van Trinh,Lee, Hyo Lee,Zhang, Rui Hong,Ahn, Dae Hee Elsevier 2012 Journal of industrial and engineering chemistry Vol.18 No.2
<P><B>Abstract</B></P><P>Microbial electrolysis cell is a device which can produce hydrogen gas from biomass through microbial catalyzed process and thus reduce the organic matter. For the real application in wastewater treatment, the scale-up of microbial electrolysis cell is an important issue but few tests were conducted with relatively large size. In this study, a 3.7L microbial electrolysis cell (liquid volume 3.2L) equipped with a membrane electrode assembly cathode was designed and tested. The internal resistance was examined, hydrogen generation and organic removal performance was investigated under different conditions. A maximum overall hydrogen efficiency of 41% was achieved at an applied voltage of 1.2V with acetate as substrate, corresponding to a volumetric hydrogen production rate of approximately 0.12m<SUP>3</SUP> H<SUB>2</SUB>/m<SUP>3</SUP> reactor liquid volume/day. The results obtained in this study could help to further develop pilot-MEC for practical applications.</P>
Persistent Charge-Density-Wave Order in Single-Layer TaSe<sub>2</sub>
Ryu, Hyejin,Chen, Yi,Kim, Heejung,Tsai, Hsin-Zon,Tang, Shujie,Jiang, Juan,Liou, Franklin,Kahn, Salman,Jia, Caihong,Omrani, Arash A.,Shim, Ji Hoon,Hussain, Zahid,Shen, Zhi-Xun,Kim, Kyoo,Min, Byung Il,H American Chemical Society 2018 NANO LETTERS Vol.18 No.2
<P>We present the electronic characterization of single-layer 1H-TaSe2 grown by molecular beam epitaxy using a combined angle-resolved photoeinission spectroscopy, scanning tunneling microscopy/spectroscopy, and density functional theory calculations. We demonstrate that 3 x 3 charge-density-wave (CDW) order persists despite distinct changes in the low energy electronic. structure highlighted by the reduction in the number of-bands crossing the Fermi energy and the corresponding modification Of Fermi surface topology. Enhanced, spin-orbit coupling and lattice distortion in the single-layer play a crucial role in the formation of CDW order. Our findings provide a deeper understanding of the nature of COW order in the two-dimensional limit.</P>
Jia, S.,Ryu, Y.,Kwon, S.W.,Lee, J. Elsevier 2013 Journal of chromatography A Vol.1282 No.-
A novel analytical method consisting of in situ derivatization combined with liquid phase microextraction followed by liquid chromatography-ultraviolet detection (LC-UV) was developed to determine the biogenic amines (BAs) of alcoholic beverages. Nine BAs (putrescine, cadaverine, 1,3-diaminopropane, tryptamine, phenylethylamine, spermidine, spermine, histamine, and tyramine) were derivatized in situ with benzoyl chloride, extracted by dispersive liquid-liquid microextraction based on solidification of floating organic droplets (DLLME-SFO), and then chromatographed by LC-UV. Factors influencing the derivatization and extraction efficiency were optimized, including the reaction buffer pH and concentration, amount of derivatization reagent, reaction time, types and volumes of extraction and dispersive solvents, and extraction time. Under the optimized conditions, the method was linear over 0.05-8.0μgmL<SUP>-1</SUP> with an r<SUP>2</SUP>≥0.992 and exhibited intra- and inter-day precision less than 8.8% and 11.5%, respectively. The limit of detection ranged between 0.005 and 0.01μgmL<SUP>-1</SUP>. The developed method using a basic LC-UV system is sensitive, rapid, convenient, green, and cost-effective. Moreover, it is versatile and practical for the analysis of BAs, as demonstrated by the successful application in four different types of popular alcoholic beverages (white wine, red wine, rice wine, and beer).
Charge density wave order in 2D transition metal dichalcogenides
Hyejin Ryu,Yi Chen,Miguel M. Ugeda,Heejung Kim,Yi Zhang,Hsin-Zon Tsai,Shujie Tang,Juan Jiang,Franklin Liou,Salman Kahn,Caihong Jia,Arash A. Omrani,Ji Hoon Shim,Zahid Hussain,Zhi-Xun Shen,Kyoo Kim,Byun 한국진공학회 2018 한국진공학회 학술발표회초록집 Vol.2018 No.2
김현주,류지아 이화여자대학교 의과학연구소 2016 EMJ (Ewha medical journal) Vol.39 No.4
Although acute occupational poisonings are very rare officially, it seems that there are a considerable number of unreported cases seen from non-intentional poisoning cases of the national injury and poisoning survey on discharged patients. Establishing a proper national surveillance system for acute occupational poisonings is needed. It is difficult for clinical physicians to diagnose acute occupational poisonings appropriately because the victims who usually are not mentally alert can not provide the information on the workplace hazard. Consulting a specialist of occupational and environmental medicine may help to reveal the cause of poisoning. Furthermore, reporting to the public organization such as workers health center and Korea occupational safety and health is helpful to prevent additional injuries.
Fluorescent Nanoparticles for Observing Primo Vascular System Along Sciatic Nerve
Zhao-Feng Jia,Ki-Hoon Eom,Jin-Myung Cha,Jin-Kyu Lee,Zhen-Dong Su,Wen-Hui Yu,Pan Dong Ryu,소광섭,Byung-Cheon Lee 사단법인약침학회 2010 Journal of Acupuncture & Meridian Studies Vol.3 No.3
The primo vascular system was found in the epineurium along the rat sciatic nerve following subcutaneous injection of fluorescent nanoparticles at the Zusanli acupoint (ST-36). Nanoparticles were injected into the primo-vessel near ST-36 and flowed along the sciatic nerve. Fluorescence revealed a structure in the epineurium that was hardly detectable. Images of the isolated sample stained with 4’,6-diamidino-2-phenylindole were captured using confocal microscopy. These images showed the distinctive nuclei distribution and multi-lumen structure of primo-vessels that differentiate them from lymphatic vessels, blood capillaries and nerves. This study demonstrates a new use for nanoparticles in fluorescence reflectance imaging techniques during in vivo imaging of primo-vessels.
Working hours and depressive symptoms
Yeogyeong Yoon,Jia Ryu,Hyunjoo Kim,Chung won Kang,Kyunghee Jung-Choi 대한직업환경의학회 2018 대한직업환경의학회지 Vol.30 No.-
Background: South Korea is one of the countries with the longest working hours in the OECD countries. The aim of this study was to evaluate the effect of working hours on depressive symptoms and the role of job stress factors between the two variables among employees in South Korea. Methods: This study used data from the Korea Working Conditions Survey in 2014. Study subjects included 23,197 employees aged 19 years or older who work more than 35 h per week. Working hours were categorized into 35–39, 40, 41–52, 53–68, and more than 68 h per week. Depressive symptoms were assessed using the WHO’s Well-Being Index with a cut-off score of 13. We calculated prevalence ratios of depressive symptoms according to working hours using log-binomial regression. Through the percentage change in prevalence ratios, we identified the extent of the role of job stress factors that explain depressive symptoms. Results: The risks of depressive symptoms were significantly higher in people who worked 35–39 h per week (PR: 1.09, CI: 1.01–1.18), 53–68 h/week (PR: 1.21, CI: 1.16–1.25), and more than 68 h/week (PR: 1.14, CI: 1.07–1.21) than 40 h/week, after adjusting for confounding variables. Job stress explained the effects of long working hours on depressive symptoms in about 20–40% of the groups working more than 40 h/week. Among the factors of job stress, social support was 10–30%, which showed the highest explanatory power in all working hours. Reward explained 15–30% in the more than 52 h working group, and reward was the most important factor in the working group that exceeded 68 h. Conclusions: We showed the working hours could be an independent risk factor for depressive symptoms in employees. To improve workers’ mental health, it is important to strengthen social support in the workplace, to provide adequate rewards as they work, and ultimately to regulate the appropriate amount of working hours.