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( Chun Zi Xu ),소대화 ( Dea Wha Soh ) 한국동굴학회 2007 동굴 Vol.79 No.-
한반도 지역의 장묘 문화와 고려장의 유래를 살펴본다. 삼국시대로부터 고려사회에 이르기까지는 주로 불교문화의 영향을 받아왔고, 그 후 조선사회에 들어와서 우리 민족은 유교문화에 깊은 관계를 형성하여 왔다. 그러므로 오늘의 우리사회에서도 곳곳에서 유교문화의 깊은 뿌리를 찾아볼 수 있으며, 아직도 우리의 생활문화에서 유교적 관행이나 생활관습을 흔히 느껴볼 수 있다. 이러한 종교 사회적 문화 배경이나 충효사상으로 무장된 우리의 사회상을 살펴볼 때 과연 우리가 전해들은 고려장 문화가 실존적인 것인지에 대하여는 강한 의문과 부정적 사고를 떨쳐 버릴 수 없다. 또한 초식을 즐겨하는 우리 식생활 문화로부터 그들의 온순한 성격이 형성되어 왔던 민족 사회적 정서를 살펴볼 때에도 부모나 가족의 연장자가 늙고 병들었다고 하여 그들을 쉽게 버리고 남은 가족들끼리 편안한 마음으로 살아갈 수 있을까(?)에는 역시 강한 의문점을 뗄 수가 없다. 한국동굴학회의 사업계획에 따라, 중국 길림성 연변조선족자치주 화룡시 근교의 충천계곡(골) 자연동굴을 탐사하고, 고려장 굴이라고 전해오는 석실무덤을 답사하였다.
Chun, Yu Sung,Xuan, Zi,Kim, Ju Hyun,Lee, Sang-gi American Chemical Society 2013 Organic letters Vol.15 No.12
<P>A novel divergent tandem one-pot method for the synthesis of 3,5,6-trisubstituted 1<I>H</I>-pyrimidin-2,4-dione derivatives is developed. In the presence of 10 mol % of Cu(OAc)<SUB>2</SUB>, the α-substituted Blaise reaction intermediates (R<SUP>2</SUP> ≠ H) reacted with isocyanates chemoselectively to afford pyrimidin-2,4-diones, whereas the α-unsubstituted Blaise reaction intermediate (R<SUP>2</SUP> = H) showed a propensity to be a C-nucleophile toward electrophiles, permitting the installation of different functionalities at the 5-position through sequential tandem reactions.</P><P><B>Graphic Abstract</B> <IMG SRC='http://pubs.acs.org/appl/literatum/publisher/achs/journals/content/orlef7/2013/orlef7.2013.15.issue-12/ol401389j/production/images/medium/ol-2013-01389j_0008.gif'></P><P><A href='http://pubs.acs.org/doi/suppl/10.1021/ol401389j'>ACS Electronic Supporting Info</A></P>
Effect of Ni3Al Inelusion on Pore Structure in the Porous Anode for Molten Carbonate Fuel Cell
Chun, Hai Soo,Kim, Yun Sung,Choo, Hyun Suk,Shin, Min Cheol,Hong, Ming Zi,Lim, Jun Heok 한국화학공학회 2000 Korean Journal of Chemical Engineering Vol.17 No.5
Microstructural changes in pure Ni, Ni/(4-10 wt%)Ni₃Al and Ni/5 wt%Ni₃Al/5 wt%Cr anodes for molten carbonate fuel cell were investigated by sintering experiment. Submicron-sized Ni₃Al intermetallic particles were dispersed in nickel powders to improve mechanical strength by dispersion strengthening and to control both densification and pore structure of these anodes during sintering. The mechanical strengths of Ni/7 wt%Ni₃Al and Ni/5 wt%Ni₃Al/ 5 wt%Cr anodes were considerably higher than that of the pure Ni anode by strong bonding between small nickel grains. Pore volume in the anodes which included Ni₃Al was considerably high by impeding nickel grain growth, because the retarding force exerted by the Ni₃Al inclusion obstructed the nickel grain boundary movement. Pore structure in the anodes was maintained in a relatively stable open network in contrast with that in the pure Ni anode.
Effect of fenpropathrin on the viability and homing ability of worker bees Apis mellifera
Chun-hua Liao,Jie Wu,Zi-long Wang,Zhi Jiang Zeng,Xiaobo Wu 한국응용곤충학회 2017 Journal of Asia-Pacific Entomology Vol.20 No.4
To explore the effect of fenpropathrin on survival and homing ability of honeybees Apis mellifera L., the newly emerged honeybee workers (< 12 h old) were randomly divided into 4 groups with 3 replicates in each group. Fenpropathrin (1/2 LD50, 1/4 LD50, 1/8 LD50 and 0% LD50) was added on the thorax of the bees. The viability of worker bees and their homing rate at 1 km distance away from colonies were analyzed, and the expression levels of two memory related genes (GluRA and Nmdar 1) in 20-day–old worker bees were also quantified. Overall, the lifespan and homing rates were significantly decreased with the increase of fenpropathrin dose (P < 0.05), but there was no significant difference between the least group (1/8 LD50) and the control group (0% LD50) (P > 0.05). The relative expression of Nmdar1 was decreased significantly with the increasing doses of fenpropathrin and the lower expression level of Nmdar 1 was found in the fenpropathrin-treaded groups. The expression level of GluRA of workers in 1/8 LD50 group and the control group were significantly higher than that in 1/2 LD50 group and 1/4 LD50 group (P < 0.05), whereas the expression level of GluRA of workers in 1/4 LD50 group was significantly higher than that in 1/2 LD50 group (P < 0.05), and there is no significant difference between 1/8 LD50 group and the control group (P > 0.05). In conclusion, the use of fenpropathrin for agricultural crops may show negative influence on the viability and homing ability of worker bees Apis mellifera L.
Wang, Zi-Xuan,Yuan, Chang-Qing,Guan, Jun,Liu, Si-Liang,Sun, Chun-Hui,Kim, Seong-Hwan Asian Pacific Journal of Cancer Prevention 2012 Asian Pacific journal of cancer prevention Vol.13 No.1
Objective: To investigate the psychological characteristics of hepatic malignancy patients before interventional procedures and assess associations with related factors. Methods: Two hundred and thirteen patients requiring interventional procedure for hepatic malignancy were asked to complete a survey of health knowledge and psychological symptom on health knowledge questionnaire and SCL-90 before interventional procedure. Logistic regression analysis was employed to determine the association of various demographic, clinical and health knowledge factors with the presence of psychological symptoms in patients. Results: Eight psychological symptom scores, i.e. somatization, obsessive-compulsive tendencies, depression, anxiety, hostility, phobia, paranoid ideations and psychotic states, were significantly higher than the normal range (P< 0.001). Of 213 cases in the study, 49 families (23.00%) concealed the diagnoses of hepatic carcinoma from patients; 135 patients (63.38%) described the prognosis of the disease correctly. It was demonstrated that the correlations between psychological symptoms and related factors, i.e. age, gender, education, interventional procedure times and health knowledge, were statistically significant (P<0.05). Conclusion: Psychological distress is severe in hepatic malignancy patients before interventional procedures. Age, gender, education, interventional procedure times and health knowledge are associated with psychological symptoms which are significant different from the normal range in Chinese.
정의만,Chun Zi Jin,장지현,Zai Hao Zhao,Chun Li Jin,이진항,이기백,김성준,김인규,Yin Hua Zhang 생화학분자생물학회 2018 Experimental and molecular medicine Vol.50 No.-
The myocardium in hypertensive heart exhibits decreased fatty acid utilization and contractile dysfunction, leading to cardiac failure. However, the causal relationship between metabolic remodeling and cardiomyocyte contractility remains unestablished. Transglutaminase 2 (TG2) has been known to promote ATP production through the regulation of mitochondrial function. In this study, we investigated the involvement of TG2 in cardiomyocyte contraction under fatty acid supplementation. Using TG2 inhibitor and TG2-deficient mice, we demonstrated that fatty acid supplementation activated TG2 and increased ATP level and contractility of cardiac myocyte from the normal heart. By contrast, in cardiac myocytes from angiotensin-II-treated rats and mice, the effects of fatty acid supplementation on TG2 activity, ATP level, and myocyte contraction were abolished. We found that TG2 was inhibited by S-nitrosylation and its level increased in hypertensive myocytes. Treatment with inhibitor for neuronal NOS restored fatty acidinduced increase of TG2 activity and myocyte contraction. Moreover, intracellular Ca2+ levels were increased by fatty acid supplementation in both normal and hypertensive myocytes, showing that S-nitrosylation of TG2 but not alteration of intracellular Ca2+ levels is responsible for contractile dysfunction. These results indicate that TG2 plays a critical role in the regulation of myocyte contractility by promoting fatty acid metabolism and provide a novel target for preventing contractile dysfunction in heart with high workload.