급성 일산화탄소 중독 및 회복기의 흰쥐 전립선 Acid phosphatase 활성도의 변화

배기원,유진화,이흥식 대한해부학회 1976 Anatomy & Cell Biology Vol.9 No.2

흡착 우라늄 이온의 전기 탈착거동

정종헌,원휘준,최왕규,김계남,이성호,오원진 한국공업화학회 2003 응용화학 Vol.7 No.1

Liquid wastes containing uranium ions in high concentration of chemical salts havebeen treated by electrosorption on a activated carbon fibers(ACFs) electrode. Effectiveuranium (VI) removal is accomplished when the potential is -0.5V(vs. Ag/AgCl) ormore negative. For a feed concentration of 100mg/1, the concentration of U(VI) in thecell effluent is reduced to less than 1mg/1, and electrosorption capacity over 500mg/uranium/gACF is reached. The adsorbed uranium can be desorbed up to 99%for 20h by passing a 1.9N NaCl solution at pH 3 through the cell and applying a potential of +1.2V. The amount of desorbed uranium increased as the solution pHwas lowered and the applied potential increased.

우라늄 오염 금속표면의 제염을 위한 UO_2 용해특성 연구

이성열,최왕규,오원진,유승곤 한국공업화학회 2003 공업화학 Vol.14 No.3

국내의 가동 중지된 우라늄 변환시설의 해체 시 대량으로 발생될 탱크류 및 배관 등 공정 계통 부품으로 이루어진 금속 폐기물의 재팔용 또는 자체처분을 위한 현장 제염기술로 질산 제염공정을 선정하였다. 오염 물질로써 UO_2를 대상으로 UO_2 입자의 용해 거동을 통해 우라늄 화합물로 오염된 금속 폐기물에 대한 질산 용액의 표면제염 적용성을 평가하였고, 우라늄 변환시설 내에서 직접 인출한 UO_2 오염 시편의 제염 실증실험을 통해 제염 공정의 성능을 검증하였다. 질산 제염 용액에서 UO_2 입자의 용해속도는 질산의 농도 및 용액의 온도에 크게 의존하였으며, 산화제로 H_2O_2를 첨가함에 의해서 상온의 저 농도 질산 제염 용액 내에서도 H_2O_2가 첨가되지 않은 경우에 비해서 속도가 현저하게 증가되었다 UO_2로 오염된 시편의 제염에 있어서, H_2O_2가 첨가되지 않은 질산 용액 내에서의 제염계수는 α 방사능에 대해서는 1.8~2.7, β 방사능에 대해서는 1.8~2.3인 반면에 질산 용액에 H_2O_2를 첨가한 경우에는 α 방사능에 대해서 61.7~338.5, β 방사능에 대해서는 20.1~92.4를 나타냄으로써 H_2O_2를 첨가함에 의해서 상온, 저농도 질산 용액 내에서도 UO_2 오염된 금속표면을 효과적으로 제염할 수 있음을 확인하였다. In this study, a decontamination process using nitric acid was selected as an in-situ technology for recycle or disposal of large amount of metallic wastes, which includes process system components such as tanks, piping, etc that are generated as a result of dismantling retired uranium conversion facility in Korea. The applicability of nitric acid solution for surface decontamination of metallic wastes that are contaminated with uranium compounds was evaluated through dissolution of UO_2 powder. The decontamination decontamination performance are verified using UO_2 contaminated specimen that came from an uranium conversion facility. Dissolution rate of UO_2 powder was dependant considerably upon nitric acid concentration and solution temperature. Notable enhancement of dissolution rate was achieved by addition of H_2O_2 as an oxidant even in the condition of low concentration of nitric acid and low temperature. The results for decontamination of the specimen contaminated with UO_2 showed that the decontamination factors (DFs) for nitric acid solution without H_2O_2 were 1.8~2.7 and 1.8~2.3 for α and β-radioactivity. respectively, while DFs for nitric acid solution containing H_2O_2 were 61.7~338.5 and 20.1 ~92.4 for α and β-radioactivity, respectively. Thus, the metallic surfaces contaminated with UO_2 can be decontaminated effectively with low concentration of nitric acid at mom temperature in the presence of H_2O_2.

Formation of Ohmic Contact to AlGaN/GaN Heterostructure on Sapphire

Zin-Sig Kim,Hokyun Ahn,Jong-Won Lim,Eunsoo Nam 한국진공학회 2014 한국진공학회 학술발표회초록집 Vol.2014 No.2

精神症狀에 대한 韓國人의 態度調査

元鎬澤,洪元植,張煥日,陳聖太,金光日,李基南,嚴龍燮,金明正 大韓神經精神醫學會 1973 신경정신의학 Vol.12 No.1

Korean psychiatrists are more apt to take the abnormal drinking behavior lightly and regard the psychosomatic symptoms as more serious, comparing with American psychiatrists. On the other hand, physicians as well as adults from the population in Korea are less concerned about the neurotic and psychosomatic symptoms and alcoholic behavior as psychiatric problems. It is the authors' concern to understand such differences in opinion about abnormal behaviors from the cultural and social psychiatric view point. The authors used Dohrenwend's questionaire form of 45 mental symptoms and three additional items i. e., homosexual behavior, symptom of senile psychosis and delusion of jealousy following the authors' interests. Each item was rated by three point cale (psychiatrically very serious=2 points, somewhat serious=1, not serious at all=0) and evaluated with critical ratio. As a preliminary study, the reliability of this questionaire was confirmed by the test-retest method; Spearman's rho was 0,93. The subjects in this study consist of 50 psychiatrists, 49 physicians, 54 herb practitioners and 154 adults from the normal population(60 urban samples and 94 rural samples). The collection was carried out by individual interviews for the physicians and normal samples, by letters for the psychiatrists and the herb practitioners. And the data of American psychiatrists compared in this study were quoted from Dohrenwend's report(27). This study has two parts: one is the cross-cultural comparison between American psychiatrists and Korean ones, the other is intracultural comparison among psychiatrists, physicians, herb practitioners and normal population samples. Inspite of the general notion that Korean psychiatry has been much oriented to American psychiatry for over twenty years, there are definite differences in opinion about the severity of abnormal behaviors between American and Korean psychiatrist, especially about alcoholic behavior and psychosomatic symptoms. Such differences are possibly interpreted as arising from the cultural differences. The American psychiatrists seem to be more concerned about alcoholic behavior probably due to the strict attitude of people and/or the fact that the United States reveals the highest incidence of alcoholism throughout the world. The Korea psychiatrists, however, have much tolerable attitude toward alcoholic behavior according to the cultural tradition. Solitary drinking is hardly found in Korea; drinking in Korea is a suitable way of interpersonal contact. They drink slowly and are not so intensively dependent upon alcohol itself. Dependency need to alcohol can be diffused to the other persons. And they take alcohol with many kinds of side-dishes. These drinking manners seem to be cultural virtues for low incidence of alcoholism in Korea. Thus, Korean psychiatrists as well as adults from normal population have highly tolerable attitude toward alcoholic behavior. Even when some person reveals a destructive behavior after drinking, they grant it as a personal charm. Korea psychiatrists, therefore, are not so nervous about the alcoholic behavior. On the other hard, the psychosomatic problems seem to be serious in Korean mental patients. They are easily apt to express their emotional problems as somatic symptoms possibly due to the disease concept of oriental herb medicine that has a high tendency of projection of emotional conflicts unto the soma. So most of Korean people are not aware that psychosomatic symptoms are originated from the emotional problems, and quite contrary to it, the psychiatrists may be highly conscious of psychosomatic symptoms. Another significant difference is seen in suicidal idea and suspiciousness: American psychiatrists regard them as more serious, and reversely Korean psychiatrists regard them as less serious. Such a pattern may also be derived from the socio-cultural differences. When Koreans are either dissapointed or delighted, they say frequently "I want to die" or "It's funny to death" and so on. This idiomatic expression is far from the real death wish but rather an expression of magnification. And the suicidal idea itself is frequently seen in normal population even suicidal attempt is evaluated as abnormal in Korea. With such reasons, Korean psychiatrists may notice suicidal idea as less serious than American psychiatrists. And the suspiciousness may be a way of living for the people under the historical turmoil and vigorous aculturation, that it is perceived as not so abnormal. The next problem is the marked discrepancy of opinion about abnormal behaviors among psychiatrists, physicians, herb practitioners and normal population samples. The agreement of physicians, herb practitioners, urban samples and rural samples with the psychiatrists on the relative severity of symptoms revealed as Spearman's rho of 0.79, 0.59, 0.58 and 0.44 respectively. It is the main point of problem that physicians are less aware of neurotic symptoms which can appear in the somatic illness, and of psychosomatic symptoms as psychiatric problem. Possible reason is that Korean physician have been oriented to the somatic medicine without proper psychosomatic orientation. On the other hand, the herb practitioners are apt to ignore the severity of psychotic symptoms and on the other, regard the neurotic and psychosomatic symptoms as much as psychiatrists' opinion. And the samples of normal population regard the neurotic symptoms as more serious than the psychotic symptoms, and are not aware of the psychosomatic symptoms as psychiatric problems. Physicians, herb practitioners and samples from the normal population underestimate the alcoholic behavior more than psychiatrists do. The alcoholism according to physicians' opinion is rather somatic problem than psychological one. The herb practitioners and adults from normal population manifest the prominently tolerable attitude toward alcoholic behavior. In conclusion, two kinds of problems can be suggested. One is that the difference between Korean and American psychiatrists in the evaluation on the severity of abnormal behaviors, is possibly due to sociocultural differences. The other is the intracultural difference among psychiatrists, physicians, herb practitioners and adults from normal population. Such a difference suggests that there is a considerable cultural lag in the disease concept and attitude between the modern psychiatry and the cultural tradition. This discrepancy can result in the undesirable wandering of patients for seeking the treatment and some hardship in modern psychiatric practitioning in Korea.

Studies on Electrokinetic Remediation of Radioactively Contaminated Soil By Using Sulfuric Acid

Won-Zin Oh,Gye-Nam Kim 한국방사성폐기물학회 2004 방사성폐기물학회지 Vol.2 No.2

10년 이상 된 방사능오염 토양에서 동전기적 방법에 의한 Cs과 Co의 제염효율을 높이기 위해 HSO과 시트르산을 첨가제로 사용했다. 동전기 토양복원 컬럼의 방출수 평균속도는 2.0 cm/min이고, 10일 동안 방출된 토양폐액의 부피는 컬럼의 3.6 공극부피다. 10일간 Cs 의 제거효율이 54%에 불과한 반면에, Co는 97%나 제거되었다. 이것은 Cs의 흡착평형계수가 Co 보다 크기 때문이라고 생각된다. 본 연구에서 제시한 수학적 모델에 의한 컬럼 잔류 오염도는 실험 오차 범위에서 실험결과와 잘 일치하였다. H2SO4 and citric acid were used as additives for the electrokinetic remediation experiment to increase removal efficiency of Cs and Co from the radioactive soil waste stored for more than 10 years. The average effluent velocity discharged from the elctrokinectic remediation experimental column was 2.010 cm/min and the discharged soil wastewater volume for 10 days is 3.6 pore volume of the column. 97% of Co in the column was decontaminated for 10 days of operation, while only 54% of Cs was decontaminated. These results are considered that the absorption equilibrium coefficient of Cs is higher than that of Co. The predicted values of the residual concentration by the proposed mathematical model were well coincided with the experimental results within the experimental error range

Fixation of $\gamma$-Radionuclides by the PVA-PMAA System

Won, Hui-Jun,Ahn, Byung-Gil,Jung, Chong-Hun,Kim, Gye-Nam,Oh, Won-Zin Korean Nuclear Society 2000 Nuclear Engineering and Technology Vol.32 No.3

A series of laboratory experiments was conducted to investigate the fixation characteristics of poly(vinylalcohol)-poly(methacrylic acid)(PVA-PMAA) mixed solution on the soluble ${\gamma}$- radionuclides. Using the potentiometric titration technique, it was found out that the PVA and PMAA in a solution form intermacromolecular complex. The mobilized portion of each radionuclide by water from sand surface treated with a fixative was measured by ${\gamma}$-ray spectroscopy. The mobilized portion of minor radionuclides such as 241Am, 154Eu, 155Eu and 144Ce were higher than those of 134Cs and 137Cs. The capability of PVA-PMAA system was better among the candidate solutions for the fixation of total ${\gamma}$-radioactivity. 134,137Cs which is composed of more than 85 % of total ${\gamma}$-radioactivity could be fixed effectively by the PVA-PMAA solution.

Optimization of Multi-UAM Point-to-point Network Operation Considering Passenger Priority and Battery Level

Zin Win Thu,Minji-Kim(민지김),Sujin-Kang(강수진),Nan Lao Ywet,Aye Aye Maw,Jae-Woo Lee(이재우) 한국항공우주학회 2023 한국항공우주학회 학술발표회 논문집 Vol.2023 No.4

Inheritance of Leucine Aminopeptidase and Glutamate - oxalate Transaminase Isozymes in Pinus koraiensis

Zin Suh Kim,Won Ha Son,Young Koun Youn 한국임학회 1982 한국임학회 학술발표논문집 Vol.1982 No.-

Using techniques of starch gel zone-electro-phoresis, market variability was detected in the leucine aminopeptidase (LAP) and glutamateoxalate transaminase (GOT) isozyme patterns found in the hapolid endosperm of dry Korean Pine seeds (Pinus Koreiensis S. et Z. LAP-B) of activity on gels stained for leucine aminopeptidase suggests that two loci control each of these isozymes. Electrophoretic variants in each zone segregate randomly with respect to the other zone suppeor this hypothesis. three zones of activity are observed for glutamate-oxalate transaminase. No variations was found in the fasted migrating zone (GOT-A). The other tow zones (GOT-B and GOT-C) display a segregation pattern that ciomcides precisely each other. Whether both zones are controlled by the same locus or whether they represent two tightly linked loci remained unknown at present. Electrophortic variants in GOT-B segregate as alleles at single locus. No evidence of genetic linkage was observed between pairs of loci that were heterozygous in the same mother tree

Performance Analysis Code Development for Preliminary Design of Hydrogen Powered Vertical Takeoff and Landing UAV

Zin Win Thu,Jae-Lyun Lee(이재륜),Vinh Pham,Dong-Gyu Seong(성동규),Jae-Hyun An(안재현),Maxim Tyan(장막심),Jae-Woo Lee(이재우) 한국항공우주학회 2020 한국항공우주학회 학술발표회 논문집 Vol.2020 No.11