도파민 과다활동이 저지수행에 미치는 영향 : Effects Apomorphine and Haloperidol Induced Supersensitivity

조옥경,김기석 한국심리학회 1990 한국심리학회지 생물 및 생리 Vol.2 No.1

본 연구는 중추신경계의 도파민 활동을 증가시키는 처치가 흰쥐의 저지학습에 미치는 영향을 알아보기 위한 것이다. 저지학습은 표준 왕복회피 상자에서 관찰하였는데 1단계 훈련에서는 소리를, 2단계 훈련에서는 불빛과 소리로 이루어진 복합자극을 전기쇼크를 알리는 신호로 사용하였다. 검사시행에서 이들 자극을 단독으로 제시하여 각 자극에 대한 조건화 정도를 측정하였으며 새로운 불빛 자극 하나를 더 첨가하여 이에 대한 반응의 정도도 관찰하였다. 실험 1에서는 도파민 효능제인 아포모르핀 1㎎/㎏를 투여한후 저지학습의 장애를 관찰하였다. 실험 2에서는 할로페리들을 장기투여하여 도파민 수용기가 과민해진 경우에 나타나는 저지학습의 장애를 관찰하였다. 또 도파민 수용기가 과민해진 동물에게 정상 쥐에서는 행동적 효과가 없는 소량의 아포모르핀을 투여한 경우에도 저지학습의 장애가 일어나는 것을 관찰하였다. 이와같은 저지장애를 부적절한 자극을 무시하는 능력의 장애라는 측면에서 고찰하였다. This study is to examine whether dopamine is involved in the conditioned blocking. In the blocking paradigm, prior training to a conditioned stimulus(CS-A) blocks the ability to attend to a second conditioned stimulus(CS-B) when the two form a compound stimulus(CS-AB) in a subsequent training. Blocking is an associative process by which animal learn to ignore CS-B because it contains no new information regarding the reinforcing event. The blocking effect was assessed in a standard shuttle box. The onset of the tone signalled the footshock in stage 1. In stage 2, the compound stimulus of the tone and the light signalled the shock. The testing stage consisted of 16 nonreinforced presentations each of CS-A, CS-B and a novel dim light stimulus. The blocking ratio was obtained by dividing the number of conditioned avoidance responses (CAR) emitted to the light by the total number of CARs emitted to both light and tone. Experiment 1 showed that 1㎎/㎏ apomorphine attenuated the blocking effect. In experiment 2, blocking was also disrupted with 0.1㎎/㎏ apomorphine coupled with dopamine receptor supersensitivity produced by prolonged pretreatment with haloperidol. These results suggest that dopamine hyperactivity in the brain disrupted blocking which is interpreted as a selective attention deficit. This attentional deficit bears some resemblance to attentional disorder seen among schizophrenic patients.

重化學工業機械의 國産化方案에 關한 硏究 : 特히 窯業에 있어서의 燒成爐, 粉碎機, 排風機, 冷却機, 電氣集마器 自動枰量供給器 等의 製作을 目的으로

趙哲衡,朴碩喆,丁太權,宋鐵,桭達福,金基玉,朴煥奎,趙煥從,朴善鐘,金種一,李茂錫 朝鮮大學校 1977 綜合論文集 Vol.1977 No.-

This is to investigate the posibility of home manufacturing of heavy chemical industry machines, such as rotary kiln, crusher, blower, cooler, electrostatic precipitator and weighing feeder of cement plant. It is concluded that even though we can not make all of them (some of them are made now and some others are going to be made in the near future, some of them are made whole and some others are made partially), we can build or export the cement plant by importing the important machines which we can not make now and by substituting them with ours gradually.

상부 조기 위암 환자의 복강경하 상부 위절제술 3례 경험

조규석,김형철,박경규,이문수,송옥평,임철완,신웅진,주종우,유기원 순천향의학연구소;Soonchunhyang Medical Research Institute 2004 Journal of Soonchunhyang Medical Science Vol.10 No.2

Background : The reported incidence of early gastric cancer located in the upper portion of the stomach has been increasing with the recent advances in its diagnosis and screening. Recently, we have successfully performed laparoscopic assisted proximal gastrectomy and gastric tube reconstruction without pyloroplasty on three patients with early gastric carcinoma localized to the upper third of the stomach. We describe our modification of this procedure in this report. Method : After creating an surgical pneumoperitoneum, the stomach was mobilized using laparoscopic coagulating shears. Upper half of the greater curvature and three-quarters of the lesser curvature were then dissected along with regoinal D2 lymphadenectomy. This was followed by a 5 cm, longitudinal mini-laparotomy in the upper abdomen, and the construction of the exteriorized stomach with a gastric tube measuring 20 cm long and 4 cm wide. Reconstruction with an esophagogastrostomy was performed using a circular stapler. Result : No post-operative morbidity or mortality was observed in this small series of patients. The average operative time was 250 minutes (range 220-300 minutes), and the average blood loss was 150 ml (range 90-180 ml). The mean number of lymph nodes harvested during these laparoscopic proximal gastrectomies was 24 nodes (range 22-25 lymph nodes). The average postoperative hospital stays was 7.5 days (range 7-8 days). Conclusion : Our technique of laparoscopic assisted proximal gastrectomy and gastric tube reconstruction without phloroplasty offers a minimally invasive technique with the potential of impoving the post-operative quality of life patients with an early-stage proximal gastric cancer.

청반손상 후에 L-dopa 를 투여한 쥐에서 나타나는 주의장애

조옥경,한정수,김기석 한국심리학회 1989 한국심리학회지 생물 및 생리 Vol.1 No.1

도파민 효능제인 L-dopa를 쥐에게 투여하면 강화와 짝지어지지 않은 부적절자극을 무시하는 주의 과정에 장애가 나타난다. 이같은 장애는 청반을 파괴하여 대뇌 노어에피네프린계의 이상을 초래한 경우에도 나타나므로 청반손상 후에 L-dopa를 투여하면 주의장애가 심해질 것으로 예상하였다. 왕복상자에서 회피반응을 쥐에게 학습시킨 후 검사시행에서는 훈련에 사용되었던 소리자극을 전기쇼크없이 제시하는 중간중간에 부적절자극인 빛자극을 무선적으로 제시하였다. 실험 결과, L-dopa집단이 주의장애를 보였고 청반손상집단은 주의장애가 없었으나 청반손상과 L-dopa 투여가 같이 처치된 집단은 부적절자극을 무시하는 능력에 상당한 장애를 보였는데 이는 L-dopa 단독 투여 효과를 훨씬 넘어서는 것이었다. 이같은 결과는 주의과정에 도파민과 노어에피네프린이 상호작용할 가능성을 시사하며 이는 정신분열증 환자에서 나타나는 주의장애에 대한 동물모형을 제시해 줄 수 있다고 생각된다. The attentional process by which animals learn to ignore an irrelevant stimulus was examined after the treatment with L-dopa or bilateral electrolytic lesions of locus coeruleus(LC). Rats received daily 100 trials of two-way avoidance training in which each trial was initiated by a 10-sec tone stimulus and terminated either by a shuttle response during the tone(avoidance) or by a response during the electric shock(escape). The training sessions continued until the animals met a criterion of eight avoidance responses during any ten consecutive trials. The same rats then received a 50 trials test session. A light, which was irrelevant because it had never been paired with shock, was randomly presented during the test period. The administration of L-dopa produced marked impairment in tuning out the irrelevant stimulus, but LC lesion group did not show any attentional deficits. When L-dopa injection was superimposed to LC lesions, the deficit was increased. It may be interpreted that the result is due to an interaction between the noradrenergic and dopaminergic system. This interaction in ignoring an irrelevant stimulus may provide an animal model of selective attention deficit observed among some schizophrenic patients.

점적상에서의 수력학 특성

조지훈,성기천,함병호,김태옥 明知大學校 産業技術硏究所 1991 産業技術硏究所論文集 Vol.10 No.-

Hydrodynamics was investigated in a trickle bed with spherical particles. Flow transition boundary, pressure drop, and liquid holdup were measured and analyzed in an air-water system. The results showed that liquid velocity at trickle-pulse transition boundary increased with increasing packing size and it decreased with increasing gas velocity, and that the theoretical model proposed was well applicable to predicted flow transition boundary. In the same operation conditions, flow characteristics was changed with operation mode because of liquid closslinking. Therefore, as the maximum gas velocity increased, pressure drop increased. Also, pressure drop increased with increasing fluid velocity and it increased with decreasing packing size, and the effect of gas velocity on pressure drop for higher liquid velocity was less than that for lower liquid velocity. Liquid holdup increased with increasing liquid velocity and it decreased with increasing packing size, and the influence of gas velocity on liquid holdup for pulse flow regime had larger than that for trickie flow regime. By contrast, the influence of packing size on liquid holdup for pulse flow regime had less that for trickle flow regime. In this conditions, correlations of pressure drop and liquid holdup were proposed in terms of Reynolds numbers of total fluids and liquid phase.

원예치료 및 미술치료가 학교 부적응 청소년의 자아개념 향상에 미치는 영향연구

손기철,엄수진,배혜진,조문경,은옥주,최외선 충북대학교 한국과학재단 지정 첨단원예기술개발 연구센터 2002 연구보고서 Vol.6 No.-

본 연구는 원예치료와 미술치료가 학교부적응 청소년의 자아개념, 내적 통제력, 불안감소에 미치는 영향을 조사하고자 실시되었으며, 그 결과는 각 치료의 효과성이 비교·분석되었다. 인천 남구에 위치한 W공업고등학교에서 대조군 15명, 원예치료군 15명, 미술치료군 15명을 주 2회씩 2001년 9월 27일부터 12월 13일까지 원예치료군에는 원예치료 프로그램을 미술치료군에는 미술치료프로그램을 실시하였다. 원예치료 및 미술치료는 각각 전문 치료사에 의해서 행해졌다. 원예치료 및 미술치료 프로그램의 효과를 알아보고자 자아개념(Self-Concept Scale), 내적 통제력 척도(Inner-Control Scale), 특성불안 척도(Trait-Anxiety Scale)을 각 프로그램의 실시전과 실시후로 조사하여 비교하였다. 원예치료군에 있어서는 자아개념척도 중 자아수용, 성격적 자아, 총 자아 긍정 항목에서 통계적으로 유의한 향상을 보였고, 특성불안척도에서는 우울 및 불안 항목에서 매우 유의한 감소를 나타내었다. 한편, 미술치료군에 있어서는 내적통제력과 특성불안척도중 자신감이 유의하게 향상된 것으로 나타났다. 이상의 결과를 종합하여 볼 때, 원예치료군은 프로그램 과정중 자기표현의 기회를 제공함으로써 자아개념이 향상되었으며, 또한, 공동작업을 하는 집단 프로그램을 통하여 내면의 불안과 갈등이 완화되었다고 판단된다. 반면, 미술치료군은 치료자와의 개인적인 상담과정을 통하여 내면의 불안과 갈등이 완화되었고, 지점토 및 칼라믹스 만들기 등 활동적인 프로그램을 통하여 내면의 감정을 통제하는 능력이 향상되었다고 판단된다. This study was conducted to evaluate the effect of HT (horticultural therapy) and AT (art therapy) on the changes of self-concept, inner control, trait anxiety of the school maladjusted adolescents. 45 school maladaptive of teenage students participated in therapy program at the W high school were randomly assigned to 3 groups: 15 for the horticultural therapy, 15 for art therapy, 15 for control group. The program were carried out from Sep. 27 to Dec. 13, 2001 as an activity group. Activity group attended twice a week for 1 hour. For evaluation of the effectiveness of each therapy, Self-Concept Scale, Inner-Control Scale, Trait-anxiety Scale were used 2 times, that is, before/after HT or AT program. According to the results, self satisfiction, personal self, and total positive self items among Self-Concept Scale were significantly improved, and tension and anxiety item among Trait anxiety Scale were significantly decreased in HT group. On the other hand, in AT group, both inner control and self confidence item in Trait-anxiety Scale were significantly improved. In conclusion, in HT group it was suggested that the improvement of self concept could be brought about by being provided the chance of self expression during program and the alleviation of inner anxiety and discord resulted from group therapy program in which joint work have been provided. In case of AT group, it was logically postulated that the alleviation of inner anxiety and discord resulted from personal counselling with AT therapist during program and the improvement of inner control was caused by active program such as painting paper clay, making color mix, and etc.

지역사회 엘리트의 행태에 관한 연구 : 대구지역 엘리트의 정책참여태도를 중심으로

조용상,최봉기,김옥준 계명대학교 사회과학연구소 2000 한국사회과학연구 Vol.19 No.1

폐결핵 환자의 우울 상태

홍정표,최선희,조만종,이성주,박종,김기순,김양옥 朝鮮大學校 附設 醫學硏究所 1997 The Medical Journal of Chosun University Vol.22 No.1

The main purpose of this study is to identify and evaluate the depressive states for the patients with chronic pulmonary tuberculosis. A questionnaire(Self-rating Depression Scale, SDS) survey was performed toward 57 pulmonary tuberculosis patients with initial treatment who started chemotherapy and 53 pulmonary tuberculosis patients with retreatment, admitted to one tuberculosis-centered hospital and two general hospital. Fifty three healthy persons as control group were investigated with the same questionnaire for comparison. The survey was performed from July to August 1996. The results are as follws : 1. The patients had significantly high scores in the depression than control and the patient with retreatment showed significantly high scores in the depression than the patient with initia1treatment(P<0.01). 2. The depressive levels of the patients were associated with duration of admission and the expectancy of recovery (P<0.05). 3. The percentage of the subjects with 40 or more scores tentatively classifiable as psychologically depressed was 67.1% of the total subjects, 48.4% of the control groups, 75.0% of the patient with initial treatment and 84.1% of the patient with retreatment. Because patient with pulmonary tuberculosis with initial treatment showed higher depression scores than normal persons, and patients with retreatment due to failure of initial treatment showed higher depression scores than initial treatment, it is necessary to give attention to depression of the patients during treatment of pulmonary tuberculosis.

다발성 대장암 간전이 환자의 간절제를 위한 새로운 시도

주종우,김형철,임철완,신응진,조규석,유기원,송옥평,홍대식,박성진,조준희,이혜경,김희경,권계원,고은석 순천향의학연구소;Soonchunhyang Medical Research Institute 2004 Journal of Soonchunhyang Medical Science Vol.10 No.2

Multiple bilobar liver matastases (MBLM) are the main cause of low resectability in the colon cancer liver metastases. The authors experienced one case of initially non-resectable colon cancer liver metastases. He was curatively and safely treated with a two-stage hepatectomy using the new method of future remnant liver volume growing. A 54-year-old man was referred to our department with the sigmoid colon cancer combined with MBLM, which were checked in two small metastatic lesions in the left lobe and five large sized lesions in the right lobe in the computed tomogram (CT). A laparoscopic assisted anterior resection was primarily performed. We performed the 1^(st) stage hepatectomy 3 weeks after the colon resection. Intra-operative Ultrasonogram (US) found 9 small superficial metastatic lesions in the left lobe. All that lesions were completely removed by non-anatomical wedge resection. An occlusion ballon catheter was placed in the right portal vein through a small branch of the inferior mesenteric vein at that time. The future remnant liver volume was sufficiently increased 3 weeks after the 1^(st) hepatectomy. A right hepatectomy was safely performed 22 days after the 1^(st) hepatectomy. The patient received a regional chemotherapy (interleukin2 based immuno-chemotherapy through hepatic artery) for 4 months, then received 9 cycles of systemic chemotherapy (biweekly Oxaliplation, leucovorin, plus 5-fluorouracil) without any recurrence evidence.

MgCl₂溶液內에서 STS 304 HP Stainless Steel 熔接部의 破壞擧動에 對한 硏究

金永奭,丁太權,朴昌彦,洪錫柱,梁仁榮,金基玉,朴煥奎,李茂錫,曺圭宰,鄭在康 조선대학교 생산기술연구소 1983 生産技術硏究 Vol.1983 No.-

This paper is based on an experiment analysing the stress corrosion cracking behaviour of welding specimens compared to that of non-welding specimens of STS 304 HP stainless steel in corrosion solution. As a corrosion condition, stainless steel has been known to be the most fragile in a solution of 42% MgCl₂heated to the boiling point, therefore the experiment was carried out in this condition. The experiment was carried out with argon gas TIG welding specimens and non-welding ones made of stainless steel plates, thickness 2mm, by tensile force. At this time, the tensile force was taken to be the value of the yield strength of the tensile test specimens divided by the safety factor of 3.0 to 3.5, 4.0, 4.5, and 5.0. In this paper, the relations between Time of Initial Crack, Time of Failure, Time of Final Fracture and Crack Propagation Length were investigated and then plotted. Furthermore, the relations between Stress Intensity Factor K proposed by Irwin and the Time of Initial Crack, the Time of Failure, the Time of Final Fracture were calculated and plotted. At the last, all the relations plotted were expressed to normal equations by computer, and the equations were used to analyse the data obtained in the experiment. The conclusions obtained in this study are as follows: 1. Welding materials, compared with non-welding ones, as the Time of Initial Crack, the Time of Failure, and the Time of Final Fracture were generally very fast, appeared to be a phenomenon of unstable brittleness fracture. 2. Non-welding materials, compared with welding ones, as the safety factor was larger or the working stress was smaller, appeared to be a phenomenon that the longer had had greater durability. Therefor, welding materials must be considered enough to be used in heate affected and stress corrosion atmosphere. 3. The normal equations of the Time of Initial Crack and the variation rate to the same Stress Intensity Factor K are as follows: (A) Non-welding T =259702.4-5451.2 K+28.386 K² T = -5451.2+28.386 K (B) Welding T= -332.693+28.043 K-0.211 K² T' =28.043-0.211 K here, T; Time of Initial Crack, T'; Variation Rate of Time of Initial Crack to Stress Intensity Factor K, K ; Stress Intensity Factor.