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      • SCOPUSSCIEKCI등재

        체성자극에 의한 원심성 미주신경 단일섬유 활동성의 변화

        이훈갑,주정화 대한신경외과학회 1981 Journal of Korean neurosurgical society Vol.10 No.1

        A study has been made of efferent single fibers in the cat whose axon is projected to the cardiac branches of the right vagus. The main objective of this experiment was to replicate some of the mechanisms involving vagal efferent discharges and to observe the effect of somatic stimulation, pain and coldness, on the discharges. Electrical activities of a single of a single fiber were recorded on the central segments of small cut strands separated from the right cervical vagus under the pentobarbital sodium anesthesia. The fiber was considered to be cardio-inhibitory in function because of the activity in inverse effect on the heart rate in almost all conditions. Pain and cold stimulation of skin reflexly excited these fibers, as did stimulation of baroreceptor in the carotid sinus. Response to the somatic stimulation applied on the skin, by the increase of impulse frequency. amplitude, discharge duration and puke rate of electrical discharges were observed. The auther observed that efferent fibers in the cutaneous nerve excited the cardiac efferent vagal fibers in response to reflex stimulation.

      • 忠北地域 벼멸구 系統의 殺蟲劑 低抗性에 關한 硏究

        李炯來,金正和 충북대학교 농업과학기술연구소 1991 農業科學硏究 Vol.9 No.1

        The strains of brown planthopper(BPH), Nilaparvata lugens Stal, which collected on paddy field in Chungbuk province during the late of September to early of October in 1990 were studied to investigates of insecticide resistance and biochemical characteristic. The results are summarized as follows ; 1.In comparison of LD50(㎍/g) by the several insecticides against the collected strains of BPH, the fenthion showed 22.40 at Seoksung strain of BPH and the BPMC showed 6.90 at Cheongju strain of BPH. While, propoxur, carbaryl and carbofuran showed no big differance of the collected strains. 2.In resistant levels of the insecticides against the collected strains of BPH compared with the LD50 level(㎍/g) of susceptible strain of BPH(S-Lab), the BPMC and the propoxur showed highly resistant levels for 7.04 and 3.4 times, respectively. 3.Comparisons of LC50 (ppm) against the collected BPH: with different bioassay methods showed the susceptible trend on spray method > topical microapplication method > dipping method and the trend was with the results of LD50 levels on tested strains of BPH. 4.In comparison of esterase activity against the collected strains of BPH as compared with the susceptible strain(S- Lab) , the activity of β-band showed higher than the results of α-band and the activity of resistant strains in collected BPH showed more higher than susceptible strains of the collected BPH.

      • SCOPUSSCIEKCI등재

        뇌동맥류 파열로 인한 혈종에 관한 임상적 고찰

        이기찬,이훈갑,주정화,김창선,최용일 대한신경외과학회 1982 Journal of Korean neurosurgical society Vol.11 No.1

        The importance of hematoma associated with ruptured aneurysm has been discribed frequently. Hematomas may be intracisternal, intracerbral or subdural and intracerebral hematomas frequently rupture into the adjacent ventricle. The authors have analysed in clinically 33 cases of intracranial hematomas which developed as a consequence of 100 cases of ruptured intracranial aneurysms. Of 100 cases of ruptured intracranial aneurysms, the incidence of hematoma was 33%(33 cases). The most common site of aneurysm associated with hematoma was middle cerebral artery(50%) and anterior cerebral-anterior communicating artery in turn. Intracerebral hematomas are most common(20%), followed by intracerebral and intraventricular hematomas(5%). The incidence of subdural hematomas and intraventricular hematomas is 3% in each. There was no significant difference according to sex. The incidence of hematoma was considerably increased in 30-40 age group. The operative result in 33 cases who have hematomas was favorable (excellent good result) in 36.5%, and was unfavorable (fair-poor result) in 27.4%. The operative mortality was 36.4% and 7.5% in non-hematoma group. Cases of internal carotid artery aneurysms with hematoma carried the highest mortality and the next is anterior cerebral-anterior communicating artery aneurysms. There showed poor result in cases of preoperative grade Ⅳ & Ⅴ, either hematoma or non-hematoma groups. We also analysed the correlations between the frequency of hematoma and the vasospasm, hydrocephalus. Of 33 cases of ruptured aneurysm with hematoma, vasospasm was detected in 8 cases, hydrocephalus was in 6 cases and vasospasm, combined with hydrocephalus was 8 cases. It revealed a tendency of increased mortality in cases of hematoma with vasospasms.

      • SCOPUSSCIEKCI등재

        뇌동맥류를 병발한 Moyamoya병 1예

        이훈갑,조순구,이기찬,주정화 대한신경외과학회 1981 Journal of Korean neurosurgical society Vol.10 No.2

        Moyamoya disease is a particular disease of the circle of Willis which is characterized by its progressive obstruction and associated with different cerebral vascular malformations and infrequently associated with aneurysms. A 23 year old Korean woman was admitted to the Department of Neurosurgery, Korea University Hospital, because of stuporous mentality and Rt. sided hemiplegia. She fell down and almost immediately lost consciousness on the day morning of admission. Neurological findings included neck stiffness, moderatelly bilateral dilated pupils, Rt. sided hemiplegia, positive bilateral Babinski's sign and positive Kernig's sign. Lumbar puncture revealed grossly bloody cerebrospinal fluid. Carotid angiogram revealed marked stenosis of supraclinoid portion of intracranial internal carotid arteries with extensive collateral small arterial net work at the base of the brain. Small aneurysmal sac was visualized at the distal end of the small arterial network probably distal portion of posterior choroidal artery. Brain computed tomograph showed hematoma at the posterior portion of left side thalamic area and in the left lateral ventricle. The patient had operation for removal of hematorna and died on the 2nd day of postoperation. Based on this case, mechanisms of formation cf aneurysms in moyamoya disease are discussed.

      • 진딧물類에 대한 天敵 무당벌레의 捕食能力 및 그들의 選擇毒性에 關한 硏究

        李炯來,金正和 충북대학교 농업과학기술연구소 1989 農業科學硏究 Vol.7 No.2

        The experiment was conducted to evaluate the development of the predacious beetle Hamonia axyridis fed on the aphis Aphis gossypii, the aphidivorous activity of the beetle and the selective toxicity between the beetle and the three aphids, Myzus persicae, Aphis gossypii and aphis citricola at the rate of recommended concentrations of the selected aphidicides in the laboratory. The developmental periods(day) of the larva stage , the pupa stage, the predating after emergence, the preoviposition after mating and the egg of the beetle recorded 12.6, 6.35, 15.29, 15.79 and 2.71, respecitively. The aphidivorous activity greatly differed with the developmental stages of the beetle and the 4th instar consumed ca. 168.9 aphids and the adults consumed ca. 164.2 aphids per day, when provided with an abundant number of the Aphis gossypii. The aphidivorous preference of the beetle within the mixed infestations of the three aphids shown the 100%, 99.2% and 92% for Myzus persicae, A. gossypii and A. citricola, respectively. In studies of the mortality of the 4th and the adult of beetle, the acephate 50 Wp and cyhalothrin 1 Ec shown the highly toxicity as over ca.93%, while the pirimicarb 25 Wp shown the low toxicity as below ca. 4-38%. Also the studies of mortality of the three aphids at the same rate of the che-micals, the Myzus persicae, shown the highly toxicity as over ca.98% at the all chemicals and the A. gossypii and A. citricola shown highly toxicity as over ca.80% at the acephate and the cyhalothrin but the pirimicarb shown the low mortality as below ca.8% against the Aphis gossypii and the Aphis citricola. In these results, the pirimicarb shown the highly selective toxicity between the three aphids and the predacious beetle H. axyridis.

      • KCI등재

        품행장애 청소년을 위한 외래집단정신치료 치료요인

        이후경,김선재,차정화,봉수연,안현주 대한신경정신의학회 2000 신경정신의학 Vol.39 No.2

        연구목적: 집단정신치료는 또래집단을 중요시하는 품행장애 청소년의 치료로서 매우 효과적인 것으로 알려져 있으나 한국에서는 아직 활성화되지 못하고 있다. 이에 따라 저자들은 품행장애 청소년에게 효과적으로 적용될 수 있는 폐쇄형, 동질적인, 시간제한(10회), 외래집단정신치료를 주 1회 실시하였다. 본 연구의 목적은 ①품행장애 청소년을 대상으로 집단정신치료를 시행하여 효과성을 평가하고, ②치료요인을 조사하여, ③ 집단정신치료를 품행장애 청소년에게 효과적이면서 효율적으로 적용될 수 있는 치료방법으로 정착시키는 데 있다. 대상 및방법: 본 연구는 1998년 10월붜 12월까지, 1999년 4월부터 6월까지 두차례에 걸쳐 실시하였다. 대상군은 품행장애 범주에 해당하는 H고교 2학년 여학생 총 18명(4명 도중 탈락), 대조군은 같은 범주에 해당하는 H고교 2학년 여학생 중 치료에 참여하지 않은 총 18명(4명 도중 탈락)이었다. 평가도구로는 프로그램 실시 전후에 자기보고식 비행척도, 공격성척도, 충동성척도을 시행하였고, 매 회기가 끝난 직후 Yalom의 13가지 치료요인척도, 집단치료 만족도 설문지를 시행하였으며, 종결모임시 총평가 설문지를 시행하였다. 결과: 치료요인의 변화를 집단발단단계에 따라 전후반기로 나누어 비교하였을 때, 전반기(1∼5회)에 상위를 차지한 치료요인은 순서대로 실존적인자, 보편성, 카타르시스, 리더와의 동일시, 구성원과의 동일시이었으며, 후반기(6∼10회)에 상위를 차지한 치료요인은 카타르시스, 실존적인자, 리더와의 동일시, 구성원과의 동일시, 구성원의 조언이었다. 전반기에 비해 후반기에 상대적으로 카타르시스, 구성원의 조언이 상승하였고 보편성은 하락하였다. 이타주의와 일차가족집단의 교정적 반복발달은 전후반기 모두 최하위를 기록하였다. 집단치료 만족도 설문에서 전반기는 45.7%, 후반기에는 83.3%가 도움받는 것으로 나타났고, 총평가 설문에서 85.7%가 기회가 있다면 다음에도 참여하고 싶다고 보고하였다. 결론: 시간제한 외래집단정신치료가 품행장애 청소년 에게 적용할 때 매우 효과적이면서도 만족도가 높은 것으로 나타났다. 청소년을 대상으로 외래집단정신치료를 시행하는 것은 구성상의 어려움, 동기부족, 기금부족 등, 여러 제반 문제가 있으나 확대 시행되어야 할 것으로 생각된다. Objectives: Group psychotherapy is known to be an dffective treatment program for adolescents who attach importance to peer relationship, but it is not activated in Korea. Therefore, researchers performed weekly the closed, homogeneous, time-limited(10 sessions), outpatient group psychotherapy for adolescents with conduct disorder. Objectives of this study were as follows ; first, we practiced the group psychotherapy for adolescents with conduct disorder and evaluated its effectiveness ; second, we examined the therapeutic factors which were used by participants ; third, we intended to settlee down the group psychotherapy for adolescents with CD as an effective and efficient treatment modality. Methods: This study was performed two times from October to December in 1998 and from April to June in 1999. It was sponsored by Youth Counselling Center in H city. The case group were composed of 15 female students who were second grade in H high school, and 4 students were dropped out. The control group were composed of 18 female students who were same grade in H high school and 3 students were dropped out. Before and after this program, self-report delinquency scale, aggression scale and impulsivity scale were asked to them. And just after each session, Yalom 13 therapeutic factors scale and satisfaction questionnaire for group psychotherapy were asked to them. And at last meeting, total assessment questionnaire was asked to them. Results: We compared the change of therapeutic factors between the former half sessions (1-5) and the later half session(6-10), and the results were as follows ; in the former half, the upper ranks of therapeutic factors were existential factor, universality, catharsis, identi- fication with leader, and identification with members in order. And in the later half, the upper ranks of therapeutic factors were catharsis, existential factor, identification with leader, identi - fication with members, and guidance of members in order. The rank of catharsis and guidance of members went upward and the rank of universality went downward when we compared the ranks in the former half to those in the later half. Altruism and family enactment were the lowest ranked in both half. The satisfaction questionnair for group psychotherapy showed to be helped by participants at the rate of 45.7% in former half, 83.3% in later half. The total assessment questionnaire showed the willingness of re-participation at the rate of 85.7% if future opportunity of group psychotherapy is given for them. Conclusions: The time-limited group psychotherapy for adolescents diagnosed by conduct disorder was very effectively practiced and the participants reported high level of the satisfaction. The outpatient group psychotherapy for adolescents would be expanded and practiced though there are several accompanied problems including the difficulty of structuring, the deficit of motivation, and financial problem.

      • 금강에 인접된 지역에서 발생하는 빨간집모기(Culex pipiens L.)의 살충제 저항성

        이성옥,김정화 忠北大學校 農業科學硏究所 2003 農業科學硏究 Vol.20 No.-

        Resistance monitoring of mosquto, Culex pipiens L collected in the areas(munyi, kongju, puyo and kunsan) near the Kum River(Geumgang) in 1998, was investigated by comparing the resistance ratios to four organophosphorus (chlorpyrifos, dichlorvos, fenthion, fenitrothion), one carbamate (propoxur) and two pyrethroid(permethrin, fenvalerate) insecticides, and by determining the occurrence of esterase activities The sensitivities to insecticides used in this experiment were low but for carbamate The resistance ratio to propoxur was high, 43~75 times In agar gel electrophoresis, activities of esterase bands was high in kunsan, and low in munyi Est-α2βb was shown 79~100% of occurrence in all strains. Rare esterase band was Est-α3βc and it was increased according to downstream of the river.

      • SCOPUSSCIEKCI등재

        경동맥-해면정맥동루 치료에 대한 실험적 연구

        이기찬,임창수,이훈갑,주정화 대한신경외과학회 1980 Journal of Korean neurosurgical society Vol.9 No.1

        A variety of therapeutic maneuvers for the arteriovenous or carotidcavernous fistulas has been tried and mainly discarded as inadequate because of complicated factors such as an anatomical situation of the fistula, an embolus of predetermined size add configuration, and introducing method. The fistulas have been embolized by a variety of materials with no gain of wide acceptance. Ole of the major problems inherent in the procedure is the inability to control the ultimate location of the embolus, which is closely related to predetermined size and shape of the embolus. To get around this difficulty, a piece of the laminaria stalk shappen into a small columnar bar was used as an embolus in this experiment. The laminaria, sea weed used for a slow dilatation of the uterine cervical orifice in gynecological practice, has specific nature of gradual increase in its volume on contact with water or tissue fluids, expanding only in width, radial direction, but not in length. It expanded gradually with maximal increase of 3.3 times the original width by 12 hours of the contact 2nd with increase of more than 80% of its maximal expansion by three to four hours contact. In a seires of experiments, arteriovenous fistulous lesions have been created in albino rats, using a portion of jugular vein implanted on the cervical carotid artery, and it has been tried to occlude the excluded fistulous segment with the help of the laminaria stalk. A stalk of larninaria with diameter of one third of vascular lumen could easily reached to the fistulous point by the arterial pulse and thrust because the stalk was fairly smaller relative to the size of the vessel, and it occluded the lumen of the vessel near totally by a slow expansion of it into as large as the luminal size of the vessel within a couple of hours after lodging in the vessel.

      • 쌍정 경계가 고온 초전도체 Y₁Ba₂Cu₃O단결정의 자기적특성에 미치는 영향

        이보화,박정수,김채옥,김의훈,정규채 漢陽大學校 自然科學硏究所 1997 自然科學論文集 Vol.16 No.-

        일반적으로 쌍정 경계(twin boundary)는 고온초전도체Y₁Ba₂Cu₃O??? 단결정 내에서 핀 고정점(pinning center)로 작용하여 단결정 시료의 자화에 영향을 미칠 것으로 알려져 왔다. 그러나 이에 대한 체계적인 실험적 연구가 수행되지 않고 있다. 본 실험에서는 Y₁Ba₂Cu₃O??? 단결정 시료를 성장시킨 후, 재 후열처리 과정 중에 단축 가압 방법(uniaxial stress method)을 이용하여 단결정 시료를 detwinning 하였다. 편광효과가 관측된 micro-Raman spectra와 X-ray 회절 패턴으로부터 관측된 (001)면의 주 피크의 2Θ 값을 통해서 단결정이 잘 성장되었음을 확인하였다. 그리고, 반자성 차폐 효과, 마이스너 효과 및 자기이력 측정 결과로부터 detwinning시간이 길어져서 쌍정 경계의 비율이 감소할수록 자화폭이 감소함을 관측하였다. 이로부터 자속 고정(flux pinning)이 줄어듦을 알 수 있었다. 그러므로 쌍정 경계가 고온초전도체 Y₁Ba₂Cu₃O??? 단결정의 핀 고정점으로 작용한다는 것을 알 수 있었다. Generally it is suggested that twin boundaries play the major role of the pinning center in high-Tc superconductor Y₁Ba₂Cu₃???? single crystal and influences the magnetization. However, any systematic experiment related with this expectation has not been performed yet. In this experiment, after growing Y₁Ba₂Cu₃??? single crystals, we detwinned them in oxygen atmosphere using uniaxial stress method while annealing them again. It was verified that single crystals had been grown well from micro-Raman spectra that showed the polarization effect and 2Θ values of (001) plain peaks in X-ray diffraction pattern. We observed that values of magnetization of samples decreased from antimagnetic shield effects, Meissner effect and magnetic hysteresis as detwinning time was increased and this result means that flux pinning decreases. As a result we confirmed that twin boundaries act as a pinning center in high-Tc superconductor Y₁Ba₂Cu₃??? single crystal.

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