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송광철,최병연,김성호,배장호,김오룡,조수호,Song, Kwang Chul,Choi, Byung Yon,Kim, Seong Ho,Bae, Jang Ho,Kim, Oh Lyong,Cho, Soo Ho 대한신경외과학회 2000 Journal of Korean neurosurgical society Vol.29 No.7
Objective : The purpose of our experimental study was to analysis the advantages and disadvantages in the reversible and irreversible cerebral ischemic models with rats by staining with Neutral Red(NR) solusion, 2% 2,3,5-triphenyltetrazolium chloride(TTC) and Hematoxylin & Eosin(H & E). Methods : We have measured the range of cerebral infarction in the rat to get a suitable ischemic model along the object of study with and without craniectomy. With craniectomy, 9 rats were sacrificed for irreversible cerebral ischemic model by means of ligation at proximal(group I) and distal(group II), and coagulation at proximal(group III) middle cerebral artery. Also, 6 rats were sacrificed for irreversible(group IV) and reversible(group V) cerebral ischemic model using nylon thread without craniectomy. The sizes of infarction were measured by staining the coronal sections of the brain with NR solusion, TTC and H & E. Results : There are no difference of physiological parameters comparing the each group. Cerebral infarction was not observed in group II, but it's volume was largest in group IV. Disadvantages of craniectomy group(I, II, III) are the long duration of operation and cortical damage by procedure. It's advantage is confirmation of the middle cerebral artery occlusion and cessation of blood flow through the operative microscope. In case of ischemic models using nylon thread (group IV, V), it is hard to identify the interruption or recirculation of blood flow through the middle cerebral artery, but the advantage is the simplicity of operative technique which reduces the operation time and minimizes the cerebral damage due to craniectomy. Therefore, it seems important to set up the reversible and irreversible ischemic models by carefully considering advantages and disadvantages listed above. Conclusion : TTC staining seems to be effective since it reflects the histological damage sufficiently and quickly. It is hoped that researches focused on ischemic penumbra, which became popular recently, will be further carried on with use of NR staining, optical microscope and electron microscope.
백서의 가역성 뇌허혈 모형에서 저체온의 효과와 적용시기
최병연,정병우,송광철,박진한,김성호,배장호,김오룡,조수호,김승래,Choi, Byung-Yon,Jung, Byung-Woo,Song, Kwang-Chul,Park, Jin-Han,Kim, Seong-Ho,Bae, Jang-Ho,Kim, Oh-Lyong,Cho, Soo-Ho,Kim, Seung-Lae 대한신경외과학회 2000 Journal of Korean neurosurgical society Vol.29 No.2
Objective : We studied to clarify the effective time zone of mild hypothermic neural protection during ischemia and/or reperfusion after middle cerebral artery occlusion. Methods : In a reversible cerebral infarct model which maintained reperfusion of blood flow after middle cerebral artery occlusion for two hours, the size of cerebral infarction, cerebral edema and the extent of neurological deficit were observed and analyzed for comparison between the control and the experimental groups under hypothermia($33.5^{\circ}C$). The temporalis muscle temperature was reduced to $33.5^{\circ}C$ by surface cooling for two hours during middle cerebral artery occlusion for study group I. The following groups applied hypothermia for two-hour periods after reperfusion : group II(0-2 hours), group III(2-4 hours), and group IV(4-6 hours). They were rewarmed to $36.5^{\circ}C$ until sacrified at 2, 4, 6, 12, and 24 hours after reperfusion. Control group was maintained at normothermia without hypothermia. Results : In the experimental groups with hypothermia, the average value of the size of cerebral infarction($mean{\pm}SD$) was $1.97{\pm}1.65%$, which was a remarkable reduction over that of the control, $4.93{\pm}3.79%$. In the control, a progressive increase was shown in the size of infarction from point of reperfusion to 6 hours after reperfusion without further changes in size afterward. Intra-ischemic hypothermia(group I) prevented ischemic injury but did not prevent reperfusion injury. Group II examplified the most neural protective effect in comparison to the control group and group IV(p<0.05). The cortex was more vulnerable to reperfusion injury than the subcortex. Mild hypothermia showed more neural protective effects on the cortex than subcortex. Conclusion : The most appropriate time zone for application of mild hypothermia was defined to be within four hours following reperfusion.
미적요소에 기초한 미술 감상 활동이 유아의 미술 활동 능력에 미치는 영향
김정아 (Jung A Kim),송광철(Kwang Chul Song) 한국전시산업융합연구원 2011 한국과학예술융합학회 Vol.8 No.-
본 연구는 미적요소에 기초한 미술 감상 활동이 유아의 미술 활동 능력에 어떠한 영향을 미치는지를 알아보고자 했다. 연구 결과 첫째, 미적요소에 기초한 미술 감상 활동은 유아의 미술표현과정을 향상시켰다. 유아들이 자신의 경험을 즐거운 마음으로 표현하게하고 완성된 작품을 소중하게 다루는데 효과가 있었다. 둘째, 미적요소에 기초한 미술 감상 활동은 유아의 미술표현능력을 향상시켰다. 유아가 주제를 창의적으로 표현하고 다양한 재료와 색을 활용하여 생동감 있게 표현하는데 효과가 있었다. 셋째, 미적요소에 기초한 미술 감상 활동은 유아의 미술 감상 능력을 향상시켰다. 유아가 미술작품에 대한 자신의 느낌과 생각을 설명하는 감상태도에 효과가 있었다. The purpose of this study was to test the effect of art appreciation based on the improvement of young children’s art activities. The results of this study were summarized as follows. 1. Art appreciation based on aesthetic elements improved the children’s artistic process. The children enjoyed to participate in their art activities and retained ownership of their artworks when they chose their own subject matter. 2. Art appreciation based on aesthetic elements improved the children’s artistic expression abilities. The children expressed with individual ideas and feelings through the use of various art media. 3. Art appreciation based on aesthetic elements improved the children’s artistic appreciation. When children appreciated artsorks, they could express their thinking of artworks in their own way.
아르곤 레이저 형광법을 이용한 우식활성검사와 수종의 구강환경 검사와의 상관관계에 관한 연구
송광철,이상호 朝鮮大學校 口腔生物學硏究所 1998 Oral Biology Research (Oral Biol Res) Vol.22 No.2
The purpose of this study was to develop a practical caries activity test using laser fluorescence. The subjects of study were 30 children of 7-9 years old. Fluorescence from initial carious lesion of teeth illuminated by an argon laser(488㎜) was observed and photographed with barrier filter. For evaluation of accuracy and propriety of this method for cacries activity test, teeth with initial caries lesion on buccal or labial surface of children was examed with visual inspection and laser fluorescence. Visual examination for the dDfFtT and the Cariescreen^TM test were also done. The results from the present study can be summarized as follows: 1. Initial enamel caries of smooth surface was observed as pale white spot and undefined outline under visual inspection with ordinary light. Whereas, lesion was clearly visible as dark spot in laser fluorescence. 2. Laser fluorescence test could differenciate initial caries lesions more effective than visiual inspection. 3. There was highest correlation(γ=0.73) between laser fluorescent test and Cariescreen^TM test. And also apparent correlation(γ=0.66) exists between laser fluorescent test and caries experience measured by dDfFtT. In regard to above results, laser fluorescent test considered to be acurate and reliable method for determining caries activity because of it's close relationship with caries susceptibility test and caries experience measurements. And it was also considered to be practical because it would be simple, inexpensive, and time saving method.