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이영직,이지신,박종태 大韓法醫學會 1997 대한법의학회지 Vol.21 No.1
Aortic dissection may be considered the result of a discrepancy between the strength of the aortic wall and the intramural pressure. And factors that predispose to aortic dissection may include systemic hypertension, cystic medial necrosis, Marfan's syndrome, atherosclerosis, disease of aortic valve, pregnancy, giant cell arteritis, hyperthyroidism, and blunt chest trauma. A few of aortic dissection may extend retrograde toward the aortic valve and involve the coronary arteries. Coronary artery occlusions due to mural dissection are an uncommon but well documented cause of myocardial infarction. Although rare, extramural hematoma compressing the coronary artery is another cause of myocardial infarction. At autopsy of 43 years old male who had no critical external wound, pericardial sac was distended and contained 400ml of dark red and clotted blood. Examination of the aorta revealed only minute atherosclerosis, intact aortic valve, and patent coronary ostia. 0.5cm sized aortic rupture was noted at the 3.5cm distal to the aortic valve. DeBakey type Ⅱ aortic dissection was found to involve the ascending aorta and brachiocephalic trunk. Three intimal tears were 1.5cm, 8cm, 11.5cm distal to the aortic valve and two false lumens which had intact area between them extended 3.5cm distal to the third intimal tear and proximally in a retrograde fashion to the aortic root. Microscopically, sections of aorta showed relatively intact arrangement of smooth muscle and elastic fibers, except mild vascular ectasia and scattered several foci of the small sized aggregation of foamy histiocytes, and there was no evidence of cystic medial degeneration in aorta. Sections of both coronary arteries did not show mural dissection or atherosclerosis. Sections of right atrium and sinus node showed inflammatory reaction, extensive replacement of myocardium by active fibrous tissue consistent with infarction. There was no histologic evidence of myocardial infarction in the walls of other chambers or septum of the heart. We believe that extramural compression of the artery to sinus node by the dissecting hematoma was the cause of myocardial infarction involving the right atrium and the sinus node.
오제직,최석남,이종길 공주대학교 사범대학 과학교육연구소 1994 과학교육연구 Vol.25 No.1
This paper aims to help the teachers select the textbook and provide them with the basic teaching materials as an ideal model by analyzing the organization (its element and appropriateness), volume amount, experiment matter, and the contents of the highschool chemistry textbooks, which have been revised in accordance with the 5th amended curriculum. The results of the analogy are as follow 1. Organization (its element and appropriateness) : Though having some distincitive characteristics, all the textbooks have almost the same introduction, development, summary, and further study, which are appropriate for the textbook model. 2. The volume amount: All the textbooks have almost the same frame, but s a big difference in such things as the number of pages, of pictures and charts, of Gothic terminology, and relative importance of each chapter. And all the materials such as pictures and photos are black-and-white, which we think are less helpful to the students` study. 3. The experiment matter: There`s a geat difference in the number, kinds, ratio contents and subject of experiment in each chapter. And there are some distinctive characteristics in the type, level, method, and investigative skills of the experiments. 4. The contents : There are considerable differences in the additional and reduced sections. Therefore, which book is selected is very important, and the teachers should not skip any class-work.
李鳳職,李宗奎 충주대 산업과학기술연구소 1998 産業科學論文集 Vol.6 No.-
At present time, tapered screw anchor is commonly used to carry uplift loads. The uplift capacity includes the following factors : the height of overburden above the top helix, the resistance along a cylinder the weight of the soil in the cylinder and the suction force. Especially in sand, the use of anchor system is increasing because of the economical cost and the easy installation. The extensive use of screw anchor system has been limited due to the lack of a rational analysis technique to describe anchor behaviour. Therefore, this research has been placed emphasis on the development of a rational design criterion for the uplift capacity of screw anchor in sand. In order to examine the behaviour characteristics of screw anchor due to pullout, model tests were conducted with respect to various embeddment depth. Based on the experimental study, the following conclusions are drawn. 1.The critical embeddment ratio in sand does occur before and after the embeddment ratio(H/D=5) in loose sand, the embeddment ratio(H/D=6) in medium sand and the embeddment ratio(H/D = 8) in dense sand. 2.The critical embeddment ratio in clay does occur before and after the embeddment ratio H/D = 5. 3.The ultimate uplift capacity in sand is related with the relative density, and the effect of the relative density for the ultimate uplift capacity increases as the embeddment ratio is large.
이영직,박종태 大韓法醫學會 1997 대한법의학회지 Vol.21 No.2
Injury is generally defined as morphological changes due to physical or chemical stress, inflammatory or repair process, or secondary events of the other disease. In the nontraumatic injuries of the lung, direct physical effects to the lung such as contusion or rupture of the lung must be excluded. So, the types of nontraumatic injuries of lung are all pathologic changes of lung except for congenital anomalies; infectious of inflammatory disease, aspiration induced injuries, environmental or occupational lung disease, postoperative pulmonary changes, poison or drug induced toxic injuries, radiation injury, etc ······.
육아종성 심근염에 속발된 급성 미만성 심근염에서 심부전의 병태생리적 기전
박종태,이영직 大韓法醫學會 1997 대한법의학회지 Vol.21 No.1
The heart, 500g in weight, with subacute myocarditis associated with granulomatous myocarditis may be a good model for the study on the pathophysiologic mechanism of cardiac failure. Furthermore, the clinical data of this case is enough to clarify his all clinical course from admission to death due to cardiac failure. So, we analyzed the clinical data, histologic findings, and morphometric pattern of histologically intact myocardial cells and inflammatory reaction to investigate the pathophysiologic mechanism of the cardiac failure. The results were summarized as follows. 1. Clinically, the heart showed cardiac failure of diastolic phase and abnormal conduction system related to sudden cardiac death. However, it might be adapted to the relatively stable vital signs due to pericardial positive pressure by slowly progressed pericardial effusion. 2. The distribution pattern of area of intact myocardial cell area and inflammation reaction showed relatively even spread of inflammatory reaction and extremely decreased area of myocardial cells to about 21% of total heart. So, its contractility might be decreased below to the 21% of the normal cardiac contractility. 3. The mechanism of the cardiac failure in myocarditis may be sudden inflammatory involvement of conduction system and/or extremely decreased myocardial cell volume due to inflammatory destruction. 4. Morphometric analysis may be a useful objective method to grading the severity of old and recent form of myocarditis. From the above results, the cardiac failure of myocarditis is influenced by the adaptability at the inflammatory abnormality of the conduction system, contractility of injured myocardial cells, and compensation activity of pericardial effusion.
배 ‘신고’에 GA3, A3+4+7 및 GA4+7 처리가 과실 형태 및 품질에 미치는 영향
이욱용, 최진호, 천종필, 안영직 배재대학교 자연과학연구소 2017 自然科學論文集 Vol.28 No.1
우리나라에서 많이 사용되고 있는 숙기촉진용 식물생장조절제의 성분 차이에 따른 과실의 형태적 기형 및 품질에 미치는 영향을 조사하였다. 수확기에 과실 무게를 측정한 결과, GA3, GA3+GA4+7 및 GA4+7의 모든 제제에서 과실비대가 유의하게 나타났으며 GA4+7 단용 제제가 가장 높은 비대율을 보였다. 과실의 형태적 이상은 종자생장과 관련이 있는데 GA4+7 제제를 사용한 과실에서 비정상종자발생 비율이 가장 높았다. 저온저장 후 과실의 품질변화에서 GA4+7 제제의 감모율이 가장 높았으며 과육경도의 경우, GA4+7 제제가 GA3+GA4+7 사용 과실에 비해 낮게 나타났다. 이상의 결과를 고려하면 GA4+7의 단용처리구의 경우 과실의 비대효과는 크지만 수확기 이상비대 과실의 출현, 저장 중 경도 감소 등 전반적인 과실품위 유지가 어려울 것으로 판단되므로 지베렐린 이용 시 보다 주의가 필요하다고 판단된다. In this study, we tested the effects of registered or unregistered plant growth regulator gibberellin pastes on fruit shape and internal in 'Niitaka' pears. The treatment of the GA4+7 produced the most enlarged fruit and the fruits treated with unregistered GA paste showed lowest flesh weights among the treatments. Fruit shape of 'Niitaka' pears was closely associated with the formation of normal seeds. And the fruits treated with unregistered GA had the highest proportion of abnormal seed with severe occurrence of abnormal-shaped fruit. We also compared the quality indices after cold storage. The highest fruit weight loss and the lowest flesh firmness values were found in the fruits treated with unregistered GA treatment. Futhermore, the use of unregistered GA products possibly smuggled from other country may occur irregular fruit development through the deficiency of seed development. Consequently, it is recommended that the use of registered GA products such as mixture of GA3 and GA4+7 intensely important to the conformation of high quality fruit production in 'Niitaka' pears.
청장년에서 관찰된 관상동맥의 비죽종성 석회화와 동맥류 : 부검증례보고
이지신,이영직,박종태 大韓法醫學會 1997 대한법의학회지 Vol.21 No.1
Coronary artery calcification(CAC) is found frequently in the atheromatous plaques. CAC is known to have increased frequency above 40 years. CAC without evidence of atherosclerosis in young adults is quite rare, however, CAC combined with aneurysms in young adults have been infrequently reported in patients with a past history of a Kawasaki disease in child. We report an autopsy case showing CAC and aneurysm in the absence of macroscopically identified atherosclerotic lesions in a healthy 23-year-old man. The autopsy examination revealed aneurysmal dilatation of the right coronary artery, which was connected with calcified lesion. A calcified lesion of the left anterior descending coronary artery was aslo noted. Microscopically, aneurysmal wall was non-specific except for hyalinized wall and foci of calcification. A striking histologic finding of calcified mass was ring calcification along the wall of the coronary artery. Antecedent Kawasaki disease in the past was suggestive as other reports.
배우석,이봉직,오세욱,이종규 한국산업안전학회 2003 한국안전학회지 Vol.18 No.1
The failure of rock slopes were influenced by weathering, which causes change in the shear strength. The weathering is also directly related to slaking and swelling characteristics. In the paper, the core of diameter 10㎝ was obtained by digging on rock slope of Kong-ju in Korea and the EDX (Energy Dispersive X-ray spectrometer) analysis was carried out to verified element of chief rock-forming minerals. Uniaxial compression tests, slaking tests, and point load test are performed to study engineering characteristics of conglomerate and red shale. As a results of slaking test, slaking index of conglomerate indicate range of 85.11-99.58 and shale indicate 58.37-99.23.Therefore, it is recognized that the resistance of shale to weathering decreases in shallow depth and it greatly influences the strength of rock. The result of uniaxial compression test and point load test show that the strength of sedimentary such as conglomerate and red shale has an influence on both weathering and saturation.
봉지종류 및 괘대시기가 ‘원황’ 및 ‘화산’ 배 과실의 수확기 품질에 미치는 영향
정억근,이욱용,안영직,이혁재,황용수,천종필 충남대학교 농업과학연구소 2013 농업과학연구 Vol.40 No.2
We tested fruits quality and skin coloration of two pear cultivar ‘Wonhwang’ and ‘Whasan’ produced by bagging with different kinds of paper bags in the Cheonan area, Chungnam Province, Korea. The fruits were bagged at 35, 45, 55 or 65 days after full bloom (DAFB) with 3 kinds of double layer paper bag which consisted of grey color, yellow color and newspaper for outer layer. The great extent of light interruption was observed in grey colored outer paperbag among three kinds of paperbag which showed only 0.46% of lowest light transmittance when compared with 43.7% and 40.0% of yellow paper and newspaper, respectively. The development of skin redness (a*) increased with the delay of bagging time in two pear cultivars. But the fruits treated at 65 DAFB showed uneven coloration and excessive development of redness which represented low fruit external appearance value. Uniform flesh firmness was attained at the fruits bagged with grey outer color paperbag regardless of bagging time, although the fruit quality indices including soluble solids and titratable acidity did not change significantly by using different kind of fruit bags and bagging time in two pear cultivar. Based on our results, it was explained that the grey-colored fruit bag had positive effect on the development of skin coloration without any detrimental effect on fruit quality factors in ‘Wonhwang’ and ‘Whasan’ pears.
Ethephon 및 Aminoethoxyvinylglycine 처리가 ‘원황’ 배 모의 수출 환경에서의 품질 및 생리장해 발생에 미치는 영향
최진호,이욱용,안영직,황용수,천종필 충남대학교 농업과학연구소 2013 농업과학연구 Vol.40 No.2
We investigate the effect of preharvest spray of aminoethoxyvinylglycine (AVG), an inhibitor of ACC synthase activity, on fruit quality of ‘Wonhwang’ pear (Pyrus pyrifolia Nakai). And the effects were compared with ethephon which releasing ethylene to elucidate treatment efficacy of ethylene biosynthesis inhibitor on Asian pears. Chemicals were sprayed on 30 days before harvest with AVG (75 and 150 mg/L) and ethephon (100 mg/L), respectively. Highest flesh firmness during 21 days of shelf-life at 25℃ after 30 days of cold storage was attained in the fruit treated with 150 mg/L AVG (26.5N) when compared with untreated control (16.7N), while the fruits treated with 100 mg/L ethephon completely lost their marketability within 14 days of shelf-life by mass drop of firmness down to 11.6N. Low incidence of physiological disorders including pithiness and core browning were attained at the fruits treated with 150 mg/L AVG when we compared with untreated control. No occurrence of mealiness found in the fruits treated with AVG but ethephon treated fruits showed 36.4% during 14 days of shelf-life. Consequently, AVG spray at the concentration of 150mg/L on Asian pear ‘Wonhwang’ fruit regarded as useful preharvest management approach for keeping quality during marketing period after simulated exportation.