절수에 의한 Mongolian Gerbil 장기중량변화에 관한 분석연구

김무강,이기훈,이강이,송치원,이경열,권효정,박미선,정승혁,이행연,김명철 충남대학교 수의과대학 동물의과학연구소 2000 動物醫科學硏究誌 Vol.8 No.-

In this study, authors measured the each organ weight of the long term water deprived Mongolian gerbil, after then we calculated the mean, standard deviation, variance coefficient of the real measured organ weight and induced the organ weight change quantity, rate of quantity, deviation between measured and theological organ weight, deviation rate, sum of deviation rate, organ weight change rate, rate of organ weight by the mathematical formula. The results obtained as follow 1. The weight of the brains, lung, and testis were abruptly decreased after water deprived until the 5th day, after then slowly decreased until the 20th day. 2. The weight of the heart was decreased gradually from the first day until the 20th day. 3. The weight of the liver was abruptly decreased until the 10th day, after then the more slowly decreased until the 20th day. 4. The weight of the thymus, spleen, kidney, and pancreas were abruptly decreased until the 15th day, after then increased slowly until 20th day but the weight of the kidney was abruptly increased from the 10th day. 5. The organ weight change rate and the rate of the each day organ weight were very diversified.

소아 만성 부비동염에서 단순촬영상과 OMU CT상의 비교

이병돈,박상호,김장묵,이승균,장혁순,강주원,김장욱 순천향의학연구소 1998 Journal of Soonchunhyang Medical Science Vol.4 No.1

Most commonly and widely used diagnostic tool for chronic paranasal sinusitis in children is plain X-ray check not only because of small radiation dose and easy performance, but because of low cost. However ostiomeatal unit computed tomography(OMU CT) was known to be more accurate and recommended recently by many physicians. The author have studied for both OMU CT and plain X-ray of paranasal sinuses and compaird their findings in 90 chidren(180 sides of sinus) aged from 4 to 14 years who suspected having sinusitis. OMU CT was taken after plain X-ray examination (Caldwell's view, water's view, lateral view), and the time interval betweeen these two examination was O to 14 days (average 4.7 days). The following results were obtained. Considering that OMU CT was accurate, the rate of correspondence in diagnosis of sinus pathology between plain X-ray and OMU CT was 48.3% in the ethmoid sinus, 51.1% in the maxillary sinus, 41.9% in the sphenoid sinus, 43.4% in the frontal sinus. If all OMU CT findings had been accurate, the incidence of false positives according to plain X-ray was 25.5% in the ethmoid sinus, 28.3% in the maxillary sinus, 70.8% in the spenoid sinus and 77.8% in the frontal sinus. While, the incidence of false negatives according to plain X-ray was 85.9% in the ethmoid sinus, 70.5% in the maxillary sinus, 50.0% in sphenoid sinus and 37.5% in the frontal sinus. A routine preoperative OMU CT is recommended, which allows a detailed evaluation of pathologic changes and anatomical relations of the paranasal sinuses before surgical interventiaon for the paranasal sinuses. Considering the above facts, diagnosis of pediatric sinusitis only by plain X-ray was inadequate and OMU CT was necessary.

憲法的 視角에서의 環境問題

李康爀 한국외국어대학교 법학연구소 1995 외법논집 Vol.2 No.-

Vitamin E가 Dimethylhydrazine에 의한 장암 발생에 미치는 영향에 대한 연구

이강혁,강대영 忠南大學校 癌共同硏究所 1991 癌共同硏究所 硏究誌 Vol.1991 No.-

주상복합건물의 구조형식에 따른 환경영향 비교연구

이강희,김상범,양재혁 대한건축학회 2004 대한건축학회논문집 Vol.20 No.7

The further building industries are required to include the economic aspects and the environmental aspects simultaneously, where the assessment of these two areas make it possible to select the proper alternative at planning stage. In various assessment ideas in planning process, the estimation of the energy consumption, CO₂ emission and SO_x emission could be effectively utilized to compare and analyze the environmental influence within various alternatives. In this paper, it aimed at providing the unit of energy consumption, CO₂ emission and SO_x emission as an assessment item in according to the structural type of the residential complex building and comparing the environmental impacts at the Steel Reinforced Concrete and Reinforced Concrete. This study found that Steel Reinforced Concrete is better than the RC type building in energy consumption. But SRC is a little unfavorable than the RC type building in CO₂ emission and SO_x emission.

p-n 접합을 이용한 ISFET의 전기적 절연

이강열,강명성,김창수,서화일,권대혁,손병기 경북대학교 센서기술연구소 1992 센서技術學術大會論文集 Vol.3 No.1

忠淸 地域의 타액선 腫瘍에 對한 組織化學的 硏究

李康赫,姜大榮 충남대학교 의과대학 지역사회의학연구소 1984 충남의대잡지 Vol.11 No.1

For studies on the salivary gland tumors in Chungcheong areas, the specimens were collected at the department of pathology, Chungnam National University School of Medicine from January 1978 to December 1982, and analyzed to classify an assortment of salivary gland tumors on clinical or histological basis and performed histochemical studies using various special stains such as PAS, PAS after diastase digestion, Alucian blue, Toluidine blue and Masson trichrome stains. The results were as follows: 1. Out of 73 cases, 60 cases(82.3%) occurred at the major salivary glands, and 60 cases (82.3%) were benign. 2. Of these major salivary gland tumors 10 cases(16.7%) were malignant while 3 cases (23.1%) of minor salivary glands were malignant. 3. Mucoid material found in the ductal lumen of pleomorphic adenoma, mucoepidermoid tumor and adenoid cystic carcinoma was PAS positive and also diastase resistant PAS positive. Material in the pseudocystic spaces of adenoid cystic carcinoma was strongly alucian blue positive, toluidine blue positive, and metachromatic. 4. Mucoid material in the stromal portions of pleomorphic adenoma, adenoid cystic carcino and mucoepidermoid tumor was alucian blue positive, toluidine blue positive and metachromatic. 5. Mucoid material in the glandular or ductal lumens of Warthin's tumor was PAS positive and not metachromatic with toluidine blue. 6. Results of the present study indicated that pleomorphic adenoma and adenoid cystic carcinoma were thought to originated from myoepithelial cells. The mucoepidermoid tumor were thought to originate from large secretory ducts, and the acing cell tumors were derived from acinar cells.

광조형 시스템의 정밀조형을 위한 지지대 자동 생성 시스템 개발

강혁준,이형국,김효찬 동의공업대학 2000 論文集 Vol.26 No.1

Support structures are used to support a component during building process and must be removed once the building is complete. For precise building this paper specified types of support structures by means of geometry characteristics. They are point, line and area. And found a new algorithm for detecting geometries which need support structures. For easy of removing support structure teeth profile generation and interferences avoidance algorithm was studied.

Vitamin E가 Dimethylhydrazine에 의한 장암 발생에 미치는 영향에 대한 연구

이강혁,강대영 忠南大學校 癌共同硏究所 1991 癌共同硏究所 硏究誌 Vol.1 No.1

In an attempt to elucidate the effects of Vitamin E on intestinal tumorigenesis by 1, 2-dimethylhydrazine (DMH), the present study was undertaken in male Sprague-Dawley rats. Carcinogenesis was induced in male Sprague-Dawley rats with DMH 20 mg/kg or 40 mg/kg administered subcutaneously at weekly intervals for 24 doses. Vitamin E (tocopheryl acetate) was given orally to one group of DMH 20 mg treated rats. All animals were sacrified when moribund or at 28th week. All organs were examined macroscopically and fixed in 10% buffered formalin. Histologic studies were routinely done on the liver, spleen, kidney, bladder, thyroid gland, heart, lungs, pancreas, duodenum, jejunum, ileum, cecum, colon, rectum, and regional nodes. The results were as follows: 1. Of the DMH induced bowel neoplasms, all (100%) developed colonic tumors, and some developed rectal, cecal and small inestinal tumors. 2. Histologically, the tumors were classifed as polypoid adenoma, and adenocarcinoma, the latter revealed some evidence of mucin secretion. 3. The total number of tumors in the DMH 40 mg treated group was higher than that of the DMH 20 mg treated group. This difference was highly significant (p<0.0065). 4. The degree of tumor invasion in the DMH 20 mg treated group was relatively confined to the submucosa, whereas that of the 40 mg DMH treated group was confined to the serosa, except for wide dissemination in 3 rats. 5. The total number of tumors or the degree of tumor invasion between the DMH 20 mg treated group and the DMH 20 mg+vitamin E treated group was not significant (p>0.8). In summary, the results obtained by the present study support the following theory; The metabolic material (MAM) of DMH is delivered to colon via the blood stream. MAM then breaks down either the colon lumen or colon mucosal cells to form highly reactive methyl diazonium and methyl carbonium ions, which are believed to be the ultimate carcinogen moieties. The present study is in contrast with the reported inhibitory effect of Vitamin E on colon carcinogenesis.

질소이온주입에 의한 알루미늄의 표면개질특성

강혁진(Hyuk-Jin Kangㅠ),안성훈(Sung-Hoon Ahn),이재상(Jae-Sang Lee),김경균(Kyung-Gun Kim) 대한기계학회 2005 대한기계학회 춘추학술대회 Vol.2005 No.5

The research on surface modification technology has been advanced to improve the properties of engineering materials. Ion implantation is a novel surface modification technology to enhance the mechanical, chemical and electrical properties of substrate’s surface using accelerated ions. In this research, nitrogen ions were implanted into aluminum substrates which would be used for mold of rubber materials. The composition of nitrogen ion implanted aluminum alloy and nitrogen ion distribution profile were analyzed by Auger Electron Spectroscopy (AES). To analyze the modified surface, properties such as hardness, friction coefficient, wear resistance, contact angle, and surface roughness were measured. Hardness of ion implanted specimens was higher than that of untreated specimens. Friction coefficient was reduced, and wear resistance was improved. From the experimental results, it can be expected that ion implantation of nitrogen enhances the surface properties of aluminum mold.