Mesh형 내부전극을 사용한 2중 원통형 오존발생기의 온도 의존특성

전병준,이상근,송현직,박원주,이광식 영남대학교 공업기술연구소 1999 工業技術硏究所論文集 Vol.27 No.1

Nowadays, environment pollution caused by development of industrial society becomes a serious social problem. So, ozonized gas is suggested as a counter plan against the problem. In this paper, a double cylindrical type ozonizer has been designed and manufactured to improve ozone yield by cooling external electrode. The ozonizer equipped with three electrodes(central, internal and external electrodes) and two gaps. Discharge and ozone characteristics are described in this paper by varying flow rate( Q ) of oxygen suppling gas, temperature of cooling gas and supplied voltage.

임플란트 식립을 위한 상악동 점막 거상술의 결과

천상득,정보연,이승은,윤홍식,진병로 영남대학교 의과대학 2003 Yeungnam University Journal of Medicine Vol.20 No.2

Background: Although dental implantation has become widespread and acceptable treatment for dental prosthodontics, maxillary posterior jaw region is often complicated by the pneumatization of the maxillary sinus and physiological resorption of the alveolar bone. When this occurs, the residual bone between the floor of the sinus and the crestal ridge is inadequate for the placement of implants. The sinus elevation procedure provides a way to increase the amount of available bone and to allow the placement of longer implants. Materials & methods: We studied 11 patients requiring the implant placements and the maxillary sinus elevation simultaneously from 1996 to 2003 in our clinic. Nine patients were males and two patients were females, aged from 39 to 72(mean=51.6). Four patients had medical compromised states; angina pectoris, diabetes, hypertension, hepatitis. Patients didn't show any pathologic findings clinically or radiographically. We studied the success and survival rate of implants, factors increasing the osseointegrating capacity of implants. Results: The success rate of osseointegration of implants was 93%. At least 6 months after loading on implants, the survival rate of implants was 78.5%. Autogenous bone graft and adequate residual bone height(>6mm) increased survival rate of implants. Conclusion: Successful implant placement with maxillary sinus elevation mainly depends on sufficient residual bone height, healthy maxillary sinus, autogenous bone graft.

포와송 방정식의 해

崔性春,崔玉植 嶺南大學校 基礎科學硏究所 1995 基礎科學硏究 Vol.15 No.-

It is shown that the solution of the simple electrostatic potential 1/r has the first and second derivatives and satisfies Poisson's equation.

휘발성 미량유기오염물질의 광분해에 관한 연구

이춘식,최장승,안종수,박현건,성낙창,박승조 동아대학교 환경문제연구소 1998 硏究報告 Vol.21 No.1

This study was carried out photolysis of Trace Volitile Organic Pollutants(BTEX) in the water. The experiment results were summarized as follows : 1. Benzene of removal efficiency were revealed 90% on illumination time of 20minute for bezene concentration range 0.01ppm-0.06ppm by 450W medium pressure mecury lamp of photon energy photolysis reaction, and were revealed 93% phomoxidaton on illumination time 30minute in 0.lppm of reactant benzene. Toluene of removal efficiency were revealed each 97.7%, 98.3%. 97.7%, 87.396 on illumination time of 20minute for toluene each of concentration 0.0lppm, 0.03ppm, 0.06ppm. 0.1ppm by 450W low pressure mecury lamp of photon energy photolysis reaction, and reactant toluene was disappeared on illumination time 30minute. 2. Ethylbenzene of removal efficiency get the better photolysis on the treatment contrast ethylbenzene with benzene and photolysis removal efficiency was above 90% in ethylbenzene concentration range 0.0lppm-0.lppm on illumination time l0minute. 3. Photolysis removal efficiency of m, p-Xylene were researched better result 93% on the about l0minute of illumination time m, p-Xylene concentration range 0.01ppm-0.06ppm, removal efficiency was 97% in higher concentration of 0.2ppm and illumination time 20minute. 4. Photolysis removal efficiency of o-Xylene were researched better result 95% on the about l0minute of illumination time m, p-Xylene concentration range 0.0lppm-0.lppm, and reactant o-Xylene was disappeared on illumination time about 20minute by 450W m d u m pressure mecury lamp.

자궁경부종양에서 Cathepsin-D 표현의 의의

이춘희,김세진,전상식,이택후,조영래,채종민 경북대학교 병원 1997 경북대학교병원의학연구소논문집 Vol.1 No.1

Various clinical and histopathologic characteristics are currently used to obtain prognostic information about cervical carcinoma, but they do not predict the outcome for any individual patients. Thus, there is a need to identify additional tumor characteristics that are able to predict more accurately the outcome for an individual patient with cervical cancer. In this study, we explored the relationship between cathepsin-D expression and progression of the cervical neoplasia, the correlation between response to neoadjuvant chemotherapy and cathepsin-D expression, and we investigated if tumor cell cathepsin-D expression could serve as a prognostic factor in cervical carcinoma. Tumor tissues were obtained from 14 patients with cervical intraepithelial neoplasia and 52 patients with squamous cell carcinoma of the cervix. Cathepsin-S expression was identified by immunohistochemical methods using monoclonal antibody cathepsin-D (BioGene). Positive cathepsin-D immunoreaction in greater than 30% of carcinoma cells was scored as high expression. High cathepsin-D expression was seen in 15 of 52 invasive cancer but was absent in cervical intraepithelial neoplasia. It was shown that cathepsin-D expression was independent of the rumor grade, tumor size, lymph node involvement, depth of invasion, parametrial invasion, and response to chemotherapy. In disease free survival analysis by log-rank test, cathepsin-D expression was not significantly associated with survival. These results show that cathepsin-D expression is not a clinically useful adjunct to assessment of prognosis in invasive squamous cell carcinoma of the cervix.

Aldrin의 광증감 분해에 관한 연구

이춘식,김영희,김성우,이동근 경상대학교 환경보전연구소 1999 環境保全硏究所報 Vol.7 No.-

Sensitized photooxidation of aldrin was carried out using anions as sensitizers. Persulfate, nitrate ions were proved to be effective to enhance the photooxidation of aldrin. Nitrite ion was inhibited to the photooxidation of aldrin. In the case of sulfate and chloride ion, however, no significant enhancement effect was observed. The sensitizing effect increased with increasing persulfate and nitrate concentration. Nitrite ion was oxidated to nitrate by photolysis reaction. The sensitized effect decreased with increasing nitrite concentration.

두부 외상 환자의 고혈당과 예후와의 상관관계

현석천,이종안,박준석,박상문,김갑득,장인성,김승열,송화식 대한응급의학회 1996 대한응급의학회지 Vol.7 No.2

Severe head injury is associated with a stress response that includes hyperglycemia, which has been shown to worse outcome during cerebral ischemia. To better define the relationship between head injury and hyperglycemia, admission glucose level were analyzed in 150 head injured patients from January 1995 to December 1995. Our retrospective study demonstrated a higher glucose level in patients with low Glasgow Coma Scale(GCS) score, especially at 3-5 GCS score, compared to those with high GCS scores. Also a higher glucose level was noted in patients with vegetative state and dead than in those with good recovery and moderate disability. Hyperglycemia(serum glucose level≥200mg%) was associated with decreased level of consciousness and a poor outcome. We conclude that admission hyperglycemia is a significant indicator of severity of injury(p<0.001), but not significant predictor outcome from head injury. After controlling for the influence of the GCS score, glucose levels do not have an independent effect on outcome.

소아 확장성 심근증의 임상적 고찰

이성환,김준식,박근수,김명성,권태찬,김천수,이상락 啓明大學校 醫科大學 1996 계명의대학술지 Vol.15 No.1

A Clinical assessment of the 25 patients with dilated cardiomyopathy who were admitted to the Department of Pediatrics, Keimyung University Dong San Hospital from January, 1982 to June, 1993 was performed. The result were as follows: 1) Among 25 patients with dilated cardiomyopathy. 8(32%) were younger than 1 year of age at the time of admission. 2) Adriamycin toxicity was the only encountered etiologic factor in 1 patient. 3) On admission, hepatomegaly and tachycardia were noted in almost all patients. 4) The Chest X-rays showed cardiomegalies in all 25 patients, pulmonary vein congestions in 15(60%) and pleural effusion in 2(8%). 5) The electrocardiography showed left ventricular hypertrophy in 72% and supraventricular tachycardia in 32%. 6) The echocardiographic examination showed left ventricular dilatations in all patients and left atrial dilatations in 20(80%). 7) Of 18 patients who had followed mean period of 2.9 years, 10 patients died within 9 months after the diagnosis.

工業團地內 새마을運動 共同推進方案에 관한 硏究

金千鎰,裵源達,林德相,張晩植 효성여자대학교 새마을연구소 1989 새마을硏究論文集 Vol.9 No.-

5-Fluorouracil로 유발된 백서후지의 선천성 기형

김천호,박성국,김선,박경란,김원식 충남대학교 의과대학 지역사회의학연구소 1996 충남의대잡지 Vol.23 No.1

To study the teratogenic mechanism of 5-fluorouracil on the developing rat hindlimbs and to reveal the congenital anomalies induced by 5-FU, 25mg/kg of 5-fluorouracil was injected intramuscularly into S-D rats on gestational day 10.5. The rats were sacrificed under ether anesthesia on gestational day 11.5, 12.5, 13.5, 14.5, 15.5, 16.5 and 17.5. The whole uterine horns were removed for observing the congenital anomalies of the hindlimbs with stereoscope. Some fetuses were fixed by the neutral buffered formalin solution for LM exmination and some hindlimbs were fixed by 2.5% glutaraldehyde solution for TEM and SEM examination. After routine processing, LM and TEM examination were performed. The results were as follows ; 1. The mean survival rate of 5-fluorouracil-treated rat fetuses was decreased sign ificantly(p<0.01) compared with that of the control group. 2. The mean body weight of the 5-fluorouracil-treated rat fetuses on gestaticnal day 17.5 was significantly lower (p<0.01) than that of the control group. 3. The congenital anomalies on the hindlimbs of the rat fetuses were 4 digit, short digit, 3 digit, and 2 digit anomalies in that order. These anomalies occured moreon the right limb about 2.6 times than on the left limb. 4. On LM and TEM examination, 5-fluorouracil injured the apical ectodermal ridge epithelial cells and mesenchymal cells of hindlimb bud initially, but, this recovered around gestational day 14.5. According to the above results, 5-fluorouracil-induced congenital anomalies of the hindlimbs of rat fetuses may be caused by injury to the apical ectodermal ridge epithelial cells of limb bud. Apical ectodermal ridge epithelial cells that have recovered from injury around gestational day 14.5 may elicit changed information of abnormal patterning and differentiation into the underlying mesenchymal cells in progress zone, and the various digital anomalies, such as oligodactyly and short digit anomalies will be resulted.