P^(147)_m의 Beta 붕괴의 의한 K-shell Shake off Ion化 확률

崔勝平,李相烈 조선대학교 원자력연구소 1982 原子力硏究 Vol.2 No.-

The probability of K-shell ionization in the beta decay of P_m^147 have been measured to be (0.98±0.08) X 10^4. The experimental result was compared with the values obtained from the previous measurements and the a model based on vacany creation mechanisms of shake off. A new theoretical approach taking account of the final correlation is desired to understand the phenomenon.

종격동 종양의 임상적 고찰

임승평 충남대학교 의과대학 지역사회의학연구소 1990 충남의대잡지 Vol.17 No.2

A clinical analysis was performed on 55 cases of primary mediastinal tumors proved histopathologically, either resection or biopsy, from August 1977 to November 1990, at the Department of Thoracic and Cardiovascular Surgery, Chung-nam National University Hospital. Among 55 cases, mlae was 24 and female was 31 and ages of patients were ranged between six months and 67 years old with average 31.1 years. The primary tumors included neurogenic tumors (41.8%), teratomas(21.8%), thymomas(14.5%), benign cysts(10.9%) and a miscellaneous group. The posterior mediastinum was the most commonly involved site of a primary mediastinal tumor (49.1%), followed by the anterosuperior mediastinum(40.0%) and the middle mediastinum(10.9%). The most frequent histopathologic types of the primary mediastinal tumor were teratoma and thymoma in the anterosuperior mediastinum, benign cyst and teratoma in the middle mediastinum and neurogenic tumor in the posterior mediastinum. Malignant neoplasms were present in 11 patients(20.0%). Symptoms were present in 63.5% of the patients and included chest pain or discomfort(23.6%), dyspnea(14.6%), cough(7.3%), neck mass, ferquent URI and generalized weakness. 30.1% of the lesions in symptomatic patients was malignant. 49 cases of the patients(89.1%) were treated with complete resection, two cases with partial resection and four cases were biopsied only. Among 11 patients with malignant lesions, five patients received postoperative chemotherapy, two patients received irradiation, two patients received chemotherapy and irradiation and two patients refused further postoperative adjuvant therapy. Postoperative complications were bleeding, Horner's syndrome, pleural effusion and sympathetic nerve injury in five patients and there have been no surgical mortality.

殺蟲性 O,O-Diethylphenylphosphate 誘導體의 形態와 反應性에 關한 分子軌道論的 硏究

朴勝熙,成洛道,明平根,全容求,李天培 충남대학교 약학대학 의약품개발연구소 1985 藥學論文集 Vol.1 No.-

Molecular orbital theoretical study on the stability of conformations and chemical reactivity of 0,0-diethyphenylphosphate derivatives were carried out by EHT and CNDO/2 molecular orbital calculation method. The results shown that the dipole moment(μ) and total energies of the θ=90° conformer were μ=3.185D & E_t=-162.6479(au) and also that of the θ=0° conformer were μ=5.596D & E_t=-162.4013(au), respectively. Therefore, the values of μ & E_t of the θ=90° conformer were much smaller than that of the θ=0° conformer. The form with angle of rotation θ=90° of phenyl ring was shown to be most stable and this was interpreted in terms of electrostatic and steric effect. O,O-diethylphenylphosphate derivatives are predicted to increase both charge and orbital controlled SN_2 reactivity of the electron withdrawing substituent reduces the HOMO & LUMO energy, while the electron withdrawing substituent due to increase in positive charge of phosphorus atom of phosphate molecule.

심방중격결손증의 외과적 치료

임승평 충남대학교 의과대학 지역사회의학연구소 1986 충남의대잡지 Vol.13 No.1

Twenty five patients with atrial septal defect operated on from May, 1983 to January, 1986, at the Department of Thoracic and Cardiovascular Surgery, Chungnam National University Hospital, were analysed retrospectively. Among the 25 patients of atrial septal defect, 7 were male and 18 were female. Their ages ranged from 4.6 years to 52.5 years old with the mean of 14.5 years. The main clinical symptoms on admission were exertional dyspnea (84%), frequent respiratory infection (76%), palpitation (52%), easy fatigability (24%). Electrocardiographic findings were as follows: Regular sinus rhythm (100%), RVH (56%), RBBB (24%) and first degree A-V block (4%). Hemodynamic study was performed in all cases and mean pulmonary systolic arterial pressure was 36.1±12.6mmHg. and mean Qp/Qs was 2.3±0.6. All 25 patients were operated on under direct vision using extracorporeal circulation. 21 cases were secundum type defect and a single hole was found in 20 cases. 10 associated cardiovascular anomalies were found 8 patients.: ventricular septal defect in 3, patent ductus arteriosus in 1, partial anomalous pulmonary venous drainage in 2, mitral regurgitation in 1, tricuspid regurgitation in 1, anomalous left atrial septation in 1 and valvular pulmonary stenosis in 1. The defects closed directly in 21 cases and with patches in 4. Postoperative complications were wound infection 2, arrhythmia 2, bleeding 1, intracardiac patch detachment 1, pneumothorax 1, urethral injury 1 and hoarseness 1. But there was no operative mortality,

大田市圈內의 河川 汚染度(1981)

明平根,成洛道,朴勝熙,鄭憲俊,吳仁敎 순천향대학교 1982 논문집 Vol.5 No.4

An investigation of the water quality for the streams of Daejon area in Chung-nam province, korea, was conducted from January to December 1981. By this analysis of water quality for the streams of Daejon area, annual mean values of BOD: 49.3㎎/l, COD: 33.4㎎/l, DO: 7.5㎎/l, SS: 39.1㎎/l were determined respectively and those values of parameters were comparatively high. The increasing order of the water pollution for the streams of Daejon area was as follows; confluence place Daewha-Dang (D)> Yudeung Stream (B)> Daejon Stream (A)> Gab Stream (C). Therefore, it suggest that the water pollution of the streams of Daejon area have greatly influenced upon the water quality of Kum River in Chungnam and Jon-buk province.

화학적 침전법으로 제조된 BaTiO_3 소결온도에 대한 유전특성

김승이,최승평,정차익 조선대학교 기초과학연구소 1997 自然科學硏究 Vol.20 No.1

Highly pure barium titanate powders have been obtained by the pyrolysis of barium titanyl oxalate. Barium titanate powders under different calcination condition were cold-pressed into discs 10mm and 1mm thick using a stainless steel die. A fabrication pressure of 24000 p.s.i.(16.53 Nmm^-2) was maintained in all formings. The compacts were sintered in air at 850, and 1050℃ for 2 hr in a silicon tube furnace with SiC heating elements. Using extrapolation method of X-ray diffraction pattern, it was found the samples have a tetragonal structure whose lattice parameters a_0 and c_0 were 3.9962 and 4.0138Å respectively. The samples sintered at 850, 950 and 1050℃ showed dielectric reponse and Curie peak characteristics are similar to each of them over the temperature range from room temperature to 350℃, and have a flattened permittivity below Curie temperature.

승모판막치환술의 임상적고찰

임승평 충남대학교 의과대학 지역사회의학연구소 1995 충남의대잡지 Vol.22 No.2

A clinical analysis was performed on 177 patients receiving 185 mitral valve replacements during the period of 11 years from May 1983 to April 1994 at the Department of Thoracic and Cardiovascular Surgery, Chungnam National University Hospital. The results of clinical follow-up until the end of September 1995 were as follows : 1. Sixty-six patients were male and one hundred and eleven patients were female and the age of patients varied widely from 12 to 66 years with average of 39.7 years. 2. Dyspnea on exertion and palpitation were the major preoperative symptoms. 3. On past-medical history, there were rheumatic fever (9.6%), thromboembolism (9.6%), previous mitral valve replacement (7.2%) and mitral valvuloplasty (3.3%). 4. Initial valvular lesions were pure stenosis (33.9%), stenosis dominant (23.7%), pure regurgitation (14.7%), regurgitation dominant (11.3%) and combined cases (16.9%). 5. There were 33 cases of tricuspid lesions necessitating TAP (17.8%) and 36 cases of thrombi in left atrium (19.5%). 6. Used valves were Ionescu-Shiley (21.6%), Intact (2.7%), Saint-Jude Medical (5.4%), Bjork-Shiley (26.0%), and Carbomedics (44.3%) and their sizes were 27mm (15.8%), 29mm (29.7%), 31mm (50.2%) and 33mm (4.3%). 7. Early mortality was 11.9% (22 cases) and low cardiac output syndrome (6 cases) and ventricular arrhythmias (6 cases) were the most common causes. Reoperation, prolonged bypass time and aortic cross-clamping time, preoperative functional class, status of myocardial performance and operative technics were the risk factors. 8. One hundred fifty cases were followed up with total 881.5 patient-year (mean 5.9 years) and there were 14 cases of late mortality (10 cardiac, 3 non-cardiac, 1 unknown deaths.) 9. The most common cause of late death was progressive congestive heart failure. 10. Actuarial survival rate at 5 years was 94.67% and at 10 years was 83.95%. 11. Actuarial freedom rate from complications at 5 years was 94.52% and at 10 years was 82.5%.

잎들깨 수량과 단백질체 발현에 미치는 UV-B의 영향

홍성창,황선웅,장안철,신평균,장병춘,이철원 한국환경농학회 2006 한국환경농학회지 Vol.25 No.1

금속-유리가 피복된 광섬유를 이용한 자기장 센서 연구

최승평,홍광준 조선대학교 기초과학연구소 1999 自然科學硏究 Vol.22 No.1

A fiber optic magnetic sensor(FOMS) was made of single-mode optical fiber deposited Metglas cast alloy by using magneton sputtering. The matallic-glass-coated optical fibers were used as magnetic field sensing parts in one arm of a Mach-Zehnder interferometer. Inside a chamber containing Helmholtz coils which produced both a dc field and an ac field the sensing part was placed. the phase shift were measured as a function of the magnitude of the dc field and the frequency of the ac field. The phase shift amplitude to the magnitude of the ac field was measured to be 0.91rad/Oe, and a resonance enhancement factor of Q=95 was exhibited at the 245Hz frequency.

개심술에 의한 승모판막교련절개술의 임상적 고찰

임승평 충남대학교 의과대학 지역사회의학연구소 1988 충남의대잡지 Vol.15 No.2

A clinical analysis was performed on 30 cases of mitral stenosis received open mitral commissurotomy during the period of 5 years from April 1983 to April 1988 at the Department of Thoracic and Cardiovascular Surgery, Chungnam National University Hospital. Among 30 cases, male was 8 and female was 22 and ages ranged between 17.3 years and 53.2 years old with the average of 37.5 years. The major clinical symptoms on admssion were dyspnea on exertion, palpitation, hemoptysis and chest pain in order, with the average duration of 7.3 years. The preoperative electro cardio graphic findings were RVH(21 cases), LAE(17 cases) and atrial fibrillation (10 cases). The cardiac catherization were performed in 27 cases and mean systolic pulmonary arterial pressure was 56.52+26.43mmHg and mean pulmonary artery wedge pressure was 26.29±10.44 mmHg. Intraoperatively, there were 5 cases of left atrial thrombosis, but there was no postoperative complication. Overall, functional results were excellent after surgery, with 29 cases returning to New York Heart Association functional class I or Ⅱ initially.