水質汚染 指標種으로서의 淡水藻類에 關한 硏究

朴鐘聲,崔信錫,申昌男,琴鍾和 忠南大學校 環境問題硏究所 1984 環境硏究 Vol.2 No.2

In order to determine the fresh- water algae as indicators of water pollution, an attempt was conducted from February 28 to October 20, 1984 at the six stations of the Geum River. 1. The St. 1 and 2 showed farirly good water quality. The value of BOD at St. 3 was 6.4 ppm exceeding the permitted level of pollution (5 ppm). Those values at St. 4, 5, and 6 were 2.0- 5.0ppm below the permitted level. 2. DO, BOD, COD, C1-,and NH₃-N contents were significantly different from one another of the surveyed stations of the Geum River. 3. The algae collected at all surveyed stations were of 52 genera 119 species. The relative abundance of Nostoc planctonicum and Oscillatoria limosa were very high at St. 3 where the level of pollution was relatively high and at St. 6 where the water quality was affected by the sea-water under the tidal condition. 4. In the Geum River, Gomphonema olivaceum could be regarded as the most important indicator of the water pollution. The permitted levels of BOD, COD, C1-, and NH₃-N contents for its survival are 5.0, 7.9, 39.1, and 4.1 ppm, respectively.

몇가지 植物中의 Vesicular-Arbuscular Mycorrhizae에 關하여(第三報)

金鐘均,具順和 공주대학교 사범대학 과학교육연구소 1986 과학교육연구 Vol.18 No.1

Mt. Kyeryong is in latitude 36°20'40" north and longitude 127°12'55" east, Mt. Chilgap is located in lati tude 36°24'35" north and longitude 126°57'30" east Two different areas in Chung-mam were examined by acid fuchsin staining for the presence of mycorrhizae. Fifty-seven species of herbaceous plants known as mycorrhizal species and non-mycorrhizal species were strictly divided by taxonomical way regardless of growth habits. 1. Out of 13 families 31 genus 45 species known as non-mycorrhizal species 6 families were proved to be non-mycorrhizal species and in some species of the other seven families VA-mycorrhiza was found. 2. In all 3 families 12 genus 12 species of two areas regarded as VA-mycor-rhizal species VA-mycorrhiza was observed. 3. But in 2 families 2 species known as non-mycorrhizal species the notable results were examined. Just in Commelina commmis in Chilgab and Galium verum var. asiatium in Gyeryong VA-mycorrhiza was found. According to the results of the experiment it seems that VA-mycorrhiza is affected by the taxonomical way more than by the environmental factors of habits.

2, 2'-Methylene-bis-(3,4,6,-trichlorophenoxy acetic acid)(MTPA)의 肝디스토마症의 治療效果(第一報)

金鍾石,金和雄,金重暎 慶北大學校 醫科大學 1972 慶北醫大誌 Vol.13 No.2

The effect of MTPA was observed in 173 clonorchiasis patients who visited to the department of pharmacology, Kyungpook national university, school of medicine, from Sep., 1969 to Jun,, 1971 and 20, Mar. , 1972. In 173 patients, 162 patients had normal liver function, 10 patients were complicated with acute hepatitis and one of the patients had been inserted T tube into his common bile duct since 7 months after operation for bile stone. MTPA was administered oraly in daily dose of 7∼15㎎/㎏, which was divided into three equal part and given after each meal. To each patient the drug was given for 4 or 5 cures and one cure was composed of 6 days of drug administration and the interval between each cure was 10 days. The effect of drug was estimated with counting the number of eggs of clonorchis in the feces by the MGL method, the results were expressed as "negative", completly disappeared, and "80% diminution", number of the eggs reduced more than 80% than before treatment. Besides egg count, general symptoms and liver function before and after medication, and side effects induced by drug were also observed. The results obtained as follows. 1) In 51 patients treated with 10㎎/Kg/day for 4 or 5 cures, egg-negative rate was 49% and 80% diminution was 37%. 2) In 31 patients treated with 7 ㎎/Kg/day for first cure and than 15㎎/Kg/day for 3 or 4 cures, egg-negative rate was 58.1% and 80% diminution was 35.5%. 3) In 80 patients given in dose of 10㎎/Kg/day for first cure and then 15㎎/Kg/day for 3 cures or 15㎎/Kg/day for 4 cures, the egg-negative rate were 64.7%, and 69.5% and 80% diminution rate were 29.4%, and 23.9% respectively. 4) In the patients administered with MTPA, the gerneral symptoms and signs such as fatigue, anoraxia, indigestion etc. and hepatomegaly were improved. 5) In 10 patients complicated with acute hepatitis and administered with 3㎎/Kg/day for first cure and continued by 7㎎/Kg/day second cure and then 15㎎/Kg/day for 3 cures, 7 of them were egg-negative, 2 of them were 80% diminution. 6) Side effects induced by drug were gastric pain, abdominal pain, diarrhea, dizziness, headache, fatigue and fever, But the side effects were so mild that discontinuance of administration of drug was not necessary in most cases. 7) In the patient inserted with T tube while administered with 7㎎/Kg/day of MTPA, clonorchis sinensis flew out from the T tube in living, but with 15㎎/Kg/day, clonorchis sinensis flew out in dead. From above results we think that MTPA is a useful drug for treatment of clonorchiais, and 15㎎/Kg/day is enough to kill clonorchis sinensis in the body.

Symmetric Cryptographic Algorithms 을 이용한 OSI-분산 시스템에서의 Biba Security 모델의 구현

박종화 世明大學校 1998 世明論叢 Vol.7 No.-

This paper discusses a distributed implementation of the Biba security policy model. In this paper symmetric cryptographic systems are considered for the realization of these security service. It is investigated how key-distributions can be found resulting in a minimum number of key. Application of a symmetric crypographic system results in key-distributions which require more keys tha a key-distribution going with the use PKSs(Public Key System)

수열반응을 이용한 다공성 감마 알루미나의 제조

정승화,문종수,강종봉 경남대학교 신소재연구소 2003 신소재연구 Vol.15 No.2

비정질 알루미나를 기지재료로 이용하고 기공형성제로 활성탄, 무기염 및 폴리머를 첨가하였다. 성형된 담체를 200℃에서 24시간 수열반응을 한 다음 650℃에서 5시간 열처리 또는 80℃에서 24시간 수세를 하였다. PSA, XRD, FEG-SEM, TG/DTA, Porosimeter, Gas Pyconometer, instron을 사용하여 원료 및 세라믹 담체의 특성을 조사하였다. 수열반응 후 활성탄을 첨가한 시편은 boehmite으로 결정 상전이가 일어났으나, 폴리머 및 무기염이 첨가된 시편은 비정질 알루미나로부터 aquohydroxy complex gel의 형성이 되지 않아 결과적으로 boehmite로의 상전이가 일어나지 못하였다. 활성탄을 첨가한 경우 70% 이상의 기공률과 20㎏f/㎠ 이상의 강도를 가지며 v-Alumina 상으로 이루어진 담체를 제조할 수 있었다. Matrix materials for carriers were amorphous alumina, and pore forming agents such as activated carbon, inorganic salt and polymer were added. Formed camers were hydrothermally reacted at 200℃ for 24 hours, heat-treated at 650 C or washed out at 80℃ for 24 hours. PSA, XRD, FEG-SEM, TGDTA, Porosimeter, Gas Pycnometer and Instron were used for the characterization of raw materials and ceramic carriers. After hydrothermal reaction, the specimen with activated carbons shaved boehmite phase, but the specimen with inorganic salts and polymers inhibited the boehmite crystalline formation because inorganic salt and polymers hindered the aquohydroxycomplex gels. The specimen with activated carbons showed high porosity of 70 % and above and high strength of 20㎏f/㎠, of which crystalline phase was γ-alumina.

圓光大學生의 써클활동의 實態 調査

李鍾祿,宋華燮 원광대학교 학생상담센터 1982 學生指導硏究 Vol.- No.2

고환절제 후 백서의 복측 전립선에서의 병리학적 변화에 관한 연구

설종구,윤율로,이중화 충남대학교 의과대학 지역사회의학연구소 1994 충남의대잡지 Vol.21 No.2

The regulation of cell death and renewal is controlled by androgen in rat ventral prostate. So many studies on androgen block effects has been performed to understand the hormonal control in prostatic epithelial cell. Castration of rat results in activation of programmed cell death of ventral prostate. This response is related to activation of the calcium-magnesium dependent endonuclease. To observe the changes of regression of prostatic gland following androgen withdrawal, histologic examination was performed in rat ventral prostate after castration. The level of serum testosterone was rapidly decreased after castration from 5.9 ng/ml in normal rat to 1.6 ng/ml at 3hr castration. After 6hr postcastration its level was 0.01 ng/ml or below. The pathologic changes of ventral prostate was also observed after castration. Apoptosis in the ventral prostate appeared initially at 24hr postcastration but maximal apoptosis was noted at 6days. We confirmed the apoptotic bodies in light microscopic examination be electron microscopic observation.

아미노산의 라세미화 반응을 이용한 치아상아질로부터의 연령추정

송정화,황적준,김종열 大韓法醫學會 1993 대한법의학회지 Vol.17 No.2

For the estimation of age, the measuring of D/L ratio in racemization of aspartic acid(Asp) in human dentine can be used and it estimates age more accurate than the conventional physiological methods. In the natural state, the optical isomers of amino acid slowly undergo spontaneous, nonenzymatic racemization, so the detectable amount of D-enantiomer will be formed from pure L-isomer in dentine. This fact can be used to determine the age of living human and animals or the age of fossil bones. This study, therefore, was measured D/L ratio of aspartic acid in human dentines to estimate the age of each individual. The correlation of D/L ratio of aspartic acid with actual age was obtained as follows, The correlation value between the D/L ratio and the actual age was 0.9886, the standard estimated deviation(σ) was 2.07 years of age and the k(yr??) was 8.0×10??. The actual and the estimated ages coincided in 23% of the cases. The errors of ±1 year were 15%, that of ±2 years wee 40%, ±3 years 15%, ±4 years 4%, respectively. Errors of exceeding 5 years were not obtained.

종합과학적 접근법을 이용한 환경보전정책의 수립

박종화 서울大學校 環境大學院 2001 環境論叢 Vol.39 No.-

안양천의 수질개선과 자연형하천정비 방안

박종화 서울大學校 環境大學院 1999 環境論叢 Vol.37 No.-