閃亞鉛鑛에서 Xanthate의 吸着에 關한 硏究

梁海承,韓五炯 조선대학교 기초과학연구소 1986 自然科學硏究 Vol.9 No.1

In the flotation of sulfide ores, Xanthates are most commonly used to prepare the surface of the mineral to be floated so that attachment air takes place. The amount of xanthate adsorbed was determined from the decrease in xanthate concentration in the solution during the test. Important results are follows; 1) The adsorption of xanthate shows that it has maximum absorption peak at a concentration of 20㎎/ℓ. 2) Necessary amount of copper sulphate as a activator is about 1X10^-3 mol/ℓ. 3) The adsorption of xanthate of sphalerite decreased in accordance with the increase of pH. 4) Effect of temperature of tile solution on adsorption of ethyl xanthate is increased with the temperature of the solution.

和順炭鑛의 通氣에 對한 考察

梁海承 조선대학교 동력자원연구소 1996 動力資源硏究所誌 Vol.18 No.1

This research is to check the results of intake air quantity, outlet air quantity and the temperature of pits which are operating in first, second and third incline of Dong Gan(eastern pit) in Whasoon coal mine. The total intake air volume and it outlet volume measured in this pit was 2.319㎥/min and 2.419㎥/min, respectively. The average operating temperature of this mine was 28℃. The ventilation quantity based upon the required volume of ventilation and temperature was 6.6㎥/min per man by thedretical calculation method and on the other hand, the ventilatin quantity based on the pit temperature was calculated as 642㎥/min. These results means that this mine is properly operating according to the mine safy regulations.

가정과 수업의 협동학습이 학생의 교과에 대한 흥미와 태도에 미치는 영향

양정혜,신상옥 한국 가정과 교육 학회 1998 한국가정과교육학회지 Vol.10 No.1

The purpose of this (1) to develop the teaching plan based on Cooperative Learning approach and (2)to investigate the effect of students' Interest on Subject mater and Teaaching method and Attitudes to others on the area of Foreign food in Home Economics class. Among those various types of Cooperative Learning's this study adopted 'Learning Together' developed by Johnsons. To investigate these purpose, subject matter were analyzed and reconstructed for Cooperative Learning. The tests were developed to evaluate the interest on the Subject matter and teaching methods, an the attitude to thers of the students. 108 femail high school students were divided into two groups with 54 students-traditional learning condition, Cooperative Learning condition-and had a 5 session. The subject of the class was foreign food including Western, Chinese, and Japanes food. Before and after the class, students were tested. The statistical methods used for the study were t-test. The research findings are as fooows : When the students in the Cooperative Learning classes were compared before and after the test, (1) interest on Subject matter were improved considerably(p〈.001) (2)Interest on Teaching methods were improved considerably p〈.05) (3)Attitude to Others were improved considerably (p〈.001) Therefore when the teaching-learning mldel based on Cooperative Learning was used in Home Economics class, their interest on the subject and teaching methods and attitude to others were improved.

제주도 함덕연안해역의 해황·기상의 계절변동에 관한 연구

양성기,김해동,최찬문 제주대학교 해양연구소 1995 해양자원연구소연구보고 Vol.19 No.-

유아놀이에 대한 유치원 교사의 인식 및 실태조사

양옥승,지성애,김영옥,홍혜경 한국영유아보육학회 2002 한국영유아보육학 Vol.0 No.28

This study investigated the teacher's recognition and the status about children's play in kindergartens. A questionnaire was developed for this study and was used in collection of data. The questionnaire consisted of 54 items and divided into five areas. The subjects in this study were two hundreds and seventeen kindergarten teachers from rural and urban areas. The data were calculated by frequency, mean, and standard deviation and were analyzed by χ2, t-test, ANOVA, and Tukey method for multiple comparisons. The results showed that the teacher's recognition and the status about children's play in kindergarten were significantly differed by variables of teachers, such as ages, teaching experiences, and education backgrounds.

화순광업소 기계화 중단 채탄법 고찰 : 동갱을 중심으로

梁海承 조선대학교 에너지.자원신기술연구소 1998 에너지·자원신기술연구소 논문지 Vol.20 No.1

Most of the korean coal seam are so irreguler in thickness steep in slope that there are much difficulties in mechanization of coal seam development From the 1980', Dae han coal cooperation having pushed the business of mechanization of coal development had hard effectivity and productivity The East pit 12 level(-210m in sea level) of this mine was changed 2 1m×2 1m(7′×7′) into 3 3m×2 1m in cross section and also shifted into iron 3 mesh steel arch(GI-100) from timber prop to increase the effectivity of production As a result of this changes, the increase of depth ratio was from 15m per year to 5m per year and the production ratio was also increased to 33% on the other hand, the mechanization of this mine showed 20 percent of decrease in man power and proved to be increased in recovery The temperature of this mine pit was 25℃ in average, 90% of humidity and 0 25% of average CO₂ gas It was confirmed that this mine was running properly according to mining safety regulation

제주도 함덕연안해역의 해황·기상의 계절변동에 관한 연구

양성기,최찬문,김해동 濟州大學校海洋硏究所 1995 해양과환경연구소 연구논문집 Vol.19 No.-

Time series data of oceanic and meteorological elements observed by Marine Research Institute, Cheju National University are used to investigate seasonal variabilities in oceanic and atmospheric conditions. Heat ?? elements at the sea surface are derived from the data of the marine meteological reports by applying an aerodynamical bulk method. The seasonal variation of serveral heat flux elements were abnormal during the analysed period(June,1993 ∼ September, 1995), and it might be related to global-scale changes in the ocean-atmosphere system. And the oceanic condition of the northern Cheju Island was sensitive to the insolated solar radiation.

실시간 홀로그래픽 간섭법을 이용한 삼차원적 미소변형의 측정

나상훈,정해양 경희대학교 자연과학종합연구원 1995 자연과학논문집 Vol.1 No.-

Three dimensional deformation of a cantilever steel plate under the bending stress is measured quantitatively by a real time holographic interferometric system using liquid gate. Quantitative data were taken by the interference fringe order counting in conjunction with the computer image processing. The experimental data show good agreement in comparison with theoretical analysis.

위선암에서 Metallothionein과 p53의 표출

이상희,김의한,오미혜,조현득,양승하 순천향대학교 교수학습개발센터 2004 Journal of Soonchunhyang Medical Science Vol.10 No.3

Gastric adenocarcinoma is the most common malignate tumor in Korea. Many oncogenes have been found in malignant tumor cells. Among these oncogenes, MT has high affinity for metals such as copper and zinc, The fuction of MT is metabolism and detoxification of copper and zinc, The relation between the expression of MT and prognosis of patients in various cancers are reported but is controversial. p53 is a regulator of cellular proliferation, and the over expression of p53 relates to malignant transformation and prognosis. To evaluate the expression of MT and p53 according to histopathologic fearures and the relation between these antigens and prognosis in gastric adenocarcinoma, we have performed immune staining, using mouse anti-MT and mouse anti-p53. The results were as follows; 1) The expression rates of MT and p53 in gastric adenocacinoma were 67.6% and 56.3%, respectively. 2) MT in gastric adenocarcinoma showed statisfically significant higher expression rate under 59 years than above 60 years(P=0.043). p53 showed higher expression rates under 59 yerars, but there is no significant difference(P-0.078). 3) MT showed statisfically significant higher positive rates in cases showing invasion within the gastiric wall than cases showing invasion surrounding tissue(P=0.051), but no significant difference according to progression, differentiation, lymph node metastasis or not. 4) p53 showed especially higher expression rates in advanced carcinoma than in early carcinoma(P=0.065), and no significant difference according to differentiation, invasing depth, lymph metastasis or not. 5) Gastric adenocarcinomas expressing MT(+) p53(-) are early carcinoma 14 cases(73.7%), advanced carcinoma 5cases(26.3%). There is statisfically significant difference compared to carcinomas showing MT(+) p53(+), MT(-) p53(-), MT(-) p53(+)(P=0.003). According to differrentiation, progression, lymph node metastasis or not there is no significant difference. 6) Correlation between MT and p53 in gastric adenocarcinoma were not seen. Above result indicated that MT in gastric adenocarcinoma may be related to progression of cancer. Also significant defference in early carcinoma showing MT(+) p53(-) may be indicates relation to prognosis.

유방질환에서 CEA의 분포에 관한 연구

이해혁,양승하,강상균 순천향대학교 1992 논문집 Vol.15 No.2

Carcinoembryonic antigen(CEA), isolated from adenocarcinoma of human digestive system and fetal or gut tissue, is one of tumor associated antigen. In recent years, presence of CEA in various tumors and inflammatory disease has been reported, but studies in mailgnant and bengin cisease of breast, common in female of korea, was rare. Therefore, to understand positive rate of CEA in these disease, the author collected ductal carcinoma 24 cases, fibroadenoma 15 cases, intraductal papilloma 4 cases, and fibrocystic disease 11 cases, and performed immunoenzyme histologic reaction by Avidin-Biotin-complex method using anti-CEA serum, andanalyzed their histologic reaction. 1. In 24 cases of ductal carcinoma, positive reaction of CEA was 16 cases(67%). 2. According to types of ductal carcinoma, positive reaction of infiltrating ductal carcinoma was 9(56%) of 16 cases, intraductal carcinoma all 6 cases, and medullary carcinoma 1(50%) of 2 cases. 3. In benign diseases, positive reaction of fibroadenoma was 2(13%) of 15cases, intraductal papilloma 1(25%) of 4cases, and fibrocystic disease 2(18%) of 11 cases. The above results showed that ductal carcinoma was relatively high positive rate for CEA, especially intraductal carcinoma, and noted that the more differentiation of the carcinoma, the more strong positivity of the CEA. Benign disease showed low positive rate and focal reaction. but evidence of production of CEA was identified in these disease.