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氣泡塔內에서 iso-프로판올 수용액의 가스홀드엎에 관한 연구
睦演洙 釜山工業大學校 1985 論文集 Vol.27 No.-
Gas holdup was studied according to the content of solution, viscosity, surface tension and specific gravity of solution, and gas velocity for aqueous iso-propyl alcohol solution in a bubble column. The results were as follows; 1. As the content of iso-propyl alcohol increased in the range of 20-100??%, gas holdup decreased and gas holdup was largely affected by gas velocity in the range of values from 1.09cm/sec to 6.03cm/sec. 2. As surface tension of solution increased, gas holdup increased. 3. The correlation between gas holdup and physical parameters is φ(??ε) (??)×10??=KRe?? and the values of constanst are K=0.435, n=1.645 for 100??% of iso-PrOH, K=0.361, n=1.998 for 80-20??% of aqueous iso-PrOH solution.
睦鶴洙 부산대학교 공과대학 1991 工大論文集 Vol.41 No.-
This paper proposes a method to calculate quantitatively the degree of automation and flexibility of assembly system. The degree of automation is grasped whether the detailed assembly function is automatic or manual operation in the assembly station. The degree of flexibility can be calculated by the estimation of cost which is caused by the changed environment in the production.
기포탑내에서 n-프로판올 수용액의 가스홀드엎에 관한 연구
睦演洙 釜山工業大學校 1986 論文集 Vol.28 No.2
Gas holdup was meausred for aqueous n-propanol solution known as azeotropic mixture with various properties of solution and gas velocities. From experimental results, the empirical correlation was obtained among surface tension and viscosity of solution, density and viscosity of gas, geometric factor of perforated plate, gas flow rate and gas holdup. The resulted expression for gas holdup is ?? = K Re?? and the values of constants are K=0.373, n=1.841 for 100-20??% of aqueous n-PrOH solution.
睦鶴洙 부산대학교 공과대학 1991 工大論文集 Vol.41 No.-
This paper presents a procedure for evaluating and improving the assemblability of the product. First, the weak assembly processes based on assembly time are selected. Second, the weak points in assembly are estimated by considering the flexibility of parts, the blocking of assembly part and the intervention of assembly part. And then, the assemblability is improved through the simplification of the part shape and the assembly process. The validity of this procedure was proved through an example product, the fluorescent lamp.
睦弼洙,金世民 고려대학교 의과대학 1989 고려대 의대 잡지 Vol.26 No.1
Despite of fact that many articles dealing with blood group specific isoantigens have been published in recent year, precise meaning of presence and distribution of these isoantigens has not been clearfied yet. Many articles only demonstrated contradicting facts each other regarding distribution and presence of these isoantigens. In the past, tissue isoantigens were demonstrated by using the immunofluorescence and mixed cell agglutination technique. The recent technical development of histochemistry was able to convey more sensitive and simple technique to detect tissue isoantigens, namely immunoperoxldase technique. In this study, the peroxidase-antiperoxidase technique was used to demonstrate the blood group antigens A, B, and H in various gastric lesions. The aim of this investigation was to demonstrate the behavior of blood group substance in various gastric lesions. Particular attention was paid to the relationship between the differentiation, types and metastasis of gastric cancer, and preservation of blood group isoantigens. Gastric tissues obtained from 37 patients with various gastric lesions, namely normal gastric mucosa, gastric ulcer, gastric cancer with or without metastases and early gastric cancer were subjected for this study. The isoantigens were present in all normal gastric mucosa(5 cases) and reduced in 3 of 10 benign lesions(30%). But there were 18 cases(82%) with reduced isoantigenicity and 13(60%) cases with absent isoantigenicity in 22 cases of malignant gastric lesions. There were minimum decreased antigenicity in 1 out of 5 gastric ulcers and 3 out of 5 gastric dysplasia. But there were markedly decreased antigenicity in 9 out of 11 early gastric cancers and 9 out of 11 advanced gastric cancers. Moreover, there were 7 cases of early gastric cancers and 6 cases of advanced gastric cancer with absent antigenicity. There were no clear relationship between the differentiation and preservation of isoantigeuicity in gastric cancers. There were also no clear relationship between Borrman's types and preservation of isoantigenicity in gastric cancer. Among the 6 non-metastatic gastric cancers, 4 cases showed reduction(67%) and 3 cases showed total loss of antigenicity(50%). Whereas, there were 5 cases of reduction(100%) and 3 cases(60%) of total loss of antigenicity in 5 cases of metastatic cancer. There were 20% loss of antigenicity in S cases of A group, 60% loss of antigenicity in 5 cases of B group, 33% loss of antigenicity in 3 cases of AB group and 89% loss of antigenicity in 9 cases of 0 group. The above results suggest the immunohistochemical study of ABH isoantigen using the peroxidase-antiperoxidase technique may be useful in more precise diagnosis of early stomach cancer, and also available in prediction of metastasis and prognosis in advanced stomach cancer.