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      • 經膣免疫에 對한 硏究

        朴佑淳 中央醫學社 1965 中央醫學 Vol.8 No.5

        In order to know the effect of antigenic substances introduced into the vagina on the antibody production, heat-extracted antigen of Shigella flexneri la ox serum, and homologous and heterologous semen were socked in cotton ball and repeatedly impregnated into the vagina of rabbits, and antibodies in serum and vaginal washing were pursued by means of precipitation, hemagglutination and agglutination techniques. The effect of cortisone, sex hormones and antibiotics on the antibody production was also studied and the following results were obtained. 1. Precipitating, hemagglutinating and agglutinating antibodies against Sh. flexneri la antigen and ox serum were produced in sera of rabbits when antigens were repeatedly impregnated in vagina. Antibody titers were higher in pregnant rabbits than in non-pregnant. 2. Cortisone administered subcutaneously during the vaginal impregnation of antigen inhibited completely the antibody production in sera, and almost completely the antibody production by subcutaneous immunization. Testosterone and estrogen slightly enhanced the effect of vaginal immunization, but not that of sub-cutaneous immunization. Large amounts of penicillin, streptomycin and aureomycin showed inhibitory effect against vaginal as well as subcutaneous immunization. 3. Cortisone, sex hormone and antibiotics administered before or beginning of the immunization expressed only minor effect in the beginning of immunization. The effect of these substances was also observed in the booster immunization. 4. Semen of rabbit introduced in vagina of rabbit did not show any antigenic effect, but semen of guinea pig repeatedly introduced in vagina of rabbit showed antibody production in only small amount. 5. Tn the course of vaginal immunization, antibody was only weakly determined by hemagglutination in vaginal washing. 6. Antibody production in sera of rabbit was very poor when antigenic substances were inpregnated in vagina of rabbits whose portio uteri were ligated to cut out the communcation between uteri and vagina.

      • 배관의 캐비테이션 침식-부식 특성에 관한 연구

        임우조,황재호,김윤곤 釜山水産大學校 1994 釜山水産大學 硏究報告 Vol.34 No.1

        In this study, the steel pipe piping water(SSPW) and SPPW on weldment were tested by using of a cavitation erosion - corrosion test appartus with nozzle(water tunnel type) and were investigated under the marine environment of liquid. The main results obtained were as follows 1) The corrosion - erosion of weldment is more susceptible than that of base metal. 2) The weight loss rate of heat affected zone of weldment can be largely improved by the preheat, dry of base metal and electrode before welding. 3) The electrode potential becomes noble by the pre-heat, dry of base metal and electrode before welding, and the corrosion current density is decreased.

      • KCI등재
      • 캐비테이션 손상에 미치는 기포 거동에 관한 연구

        임우조,황재호 釜慶大學校 1996 釜慶大學校 論文集 Vol.1 No.2

        Cavitation is a hydrodynamic phenomenon which results in the formation and collapse of vapour bubbles in a liquid. The stresses produced when the bubbles collapse are considerable and severe erosion may occur to any solids in the vicinity. Cavitation damage is common in ship propellers, pump impellers and in the lubricating or cooling liquids of a vibrating machine such as a diesel engine. Both rotating disc and venturi devices are used to produce cavitation in the laboratory but the most convenient and commonly used devices are based on ultrasonic transducers and there is now a considerable amount of information on the cavitation erosion of materials. In this study, cavitation damage was investigated by using the piezoelectric vibrator with 20 kHz, 24㎛ to cavity generation apparatus. In order to investigate the reliablity for the cavitation erosion-corrosion test apparatus, the cavitation bubble group of test water was carefully measured with respect to test time. The photographs of the cavitation regimes were taken with a high speed camera arrangement by which the cavitation phenomena were studied. It is worth noticing in the vibratory cavitation apparatus that the cavitation bubble group does not fluctuate with test time. The result was ascertained by high speed photographs, which indicated uniform cavitation bubble group with test time.

      • SUS 304 鋼의 SCC 特性에 미치는 pH의 영향

        林祐助 釜山水産大學校 1985 釜山水産大學 硏究報告 Vol.25 No.1

        一定 變位 引長試驗機를 利用하여 pH가 SUS 304 鋼의 SCC 初期 潛伏期間에 미치는 영향을 硏究한 結果 다음과 같은 結論을 얻었다. 1) 용접열 영향부의 SCC 初期 潛伏期間은 모재보다 용접열 사이클로 因한 銳敏化현상 및 軟化에 의해 빨라진다. 2) 용접열 영향부의 應力腐蝕균열은 MgCl₂溶液의 溫度상승에 의한 陽極의 活性에 기인된다. 3) pH를 높게 함으로써 SCC 初期 潛伏期間은 크게 지연된다. The characteristics of stress corrosion cracking of SUS 304 stainless steel were studied with the specimens of the constant displacement type under the environment of various pH(MgCl₂aqueous solution). Main results obtained are as follows: 1) The latent time of crack initiation of weld heat affected zone in the stress corrosion cracking zone has rapid for phenomenon of sensitizing and softening caused by weld heat cycles than that of base metal. 2) The stress corrosion cracking of weld heat affected zone was owing to the active of anode by increasing temperature of MgCl₂aqueous solution. 3) The latent time of crack initiation is delayed in the stress corrosion cracking under high condition of pH.

      • 獨逸語形容詞文型硏究

        韓宇槿 誠信女子大學校 1976 硏究論文集 Vol.9 No.-

        Die deutschen Adjektivsatztypen, die in den Satzbauplanen als Satzerganzungn Adjektive enthalten, werden in dieser Arbeit dreifach, d.h. aus dem Gesichtspunkt von Hans-Jurgen Heringers Werke 〃Deutsche Syntax" und 〃Theorie der deutschen Syntax", Johannes Erbens〃Deutsche Grammatik, Ein AbriB" und Paul Grebens" Duden Grammatik" heraus wissen-schaftlich betrachtet und miteinander verglichen. I. Adjektivsatztypen von Hans-Jurgen Heringer: 1. 〃Deutsche Syntax" von Hans-Jurgen Heringer ermoglicht uns metatheoretisch die folgenden 15 Typen mit 16 Arten von deutschen Adjektivsatzen zu formulieren. 2. Davon werden die nur theoretisch daseienden, aber in Wirklichkeit nichtdaseienden Typen mit der Hilfe von PA??-Typen in〃 Theorie der deutschen Syntax" eliminiert, und dabei werden auch die immer noch ubrig gebliebenen PA??-Typen und vor allem dieselben in VERK erscheinenden auf die Kernsatze reduziert. Dessen Ergebnis ist wie folgend: 13 Typen mit 14 Arten.

      • 경도 정신지체 학생에 대한 탐구 지향적인 과학교수 방법 연구 : 물질에 관한 학습 특성을 중심으로 On Learning Characteristics of the Matter

        김우희,하미경 단국대학교 1998 論文集 Vol.33 No.-

        In the investigation, student with mental retardation were observed over a 8month period, in order to determine the characteristics of mental retardation manifested themselves in the context of inquiry-oriented, hands-on science curriculum. Analysis of all relevant data obtained from observations and field notes, audiotape recordings and student products, and interviews of the student suggested that several characteristics commonly attributed to students with mild mental retardation were observed how they interact with the science curriculum. These characteristics included attentiveness, capability of logical reasoning, and the students’ outerdirectedness. Based on these characteristics, we can imply science teaching for students with mental retardation as follow: First students were able to construct scientific knowledge actively through inquiry-oriented science curriculum. Second, hands-on scientific skills were useful in promoting appropriate social behavior, attentiveness and perseverance. Third, peers were helpful in applications of skills through mutual encouragement, but were less helpful in promoting learning outcomes. Forth, elaborative questioning and detailed instructions by teachers often seemed to be necessary, especially for successful knowledge construction.

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