마이크로프로쎄서를 利用한 直流分捲發電機의 無負荷特性 測程에 關한 硏究

李興浩,盧泰天 충남대학교 공업교육연구소 1981 論文集 Vol.4 No.2

This paper provides experimental results, obtained by using a microprocessor kit, from the no-load characteristics of the dc shunt generator. Although there are some errors in the experimental resuls because of limitations of A/D converter, it is considered that this study will be useful for the characteristic measurements of electric machines.

파견근로자의 공정성 지각이 직무만족과 조직몰입에 미치는 영향에 있어 신뢰의 매개효과에 관한 연구

김종관,노태무 부산대학교 경영경제연구소 2007 經營 經濟 硏究 Vol.25 No.1

본 논문은 파견근로자들이 인식하는 절차공정성과 분배공성성이 종업원 개인의 직무성과인 직무만족과 조직몰입에 영향을 미치는데 있어 파견근로자들의 조직과 상사, 동료에 대한 신뢰의 매개효과를 연구하였다. 본 연구를 위해 근로자파견을 주 업무로 하는 기업 9개를 대상으로 242부의 유효한 설문결과를 활용하였으며 연구결과, 보상의 공정성과 신뢰와의 관계에 있어서 분배공정성은 조직, 상사, 동료신뢰 모두에 유의한 영향관계를 나타내었으며, 절차공정성은 조직신뢰, 상사신뢰의 경우에서만 유의한 영향관계를 나타내었다. 분배공정성의 경우, 동료신뢰가 유의한 영향을 미쳤으나, 조직신뢰와 상사신뢰의 경우에 비해 영향력이 낮게 나타났으며, 절차공정성의 지각과 동료신뢰는 직접적인 영향이 없는 것으로 나타났다. 보상의 공정성과 조직몰읩의 관계에서 정서적 몰입은 분배공정성과 절차공정성 모두 유의한 영향관계를 보였으며 분배공정성의 설명력이 절차공정성보다 높게 나타났다. 신뢰의 매개효과에 있어서도 분배공정성과 조직몰입 간의 매개효과는 나타나지 않았으나 절차공정성과 조직몰입간의 관계에서는 조직신뢰가 매개작용을 하는 것으로 나타났다. 이러한 연구결과를 바탕으로 연구의 의의, 한계 및 추후 연구과제에 대해 논의하였다. This paper studied on mediating effects of trust among dispatched worker's organization, senior and colleague. procedural justice and distributive justice which are recognized by dispatched workers effect job satisfaction that is job performance of individual employee and organizational commitment. We used 242 questionnaires from 9 firms mainly dealing with dispatching workers. It is also found that the distributive justice has significant effect on organization, senior and colleague trust and while procedural justice shows meaningful effect only on the organizational trust, senior trust. In case of distributive justice, although colleague trust has an effect on distributive justice, it shows less influence than organization trust and senior trust. In additional, there is no direct effect between perception of procedural justice and colleague trust. In the relation between justice of reward and organizational commitment, the affective commitment shows significant effect on distributive justice and procedural justice. The distributive justice has higher than procedural justice. In mediating effect of trust, there was no mediating effect between distributive justice and organizational commitment, but organizational trust works as mediating role in relation between procedural justice and organizational commitment. Based on results of this research, we discussed about meaning and limited of the research, and future study.

단클론 항체를 이용하여 정제한 톡소포자충 30 kDa 항원의 면역학적 특성

이영화,노태진,신대환,Lee, Yeong-Hwa,No, Tae-Jin,Sin, Dae-Hwan 대한기생충학회 1997 The Korean Journal of Parasitology Vol.35 No.1

The molecular weight 30 kDa membrane protein of Toxoplusma Sondii (Toxoplasma 30 kDa) apparently conserved in most strains of T. gondii and sera of infected hosts. The present study aimed to elucidate Toxoplasmc 30 kDa as a useful diagnotic antigen for serodiagnisis of toxoplasmosis by ELISA and for induction of protective immunity. Murine spleen cells immunized with the membrane antigen of T. gondii were fused with mouse Sp2/0-Ag 14 myeloma cells. Out of 8 clones selected, five were IgG2b, the others belonged to IgG 1 and IgG2a. The 30 kDa antigen was distributed mainly on the surface membrane of tachyzoites by indirect fluorescence method. Murine peritoneal macrophages which were activated by 30 kDa antigen produced more amounts of NO2 compared with crude antigen-treated group, however there were no significant differences in toxoplamacidal activity between the two groups. Higher specificity of Toxoplosma 30 kDa antigen was recognized for serodiagnosis of toxoplasmosis than the crude antigen. From these results, ToxopLasmo 30 kDa antigen enhances the cytotoxic effect of macrophages as well as a more reliable means for the serodiagnosis of toxoplasmosis by ELISA. Key words: Toxoplosma gondii, 30 kDa antigen (p30), mouse, serodiagnosis, macrophage, cytotoxicity. 톡소포자충(ToxopLasmn gondii)은 다양한 항원을 가지고 있으며, 이들 항원의 분석은 세 포매개성 면역반응 및 톡소포자충증의 면역학적 진단방법의 연구에 매우 중요하다 본 연구는 톡소포자충의 여러 단백질중 대부분의 충주(strain)에 존재하는 분자량 30 kDa의 단백질을 단클론 항체를 이용하여 분리한 후. 30 kDa 항원의 면역학적 특성을 초음파 추출 조항원과 비교 평가하였다. 톡소포자충의 세포막 항원으로 면역한 마우스 비장세포와 마우스 Sp2/0-Agl4 골수종세포를 융합하여 8개의 단클론 항체를 Western blot으로 확인하였다 이들 단클론 항체는 높은 특이성을 보였으며, $IgG_{2b}가{\;}5개,{\;}IgG^{1}이{\;}2개,{\;}IgG_{2a}$가 1개였다. 간접형광항체법으로 충체내 위치를 관찰한 결과. 30 kDa 항원은 tachyzoite의 표면 세포막에 주로 분포하였다. 단클론 항체와 CNBr-activated Sepharose 4B를 coupling하여 만든 immunoafrnity chromatography를 이용 하여 30 kDa 항원을 분리하였다. 분리한 30 kDa 항원으로 자극시킨 마우스 복강대식세포의 $NO_2^{-}$ 생산량은 초음파 추출 조항원 사용군에 비해 유의하게 증가하였으나 대식세포의 탐식능은 유의한 차이가 없었다. 또한 ELISA로 톡소포자충증을 진단시, 톡소포자충 30 kDa 항원 사용군은 조항원 사용군에 비해 민감도의 변화는 없었으나 특이성은 증가하였다 이상으로 보아 톡소포자충 30 kDa 항원은 감염 방어 면역 효과가 있었으며 진단에 이용시 특이성을 더 높일 수 있었다.

비용ㆍ편익 분석을 중심으로 한 중수도 시설의 처리방법별 적정규모선정

노상환,민동기,송영일,박태욱,박주양 한양대학교 환경공학연구소 2000 環境科學論文集 Vol.21 No.-

미래의 안정적인 수자원 확보를 위한 수요관리방안인 중수도 시설 설치 시 발생하는 비용과 편익의 현재가치를 이용하여 처리방식별로 중수도 시설의 경제성 분석을 하였다. 사회적 편익을 고려하였을 경우 중수도 시설규모가 300㎥이상의 1일 처리용량의 경우 경제성이 있는 것으로 나타났다. 그러나 사적편익을 고려하였을 경우에는 사회적 편익에서 고려된 환경비용절감등의 여러 외부 편익이 포함되지 않아 중수도 시설에 의한 편익이 작아지게 된다. 따라서 사적편익만을 고려할 경우에는 대체로 경제성이 있는 중수도 시설의 규모는 사회적 비용을 고려하였을 경우 보다 커진다. Water reuse is a control method of water demand to steadily assure water resources in the future. Economical efficiency of wastewater reuse plants with various treatment processes was studied using the present value of cost-benefit. When social benefits are considered, the capacity of 300㎥/ day was found to be economically effiecient. However, when private benefits are considered, the social benefit of wastewater treatment plant decreases because the private benefits do not include environmental expenses and other benefits which are included in social benefits. Therefore, when the private benefits are only considered, the economically efficient capacity of the wastewater reuse plant will be higher than that considering social expenses.

비강비호즈킨 림프종의 전산화단층촬영 소견 : CT Features

노태연,백호길,원종부,박성호,박오봉,백승국,신미정,김봉기,최한용 침례병원 1998 浸禮病院學術誌 Vol.14 No.-

신라대학교 주변 백양산의 동물상

노치권(외 6명) 신라대학교 자연과학연구소 2012 自然科學論文集 Vol.22 No.-

To study fauna of Silla University located in Mt. Baek-yang, we conducted six surveys from 29 May 2011 to 28 April 2012. We found five phyla 41 orders 197 species of animals inhabiting in this area: four phyla 27 orders 163 species of invertebrates and in vertebrates one order six species of fishes, three orders nine species of amphibians and reptiles, six orders 14 species of aves, and four orders five species of mammals. Of these species, some Korean endemic species were included: a fish of Rhodeus uyekii in a pond near main gate of this university, a frog of Rana coreana in a creek near a dormitory, and a rabbit of Lepus coreanus and a water deer of Hydropotes inermis in a grass region near a main stadium. A kind of hawk, Falco tinnunculus as a natural monument (animal) of no. 323-8, was observed on a building of medical and life science. A blue frog of Hyla japonica as a variation was found near a spring resort. Therefore, this area is considered an ecologically important area having a high animal diversity.

Euonymus alatus추출물의 실험적 당뇨발생 억제효과

김태중,송희종,소준노,이정호 大韓免疫學會 1996 大韓免疫學會誌 Vol.18 No.4

Insulin-dependent diabetes mellitus (IDDM) is majorly caused by an immune system-mediated destruction of the beta cells in the islets of Langerhans. Patients with IDDM face major changes in lifestyle and the possibility of debilitating and life-threatening complications. In Korean traditional medicine, Euonymus alatus (EA) extract has been widely used for preventing and curing ulcer and inflammation. A previous study has shown that EA itself has an antidotic activities against inflammation, suggesting possibility that EA can exert this beneficial effects to IDDM by an initial protection against diabetes caused by pancreatic inflammation. The present study was undertaken to evaluate the prophylactic effect of EA extract on the diabetogenesis of streptozotocin (STZ) and alloxan (ALX), using animal model, and to explore the possible mechanisms of its antidiabetic activity. Multiple low doses of STZ (45 mg/Kg for 5 days) in ICR mice and single dose of ALX (60 mg/Kg) in SD rats induced high level of hyperglycemia (defined as plasma glucose level > 300 mg/dl) and remarkably diminished body weight. But, animals that received diabetogenic agents in combination withsEA were maintained plasma glucose level as a normal state ( < 150 mg/dl), and appeared in good health and had similar weights to those of normal control. These results strongly indicated that EA prevented and blocked diabetogenesis of chemicals. EA significantly inhibited the nitric oxide- and tumor necrosis factor-production of mouse peritoneal macrophages. However, EA enhanced interleukin 1 production of macrophages at lower concentration but not at higher. EA itself increased phagocytic activity of unstimulated monocytes, but it did completely block that activity of zymosan- or platelet activating factor-stimulated cells. Taken together, this study led to conclusion that EA itself has a significant prophylactic effects against diabetes, and also suggested that its antidiabetic effects might be manifested by the downregulation of inflammatory process in diabetogenesis.

Zinc Titanate에서 H₂S 흡수특성 조사

이태진,박노국,권원태,장원철,박영성 嶺南大學校 環境問題硏究所 1996 環境硏究 Vol.16 No.1

요약문사출성형법으로 평가를 위해 ZnO 함량을 변화시키면서 4종류의 Zinc Titanate 흡수제를 제조하였다. Zn/Ti 몰비가 증가할수록 지배적인 결정상은 Zn 2Ti3O8과 Zn2TiO4로 관찰되었다. Zinc Titanate 탈황제에 의한 H2S 흡수반응을 모사석탄가스의 고온탈황에 의해서 실험적으로 연구하였다. 내경 3cm인 석영관의 고정상 반응기로 4종류의 Zin cTitanate 흡수제에 대하여 H2S 흡수와 재생의 10-cycle 실험을 수행하였다. 파과곡선, SEM, BET 등의 실험적인 관찰을 근거로 하여 650℃가 최적 흡수반응온도임을 결정하였다. 탈황과 재생의 반복적인 실험동안 H2S와 S02의 파과곡선들을 구하였다. 또한, 시험 전후의 흡수제의 물성변화를 SEM, EDX, Hg-porosimetry 및 BET 방법으로 분석하였다. 비록 더많은 연구가 필요하지만, 제한된 실험적 조건에서 판단하면 YZT-3(Zn/Ti=1.5)가 가장 우수한 탈황제라고 결론내릴 수 있다.AbstractFour zinc titanate sorbents were prepared for evaluation by extrusion method with varying ZnO contents. The predominant crystalline phases were Zn2Ti3O3 and Zn2TiO4 as Zn/Ti molar ratio was increased. Absorption of HzS by the zinc titanate sorbents was studied experimentally in high temperature desulfurization of simulated coal gas. Fixed-bed system of 3 cm i. d. quartz tube was used to carry out 10-cycle experiments of H2S absorption and regeneration for the zinc titanate sorbents. In these experiments the optimal absorption temperature was determined as 650 ℃ based on experimental observation of breakthrough curves, SEM and BET results, and so on. H2S and SO; breakthrough curves were obtained for each sorbent during repetitive cycles of desulfurization and regeneration. Also, property changes of the sorbent before and after testing were analyzed using SEM, EDX, XRD, Hg-porosimeter and BET method. It is concluded under this limited experimental conditions YZT-3 (Zn/Ti =1.5) was the most suitable desulfurization sorbent even though further tests are required.

천연제올라이트를 지지체로 사용한 고온건식 아연계 탈황제의 반응특성 연구

박노국,정용길,이종대,이태진,김재창 한국화학공학회 2003 Korean Chemical Engineering Research(HWAHAK KONGHA Vol.41 No.5

고온건식 탈황제의 지지체로 알루미나와 천연제올라이트를 사용하여 아연계 탈황제를 제조하였으며 성능을 조사하였다. 두 가지 탈황제의 반응특성실험은 480℃/580℃(황화/재생온도)에서 칸 밸런스와 고정층 반응장치로 반응속도와 황수용능력을 비교하였으며 내마모 실험장치를 이용하여 탈황제의 내마모도를 조사하였다. 두 탈황제의 성능 실험결과 천연제올라이트를 지지체로 사용한 탈황제의 초기 황화반응속도가 알루미나를 지지체로 사용한 탈황제보다 빨라졌으며, 10 cycle에서 황수용능력이 20 gS/100 g sorbent 이상 유지되었다. 내마모성은 AI(마모지표)값이 14.7%정도였다. 본 연구에서는 천연제올라이트의 고온건식 탈황제의 지지체로 적용 가능성을 확인하였다. Two types of zinc-based sorbents using alumina and natural zeolite as the supports for hot-gas desulfurization were prepared, and investigated their desulfurization capability. Their reaction rate and sulfur capacity were compared by Cahn balance and over the fixed bed reactor system at 480℃/580℃ (sulfidation/regeneration). The attrition resistance was measured by ASTM methd. Thc initial sulfidation rate of ZnO/natural zeolite sorbent was higher than that of ZnO/alumina, and the sulfur capacity of ZnO/natural zeolite sorbent was maintained above 20 gS/l00 g sorbent for 10 cycles. A attrition index was 14.7%. The use of natural zeolite as a support of sorbents may be possible for hot gas desulfurization.

Toluene, Xylene, Trichloroethylene 투여가 흰쥐의 시상하부와 뇌하수체의 GnRH, GnRH Receptor, Pit-1 유전자 발현에 미치는 영향

기노석,이종태,강대성,김대환,이채관,이헌,전진호,김정호,이채언 大韓産業醫學會 1998 대한직업환경의학회지 Vol.10 No.2

The workplace exposure of chemicals has steadily increased, therefore the concern for subsequent effect on reproductive outcome has been an important issue in occupational medicine. In previous studies, higher rates of spontaneous abortion, reduced fertility and menstrual disorder among women, and an impairement of sperm quantity and quality among men have been associated with a wide variety of chemical agents. This study was conducted to evaluate the effects of toluene, xylene and trichloroethylene(TCE) injection on the mRNA levels of GnRH, GnRH receptor and Pit-1 genes in male rats hypothalamus and pituitary and the effects on the plasma levels of FSH, LH, prolactin and testosterone. Sprague-Dawley male rats were divided into five groups of five each according to concentration of toluene, xylene and TCE. The rats were injected subcutaneously to 0, 50, 100, 200, 400 mg/kg body weight/day of toluene, xylene and TCE, respectively for 6 days. Rat brains were excised and hypothalamus and pituitary were separated. Reverse transcription-polymerase chain reaction (RT-PCR) and RNase protection assay(RPA) were used to evaluate the GnRH, GnRH receptor and Pit-1 mRNA levels. Plasma concentrations of FSH, LH, prolactin and testosterone were assayed by radioimmunoassay(RIA). The results were as follows; 1. GnRH, GnRH receptor and Pit-1 mRNA levels in toluene and xylene injected groups, and GnRH receptor mRNA levels in TCE injected group were lowered dose-dependently. Especially, GnRH receptor and Pit-1 mRNA levels in 200mg/kg of toluene injected group, and GnRH, GnRH receptor and Pit-1 mRNA levels in 400mg/kg of toluene injected group were significantly lower than control group (p<0.05). GnRH receptor and Pit-1 mRNA levels in 400mg/kg of xylene injected group, and GnRH receptor mRNA levels in 400mg/kg of TCE injected group were significantly lower than control group(p<0.05). 2. The plasma levels of prolactin and testosterone in 400mg/kg of toluene injected group, and LH in 100, 200 and 400mg/kg of xylene injected group, and testosterone in 400 mg/kg of TCE injected group were significantly lower than control group(p<0.05). In conclusion, we speculated that toluene and xylene affected reproductive system secondarily through hypothalamus-pituitary axis, and TCE affected directly through steroidogenesis. And we recommended that further study for assessment of the reproductive toxicity of mixed organic solvent exposures should be conducted.