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김태영,손원우,권태엽,강인규,김교한 大韓齒科器材學會 2002 대한치과재료학회지 Vol.29 No.3
The effects of electrolyte concentration and current density on the behaviour of volt-time curve of the anodizing, morphology, roughness, crystallinity and composition of the oxide layer were studied. Microstructural morphology, crystallinity, composition and surface roughness of oxide layer were analyzed by observed by scanning electron microscopy(SEM) and X-ray diffractometry(XRD), Energy-dispersive spectrometer(EDS), Electron Probe Micro Analyzer(EPMA)and roughness tester, respectively. The results of this study showed that the voltage incresed as the anodizing time increase. The growth of the oxide film developed a barrier layer to a pore-like layer with an increasing of current density, arising a spark discharge. On the morphology of anodic oxide layer the number and size of porosity was increased by increasing anodizing time at a constant concentration of electrolyte. The size of porosity and the roughness of the anodic oxide layer were increased by the increasing of concentration of electrolyte. The anodic oxide layer obtained in the conditions of this experiment was identified as anatase. The crystallinity of oxide layer was decreased by increasing the concentration of electrolyte at constant current density, and increased by the increasing current density at constant electrolyte concentration. In the EPMA analysis of anodic oxide layer, the concentration of phosphorous was increasing the electrolyte concentration and increasing the final voltage at constant electrolyte concentration, The ratio of O/Ti of the oxide layer obtained in this experiment was near 2 confirming this oxide layer was TiO₂
광주·전남 지역에서 발생한 스포로트리쿰증 103예에 대한 임상적 고찰(1967-1996)
전인기,김훈희,김성진,이승철,원영호 대한의진균학회 1997 대한의진균학회지 Vol.2 No.2
Background : Sporotrichosis is most common deep cutaneous fungal disease in Korea. It is markedly variable in incidence, distribution, and colinical pattern. The epidemiology have been well known to change over years, and to be influenced by environmental condition and geographic location. Sporotrichosis in Kwangju and Chonnam area is more prevalent compared to other areas in Korea. Objective : Our purpose was to describe the prevalence, epidemiological and clinical features, regional distribution and the change of the incidence according to the climate in different regions. Method : the observation of 103 sporotrichosis patients confirmed by clinical, histopathological and mycological studies had been made in the Department of Dermatology at Chonnam National university Hospital for thirty years from 1967 to 1996. Results and Conclusion : The sporotrichosis patient was 0.09% of 108, 680 outpatients, prevalent at the age of thirties and forties(20%), and 3.2:1 in the ration between male and female. The 58% of total cases visited us within 3 months after the beginning of skin lesion. Almost all initial lesions appeared on the exposed areas, especially upper extremities(68%). The 74% of the total cases was lymphocutaneous type, and the rest was fixed cutaneous type. Most popular occupation of patients was farmer(60%). The 69% of patients visited in spring and winter, especially in february(17%). The incidence of sporotrichosis per average 100,000 population in districts of Kwangju and Chonnam area revealed a difference with the amount of rainfall in winter; average 1.8 person in an area above 125㎜,0.8 person in an area between 100㎜ and 125㎜, and 0.2 person in an area below 100㎜ These rsults suggest that the incidence and clinical features of sporotrichosis are influenced by occupations, leisure and occupational activities, living conditions, and the climate.
정사면체 구조를 갖는 Cu(Ⅱ) 및 Co(Ⅱ) 착화물들의 아쿠오화반응에 관한 연구
金永仁,催星洛,金奵淑,金海京 부산대학교 기초과학연구소 1988 부산대학교 기초과학연구소 연구논문집 Vol.8 No.-
Co(sp)X₂P(sp=sparteine, C_(15)H_(26)N₂, X=Cl, Br)과 Cu(sp)X²의 아쿠오화반응이 메카니즘을 규명하기 위하여 pH∼5인 조건에서 속도론적 연구를 실시하였다. Co(sp)Cl₂및 Co(sp)Br₂는 halide 이온들에 의해 촉매 효과를 나타내지 않았으며 Cu(sp)Cl₂및 Cu(sp)Br₂에 비해 매우 빠르게 아쿠오화가 진행되었다. Cu(sp)Cl₂와 Cu(sp)Br₂는 halide cyanide의 존재에 의해 반응속도가 크게 증가하였으며 pH=2∼5인 범위에서 pH가 증가함에 따라 반응속도가 증가하였다. 본 연구에서 얻어진 실험결과, Co(sp)X₂의 아쿠오화반응이 D-메카니즘으로 진행되는 반면 Cu(sp)X₂의 경우는 I_(d) 메카니즘으로 진행되는 것으로 믿어진다. The rates of aquation of sparteine cobalt(Ⅱ) halide and sparteine copper(Ⅱ)halide were investigated in the citrate buffer solutions. The aquation of cobalt(Ⅱ) complexes proceeds via D-mechanism and the catalytic effect of halide ions is not observed. The aquation of copper(Ⅱ) complexes proceeds via I_(d)-mechanism and is catalyzed by the presence of cyanide and halide ions, and the aquation rate is pH dependent. The different mechanistic behavior of cobalt(Ⅱ) complexes from corresponding copper(Ⅱ) complexes seems to be attributed to the weakness of Co-N bond in the coordination sphere.
충청북도에서 분리한 느타리버섯 갈변병 병원세균의 병원성
이혁인,이승돈,박경선,김영기,차재순 충북대학교 농업과학기술연구소 1997 農業科學硏究 Vol.14 No.-
One hundred sixty seven bacterial isolates were obtained from the bacterial brown blotch-disea-sed oyster mushrooms collected from 37 mushroom cultivation houses throughout Chungcheungbukdo. The 21(11.9 %) of them formed white line when they were cultured with white line reacting organism(WLRO) and 14 (6.5%) were classified WLRO by white line test. All white line forming isolates against WLRO skewed strong pathogenicity and hemolytic activity to rat red blood cells. Six of the white line forming isolates were identified as Pseudomonas tolaasii which is known a pa-thogen of brown blotch disease of button mushroom (Agaricus bisporus) and oyster mushroom (Pleurotus ostreatus) and four of them were Psudomonas fluorescens type G (biovar V) by BiologR bacterial identification system. WLROs consisted of heterogeneous group of bacteria ; Seven of them were identified as P. fluorescens type A (blovar I) and the rest of them were P. fluorescens type G,P. corrugata, P. tolaasii, and unidentified isolate. Some of the WLROs showed weak pathoge-nicity on rapid pitting test. P. tolaasii A- R and 6041R were mutagenized with transposon No. 5 (Tn5) and the mutants which could not form white line against WLRO were selected. All white line negative Tn5 mutants lost the pathogenicity and ability of hemolysis. The results suggest that tolaasin which is a lipodepsipeptide toxin produced by P. tolaasii and known an causal agent of white line forming in the bacterium is the primary disease determinant of P. tolaasii.
오영애,하귀현,박인경,김미향,김미정,김미경,정자림,이명숙,김순동 대구효성가톨릭대학교 식품과학연구소 1992 식품과학지 Vol.4 No.-
This paper showed the summarization of the preservative method of wild vegetables in the house and the precessing method of Japanese pickles. The preservative methods of wild vegetables were explained devided into long, short term, fresh state, heat treatment and drying. Salt, soybean fermented sauce, soybean fermented paste, lees of refined rice wine and residue in the preparation of bean curd were used as the materials of Japanese pickles.