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서울의 Penicillinase Producing Neisseria Gonorrhoeae 발생빈도(1994)
김재홍,안진균,정성재,김영태,김중환,김시영,이석종,이홍렬,서호석,김경훈,권혁진,정우권,고우석,이용석,안필수,오준규,오용섭 대한화학요법학회 1996 대한화학요법학회지 Vol.14 No.1
Background : In recent years gonorrhoea has been panendemic and remains one of the most common Sexually Transmitted Diseases in the world, especially in developing countries. Objective & Method : For the detection of a more effective therapeutic regimen and assessing the prevalence of Penicillinase Producing Neisseria Gonorrhoeae(PPNG), Ive have been trying to study the patients who have visited the VD Clinic of Choong-Ku Public Health Center in Seoul since 1980 by means of the chromogenic cephalosporin method. Results : In 1994, 168 strains of N. gonorrhoeae were isolated, among which 109 (64,9% ) were PPNG. Conclustion : Our results suggests that the prevalence of PPNG in Seoul is still increasing.
제주도 연안 인공어초 시설어장의 자원조성과 생산효과에 관한 연구
안영화,김준택 제주대학교 해양연구소 2000 해양자원연구소연구보고 Vol.24 No.-
The adhesive condition of shellfish and seaweeds and effects of production for artificial reefs were surveyed through field investigation during the period of 1994 -1998 in the coast of Jeju Island. The obtained results are summarized as follows : 1. 4 species of shellfish & 44 fishies (950g/㎥) were found at Overbridge type reefs area in the coast of Hado-Rj and 2 species of shellfish & 21 fishies (475g/㎥) were found a t Horn trangular type reefs area in the coast of Ilgwa-Ri and 1 species of shellfish & 6 fishies (30g/㎥) were found a t Horn trangular type reefs area in the coast of Biyang-Do. This shows a high density of shellfish in that area except for Biyang-Do reefs area. 2. Adhesive living condition of seaweeds was showed 9 species (8.270g/㎥) in the Hado-Ri and 5 species (330g/㎥) in the Ilgwa-Ri and 5 species (10.490g/㎥) in the Biyang-Do grounds. This showed a high density of Ecklonia cava and Sargassum fulvellum in that area except for Biyang-Do reef area. but Biyang-Do area was a high density of Codium fragile 3. The result are catch per unit from trammel nets. artificial reef area was showed 5 species & 16 fishies (2.950g) and natural reef area was showed 4 species & 34 fishies (2.300g). Thus. a catched fishes in the artificial reef area was large size. natural reef area was small size fishes and control area was floating fishes.
전우정,신화우,최광식,안세민,이광표,장영수 원광대학교 식품약품안전성연구소 1993 食品藥品安全性硏究 Vol.6 No.-
Magesium twisilicate is mainly uaed as a nonsytemic antacid andabsrbent. Magnesium trisilicate when teeated with anacid sxuh as diluted hydrochloric acid in gastric juice decomposes to form Magnesium chloride and colloidal Silicates. 2MgO·3SiO_2 + 4Hcl - 2MgCl_2 + H_4Si_3O_8 (or 3SiO_2 + 2H_2O) Colloidal mixture The resultng colloidal silicates can protect ahe ulcer frdm further acid and peptic attack and possibly adsorb the pepsin. It is well known that yield of Magnesium trisilcate produced is greatly affected by the Synthesis condition such as the reactant concentration, reaction temperature and moleatio of reactant solutions as well as by the emperature at which the precipitate is dried and the temperature of washing water, etc. The purpose of this study is to investigate the optimum synthesis conditions of Magnesium trisilicate. A randomized complete block design suggested by G.E.P. Bdx and K.B. Wagnesium sulfate solution with Sodium silicate solution in this study. It was found that optimal synthesis conditidns were: Reaction temperature range : 57-90 ℃. Concentration range of reactants (Sodium silicate and Magnesium sulfate) : 19.1-29% molar ratio of the reactants. [Sodium silicate]/[Magnesium sulfate]: 1.47-1.80. temperature range of washing water: 45-48℃ and drying temperature range: 65-82℃ The antacidic activity of five Magnesium trisilicate samples which shows the maximum antacidic efficacy was tested by pharmacopeia acid consuming capacity test. The five Magnesium trisilicate samples were samples were identified by chemical analysis.
FDM에서 경사면의 표면과 면적오차법의 관계에 대한 연구
전재억,정진서,황영모,김수광,김준안,계중읍,하만경 한국공작기계학회 2002 한국공작기계학회 추계학술대회논문집 Vol.2002 No.-
In any rapid prototyping process, the layer by layer building process introduces an area error between the staircase and the surface line specified by the computer-aided design model. This affects the dimensional accuracy as well as the surface finish for different part build orientations. This paper describes a methodology for computing the area error for any orientation of the part built by the fused deposition modelling system. This technique can be applied to determine the best build orientation of the part, based on the minimum area error. This technique is verified by comparing the results with the experimental measurements of the area error of the parts built at different orientations.
고출력 CW Nd:YAG 레이저를 이용한 CSP 1N 박판재 절단시 공정변수의 절단표면특성에 미치는 영향
안동규,김민수,이상훈,유영태,박형준 한국공작기계학회 2004 한국공작기계학회 추계학술대회논문집 Vol.2004 No.-
The objective of this research work is to investigate the influence of process parameters, such as power of laser, travel speed of laser and material thickness, on roughness and striation of the cut surface for the case of cutting of CSP IN sheet using high power Nd:YAG laser with continuous wave (CW). In order to find the practical cutting region and the relationship between process parameters on the roughness and the striation, several laser cutting experiments are carried out. From the results of experiments, the allowable cutting region and an optimal cutting speed for each cutting condition have been obtained to improve the quality of the cut surface. In addition, it has been shown that the surface roughness is related to the number of striation and depth of valley of the cut surface.
미생물을 이용한 미역폐기물의 저장 및 알긴산염 저분자화
안성준,김영숙,박권필 한국환경과학회 2004 한국환경과학회지 Vol.13 No.3
We studied a storage of waste-brown seaweed at room temperature and degradation of alginate in seaweed by microorganism DS-02. The seaweeds, mixed with 5.0 wt% DS-02 and sealed in vinyl package without any other treatment, could be stored longer than 1 year without spoilage at room temperature. During the storage process, the alginate of seaweed was decomposed by enzyme of DS-02 and the molecular weight of alginate decreased to about 1/10 of initial quantity. DS-02 growed as fast as it had maximum weight after 24 hour culture and it's enzyme had a maximum activity of alginate degradation at 40 ℃. The seaweed sample became particles in DS-02 culture solution and the M.W of alginate decreased to about 1/10 of initial value after 24 hour decomposition. The effect of alginate degradation with DS-02 was similar to that of degradation with 3.0 M HCl solution for 24 hour.
미생물을 이용한 미역줄기에서 알긴산염 추출 및 저분자화
안성준,김영숙,박권필 한국환경과학회 2004 한국환경과학회지 Vol.13 No.12
We studied a extraction and degradation of alginate from seaweed-stems using microorganism DS-02. DS-02 has a maximum growth rate at 30 ℃ and the enzyme has a maximum activity of alginate extraction at 35 ℃. The yield of alginate extraction using DS-02 is about 16.0% for 3.0 hour and molecular weight of the alginate decreased to about 1/8 of initial value after 24 hour extraction. Alginate extraction method by DS-02, compared with general alkali-extraction method, has an advantage of decreasing the molecular weight of alginate during extraction.
소양호 퇴적물에 함유된 인의 존재형태와 용출가능성에 대하여
전상호,박용안 江原大學校 附設 環境硏究所 1989 環境硏究 Vol.6 No.-
Fractional composition and mobility of sediment phosphorus in Lake Soyang are investigated. The fractional scheme was made for four chemically defined hposphorus forms as adsorbed phosphorus, non apatite inorganic phosphorus(NAI-P), apatite phosphorus and residual phosphorus. These forms were measured by chemical extraction techmique. The most abundant fraction is residual phosphorus and the secondly abundant form NAI-P, and thirdly apatite phosphorus, and finally adsorbed phosphorus. The most efficient processes of scavening of dissolved phosphours in the lake are biological uptake and chemical complexation. To evaluate the eggects of pH on the mobility of sediment phosphorus, incubation experiments under aerobic and different pHcondition of leaching solution are accomplished. The results show the pH of the leaching solution has strong influence on the release of sediment phosphorus and increases of leaching in high pH aremore apparent in the NAI-P rich sediments than those in the residual P rich sediments.