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심재용,박기영,이홍균 대한미생물학회 1974 大韓微生物學會誌 Vol.9 No.1
During March to October 1973 at Kational Medical Center, one thousand four hundred sixty four pathogens that exclude penicillin sensitive organisms such as gonococcus, pneumococcus, streptococcus; ampicillin sensitive H, influenzae and gentamicin sensitive pseudomonas spp,. Were isolated. These strains identified as follows: Sta. Aureus 399 E. coli 359 Sta. Epidermidis 183 Klebsiella spp 171 Proteus spp 103 B. anitratum 80 Salmonella spp 68 Enterococcus 53 Shigella spp 48 In general, Sta. Epidermidis is regarded as nonpathogen, however, author included pure culture of this bacteria in this study. 1. High susceptibility to staphylococcus reveals cephalosporin, methicillin, gentamicin & leucomycin. 2. Ampicillin is only one susceptible antibiotic to Enterococcus. 3. Cephilosporin and gentamicin reveal susceptible antibiotics to E. coli. 4, Gentamicin is only one susceptible antibiotic to Klebsiella spp. 5. Gentamicin & carbenicillin reveal moderately susceptible antibiotics to Proteus spp. 6. There is no susceptible antibiotic to B. anitratum. 7. About thirty percent strains of salmonella are resiatant to chloramphenicol. 8. Carbenicillin, cephalosporin & gentamicin reveal susceptible to shigella spp. 9. Multiple resistant rate to more than two antibiotics which includes tetracycline are as follows. Sta. Aureus 56.5% E. coli 80.9% Shigella spp 93.8%
Sr-Fe based Metal Oxides를 이용한 이산화탄소 분해에 관한 연구
심재용,김상혁,김진용,박찬영,이기봉,남성찬 한국공업화학회 2019 한국공업화학회 연구논문 초록집 Vol.2019 No.1
본 연구는 Oxygen Deficient Metal Oxides를 이용하여 대표적인 온실가스인 이산화탄소(CO<sub>2</sub>)의 분해를 목적으로 진행되었다. 기존의 Spinel-type Ferrite를 이용한 CO<sub>2</sub>분해 실험은 작은 Batch-type 반응기에서 진행되었을 뿐만 아니라 분해 효율이 매우 낮아 산업현장의 적용에는 많은 무리가 있다. 따라서 효율적인 CO<sub>2</sub> 분해를 위해 Perovskite과 Nonperovskite-type의 금속산화물을 조사 하였고, SrFeO<sub>3-δ</sub>와 SrFeCo<sub>0.5</sub>O<sub>x</sub>를 선별하여 연속적인 흐름 속에서 분해 실험을 진행하였다. Sr-Fe based 금속산화물들의 Reduction behaviors를 구조적으로 관찰하기 위해 High Temperature Powder X-ray Diffraction (In-situ XRD), Thermogravimetric Analysis (TGA), Temperature Programmed Reduction (TPR)을 수행하였다. 연속적인 반응기 내에서 CO<sub>2</sub>는 최대 90%이상 분해되는 구간을 보였으며 80%이상 분해되는 시간은 200분 이상 지속되었다. 본 실험을 통해 선택된 두 Oxides의 구조적 변화과정은 물론, 새로운 촉매 선택의 방향도 제시 되었다. 이와 같은 연구 결과를 이용해 온실가스인 이산화탄소를 효과적으로 처리하여 국가 온실가스 저감에 기여할 수 있기를 기대한다.
국책연구기관의 연구개발 글로벌화 전략- 한국전자통신연구원의 사례를 중심으로 -
심재용,백문식,백의선 에스케이텔레콤 (주) 1998 Telecommunications Review Vol.8 No.2
본 논문에서는 선진국 기업들의 글로벌화 사례를 중심으로 국책연구기관의 연구개발 글로벌화 요인과 방향을 정리하고, 국가의 연구개발 글로벌화 전략에 있어서 국책연구기관의 역할과 글로벌화 유형에 대한 분석을 시도해 보았다. 이러한분석에서 연구개발 글로벌화의 범위를 연구개발 분야 뿐만 아니라 연구기획·관리 분야에까지 확대하여 벤치마킹 대상기관을 선정하고 각 부문별 추진전략을 도출하였다. 벤치마킹 대상기관의 선정 및 부문별 추진전략의 수립은 전문가들에 대한 설문조사를 통해 이루어졌으며, 타 기관의 사례를 중심으로 현재 운영중인 국책연구기관 해외사무소의 발전방향을 제시하였다. 이 연구는 분석의 대상을 상품화 연구중심의 기업에서 핵심기반 연구중심의 국책연구기관으로 확대한 탐색적 연구로서, 추후 국책연구기관
Halothane 마취시 “Train of Four” 반응으로 본 d-Tubocurarine 의 용량에 따른 근육이완
심재용,전세웅,서재현 대한마취과학회 1982 Korean Journal of Anesthesiology Vol.15 No.4
There are many reports that d-tubocurarine has marked species and individual variations in the matter of muscle relaxation. Therefore the dose-related neuromuscular blocking effect of d-tubocurarine was studied in anesthetized patients. Eighty adult patients were studied during halothane-N_2O-O_2 anesthesia for various kinds of surgery. These patients were in good physical shape, without known or suspected liver, kidney, neuromuscular or hormonal disease, and were not taking medication known to influence the action of relaxants. Preanesthetic medication consisted of atropine 0.01 mg/kg and valium 0.18 mg/kg intramuscularly 60 minutes before anesthesia. anesthesia was induced with thiopental 4-5 mg/kg. Succinylcholine 1 mg/kg was used to facilitate tracheal intubation. Moderate hyperventilation was maintained throughout by a mechanial ventilator and patient temperature was maintained at 35-36℃ during the study. Forty patients received a single intravenous d-tubocurarine 0.1 mg/kg (Group A) after the succinylcholine effect had worn off and the other forty patients received a single intravenous d-tubocurarine 0.2 mg/kg (Group B) after the succinylcholine effect had disappered. Prior to the administration of d-tubocurarine, the patient's forearm and hand were firmly fixed to a specially constructed metal armoboard. The thumb was abducted, fixed and connected to a electrical kymography, Harvard apparatus. The ulnar nerve was stimulated at the wrist subcutameous needle electrodes by means of supramaximal stimuli from a peripheral nerve stimulator (model 91-M3, Emerson, U.S.A). Square wave of "Train of four" stimuli of 0.2 msec duration were delivered at a frequency of 0.1 Hz. The evoked twitch and tracing of the adductor muscle of the thumb was recored continuously on a electrical kymograph. Upon recovery from the initial dose of succinylcholine, a stable baseline twitch tension was recorded for 15 minutes. At this point a single intravenous injection of d-tubocurarine, either 0.1 mg/kg or 0.2 mg/kg was given. The data were plotted as onset time of twitch depression and percentage depression of twitch height and the recovery time of "Train of four" response were analyzed in each group. The results were as follows; 1) In d-tubocurarine 0.1 mg/kg group: the effect of d-tubocurarine was variable, ranging from no effect on twitch tension to abolition of the twitch response. Mean maximal twitch depression was 59.4%. Recovery index which showed more than 75% twitch depression was 39.9 minutes. 2) In d-tubocurarine 0.2 mg/kg group: the effect of d-tubocurarine obtained consistent and solid neuromuscular relaxation. Mean maximal twitch deprension was 95.2%. Recovery index was 58.1 minutes.