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마이크로파 여기 플라즈마광 생성을 위한 도파관 시스템 설계에 관한 연구
전상재,전후동,송창현,하석영,이승혁,이태호,박의준 금오공과대학교 2005 論文集 Vol.26 No.-
In this paper, the plasma lighting system(PLS) excited by the commercial high power magnetron is developed. The design concepts are based on maximizing the huninous efficacy in conjunction with the miniaturization of waveguide system Furthermore the fine tuning is simplified by using only one stub, and the impedance matching is maximized by introducing the tapering technique. The experimental results show that the luminous efficacy can be dramatically improved by the proposed design method.
Facilitation of visual processing by masked presentation of a conditioned facial stimulus
Lee, Tae-Ho,Lim, Seung-Lark,Lee, Kyu-Yong,Choi, June-Seek Lippincott Williams Wilkins, Inc. 2009 NEUROREPORT - Vol.20 No.8
We tested whether a conditioned emotional stimulus could facilitate visual processing when presented subliminally. Participants received Pavlovian conditioning in which a fearful expression (conditioned stimulus) was paired with electric finger shock (unconditioned stimulus). In a subsequent session, they were subject to a simple perceptual task involving subliminal presentation of facial expressions followed by a simple color patch. Although none of the participants reported conscious detection of the facial stimuli, early posterior negativity was significantly enhanced to the conditioned fear face and the neutral face of the same identity. Paralleling the brain activity, reaction times to the conditioned stimulus faces were also facilitated. These results suggest that conditioned threat stimuli can facilitate perceptual processing even when they are processed unconsciously.
마비성패류독의 생물학적 제독 : 2. 해수에서 분리한 Enterobacter sp. CW - 6 를 이용한 마비성패류독의 분해
이태호,박미정,이희정,김지회,이태식 한국수산학회 2000 한국수산과학회지 Vol.33 No.6
해수에서 분리한 마비성패류독 분해 균주 Enterobacter sp. CW-6 균주의 마비성 패류독소 최적 분해 온도 및 시험 균주의 독소 분해과정 중의 독소 함량 및 구성성분을 조사한 결과는 다음과 같다. 시험 균주는 배양 적온으로 확인된 30, 35℃에서 배양 5일만에 각각 최초 첨가 독력의 56.8, 44.1%, 12일 후에는 93.0, 79.5%를 분해하였다. 그러나, 배양 적온에서 벗어날수록 균주의 독소 분해활성은 감소하여 20℃에서는 배양 12일 후에도 최초 독력의 69.0%가 잔존하였다. 시험 균주 Enterobacter sp. CW-6는 30℃에서의 조독소를 이용한 분해 활성 측정에서 초기 농도 38.2 nmole/g의 마비성패류독을 배양 8일 및 12일째 각각 88.4%, 92.7% 분해하였다. 정제 독소를 이용한 분해 시험에서, 조독소 분해과정 중에 일시적으로 증가하는 STX group은 GTX2, 3에서 전환된 것으로 확인 되었다. 시험 균주 Enterobacter sp. CW-6는 정제 독소에 대해서도 강한 분해 활성을 나타내었으며, 최초 농도 47.0 nmole/g의 GTX1과 37.0 nmole/g의 GTX4를 분해 과정 12일 후에 각각 100, 90.8% 분해하였으며, GTX2, 3 혼합물에 대하여는 최초농도 25.6 nmole/g의 독소를 12일 후에 66.4%까지 분해하였다. Optimum temperature for paralytic shellfish poison (PSP) detoxofication of Enterobacter sp. CW-6 isolated from sea water and changes of contents and ingredients composition of PSP during bacterial detoxification process were investigated. Enterobacter sp. CW-6 detoxicated 61.5∼67.7% and 87.4∼96.8% of initial PSP toxicity (25.1∼28.5 nmole/g) after 5-12 days at 30 and 35℃, identified as optimal growth temperature, respectively. The detoxification rate of Eeterobacter sp. CW-6 for crude PSP with initial concentration of 38.2 nmole/g after 8 and 12 days at 30℃ in the Marine broth was 88.4 and 92.7%, respectively. During bacterial detoxification process using crude toxin solution, temporary increasement of STX group was detected and identified that was derived from GTX2, 3 group. The detoxification rate of Enterobacter sp. CW-6 on purified GTX1 and 4 with initial concentration 47 nmole/g and 37 nmole/g were more dean 90% after l2 days in the marine broth at 30℃. Enterobacter sp. CW-6 also showed a detoxification activity on purified GTX2 and 3, and the detoxification rate for the initial concentration 25.6 nmole/g after 12 days was 66.4%.
양식 넙치(Paralichthys olivaceus)에 대한 Erythromycin 휴약기간 설정
이태식 ( Tae Seek Lee ),박미정 ( Mi Jung Park ),최혜승 ( Hye Sung Choi ),심길보 ( Kil Bo Shim ),박미선 ( Mi Seon Park ),신일식 ( Il Shik Shin ) 한국수산학회 2009 한국수산과학회지 Vol.42 No.3
The withdrawal time of erythromycin in cultured olive flounder was investigated to ensure the food safety of the fish treated with erythromycin. The oral administration of erythromycin was carried out using the experimental diet containing erythromycin (200mg/kg) daily dose of 40 mg/kg body weight. The 45 day experimental period was broken into 7 days of habituation, 8 days of medication and 30 days of additional feeding without antibiotics. The erythromycin concentration in the flounder muscle had been increased gradually with medication. After 5 days of medication, the concentration increased to its maximum level of 6.05mg/kg. After discontinuing the antibiotic, the erythromycin concentration decreased drastically and day 9 was below 0.1mg/kg. The erythromycin concentration had slowly declined from the 6th to the 20th day after medication and disappeared completely after 25 days. From these results, the time needed to reduce the erythromycin level to the 0.2mg/kg limit adopted by the EU and Japan was suspected to be 4-6 days. Therefore, a reasonable withdrawal time following EU and Japanese regulatory guidelines for erythromycin in the cultured flounder could be estimated to be 10 days.
양식 넙치(Paralichthys olivaceus)에 경구투여한 Ampicillin 및 Amoxicillin의 어류체내 잔류량의 변화
손광태 ( Kwang Tae Son ),조미라 ( Mi Ra Jo ),오은경 ( Eun Gyoung Oh ),목종수 ( Jong Soo Mok ),권지영 ( Ji Young Kwon ),이태식 ( Tae Seek Lee ),송기철 ( Ki Cheol Song ),김풍호 ( Poong Ho Kim ),이희정 ( Hee Jung Lee ) 한국수산과학회(구 한국수산학회) 2011 한국수산과학회지 Vol.44 No.5
Residues of ampicillin and amoxicillin in the muscles of olive flounder Paralichthys olivaceus were investigated after oral doses of 20 mg/kg body weight/day of ampicillin and 40 mg/kg body weight/day of amoxicillin in a first examination and 40 mg/kg body weight/day of ampicillin and 80 mg/kg body weight/day of amoxicillin in a second examination for 5-6 days. The ranges of seawater temperatures in the 1st and 2nd examinations were 13.4-15.6oC and 16.8-21.4oC, respectively. Ampicillin and amoxicillin concentrations were analyzed by high performance liquid chromatography (HPLC). The average recovery rates of ampicillin and amoxicillin in fish samples ranged from 84.8- 95.2% and 100.8-103.8%, respectively. Residual concentrations in the olive flounder peaked on the 5th day, with average concentrations of 0.075 mg/kg and 0.311 mg/kg in the 1st examination, and 0.098 mg/kg and 0.630 mg/kg in the 2nd examination for ampicillin and amoxicillin, respectively, with maximum concentrations in muscle. In the 1st examination, ampicillin concentrations in olive flounder after withdrawals of 1 and 3 days were 0.041 mg/kg and 0.023 mg/kg, respectively, and amoxicillin concentrations after withdrawals of 1 day and 10 days were 0.172 mg/kg and 0.023 mg/kg, respectively. In the 2nd examination, the ampicillin concentrations in olive flounder after withdrawals of 1 and 3 days were 0.041 mg/kg and 0.023 mg/kg, respectively, and amoxicillin concentration after withdrawals of 1 day and 10 days were 0.172 mg/kg and 0.023 mg/kg, respectively. We suggest that the recommended withdrawal periods should be 3 days for ampicillin and 10 days for amoxicillin in the olive flounder.