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돼지의 세균성 설사증에 대한 항균펩타이드(Buforin Ⅱb)의 야외효능 실험
권성균,이완규 한국수의공중보건학회 2003 예방수의학회지 Vol.27 No.2
The objectives in the present study were to evaluate the therapeutic effect of antimicrobial peptide (Buforin Ⅱ b) against piglet diarrhea in the field test. Experiment was conducted to evaluate the efficacy of Buforin Ⅱb on piglets having diarrhea with two treatments; Treatment A (2 mg of Buforin Ⅱ b/ml) and Treatment B (4 mg of Buforin Ⅱb/ml). Changes in body weight, average daily gains, diarrhea index and shedding of hemolytic E. coli were monitored for the experimental period under field conditions. In this study ( n= 40 pigs), Treatment A and B group reduced diarrhea index(p<0.01, p<0.001) and shedding of hemolytic E. coli, and increased body weight and average daily gain, compared to the Control(+) group. This study indicated that Buforin Ⅱb had therapeutic effect and possibility for treatment in piglets having diarrhea.
비유기중의 소유방염에 대한 항균펩타이드(Buforin Ⅱb)의 효능실험
김인송,권성균,임형준,이완규 한국수의공중보건학회 2002 예방수의학회지 Vol.26 No.3
Recently, a novel antimicrobial peptide including Buforin II has been emphasized to kill multi-drug resistant bacteria and avoid promoting multi-drug resistance. This study evaluated the efficacy of an antimicrobial peptide (Buforin IIb) on bovine mastitis. Based on the Minimum inhibitory concentration(MIC, 4 g/ml) of Buforin IIb, syringes were made five concentration(MIC×10, ×50, ×100, ×300, and ×500). Thirty three cows(38 quarters) with bovine mastitis were selected using California mastitis test and grouped in dependant on drug concentration and treatment duration. Each group treated by intramammary infusion twice a day for 3 5 days. The milk samples of 5 groups were aseptically collected from quarters at 0, 3, 7 and 14 days, and 2 groups were collected at 0, 5, 9 and 14 days after first treatment. Collected samples were used for bacterial culture and somatic cell count. Bacterial number(log_(10) mean CFU/ml) was decreased in dependant on drug concentration and extending treatment duration. In group D(MIC×300), bacterial number was decreased from 4.59±0.10(day 0) to 2.89±1.37(day 3), 4.04±0.33(day 7), and 4.19 ± 0.10(day 14), respectively(p 0.05). Bacterial number of B2(MIC×50, 5 days treated) is decreased, approximately 10%, than group B1(MIC×50, 3 days treated). Somatic cell count of group D was slightly decreased from 11,100(×10³)(day 0), to 7,386(×10³)(3 day), 6,886(×10³)(day 7), and 9,661(×10³)(day 14). Staphylococcus spp., was the most common isolate, was bacteriologically cured 100% by Buforin IIb treatment. Overall results indicate that Buforin IIb could have possibility to cure bovine mastitis, if higher concentration over experimental concentration were treated with extending treatment duration.
화학기상증착법을 통해 합성된 그래핀 및 MoSe2를 이용한 반데르발스 수직이종접합 전계효과 트랜지스터
최선연,고은비,권성균,김민희,김설아,이가은,최민철,김현호 한국접착및계면학회 2023 접착 및 계면 Vol.24 No.3
본 van der Waals heterostructure 기반의 트랜지스터의 경우 표면에 불포화 결함(dangling bond) 없이 van der Waals 힘으로만 결합되어 있어 우수한 전자특성을 보이기 때문에 최근 많이 연구되고있다. 하지만, 트랜지스터에 사용되는 이차원 물질들은 대부분 스카치 테이프(mechanical exfoliation) 방법을 기반으로 하는 기초 연구에 머물러 있다. 그렇기 때문에 이를 발전시키기 위해 반데르발스 수직이종접합전계효과 트랜지스터를 제작하는 데 사용되는 모든 소재를 CVD (chemical vapor deposition)에서 성장된소재를 사용하였다. 전극으로는 CVD로 성장된 그래핀을 포토리소그래피 공정을 통해 패터닝하여 사용하였으며, CVD로 성장된 MoSe2를 픽업/전사하는 방식으로, 둘 사이의 반데르발스 이종접합 전계효과 트랜지스터를제작하였다. 본 연구에서는 이를 통해 제작된 소자의 특성을 보았으며 MoSe2의 결함 유무에 따라 트랜지스터의특성에 변화가 있음을 확인하였다.