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고옥현,강형룡,유진철,김경수,홍석순,김영수,황화영,하재천 조선대학교 약학연구소 1992 藥學硏究誌 Vol.14 No.1
7β[5-(Substituted) phenyl-2H-tetrazol-2-yl]acetamidocephalospranic acid, 7β-(5-Diphnenyl-methyl-2H-tetrazol-2-yl) acetamidocephalosporanic acid and 7β-[5-(Substituted)-4-phenyl-1.2.4-triazol2-yl]thioacetamidocephalosporanic acid were synthesized and tested in vitro antimicrobial activity. These compounds exhibited good antimicrobial activity against Gram-positive bacteria whereas most compounds showed decreased antimicrobial activity against Gram-negative bacteria
C_3 및 C_7위치에 치환된 새로운 세파로스포린 化合物의 合成과 抗菌活性(Ⅰ)
황화영,하재천,김영수,고옥현,강형룡 조선대학교 약학연구소 1994 藥學硏究誌 Vol.16 No.1
The synthesis and antimicrobial activity of cephalosporin having (Z)-2-(2-aminothiazol-4-yl)-2-trityloxyiminoacetamido group and 5-(2-chlorophenyl)-4-phenyl-4H-1, 2, 4-triazol-3-thiomethyl group on the C_3 and C_7 position of the cephem ring, respectively are descrived. This compound was tested for antimicrobial activity in vitro against Candida albicans ATCC 10231, Bacillus subtilis ATCC 6633, Micrococcus luteus ATCC 9341, Staphylococcus aureus ATCC 6538P, Mycobacterium phlei IIP-IPH, Escherichia coli KCTC 1039, Escherichia coli ESS, Klebisiella pneumoniae KCTC 1560, Salmonella typhymurium TV-119, Pseudomonas aeruginosa IFO 13130. The antimicrobial activity of synthetic compound was better as compare with cefotaxime and cefazoline against Micrococcus luteus ATCC 9341 & Escherichia coli KCTC ESS.
Evaluation of improved vaccine for type C Foot-and-Mouth Disease in cattle and pigs
Su-Hwa You(Su-Hwa You),Hye-Eun Jo(Hye-Eun Jo),Joo-Hyung Choi(Joo-Hyung Choi),Mi-Kyeong Ko(Mi-Kyeong Ko),Sung Ho Shin(Sung Ho Shin),Min Ja Lee(Min Ja Lee),Su-Mi Kim(Su-Mi Kim),Byounghan Kim(Byounghan K 한국예방수의학회 2019 한국예방수의학회 학술대회자료집 Vol.2018 No.-
고형화 ( Hyung Hwa Ko ),서석용 ( Seok Yong Seo ) 한국항행학회 2015 韓國航行學會論文誌 Vol.19 No.6
2진(binary) MQ 산술부호화는 최근 들어 멀티미디어 압축 표준시스템에 기본 엔트로피 방식으로 사용되고 있다. MQ 산술부호기는 JBIG2와 JPEG2000에 적용되면서 압축성능을 인정받기 시작했다. 최근에 차세대 동영상 부호화 표준인 HEVC (highefficiency video coding)에는 산술부호화가 단일 엔트로피부호화로 채택되면서 그 중요성이 커지고 있다. 기존의 2진 MQ 산술부호기는 RANGE(구간)을 분할하는 과정에서 곱셈을 없애면서 근사화 방법을 사용하고 있다. 이 경우 MPS/LPS의 구간이 뒤바뀌는 경우가 발생하며 출력비트가 늘어날 수 있다. 본 논문에서는 이러한 문제점을 완화하기 위하여 근사식을 사용하는 대신에 룩업테이블 형태로 AQe의 값을 양자화하여 계산에 적용하는 방법을 제안하고자 한다. 제안한 방법의 압축 성능을 실험을 통해 확인한결과, 2진영상 압축표준 방식인 JBIG2의 경우 약 4%의 압축율의 개선을 보였다. 정지영상 압축표준인 JPEG2000의 경우 약 1%정도의 개선을 가져왔다. 룩업테이블을 사용하기 때문에 계산량이 기존방법에 비해 늘지 않는다. Binary MQ arithmetic coding is widely used recently as a basic entropy coder in multimedia coding system. MQ coder esteems high in compression efficiency to be used in JBIG2 and JPEG2000. The importance of arithmetic coding is increasing after it is adopted as an unique entropy coder in HEVC standard. In the binary MQ coder, arithmetic approximation without multiplication is used in the process of recursive subdivision of range interval. Because of the MPS/LPS exchange activity happened in MQ coder, output byte tends to increase. This paper proposes an enhanced binary MQ arithmetic coder to make use of a lookup table for AQe using quantization skill in order to reduce the deficiency. Experimental results show that about 4% improvement of compression in case of JBIG2 for bi-level image compression standard. And also, about 1% improvement of compression ratio is obtained in case of lossless JPEG2000 coding. For the lossy JPEG2000 coding, about 1% improvement of PSNR at the same compression ratio. Additionally, computational complexity is not increasing.
고옥현(Ok Hyung Ko),강형룡(Hyung Ryong Kang),유진철(Jin Cheol Yoo),김경수(Gyung Soo Kim),홍석순(Suk Soon Hong),김영수(Young Soo Kim),황화영(Hwa Young Hwang) 대한약학회 1992 약학회지 Vol.36 No.2
7beta-(5-Aryl-2H-tetrazol-2-yl)acetamidocephalosporanic acid (23~26) and 7beta-(5-Aryl-4-phenyl-4H-1,2,4-triazol-3-yl)thioacetamidocephalosporanic acid were synthesized by condensation of 5-Aryl-2H-tetrazol-2-acetyl choloride(17~20) and 5-Aryl-4-phenyl-4H-1,2,4-triazol-3-thioacetyl chloride(22~24) with 7-Aminocephalosporanic acid (7-ACA), respectively. These seven compounds were tested in vitro antimicrobial activity. These exhibited good antimicrobial activity against Gram-positive bacteria whereas most compounds showed decreased antimicrobial activity against Gram-negative bacteria.
Evaluation of vaccines for the SAT 1, SAT 2, and SAT 3 serotypes of Foot-and-Mouth Disease in pigs
Hye-Eun Jo(Hye-Eun Jo),Su-Hwa You(Su-Hwa You),Joo-Hyung Choi(Joo-Hyung Choi),Mi-Kyeong Ko(Mi-Kyeong Ko),Sung Ho Shin(Sung Ho Shin),Hyundong Jo(Hyundong Jo),Min Ja Lee(Min Ja Lee),Su-Mi Kim(Su-Mi Kim) 한국예방수의학회 2019 한국예방수의학회 학술대회자료집 Vol.2018 No.-