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이정일(Jung Il Lee),박장환(Jang Hwan Park),김석동(Sok Dong Kim),안병옥(Byeong Ok Ahn),이승택(Seung Tack Lee) 한국약용작물학회 1993 한국약용작물학회지 Vol.1 No.1
This study was conducted to select thin-shelled and high-yielding lines in job`s-tears. Two breeding lines of Suwon 3 and Suwon 6 were selected from the local collections. These two lines were tested and investigated on their characteristics under the field condition. The heading date of Suwon 3 and Suwon 6 was later one or two days, but the maturity date was one or two days earlier than that of check variety Kim-jejong, respectively. The number of grains per hill of Suwon 3, Suwon 6 was 50%, 49% greater and the milling rate was 3.8%, 5.6% higher than that of check variety, respectively. Althought 1000 grain weight of Suwon 3 and Suwon 6 was 20g lighter and the rate of ripeness was 6%, 12% lower, the raw grain yield was 22%, 20% higher than that of check variety, respectively. The thickness of seed coat of Suwon 3 and Suwon 6 was thiner and the hardness of seed coat was lower than that of check variety, therefore the milling time was decreased 12%, 7% compare to check variety, respectively. The crude protein contents of Suwon 3 and Suwon 6 was slightly higher and the amino acid composition of Suwon 6 was similar to Kimjejong, but Suwon 3 was lower than that of check variety.
F-118 Establish the database for antibiotic resistance profile of TB isolates in Korea
( Dong Hyeok Kim ),( Seung-eun Song ),( Se-mi Jeon ),( Gil-soo Lee ),( Sung-kyeong Lee ),( Seong-han Kim ),( Jae-il Yoo ),( Dong Hyeok Kim ),( Jae-ok Kim ) 대한결핵 및 호흡기학회 2017 대한결핵 및 호흡기학회 추계학술대회 초록집 Vol.124 No.-
Rapid, accurate diagnosis of drug resistant-TB is critical for timely initiation of treatment and control of the disease. Since WHO endorsed commercial rapid drug susceptibility test (DST) to identify mutations conferring resistance to the anti-mycobacterial drugs, several discrepant cases between rapid and conventional DST results were reported. Therefore, analysis of the prevalence of mutations associated with drug-resistance is important to understanding the current status of DR-TB as well as treatment. In this study, we established the MIC distribution with 476 clinical isolates from drug resistant risk group, namely retreatment TB patients, and MDR patients in South Korea. And we determined the resistance pattern of the anti-mycobacterial drugs and frequencies of resistance-associated mutations by sequencing analysis with rpoB genes for RIF, katG, inhA, and ahpC genes for INH, gyrA and gyrB genes for moxifloxacin, and rrs for kanamycin. Our results showed that 96% and 89.9% of RIF and INH resistance was associated with rpoB and katG (89.9%), inhA (31%), and/or ahpC (4.4%) gene mutation. And 95.1% of MOX resistance was related with gyrA (63.4%) and gyrB (6.4%) gene mutation and 46% KAN resistance were associated with rrs gene. Among the antibiotics resistance related gene mutations, Ser-531 of rpoB (60.8%), Ser315Thr of KatG (68%), -15 promoter region of inhA (92.1%), and point mutation of 21Glu, 94Asp and 95Ser at gyrA gene were the predominant mutation sites. Our database would help the interpretation of DST results and developing new diagnostic test.
The Stablilty of Double-Capsulated Retinol In O/W Emulsion
( Dong-soon Park ),( Ok-sub Lee ),( Hak-hee Kang ),( Jong-il Kim ) 대한화장품학회 1997 대한화장품학회지 Vol.23 No.3
Using the all-trans-retinol which is double-capsulated with matrix (MDC®), we investigated its stability and the change of the epidermal thickness. The proprietary MDC® comprise two steps of capsulation of retinol, i.e., primary microcapsulation with collagen and then secondary capsulation with gellan gum. We compared the activity of a/htrans-retinol in varices forms such as (1) simply in OAV, (2) in W/O emulsion, (3) in primary capsu lated form in O/W emulsion, or (4)in MDC® in O/W emulsion. After storage at 45°C for 4 weeks, retinol in MDC® in O/W emulsion retained 92% of the activity compared to the standard material upon HPLC analysis, whereas the primary capsule gave 70%, the O/W emulsion form 47% and the W/O emulsion 78%. The retinol in MDC® in O/W induced the siginificant increase in epidermal thickness compared to the vehicle.
Kim, Nsm-Deuk,Kim, Seaho,Choi, Yung-Hyun,Im, Eun-Ok,Lee, Ji-Hyeon,Kim, Dong-Kyoo Korean Society of Life Science 2000 Journal of Life Science Vol.10 No.2
Trichostatin A (TSA) is a Streptomyces product, which inhibits the enzyme activity of histone deacetylase. It is also known as an inducer of apoptosis in several human cancer cell lines. In this study, we investigated the mechanism of apoptosis induced by TSA in MDA-MB-231 human breast carcinoma cells. The cytotoxicity of TSA on MDA-MB-231 cells was assessed by MTT assay. The cell viability was decreased dose-dependently and the IC\ulcorner value was about 100 ng/ml after 48 h treatment with TSA. Morphological change and DNA ladder formation, the biochemical hallmarks of apoptotic cell death, were observed after treatment of TSA in a concentration-dependent manner, which was accompanied with cleavage of poly(ADP-ribose) polymerase and $\beta$-catenin, and activation of caspase-3. TSA treatment up-regulated the expression of a cyclin-dependent kinase inhibitor p21 (Wafl/Cip1) protein, a key regulatory protein of the cell cycle. However, there is no detectable change of both Bcl-2 and Bax expressions. These results demonstrated that TSA might inhibit cell growth through apoptosis in human breast carcinoma MDA-MB-231 cells.
Kim, Ok-Mi,Kim, Hyun-Jeong,Kim, Dal-Sang,Park, Dong-Chul,Lee, Kap-Rang The Korean Society for Microbiology and Biotechnol 1995 Journal of microbiology and biotechnology Vol.5 No.5
The ddh gene encoding meso-diaminopimelate (meso-DAP)-dehydrogenase (DDH) in Brevibacterium lactofermentum was isolated by complementation of the Escherichia coli dapD mutation. It was supposed from subcloning experiments and complementation tests that the evidence for DDH activity appeared in about 2.5 kb Xhol fragmented genome. The 2.5 kb Xhol fragment containing the ddh gene was sequenced, and an open reading frame of 960 bp encoding a polypeptide comprising 320 amino acids was found. Computer analysis indicated that the deduced amino acid of the B. lactofermentum ddh gene showed a high homology with that of the Corynebacterium glutamicum ddh gene.
Gene Cloning and Characterization of a Cold-Adapted Esterase from Acinetobacter venetianus V28
( Kim Young Ok ),( Yu Li Heo ),( Hyung Kwoun Kim ),( Bo Hye Nam ),( Hee Jeong Kong ),( Dong Gyun Kim ),( Woo Jin Kim ),( Bong Seok Kim ),( Young Ju Jee ),( Sang Jun Lee ) 한국미생물 · 생명공학회 2012 Journal of microbiology and biotechnology Vol.22 No.9
Acinetobacter venetians V28 was isolated from the intestine of righteye flounder, Poecilopsetta plinthus caught in Vietnam seawater, and the esterase gene was cloned using a shotgun method, The amino acid sequence deduced from the nucleotide sequence (1,017bp) corresponded to a protein of 338 amino acid residues with a molecular weight of 37,186. The esterase had 87% and 72% identities with the lipases of A. junii SH205 and A. calcoaceticus RUH2202, respectively. The esterase contained a putative leader sequence, as well as the conserved catalytic triad (Ser, His, Asp), consensus pentapeptide GXSXG, and oxyanion hole sequence (HG). The protein from the strain V28 was produced in both a soluble and an insoluble form when the Escherichia coli cells harboring the gene were cultured at 18oC. The maximal activity of the purified enzyme was observed at a temperature of 40oC and pH 9.0 using p-NP-caprylate as substrate; however, relative activity still reached to 70% even at 5oC with an activation energy of 3.36 kcal/mol, which indicated that it was a cold-adapted enzyme. The enzyme was a nonmetalloprotein and was active against p-nitrophenyl esters of C4, C8, and C14. Remarkably, this enzyme retained much of its activity in the presence of commercial detergents and organic solvents. This cold-adapted esterase will be applicable as catalysts for reaction in the presence of organic solvents and detergents.