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Identification of the Gene Products Responsible for F Plasmid Partitioning
KIM, SUNG0UK,NAGAI, KAZUO,TAMURA, GAKUZO,YU, JU-HYUN,BOK, SONG-HAE 한국미생물 · 생명공학회 1993 Journal of microbiology and biotechnology Vol.3 No.4
DNA subfragments, sopA, sopB and sopC which help to maintain the stability of an on C plasmid, were derived from a mini-F plasmid DNA (EcoRI restriction fragment f5) after digestion with restriction endonuclease, and cloned in the vector plasmid pBR322. The recombinant plasmids obtained were introduced into E. coli KY7231 and E. coli CSR603 strains, and proteins specified by the mini-F fragments were analysed by SDS-PAGE. Two proteins encoded by the F fragments were detected, and their molecular weights were 41,000 and 37,000 daltons. Fluorography after one and two dimensional gel electrophoresis of the lysates showed that these two proteins had been overproduced in the cells which were allowed to incorporate radioactive amino acid after plasmid amplification by chloramphenicol treatment. The isoelectric points of sopA and sopB proteins were 6.6 and 7.0, respectively.
음악과 수학 통합 활동이 유아의 공간능력 및 음악적성에 미치는 영향
김미영(Kim Mi-young),성연정(Sung Youn-Jung),홍혜경(Hong Hae-kyung) 한국열린유아교육학회 2009 열린유아교육연구 Vol.14 No.4
본 연구는 음악과 수학 통합 활동이 유아의 공간능력향상과 음악적성에 미치는 영향을 밝혀보기 위한 목적으로 수행하였다. 연구대상은 만 5세 유아 42명으로 실험집단과 비교집단에 무선 배정하였으며, 실험처치는 음악과 수학의 통합 활동을 16회 실시하였다. 실험집단은 음악과 수학의 통합 활동올 적용한 반면 비교집단은 음악과 수학의 분리된 활동을 적용하였다. 본 연구에서 사용한 검사도구는 Del Grande(1990)의 공간 능력 구성 체계를 기초로 홍혜경(2001)이 개발한 유아 공간 능력 검사도구와 Gordon(1979)이 개발한 음악적성 검사를 사용하였다. 두 집단의 사전검사와 사후검사 점수의 변화를 비교하기 위하여 공변량 분석을 실시하였으며 연구결과는 음악과 수학 통합 활동을 실시한 실험집단이 유아의 공간능력 항상과 음악적성에 긍정적인 영항을 미치는 것으로 나타났다. The purpose of this study was to find out the effects of Kindergarten music and mathematics activities on preschoolers' spatial abilities and the musical aptitude. The subjects were 42 five-year-old kindergarteners. They were randomly assigned to the experimental group and the comparative group. The experimental treatments were conducted 4 times a week for 4 weeks, with 16 activities in total. The kindergarteners of experimental group did mathematical activities integrated with music activities but the kindergarteners of the comparative group did mathematical activities separated from musk activities. This study used the preschooler's spatial ability test instrument developed by Hong Hae-Kyung(2001) based on Del Grande's spatial ability composition system(1990) musical aptitude test developed by Gordon(1979). It conducted covariance analysis to compare the changes of scores in the two groups between pretest and posttest. Consequently, it was found that the experimental group having integrated activity with music and mathematics showed improvement and positive effects in their spatial abilities and musical aptitude.
Lee, Sang Youp,Kim, Sang Hae 한국유전학회 2003 Genes & Genomics Vol.25 No.4
The genetic variation and the molecular discrimination of Scapharca species in Korea were investigated through the mitochondrial DNA sequence analyses. A partial portion (646 bp) of the mitochondrial cytochrome c oxidase subunit I gene (COI) for these species was analyzed by DNA sequencing and restriction fragment length polymorphism (RFLP). A sequence comparison and phylogenetic analysis showed both S. broughtonii and S. satowi formed a sister group, with then S. subcrenata clustered with the clade. It was assumed that all Scapharca species could form a monophyletic clade, with high bootstrap support (99%). In order to effectively discriminate the morphologically hard to classified spats, a PCR-RFLP diagnostic marker was developed with two restriction enzyme (HaeⅢ and HinfI) digestions. Digestion of the 646-bp fragments of the COI gene amplified from each species with HaeⅢ produced no fragment in the S. broughtonii, and two fragments, but of different sizes in S. satowi and S. subcrenata. In the HinfI digestion, two distinct fragments were produced in S. broughtonii and S. subcrenata, but no fragment in S. satowi. Twenty individuals from each population were digested by these two restriction enzymes, but no individual variations occurred.
Assessment of In Vitro Assay System for Thyroid HormoneDisruptors Using Rat Pituitary GH3 Cells
Hee Jin Kim1,Hae Young Park1,Jeonga Kim1,Il Hyun Kang2,Tae Sung Kim2,Soon Young Han2,Tae Seok Kang2,Kui Lea Park2,Hyung Sik Kim1 한국독성학회 2006 Toxicological Research Vol.22 No.4
The development of in vitro assays has been recommended to screening and test-ing the potential endocrine disruptors (EDs). These assay systems focus only on identifying thethe thyroid hormone (TH) disruptors. The aim of this study was to evaluate a test system to detectTH disruptors using rat pituitary tumor GH3 cells. The test system is based on the TH-dependentincrease in growth rate. As expected, L-3,5,3-triiodothyronine (T3) markedly induced a morphologicalchange in GH 3 cells from flattened fibroblastic types to rounded or spindle-shaped types. T3 stimu-lated GH3 cell growth in a dose-dependent manner with the maximum growth-stimulating effect9 M. In addition, T3 increased the release of growth hor-mone and prolactin into the medium of the GH3 cells culture. Using this assay system, the TH-dis-rupting activities of bisphenol A (BPA) and its related compounds were examined. BPA,dimethylbisphenol A (DMBPA), and TCI-EP significantly enhanced the growth of GH3 cells in therange of 1 × 10-5M to 1 × 10-6M concentrations. In conclusion, this in vitro assay system might bestandardization before it can be used as a broad-based screening tool.
The level of urinary aflatoxin M1 in Korean adults
Yong-Dae Kim1, Hyojin Kwon, Sun-In Moon, Sang-Yong Eom, Jung-Duk Park, Byung-Sun Choi, Seok-Joon Sohn, Young-Seoub Hong, Ho Kim, Ho-Jang Kwon, Ji-Ae Lim, Hae-Jung Yoon, Gwang-Jin Kim, Heon Kim 충북대학교 동물의학연구소 2012 Journal of Biomedical and Translational Research Vol.13 No.3
Competitive ELISA methods were used to measure the level of aflatoxin M1 (AFM1) from urine in 1008 Korean adults. Subjects were selected by random sampling in all areas of Korea, except Cheju-do. The recovery rate of AFM1 using this method was 105% (73-124%). The geometric mean of urinary AFM1 in all subjects was 3.43 pg/mL (3.67 ng/g creatinine). The level of AFM1 in males was statistically higher, compared with female subjects. However, the levels of AFM1 did not differ according to age. Subjects in Chungbuk-do showed the highest urinary AFM1 concentration, whereas subjects in Kyeongnam-do showed the lowest concentration. Assuming an excretion rate of 5%, this AFM1 excretion corresponds to approximately 0.1 microgram/day in Korean adults.
Lee, Dahae,Lee, Dong-Soo,Jung, Kiwon,Hwang, Gwi Seo,Lee, Hye Lim,Yamabe, Noriko,Lee, Hae-Jeong,Eom, Dae-Woon,Kim, Ki Hyun,Kang, Ki Sung The Korean Society of Ginseng 2018 Journal of Ginseng Research Vol.42 No.1
Background: The aim of the present study was to evaluate the potential protective effects of six ginsenosides (Rb1, Rb2, Rc, Rd, Rg1, and Rg3) isolated from Panax ginseng against tacrolimus (FK506)-induced apoptosis in renal proximal tubular LLC-PK1 cells. Methods: LLC-PK1 cells were treated with FK506 and ginsenosides, and cell viability was measured. Protein expressions of mitogen-activated protein kinases, caspase-3, and kidney injury molecule-1 (KIM-1) were evaluated by Western blotting analyses. The number of apoptotic cells was measured using an image-based cytometric assay. Results: Reduction in cell viability by $60{\mu}M$ FK506 was ameliorated significantly by cotreatment with ginsenosides Rg1 and Rb1. The phosphorylation of p38, extracellular signal-regulated kinases, and KIM-1, and cleavage of caspase-3, increased markedly in LLC-PK1 cells treated with FK506 and significantly decreased after cotreatment with ginsenoside Rb1. The number of apoptotic cells decreased by 6.0% after cotreatment with ginsenoside Rb1 ($10{\mu}M$ and $50{\mu}M$). Conclusion: The antiapoptotic effects of ginsenoside Rb1 on FK506-induced apoptosis were mediated by the inhibition of mitogen-activated protein kinases and caspase activation.
( Min Young Rim ),( Soo Yong Park ),( In Ku Yo ),( Min Su Ha ),( Ju Seung Kim ),( Ju Won Lee ),( Young Kul Jung ),( Dong Hae Chung ),( Oh Sang Kwon ),( Yun Soo Kim ),( Duck Joo Choi ),( Ju Hyun Kim1 ) 대한간학회 2012 춘·추계 학술대회 (KASL) Vol.2012 No.-
Background: Autoimmune hepatitis (AIH) is a progressive inflammatory liver disease of unknown etiology that is reported to be a consequence of aberrant autoreactivity. Several studies which reported the acute presentation of AIH have different clinical course and histologic features. In this study, we compared acute presentation of AIH and chronic presentation of AIH. Methods: We retrospectively reviewed the medical records of patients with autoimmune hepatitis from January 2003 to June 2011 at Gachon University, Gil Hospital. A total of 29 patients were enrolled, 7 patients were diagnosed with acute presentation of AIH. Results: There was no difference between two group in age, gender, and score system of AIH. Patients with acute presentation had higher serum levels of total bilirubin, lower serum levels of albumin in clinical feature (p<0.05), and higher frequency of zone 3 necrosis in histologic feature. The cumulative incidental rate of the normalization of serum AST and ALT levels with prednisolone treatment was similar between patients with acute presentation and chronic presentation in clinical course. Conclusions: Higher AST, ALT and, bilirubin were clinical specific feature, and zone 3 necrosis is a histological characteristic of autoimmune hepatitis with acute presentation.
[PE-0005] A White Waxy Hybrid Corn, ?Dodamchal? with Good Eating Quality
Sang-Woo Kim(Sang-Woo Kim),Jong Hyeong Lee(Jong Hyeong Lee),Byoung Rourl Choi(Byoung Rourl Choi),Eun Kyu Jang(Eun Kyu Jang),Young Rok Kim(Young Rok Kim),Hae Chan Jung(Hae Chan Jung),Jung-Hee Jang(Jung 한국육종학회 2022 한국육종학회 공동학술발표집 Vol.2022 No.-