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석유화학 플랜트용 프로세스 펌프의 국산화율 제고 방안에 관한 연구
조원배,문승재,유호선,Cho, Won-Bae,Moon, Seung-Jae,Yoo, Hoseon 한국플랜트학회 2009 플랜트 저널 Vol.5 No.3
In this paper, the present condition for localization of process pumps and the enhancement method of the localization ratio of process pumps for refinery and chemical plant market were studied. The market of plant industry in the world has grown rapidly since 2000. However, the profit of domestic plant EPC compaies cound not have been increased as much as the market scale because they procured most of equipment from overseas. To make remarkable profit of plant EPC companies in the petrochemical industry, localization of equipments is required. Suitable equipment for localization is process pump applied API 610 standard. An purchased amount of pumps from overseas by domestic plant EPC companies in the last two years were 230 billion won. If process pumps are localized then an profit of plant EPC project will increase.
Yoo, Mi-Ae,LEE, Won-Ho,HA, Hye-Yeong,RYU, Jae-Ryeon,YAMAGUCHI, Masamitsu,FUJIKAWA, Kazuo,MATSUKAGE, Akio,KONDO, Sohei,NISHIDA, Yasuyoshi 부산대학교 유전공학연구소 1994 분자생물학 연구보 Vol.10 No.-
DNA polymerase β(pol β)cDNA of rat fused to an enhamcer-promoter ergion plus a poly(A) signal sequence of actin 5C gene of Drosophila(abbreviated polβ) was transferred to the Drosophila genome. Three of four constructed transgenic strains possessing transgene polβ on different chromosomes were studied. Levels of the polβ transcript and those of the polymerization activity of polβ were markedly elevated in cultured cells trans fected with polβ-bearing vectors as well as in embryos of the transgenic strains. The popular idea that DNA polymerase β participates in DNA repair was not supported by the observation that a pair of a normal and a polβ strain, and the other pair of a mei-9 mei-41(DNA-repair deficient double mutations) strain and a polβmei-9 mei-41 strain, showed no difference in survial within each pair after treatment with ultraviolet light, methylmethane sulfonate and mitomycin C. The other idea that DNA polymerase β participates in recombination was supported by the findings that spontaneous freauency of recombination, either meiotic or mitotic, is significantly higher in a transgenic polβstrain than in a non-transgenic strain. The enhanced recomdination frequency in the polβ strain may, however, reflect an indirect effect of over-produced polβ prteins on chromosomal stability. Whatever the direct effect of rat polβis, the transgenic polβ flies will be useful for study of the physiological role of polβ and the mechanism of recombination.
YOO, Bong-Ha,LEE, Beom-Han,KIM, Jin-Sung,KIM, Nam-Jae,KIM, Sung-Hoon,RYU, Ki-Won 경희대학교 동서의학연구소 2001 東西醫學硏究所 論文集 Vol.2001 No.-
Shikunshito-Kamiho (SKTK) is a traditional chinese medicine composed of eight crude drugs (Ginseng Radix, Hoelen, Atractylodis Rhizoma, Glycyrrhizae Radix, Prunellase Spica, Ostrease Testa, Laminaria Thallus, Sargassum). We investigated the effects of SKTK on pH, ammonia, fecal enzymes such as β-glucuronidase, tryptophanase, urease, and formation aberrant crypt foci in the colon carcinogenesis model induced by, 1,2-dimethylhydrazine (DMH). Water extract of SKTK was administered orally for 5 weeks to DMH-treated mice as 0.5% and 1.5% of the diet. β-Glucuronidase, pH and tryptophanase were significantly inhibited after treatment of 0.5% and 1.5% SKTK, while urease was significantly reduced only during and after treatment of 1.5% SKTK as compared with control data. However, the ammonia concentration wasn't different is SKTK treated groups from control group. The incidence number of aberrant crypts foci (ACF) and aberrant crypts/focus in colon was significantly decreased by 0.5% and 1.5% SKTK mixed diets compared with that in rats treated with DMH alone. These results suggest that SKTK exterts anticarcinogenic activity on experimental murine colorectal cancer.
Yoo, Jae-Hyuk,Park, Chan-Young,Kim, Jong-Cheol,Heo, Won-Do,Cheong, Mi-Sun,Park, Hyeong-Cheol,Kim, Min-Chul,Moon, Byeong-Cheol,Choi, Man-Soo,Kang, Yun-Hwan,Lee, Ju-Huck,Kim, Ho-Soo,Lee, Sang-Min,Yoon, Plant molecular biology and biotechnology research 2005 Plant molecular biology and biotechnology research Vol.2005 No.
Calmodulin (CaM), a ubiquitous calcium-binding protein, regulates diverse cellular functions by modulating the activity of a variety of enzymes and proteins. Plants express numerous CaM isoforms that exhibit differential activation and/or inhibition of CaM-dependent enzymes in vitro. However, the specific biological functions of plant CaM are not well known. In this study, we isolated a cDNA encoding a CaM binding transcription factor, MYB2, that regulates the expression of salt- and dehydration-responsive genes in Arabidopsis. This was achieved using a salt-inducible CaM isoform (GmCaM4) as a probe from a salt-treated Arabidopsis expression library. Using domain mapping, we identified a Ca^(2+)-dependent CaM binding domain in MYB2. The specific binding of CaM to CaM binding domain was confirmed by site-directed mutagenesis, a gel mobility shift assay, split ubiquitin assay, and a competition assay using a Ca^(2+)/CaM-dependent enzyme. Interestingly, the specific CaM isoform GmCaM4 enhances the DNA binding activity of AtMYB2, whereas this was inhibited by a closely related CaM isoform (GmCaM1). Overexpression of Gm-CaM4 in Arabidopsis up-regulates the transcription rate of AtMYB2-regulated genes, including the proline-synthesizing enzyme P5CS1 (△^(1)-pyrroline-5-carboxylate synthetase-1), which confers salt tolerance by facilitating proline accumulation. Therefore, we suggest that a specific CaM isoform mediates salt-induced Ca^(2+) signaling through the activation of an MYB transcriptional activator, thereby resulting in salt tolerance in plants.
Yoo, Jin-Cheol,Li, Hua,Lee, Won-Jae,Hong, Joon-Hee Korean Chemical Society 2010 Bulletin of the Korean Chemical Society Vol.31 No.11
Novel 4'-ethyl-5'-norcarbocyclic adenosine phosphonic acid analogues were synthesized from propionaldehyde 5 through a de novo acyclic synthetic route using reiterative Grignard additions and ring-closing metathesis (RCM) as key reactions. The synthesized nucleoside phosphonic acids analogues 17, 18, 19, and 21 were subjected to antiviral screening against human immunodeficiency virus.
Calix[4]pyrroles Bearing Pyrene-pickets at Diametrical Meso-positions with Amide Linkage
Yoo, Jae-Duk,Park, In-Won,Kim, Tae-Young,Lee, Chang-Hee Korean Chemical Society 2010 Bulletin of the Korean Chemical Society Vol.31 No.3
The synthesis and ion binding properties of calix[4]pyrrole bearing pyrene moieties appended to one side of the calix[4]pyrrole are reported. The key feature is the presence of flexible fluorescence arms attached to the calix[4]pyrrole ring in a cis-fashion. The preliminary solution phase anion and cation binding studies revealed that the systems can be in fact as viable sensors for anionic guest.
Yoo, Jin Young,Yang, Seung-Ho,Lee, Jung Eun,Cho, Deog Gon,Kim, Hoon Kyo,Kim, Sung Hwan,Kim, Il Sup,Hong, Jae Taek,Sung, Jae Hoon,Son, Byung Chul,Lee, Sang Won M. Nijhoff ; Kluwer Academic Publishers 2012 Journal of neuro-oncology Vol.109 No.2
<P>It remains unclear whether patients with non-small-cell lung cancer (NSCLC) develop brain metastasis during or after standard therapy. We attempted to identify biological markers that predict brain metastasis, and investigated how to modulate expression of such markers. A case-control study of patients who were newly diagnosed with NSCLC and who had developed brain metastasis during follow-up was conducted between 2004 and 2009. These patients were compared with a control group of patients who had NSCLC but no evidence of brain metastasis. Immunohistochemical analysis of expression of Ki-67, p53, Bcl-2, Bax, vascular endothelial growth factor, epidermal growth factor receptor, caspase-3, and E-cadherin was conducted. The methylation status of the genes for O(6)-methylguanine-DNA-methyltransferase, tissue inhibitor of matrix metalloproteinase (TIMP)-2, TIMP-3, and death-associated protein-kinase was also determined, by use of a methylation-specific polymerase chain reaction. A significantly increased risk of developing brain metastasis was associated with the presence of primary tumors with low E-cadherin expression in patients with NSCLC. We also investigated the effects of pioglitazone, a peroxisome proliferator-activated receptor γ-activating drug, in tumor-bearing mouse models. We found that E-cadherin expression was proportional to pioglitazone exposure time. Interestingly, pioglitazone pretreatment before cancer cell inoculation prevented loss of E-cadherin expression and reduced expression of MMP9 and fibronectin, compared with the control group. E-cadherin expression could be a predictor of brain metastasis in patients with NSCLC. Preventive treatment with pioglitazone may be useful for modulating E-cadherin expression.</P>
Yoo, Gyu Sang,Yu, Jeong Il,Park, Won,Huh, Seung Jae,Choi, Doo Ho The Korean Society for Radiation Oncology 2015 Radiation Oncology Journal Vol.33 No.4
Purpose: To identify prognostic factors for disease progression and survival of patients with extracranial oligometastatic breast cancer (EOMBC), and to investigate the role of radiation therapy (RT) for metastatic lesions. Materials and Methods: We retrospectively reviewed the medical records of 50 patients who had been diagnosed with EOMBC following standard treatment for primary breast cancer initially, and received RT for metastatic lesions, with or without other systemic therapy between January 2004 and December 2008. EOMBC was defined as breast cancer with five or less metastases involving any organs except the brain. All patients had bone metastasis (BM) and seven patients had pulmonary, hepatic, or lymph node metastasis. Median RT dose applied to metastatic lesions was 30 Gy (range, 20 to 60 Gy). Results: The 5-year tumor local control (LC) and 3-year distant progression-free survival (DPFS) rate were 66.1% and 36.8%, respectively. High RT dose (${\geq}50Gy_{10}$) was significantly associated with improved LC. The 5-year overall survival (OS) rate was 49%. Positive hormone receptor status, pathologic nodal stage of primary cancer, solitary BM, and whole-lesion RT (WLRT), defined as RT whose field encompassed entire extent of disease, were associated with better survival. On analysis for subgroup of solitary BM, high RT dose was significantly associated with improved LC and DPFS, shorter metastasis-to-RT interval (${\leq}1month$) with improved DPFS, and WLRT with improved DPFS and OS, respectively. Conclusion: High-dose RT in solitary BM status and WLRT have the potential to improve the progression-free survival and OS of patients with EOMBC.
Yoo, Bit-Na,Choi, Kui-Son,Jung, Kyu-Won,Jun, Jae-Kwan Asian Pacific Journal of Cancer Prevention 2012 Asian Pacific journal of cancer prevention Vol.13 No.1
Purpose: The purpose of this study was to identify the current status of the awareness and practice of breast self-examination (BSE) among Korean women. Materials and Methods: The study population was derived from the 2007 Korea National Cancer Screening Survey (KNCSS), an annual cross-sectional survey that uses a nationally representative random sample to investigate cancer-screening rates and related factors. A total of 1,255 Korean women aged ${\geq}30$ years participated in this study. Results: Of all participants, 88.0% reported that they had heard of BSE. The most common source of information on BSE was the media such as TV, radio and newspapers (87.0%). Recommendations from medical staff reached only 17.2%. The overall proportions of regular and irregular BSE were 13.2% and 16.1%, respectively. The main reason for not performing BSE was lack of knowledge about how to conduct the exam (31.7%). Conclusion: Despite a high level of awareness about BSE, only a small minority of women examine their breasts regularly in Korea.