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활성탄에 담지된 Co - Mo 계 촉매에서 티오펜과 유화수소의 승온탈착
임창도,문영환,문상진,김도완,임선기,박승빈 ( Chang Do Ihm,Young Hwan Moon,Sang Jin Moon,Do Woan Kim,Son Ki Ihm,Seung Bin Park ) 한국화학공학회 1995 Korean Chemical Engineering Research(HWAHAK KONGHA Vol.33 No.4
Temperature-programmed desorption(TPD) was carried out over the sulfided Mo/C, Co/C and Co-Mo/C catalysts, and heats of adsorption of thiophene and hydrogensulfide were obtained from TPD spectra by varying heating rate. It was studied the relationship between these heats of adsorption and the activity for hydrodesulfurization(HDS) of thiophene which was measured in a microflow reactor at atmospheric pressure and 3250. The synergistic HDS activity was well explained by correlating it with the difference in heat of adsorption between thiophene and hydrogensulfide.
임창임,김병모,문은이,홍다원,박종완,홍성희 한국유전체학회 2013 Genomics & informatics Vol.11 No.4
A radioresistant cell line was established by fractionated ionizing radiation (IR) and assessed by a clonogenic assay, flowcytometry, and Western blot analysis, as well as zymography and a wound healing assay. Microarray was performed to profileglobal expression and to search for differentially expressed genes (DEGs) in response to IR. H460R cells demonstratedincreased cell scattering and acidic vesicular organelles compared with parental cells. Concomitantly, H460R cells showedcharacteristics of increased migration and matrix metalloproteinase activity. In addition, H460R cells were resistant to IR,exhibiting reduced expression levels of ionizing responsive proteins (p-p53 and γ-H2AX); apoptosis-related molecules, suchas cleaved poly(ADP ribose) polymerase; and endoplasmic reticulum stress-related molecules, such as glucose-regulatedprotein (GRP78) and C/EBP-homologous protein compared with parental cells, whereas the expression of anti-apoptoticX-linked inhibitor of apoptosis protein was increased. Among DEGs, syntrophin beta 2 (SNTB2) significantly increased inH460R cells in response to IR. Knockdown of SNTB2 by siRNA was more sensitive than the control after IR exposure in H460,H460R, and H1299 cells. Our study suggests that H460R cells have differential properties, including cell morphology,potential for metastasis, and resistance to IR, compared with parental cells. In addition, SNTB2 may play an important role inradioresistance. H460R cells could be helpful in in vitro systems for elucidating the molecular mechanisms of and discoveringdrugs to overcome radioresistance in lung cancer therapy.
Genome-wide Response of Normal WI-38 Human Fibroblast Cells to 1,763 MHz Radiofrequency Radiation
임창임,김은혜,박애경,박웅양 한국유전체학회 2010 Genomics & informatics Vol.8 No.1
Increased exposure of human to RF fields has raised concerns for its potential adverse effects on our health. To address the biological effects of RF radiation, we used genome wide gene expression as the indicator. We exposed normal WI-38 human fibroblast cells to 1763 MHz mobile phone RF radiation at a specific absorption rate (SAR) of 60 W/kg with an operating cooling system for 24 h. There were no alterations in cell numbers or morphology after RF exposure. Through microarray analysis, we identified no differentially expressed genes (DEGs) at the 0.05 significance level after controlling for multiple testing errors with the Benjaminiochberg false discovery rate (BH FDR) method. Meanwhile, 82 genes were differentially expressed between RF-exposed cells and controls when the significance level was set at 0.01 without correction for multiple comparisons. We found that 24 genes (0.08%of the total genes examined) were changed by more than 1.5-fold on RF exposure. However, significant enrichment of any gene set or pathway was not observed from the functional annotation analysis. From these results, we did not find any evidence that non-thermal RF radiation at a 60-W/kg SAR significantly affects cell proliferation or gene expression in WI-38 cells.