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Ko, K. B.,Park, C. G.,Moon, T. H.,Ahn, Y. H.,Lee, J. K.,Ahn, K. H.,Park, J. H.,Yeom, I. T. IWA Publishing 2008 Water Science & Technology Vol.58 No.5
<P>One of the objectives of this study was to delineate the effect of nitrate on diethyl phthalate (DEP) oxidation by conducting a bench-scale ultraviolet (UV)/H2O2 and O3/H2O2 operations as suggested in a previous study. We also aim to investigate DEP oxidation at various UV doses and H2O2 concentrations by performing a pilot-scale advanced oxidation processes (AOP) system, into which a portion of the effluent from a pilot-scale membrane bioreactor (MBR) plant was pumped. In the bench-scale AOP operation, the O3 oxidation alone as well as the UV irradiation without H2O2 addition could be among the desirable alternatives for the efficient removal of DEP dissolved in aqueous solutions at a low DEP concentration range of 85±15 μg/L. The adverse effect in the UV/H2O2 process was significantly greater than that in the UV oxidation alone, and its oxidation was almost halved by the nitrate. However, the nitrate clearly enhanced the DEP oxidation in the O3 oxidation and O3/H2O2 process. Especially, the addition of nitrate almost doubled the DEP oxidation efficiency in the O3/H2O2 process. The series of pilot-scale AOP operations confirmed that about 30-50% of DEP dissolved in the treated MBR effluent streams was, at least, oxidized by the O3 oxidation alone as well as the UV irradiation without H2O2 addition. The UV photolysis of H2O2 was most effective for DEP degradation with an H2O2 concentration of 40 mg/L at a UV dose of 500 mJ/cm2.</P>
Kim, J.T.,Lee, S.J.,Kim, B.Y.,Lee, C.H.,Yeom, Y.I.,Choe, Y.K.,Yoon, D.Y.,Chae, S.K.,Kim, J.W.,Yang, Y.,Lim, J.S.,Lee, H.G. North-Holland Pub ; Elsevier Science Ltd 2013 FEBS letters Vol.587 No.22
Eukaryotic translation initiation factor 3 is composed of 13 subunits (eIF3a through eIF3m) and plays an essential role in translation. During apoptosis, several caspases rapidly down-regulate protein synthesis by cleaving eIF4G, -4B, -3j, and -2α. In this study, we found that the activation of caspases by cisplatin in T24 cells induces the cleavage of subunit G of the eIF3 complex (eIF3g). The cleavage site (SLRD<SUP>220</SUP>G) was identified, and we found that the cleaved N-terminus was translocated to the nucleus, activating caspase-3, and that it also showed a strong DNase activity. These data demonstrate the important roles of eIF3g in the translation initiation machinery and in DNA degradation during apoptosis.
Yeom, S.Y.,Jang, H.L.,Lee, S.J.,Kim, E.,Son, H.J.,Kim, B.G.,Park, C. North-Holland Pub ; Elsevier Science Ltd 2010 FEBS letters Vol.584 No.8
Previous studies have shown that testisin promotes malignant transformation in cancer cells. To define the mechanism of testisin-induced carcinogenesis, we performed yeast two-hybrid analysis and identified maspin, a tumor suppressor protein, as a testisin-interacting molecule. The direct interaction and cytoplasmic co-localization of testisin with maspin was confirmed by immunoprecipitation and confocal analysis, respectively. In cervical cancer cells, maspin modulated cell death and invasion; however, these effects were inhibited by testisin in parallel experiments. Of interest, the doxorubicin resistance was dramatically reduced by testisin knockdown (P=0.016). Moreover, testisin was found to be over-expressed in cervical cancer samples as compared to matched normal cervical tissues. Thus, we postulate that testisin may promote carcinogenesis by inhibiting tumor suppressor activity of maspin. Structured summary: MINT-7712215, MINT-7712176: Testisin (uniprotkb:Q9Y6M0) binds (MI:0407) to Maspin (uniprotkb:P36952) by pull down (MI:0096) MINT-7712188: Testisin (uniprotkb:Q9Y6M0) and Maspin (uniprotkb:P36952) colocalize (MI:0403) by fluorescence microscopy (MI:0416) MINT-7712115: Testisin (uniprotkb:Q9Y6M0) physically interacts (MI:0915) with Maspin (uniprotkb:P36952) by two-hybrid (MI:0018) MINT-7712162, MINT-7712128: Maspin (uniprotkb:P36952) physically interacts (MI:0915) with Testisin (uniprotkb:Q9Y6M0) by anti bait co-immunoprecipitation (MI:0006) MINT-7712147: Testisin (uniprotkb:Q9Y6M0) physically interacts (MI:0915) with Maspin (uniprotkb:P36952) by anti tag co-immunoprecipitation (MI:0007)
G. Y. Yeom,K. S. Min,박병재,S. W. Kim,S. K. Kang,S. H. Heo,H. S. Hwang,C. Y. Kang 한국물리학회 2008 THE JOURNAL OF THE KOREAN PHYSICAL SOCIETY Vol.53 No.3
HfO2 thin films were etched using an Ar/C4F8 inductively-coupled plasma (ICP) for high etch selectivity of HfO2/Si and the fluorocarbon remaining on the silicon surface after the HfO2 etching was removed by using an oxygen ICP and its effect was investigated. The etching of HfO2 using Ar/C4F8 magnetically-enhanced ICP (MEICP) improved the etch selectivity of HfO2/Si by more than three times, possibly due to the differences in the thicknesses of the fluorocarbon polymer layers formed on the surfaces of HfO2 and Si. In addition, the oxygen ICP treatment after the HfO2 thin film etching by using Ar/C4F8 ICP removed the polymer layer on the silicon surface effectively, so for the HfO2-nMOSFET (n-type metal-oxied-semiconductor-field-effect-transistors) devices, an improvement in drain current of more than 60 % could be observed after the O2 ICP treatment.
유가영(G Y. Yoo),강남현(N. H. Kang),정은정(J. E. Jung),홍재근(J. K. Hong),김정한(J. H. Kim),이종수,이진모(J. M. Lee),김남용(N. Y. Kim),염종택(J. T. Yeom) 한국소성가공학회 2011 한국소성가공학회 학술대회 논문집 Vol.2011 No.5
The ingot-breakdown process design of tower flange material (low-alloy steel) for offshore wind turbine was investigated with finite element (FE) simulation and experimental analysis. Based on the compression test results of the low-alloy steel, deformation processing map was generated using the superposition approach between the dynamic materials model (DMM) and Ziegler’s instability criteria. FE analysis was simulated to predict the deformed shape and the formation of forming defects during ingot breakdown process of tower flange. Finally, an optimum process design for producing a uniform low-alloy steel billet without forming defects was suggested.