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Zhang, Hao,Moon, Young-Kwon,Zhang, Xue-Quan,Liu, Jing-Sheng,Zhang, He-Xin,Yoon, Keun-Byoung Pergamon Press 2017 European polymer journal Vol.87 No.-
<P><B>Abstract</B></P> <P>A facile method for preparing polyethylene (PE)/octadecylamine-functionalized MoS<SUB>2</SUB> (ODA-MoS<SUB>2</SUB>) nanocomposites through in situ polymerization with an ODA-MoS<SUB>2</SUB>-MgCl-TiCl<SUB>4</SUB> catalyst was developed. The catalyst was synthesized simply by the treatment of ODA-MoS<SUB>2</SUB> with a Grignard reagent, followed by anchoring of a TiCl<SUB>4</SUB> catalyst. The resulting catalyst exhibited higher activity toward ethylene polymerization than did an ODA-MoS<SUB>2</SUB>-free catalyst. After polymerization, the resultant PE/ODA-MoS<SUB>2</SUB> nanocomposites reproduced the catalyst morphology, showing a flaked morphology. In addition, the thermal stability and mechanical properties of PE were significantly enhanced by the introduction of ODA-MoS<SUB>2</SUB> fillers. These properties could result from the good dispersion and strong interfacial adhesion of ODA-MoS<SUB>2</SUB> fillers and the PE matrix.</P> <P><B>Highlights</B></P> <P> <UL> <LI> PE/ODA-MoS<SUB>2</SUB> nanocomposites were successful synthesized through in-situ polymerization. </LI> <LI> The resultant nanocomposites had a layered morphology. </LI> <LI> The ODA-MoS<SUB>2</SUB> fillers well dispersed in the PE matrix with strong interfacial adhesion. </LI> <LI> The thermal stability and mechanical properties of PE were significantly enhanced with the addition of ODA-MoS<SUB>2</SUB>. </LI> </UL> </P> <P><B>Graphical abstract</B></P> <P>[DISPLAY OMISSION]</P>
Association of Six Susceptibility Loci with Prostate Cancer in Northern Chinese Men
Zhang, Yu-Rong,Xu, Yong,Yang, Kuo,Liu, Ming,Wei, Dong,Zhang, Yao-Guang,Shi, Xiao-Hong,Wang, Jian-Ye,Yang, Fan,Wang, Xin,Liang, Si-Ying,Zhao, Cheng-Xiao,Wang, Fei,Chen, Xin,Sun, Liang,Zhu, Xiao-Quan,Zh Asian Pacific Journal of Cancer Prevention 2012 Asian Pacific journal of cancer prevention Vol.13 No.12
Background/Aim: Six prostate cancer (PCa) susceptibility loci were identified in a genome-wide association study (GWAS) in populations of European decent. However, the associations of these 6 single-nucleotide polymorphisms (SNPs) with PCa has remained tobe clarified in men in Northern China. This study aimed to explore the loci associated with PCa risk in a Northern Chinese population. Methods: Blood samples and clinical information of 289 PCa patients and 288 controls from Beijing and Tianjin were collected. All risk SNPs were genotyped using polymerase chain reaction (PCR)-high resolution melting curve technology and gene sequencing. Associations between PCa and clinical covariates (age at diagnosis, prostate-specific antigen [PSA], Gleason score, tumor stage, and level of aggressiveness) and frequencies of alleles and genotypes of these SNPs were analyzed using genetic statistics. Results: Among the candidate SNPs, 11p15 (rs7127900, A) was associated with PCa risk (P = 0.02, odds ratio [OR] = 1.64, 95% confidence interval [CI] = 1.09-2.46). Genotypes showed differences between cases and controls on 11p15 (rs7127900, A), 11q13 (rs7931342, T), and HNF1B (rs4430796, A) (P = 0.03, P = 0.01, and P = 0.04, respectively). The genotype TG on 11q13 (rs7931342, T) was positively associated with an increased Gleason score (P = 0.04, OR = 2.15, 95% CI = 1.02-4.55). Patients carrying TG on 17q24 (rs1859962, G) were negatively associated with an increased body mass index (BMI) (P = 0.03, OR = 0.44, 95% CI = 0.21-0.92) while those with AG on HNF1B (rs4430796, A) were more likely to have PSA increase (P = 0.002). Conclusion: Our study suggests that 11p15 (rs7127900, A) could be a susceptibility locus associated with PCa in Northern Chinese. Genotype TG on 11q13 (rs7931342, T) could be related to an increased Gleason score, AG on HNF1B (rs4430796, A) could be associated with PSA increase, and TG on 17q24 (rs1859962, G) could be negatively associated with an increased BMI in Chinese men with PCa.
Zhang, Hao,Liu, Jing-Sheng,Zhang, He-Xin,Ko, Eun-Bin,Park, Jae-Hyeong,Moon, Young-Kwon,Shin, Byeong-Kwang,Zhang, Xue-Quan,Yoon, Keun-Byoung American Scientific Publishers 2018 Journal of Nanoscience and Nanotechnology Vol.18 No.4
<P>A facile coagglomeration method for preparing a long alkyl chain modified graphene oxide (MGO)/MgCl2-supported Ti-based Ziegler-Natta catalyst was reported. The effects of MGO on the catalyst morphology and activity for ethylene polymerization were examined. The resultant polyethylene (PE)/MGO nanocomposites exhibited a layered morphology, with the MGO fillers being well dispersed and exhibiting strong interfacial adhesion to the PE matrix. The thermal stability and mechanical properties of the PE were significantly enhanced with the introduction of a small amount of the MGO filler. Thus, this work provides a facile approach to the production of high-performance PE.</P>
Yong Zhang,Long-Zhen Xie,Chao-Xin Yuan,Chun-Lin Zhang,Su Liu,Ying-Quan Peng,Hai-Rong Li,Miao Zhang 성균관대학교(자연과학캠퍼스) 성균나노과학기술원 2016 NANO Vol.11 No.1
In this study, rose-like nickel oxide nanoparticles (diameter of 400–500 nm) were prepared on indium tin oxide (ITO) glass substrates by a simple electrodeposition in NiSO4·6H2O solution. Scanning electron microscopy (SEM), X-ray diffraction (XRD) and transmission electron microscope (TEM) were used for analysis of the NiO nanoparticles. The effects of operating temperature on the sensor response and the response versus gas concentration properties of the NiO nanorose-based sensors were investigated. We determined the operating temperature of the gas sensors to be 230℃, considering the proper sensitivity and a rapid response. In addition, gas-sensing characteristics of rose-like NiO nanoparticles to formaldehyde were investigated. It was shown that the sensors exhibited good response (Rg/Ra = 3.43) properties to formaldehyde gas at 230℃, making them to be promising candidates for practical detectors to formaldehyde gas.
Identification of a Cancer Stem-like Population in the Lewis Lung Cancer Cell Line
Zhang, An-Mei,Fan, Ye,Yao, Quan,Ma, Hu,Lin, Sheng,Zhu, Cong-Hui,Wang, Xin-Xin,Liu, Jia,Zhu, Bo,Sun, Jian-Guo,Chen, Zheng-Tang Asian Pacific Journal of Cancer Prevention 2012 Asian Pacific journal of cancer prevention Vol.13 No.3
Objective: Although various human cancer stem cells (CSCs) have been defined, their applications are restricted to immunocompromised models. Developing a novel CSC model which could be used in immunocompetent or transgenic mice is essential for further understanding of the biomolecular characteristics of tumor stem cells. Therefore, in this study, we analyzed murine lung cancer cells for the presence of CSCs. Methods: Side population (SP) cells were isolated by fluorescence activated cell sorting, followed by serum-free medium (SFM) culture, using Lewis lung carcinoma cell (LLC) line. The self-renewal, differentiated progeny, chemosensitivity, and tumorigenic properties in SP and non-SP cells were investigated through in vitro culture and in vivo serial transplantation. Differential expression profiles of stem cell markers were examined by RT-PCR. Results: The SP cell fraction comprised 1.1% of the total LLC population. SP cells were available to grow in SFM, and had significantly enhanced capacity for cell proliferation and colony formation. They were also more resistant to cisplatin in comparison to non-SP cells, and displayed increased tumorigenic ability. Moreover, SP cells showed higher mRNA expression of Oct-4, ABCG2, and CD44. Conclusion: We identified SP cells from a murine lung carcinoma, which possess well-known characteristics of CSCs. Our study established a useful model that should allow investigation of the biological features and pharmacosensitivity of lung CSCs, both in vitro and in syngeneic immunocompetent or transgenic/knockout mice.
Xin Caiyan,Wang Fen,Zhang Jinping,Zhou Quan,Liu Fangyan,Zhao Chunling,Song Zhangyong 한국미생물학회 2023 The journal of microbiology Vol.61 No.2
Candida spp. and Cryptococcus are conditional pathogenic fungi that commonly infect immunocompromised patients. Over the past few decades, the increase in antifungal resistance has prompted the development of new antifungal agents. In this study, we explored the potential antifungal effects of secretions from Serratia marcescens on Candida spp. and Cryptococcus neoformans. We confirmed that the supernatant of S. marcescens inhibited fungal growth, suppressed hyphal and biofilm formation, and downregulated the expression of hyphae-specific genes and virulence-related genes in Candida spp. and C. neoformans. Furthermore, the S. marcescens supernatant retained biological stability after heat, pH, and protease K treatment. The chemical profile of the S. marcescens supernatant was characterized by ultra-high-performance liquid chromatography–linear ion trap/orbitrap high resolution mass spectrometry analysis and a total of 61 compounds with an mzCloud best match of greater than 70 were identified. In vivo, treatment with the S. marcescens supernatant reduced the mortality of fungi-infected Galleria mellonella. Taken together, our results revealed that the stable antifungal substances in the supernatant of S. marcescens have promising potential applications in the development of new antifungal agents.