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Qian Sun,Lei Zhu,Ze-Da Meng,Kefayat Ullah,Shu Ye,오원춘 한국세라믹학회 2013 한국세라믹학회지 Vol.50 No.4
ACF and ZnO modified TiO2 composite materials (ZnO-ACF/TiO2) were prepared by a sol-gel method. The composites were characterized by X-ray diffraction (XRD), energy dispersive X-ray (EDX) analysis and scanning electron microscope (SEM) analysis. A methyl orange (MO) solution under visible light irradiation was used to determine the photocatalytic activity. The degradation of the MO was determined using UV spectrophotometers. An increase in the photocatalytic activity was observed and attributed to an increase of the photo-absorption effect by the ZnO and the cooperative effect of the ACF.
Sun, Qian,Zhu, Lei,Meng, Ze-Da,Ullah, Kefayat,Ye, Shu,Oh, Won-Chun The Korean Ceramic Society 2013 한국세라믹학회지 Vol.50 No.4
ACF and ZnO modified $TiO_2$ composite materials (ZnO-ACF/$TiO_2$) were prepared by a sol-gel method. The composites were characterized by X-ray diffraction (XRD), energy dispersive X-ray (EDX) analysis and scanning electron microscope (SEM) analysis. A methyl orange (MO) solution under visible light irradiation was used to determine the photocatalytic activity. The degradation of the MO was determined using UV spectrophotometers. An increase in the photocatalytic activity was observed and attributed to an increase of the photo-absorption effect by the ZnO and the cooperative effect of the ACF.
손천(Sun, Qian),김다예(Kim, Da-Yea),구소현(So-Hyeon),이한주(Lee, Han-Joo) 한국사회체육학회 2023 한국사회체육학회지 Vol.- No.93
Purpose: The purpose of this study is to analyze research and policy documents related to the protection of youth athletes using text mining analysis. Method: The study analyzed the abstracts on the protection of youth tahletes published in SCI/SSCI (N=1000) from 1996 to 2018. The data were analyzed using a topic modeling model with the LDA (Latent Dirichlet Allocation) algorithm. Results: First, the study identified several factors that pose a risk of human rights violations among youth athletes include self-harm, medical mismanagement, sexual harassment and abuse, neglect, and doping. Second, the topics of protective measures for prevention and response mainly include policy, systems and cooperation. Conclusion: This study presents a framework for classifying the threats to youth athletes, including wellestablished research topics such as self-harm, medical negligence, sexual harassment and abuse, as well as emerging research topics such as neglect and doping, indicaintg that the scope of research related to the protection of youth athletes is constantly expanding. Moreover, the study reveals that research topics related to protective and preventive measures mainly focus on p olicy, systems and cooperation, which is consistent with previous research findings
Mao, Chang-Fei,Qian, Wen-Yi,Wu, Jian-Zhong,Sun, Da-Wei,Tang, Jin-Hai Asian Pacific Journal of Cancer Prevention 2014 Asian Pacific journal of cancer prevention Vol.15 No.16
Background: The X-ray repair cross-complementing group 3 (XRCC3) is a highly suspected candidate gene for cancer susceptibility. Attention has been drawn upon associations of the XRCC3 Thr241Met polymorphism with breast cancer risk. However, the previous published findings remain controversial. Hence, we performed a meta-analysis to accurately evaluate any association between breast cancer and XRCC3 T241M (23, 812 cases and 25, 349 controls) in different inheritance models. Materials and Methods: PubMed and Web of Science databases were searched systematically until December 31, 2013 to obtain all the records evaluating the association between the XRCC3 Thr241Met polymorphism and breast cancer risk. Crude odds ratios (ORs) together with 95% confidence intervals (CIs) were used to assess the strength of associations. Results: When all eligible studies were pooled into the meta analysis of XRCC3 T241M polymorphism, a significantly increased breast cancer risk was observed in heterozygote comparison (OR=1.06, 95%CI=1.01-1.12). No significant associations were found in other models. In subgroup analysis, this polymorphism seemed to be associated with elevated breast risk in Asians. No publication bias was detected. Conclusions: This meta-analysis suggests that the T241M polymorphism confers a weakly increased breast cancer risk. A study with the larger sample size is needed to further evaluate gene-gene and gene-environment interactions of the XRCC3 T241M polymorphism with breast cancer risk.
New Therapeutic Schedule for Prostatic Cancer-3 Cells with ET-1 RNAi and Endostar
Zhang, Hao-Jie,Qian, Wei-Qing,Chen, Ran,Sun, Zhong-Quan,Song, Jian-Da,Sheng, Lu Asian Pacific Journal of Cancer Prevention 2014 Asian Pacific journal of cancer prevention Vol.15 No.23
Background: Endothelin-1 and Endostar are both significant for the progression, proliferation, metastasis and invasion of cancer. In this paper, we studied the effect of ET-1 RNAi and Endostar in PC-3 prostatic cancer cells. Materials and Methods: The lentiviral vector was used in the establishment of ET-1 knockdown PC-3 cells. Progression and apoptosis were assessed by CKK-8 and flow cytometry, respectively. Transwell assay was used to estimate invasion and signaling pathways were studied by Western blotting. Results: ET-1 mRNA and protein in ET-1 knockdown PC-3 cells were reduced to 26.4% and 22.4% compared with control group, respectively. ET-1 RNAi and Endostar both were effective for the suppression of progression and invasion of PC-3 cells. From Western blotting results, the effects of ET-1 regulation and Endostar on PC-3 cells were at least related to some signaling pathways involving PI3K/Akt/Caspase-3, Erk1/2/Bcl-2/Caspase-3 and MMPs (MMP-2 and MMP-9). Furthermore, combined treatment of ET-1RNAi and Endostar was found to be more effective than single treatment. Conclusions: Both ET-1 RNAi and Endostar can inhibit the progression and invasion of PC-3 cells, but combined treatment might be a better therapeutic schedule.
Laser Joining of Ti3Al-Based Alloy to Ni-Based Superalloy using a Titanium Interlayer
Xiao-Long Cai,Da-Qian Sun,Hong-Mei Li,Hong-Ling Guo,Yan Zhang,Ying-ying Che 한국정밀공학회 2018 International Journal of Precision Engineering and Vol.19 No.8
Joining Ti3Al-based alloy to Ni-based superalloy is of great interest for applications in the aerospace fields. Direct welding of these two materials was very difficult and the joint usually fractured during laser welding which cannot form an effective welding joint. In this work, a pure titanium interlayer with a thickness of 0.4 mm was used between the base metals. The results indicated that the addition of titanium interlayer has a great effect on the joint performance. No macrocracks were found through the whole joint. The average room-temperature tensile strength of the joint with titanium was 177 MPa which still much lower than the two base metals. The weak link of the dissimilar joint was the Ti3Al/weld interface. The presence of Ti2Ni, α2-Ti3Al and AlNi2Ti brittle intermetallic compounds in the Ti3Al/weld interface deteriorated the joint properties.
Hong-bo Zhang,Li-chao Sun,Li-da Zhi,Qian-kuan Wen,Zhi-wei Qi,Sheng-tao Yan,Wen Li,Guo-qiang Zhang 대한약학회 2017 Archives of Pharmacal Research Vol.40 No.10
Sepsis is a systemic inflammatory responsesyndrome caused by severe infections. Astilbin is a dihydroflavonolderivative found in many medicinal and foodplants with multiple pharmacological functions. To investigatethe effects of astilbin on sepsis-induced acute lunginjury (ALI), cecal ligation and puncture was performed onrats to establish a sepsis-induced ALI model; these ratswere then treated with astilbin at different concentrations. Lung injury scores, including lung wet/dry ratio, proteinleakage, myeloperoxidase activity, and inflammatory cellinfiltration were determined to evaluate the effects ofastilbin on sepsis-induced ALI. We found that astilbintreatment significantly attenuates sepsis-induced lunginjury and improves survival rate, lung injury scores, lungwet/dry ratio, protein leakage, myeloperoxidase activity,and inflammatory cell infiltration. Astilbin treatment alsodramatically decreased the production of inflammatorycytokines and chemokines in bronchoalveolar lavage fluid. Further, astilbin treatment inhibited the expression andproduction of macrophage inhibitory factor (MIF), whichinhibits the inflammatory response. Collectively, these datasuggest that astilbin has a protective effect against sepsisinducedALI by inhibiting MIF-mediated inflammatoryresponses. This study provides a molecular basis for astilbinas a new medical treatment for sepsis-induced ALI.
Shu Ye,Kefayat Ullah,Lei Zhu,Ze-Da Meng,Qian Sun,오원춘 한국세라믹학회 2013 한국세라믹학회지 Vol.50 No.4
Multiwalled carbon nanotubes (MWCNTs) modified with Pd and TiO2 composite catalysts were synthesized by the sol-gel method followed by solvothermal treatment at low temperature. The chemical composition and surface structure were characterized by X-ray diffraction (XRD), energy-dispersive X-ray (EDX) spectroscopy, scanning electron microscopy (SEM) and transmission electron microscopy (TEM). Photocatalytic recycle degradation experiments were carried out under both UV and visible light irradiation in the presence of MWCNT/TiO2 and Pd-MWCNT/TiO2 composites. As expected, the nanosized Pd-MWCNT/TiO2photocatalysts had enhanced activity over the non Pd treated MWCNT/TiO2 material in the degradation of a rhodamine B (Rh.B)solution. An increase in photocatalytic activity was observed and attributed to an increase in the photo-absorption effect by MWCNTs and the cooperative effect of Pd and TiO2 nanoparticles. According to the recycled results, the as-prepared Pd-MWCNT/TiO2 sample had a good effect on it.
Cho, Mi Suk,Park, Won Sun,Jung, Won-Kyo,Qian, Zhong-ji,Lee, Dae-Sung,Choi, Jung-Sik,Lee, Da-Young,Park, Sae-Gwang,Seo, Su-Kil,Kim, Hak-Ju,Won, Jun Yeon,Yu, Byeng Chul,Choi, Il-Whan Informa Healthcare USA, Inc. 2014 PHARMACEUTICAL BIOLOGY Vol.52 No.7
<P><I>Context</I>: Caffeic acid phenethyl ester (CAPE), an active component of honeybee propolis, is known to have antioxidant, anti-inflammatory, and other beneficial medicinal properties. However, the molecular mechanisms underlying its anti-allergic effects in mast cells are unknown.</P><P><I>Objective</I>: The purpose of the present study was to examine whether CAPE modulates the immunoglobulin E (IgE)-mediated local allergic reaction in animals, as well as to elucidate the effects of CAPE on mast cells <I>in vitro</I>.</P><P><I>Materials and methods</I>: To investigate the bioactive potential of CAPE (10 or 20 µM), HMC-1 cells were stimulated with phorbol 12-myristate 13-acetate plus calcium ionophore A23187 (PMACI) for 24 h in the presence or absence of CAPE. To study the pharmacological effects of CAPE, enzyme-linked immunosorbent assays (ELISAs), RT-PCR, Western blot analysis, electrophoretic mobility shift assays (EMSAs), and fluorescence assays were used.</P><P><I>Results</I>: CAPE (10 mg/kg) inhibited local IgE-mediated allergic reactions (0.164 versus 0.065 O.D.) in a mouse model. Additionally, CAPE (20 µM) attenuated PMACI-stimulated histamine release (3146.42 versus 2564.83 pg/ml) and the production of inflammatory cytokines, such as interleukin (IL)-1β (4.775 versus 0.713 pg/ml, IC<SUB>50</SUB> = 6.67 µM), IL-6 (4771.5 versus 449.1 pg/ml, IC<SUB>50</SUB> = 5.25 µM), and IL-8 (5991.7 versus 2213.1 pg/ml, IC<SUB>50</SUB> = 9.95 µM) in HMC-1 cells. In activated HMC-1 cells, pretreatment with CAPE decreased the phosphorylation of c-Jun N-terminal kinase. In addition, CAPE inhibited PMACI-induced nuclear factor (NF)-κB activation by suppressing IκBα phosphorylation and its degradation.</P><P><I>Discussion and conclusion</I>: Our results indicated that CAPE can modulate mast cell-mediated allergic disease.</P>