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Photodynamics of Ga_(Zn)–V_(Zn) complex defect in Ga-doped ZnO

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Chinese Physics B 2018年第11期27卷 596-599页

作者： Ai-hua tang Zeng-Xia Mei Yao-Nan Hou Xiao-Long Du Key Laboratory for Renewable Energy Beijing National Laboratory for Condensed Matter PhysicsInstitute of PhysicsChinese Academy of SciencesBeijing 100190China School of Physical Sciences University of Chinese Academy of SciencesBeijing 100049China

The wide-band-gap II–VI compound semiconductor ZnO is regarded as a promising single-photon emission(SPE)host *** this work,we demonstrate that a(Ga_(Zn)–V_(Zn))^(-)complex defect can readily be obtained and the density can be controlled in a certain *** analogy to nitrogen vacancy centers,such a defect in ZnO is expected to be a new single photon *** optical properties of the(Ga_(Zn)–V_(Zn))^(-)complex defect are further studied by photoluminescence and time-resolved photoluminescence spectra *** electron transitions between the defect levels emit light at~650 nm with a lifetime of 10–20 nanoseconds,indicating a good coherent length for ***,a two-level emitter structure is proposed to explain the carrier *** believe that the photodynamics study of the(Ga_(Zn)–V_(Zn))^(-)complex defect in this work is important for ZnO-based quantum emitters.

关键词： (Ga_(Zn)-V_(Zn))-complex defect photoluminescence time-resolved photoluminescence

Tribological properties of Cu-based composites with S-doped NbSe_2

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Rare Metals 2015年第6期34卷 407-412页

作者： Bei-Bei Chen Shuai Chen Jin Yang Hong-Ping Li Shun Guo hua tang Chang-Sheng Li Institute for Advanced Materials School of Materials Science and Engineering Jiangsu University

In this study, S-doped NbSea （***.8） powders were fabricated, and the corresponding Cu-based composites （Cu/***1.8） were obtained by powder metallurgy technique. The phase compositions, physical, and tribological properties of Cu-based composites were investigated systematically. The results show that Cu matrix reacts with NbSo.2Sel.8 to produce Cu2Se and Cu0.38NbSo.2Se1.8 during sintering process, which influences the physical and tribological properties of Cu-based composites significantly. Specially, with NbS0.2Se1.8 content increasing, the density of Cu/ NbSo.2Se1.8 composites decreases, and the hardness increases firstly and then decreases, while the electric resistivity in- creases slightly. In addition, the incorporation of NbSo.2Se1.8 enhances the tribological properties of Cu greatly, which is attributed to the lubricating effect of Cuo,38NbSo.2Se1.8 and the reinforcement effect of Cu2Se. In particular, when the content of NbSo.2Sel.8 is 6 wt%, the Cu-based composite has the best tribological properties.

关键词： S-doped NbSe2 Cu-based composites Phasecomposition Friction Wear

Effect of scanning speed during PTA remelting treatment on the microstructure and wear resistance of nodular cast iron

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International Journal of Minerals,Metallurgy and Materials 2014年第4期21卷 363-370页

作者： hua-tang Cao Xuan-pu Dong Qi-wen huang Zhang Pan Jian-jun Li Zi-tian Fan State Key Laboratory of Materials Processing and Die & Mould Technology School of Materials Science and EngineeringHuazhong University of Science and Technology

The surface of nodular cast iron （NCI） with a ferrite substrate was rapidly remelted and solidified by plasma transferred arc （PTA） to induce a chilled structure with high hardness and favorable wear resistance. The effect of scanning speed on the microstructure, micro-hardness distribution, and wear properties of PTA-remelted specimens was systematically investigated. Microstructural characterization in-dicated that the PTA remelting treatment could dissolve most graphite nodules and that the crystallized primary austenite dendrites were transformed into cementite, martensite, an interdendritic network of ledeburite eutectic, and certain residual austenite during rapid solidifica-tion. The dimensions of the remelted zone and its dendrites increase with decreased scanning speed. The microhardness of the remelted zone varied in the range of 650 HV0.2 to 820 HV0.2, which is approximately 2.3-3.1 times higher than the hardness of the substrate. The wear re-sistance of NCI was also significantly improved after the PTA remelting treatment.

关键词： nodular cast iron surface treatment plasma arc remelting scanning speed microhardness wear resistance

Cluster Structure in Be Isotopes within Point-Coupling Covariant Density Functional

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Chinese Physics Letters 2013年第1期30卷 52-55页

作者： tang Zhong-hua LI Jia-Xing JI Juan-Xia ZHOU Tao School of Physical Science and Technology Southwest UniversityChongqing 400715

The potential energy surfaces and density distributions of ground states in even-mass Be isotopes are studied by using the point-coupling covariant density functional theory with the PC-F1 effective *** clustering structure is exhibited automatically in most of the Be *** results indicate that ^(6)Be has an α+2p clustering structure,while ^(8,10,14)Be have the 2αclustering ***α–αdistances and the corresponding quadrupole deformation parameters have a similar evolution trend against the neutron number.

关键词： interaction. structure. number.

Domain wall dynamics driven by a circularly polarized magnetic field in ferrimagnet:effect of Dzyaloshinskii-Moriya interaction

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Rare Metals 2022年第11期41卷 3815-3822页

作者： Ting-Ting Liu Yi-Fei Hu Yang Liu Zhe-Jun-Yu Jin Zheng-hua tang Ming-Hui Qin Guangdong Provincial Key Laboratory of Quantum Engineering and Quantum Materials and Institute for Advanced Materials South China Academy of Advanced OptoelectronicsSouth China Normal UniversityGuangzhou510006China School of Physics and Electronic and Electrical Engineering Xiangnan UniversityChenzhou423000China

In this work,we study the domain wall motion in ferrimagnet driven by a circularly polarized magnetic field using the collective coordinate theory and atomistic micromagnetic simulations,and we pay particular attention to the effect of Dzyaloshinskii-Moriya interaction(DMI).Similar to the case of antiferromagnetic domain wall,ferrimagnetic wall moves at a speed which is linearly dependent on the DMI *** addition,it is revealed that the DMI plays a role in modulating the domain wall dynamics similar to that of the net spin density,which suggests another internal parameter for controlling domain wall in ***,the results show that the domain wall dynamics in ferrimagnets is much faster than that in ferromagnets,which confirms again the great potential of ferrimagnets in future spintronic applications.

关键词： Domain wall dynamics Spintronics Circularly polarized magnetic field Ferrimagnets

lncRNA-SNHG15 accelerates the development of hepatocellular carcinoma by targeting mi R-490-3p/histone deacetylase 2 axis

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World Journal of Gastroenterology 2019年第38期25卷 5789-5799页

作者： Wei Dai Jia-Liang Dai Mao-hua tang Mu-Shi Ye Shuo Fang Department of Hepatobiliary Surgery the Affiliated Hospital of Guangdong Medical UniversityZhanjiang 524001Guangdong ProvinceChina Department of Infectious Disease the Second Affiliated Hospital of Guangdong Medical UniversityZhanjiang 524003Guangdong ProvinceChina Department of Surgery the Affiliated Hospital of Guangdong Medical UniversityZhanjiang 524001Guangdong ProvinceChina The Seventh Affiliated Hospital Sun Yat-sen UniversityShenzhen 518107Guangdong ProvinceChina Li KaShing Faculty of Medicine the University of Hong KongHong KongChina

BACKGROUND Hepatocellular carcinoma(HCC)has become a great threat for people’s *** long noncoding RNAs are involved in the pathogenesis of ***15,as a tissue specific long noncoding RNAs,has been studied in many human cancers,except *** To explore the regulatory mechanism of SNHG15 in *** In the present research,101 HCC patient samples,two HCC cell lines and one normal liver cell line were ***-qPCR and Western blot analysis were applied to detect SNHG15,miR-490-3p and histone deacetylase 2(HDAC2)*** regulatory mechanism of SNHG15 was investigated using CCK-8,Transwell and luciferase reporter *** Our research showed that up-regulation of SNHG15 was found in HCC and was related to aggressive behaviors in HCC ***,knockdown of SNHG15 restrained HCC cell proliferation,migration and *** addition,SNHG15 served as a molecular sponge for ***,miR-490-3p directly targets ***2 was involved in HCC progression by interacting with the SNHG15/miR-490-3p *** In conclusion,long noncoding RNA SNHG15 promotes HCC progression by mediating the miR-490-3p/HDAC2 axis in HCC.

关键词： SNHG15 miR-490-3p Hepatocellular carcinoma Histone deacetylase 2 Pathogenesis Regulatory mechanism

Axial length shortening in myopic children with Stickler syndrome after repeated low-level red-light therapy

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International Journal of Ophthalmology(English edition) 2023年第10期16卷 1712-1717页

作者： Xiang-hua tang Meng-Ting Yu Yin Hu Ming-Guang He Xiao Yang State Key Laboratory of Ophthalmology Zhongshan Ophthalmic CenterSun Yat-sen UniversityGuangdong Provincial Key Laboratory of Ophthalmology and Visual ScienceGuangdong Provincial Clinical Research Center for Ocular DiseasesGuangzhou 510060Guangdong ProvinceChina Centre for Eye Research Australia Royal Victorian Eye and Ear HospitalMelbourneVictoria 3004Australia Ophthalmology Department of SurgeryUniversity of MelbourneMelbourneVictoria 3004Australia

AIM:To report the myopia-controlling effect of repeated low-level red-light(RLRL)therapy in patients with Stickler syndrome(STL),an inherited collagenic disease typically presenting with early onset ***:Three STL children,aged 3,7,and 11y,received RLRL therapy throughout the follow-up period of 17,3,and 6mo,respectively after exclusion of fundus *** on best-corrected visual acuity(BCVA),intraocular pressure,cycloplegic subjective refraction,ocular biometrics,scanning laser ophthalmoscope,optical coherence tomography,genetic testing,systemic disease history,and family history were ***:At the initiation of the RLRL therapy,the spherical equivalent(SE)of 6 eyes from 3 patients ranged from-3.75 to-20.38 D,axial length(AL)were from 23.88 to 30.68 mm,and BCVA were from 0.4 to 1.0(decimal notation).Myopia progression of all six eyes slowed down after RLRL *** in five out of the six eyes shortened-0.07 to-0.63 *** side effects were ***:Three cases of STL whose progression of myopic shift and AL elongation are successfully reduced and even reversed after RLRL therapy.

关键词： Stickler syndrome axial length shortening myopia repeated low-level red-light therapy

Identification of BTG1 Status in Solid Cancer for Future Researches Using a System Review and Meta-analysis

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Current Medical Science 2020年第1期40卷 85-94页

作者： Xiu-qiong CHEN Fan-qiao MENG hua XIONG Ya-li WANG Wen-hua tang Yang-mei ZHOU Yan-mei ZOU Cancer Center Tongji HospitalTongji Medical CollegeHuazhong University of Science and TechnologyWuhan 430030China Tianjin Medical University Tianjin 300203China

Abundant studies have been conducted to identify how B-cell translocation gene 1 protein(BTG1)gene affects the differentiation,proliferation,metastasis of cancer cells,and how it further regulates the generation or development of diseases to influence the prognosis of ***,the data from single research were not powerful *** correlations between BTG1 expression and mechanisms of tumorigenesis or prognosis of patients are still in *** system review and meta-analysis provided a complete explanation about the association between BTG1 expression and clinicopathological features or prognosis of patients,which further laid a foundation for future research on *** eligible studies consisting of 1992 participants were *** uncovered that BTG1 expression in solid tumors was associated w让h lymph node status(RR=0.66,95%CI:0.58-0.75,P=0.142),TMN stage status(RR=2.13,95%CI:1.71-2.65,P=0.001),T category(RR=1.90,95%CI:1.20-3.00,P=0.000),histological differentiation(RR-1.91,95%CI:1.55-2.37,7=0.012),vascular invasion(RR=0.90,95%CI:0.57-1.41,P=0.001).BTG1 low expression was significantly associated with overall survival(OS)(HR=0.47,95%CI:0.38-0.67,P=0.000).It concluded that BTG1 possessed the potential value for future research and could be recommended as a significant biomarker in solid tumor.

关键词： solid tumor B-cell translocation gene 1 protein prognosis

An HBV-encoded miRNA activates innate immunity to restrict HBV replication

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Journal of Molecular Cell Biology 2020年第4期12卷 263-276页

作者： Xiaoqing Zhao Lu Sun Ting Mu Jianying Yi Chaoqun Ma Hong Xie Min Liu hua tang Tianjin Life Science Research Center Tianjin Key Laboratory of Inflammation BiologyCollaborative Innovation Center of Tianjin for Medical EpigeneticsDepartment of Pathogen BiologySchool of Basic Medical SciencesTianjin Medical UniversityTianjin 300070China Department of Laboratory Medicine General HospitalTianjin Medical UniversityTianjin 300070China

We previously identified that hepatitis B virus(HBV)encodes a microRNA(HBV-miR-3)that restrains HBV replication by targeting the HBV ***,whether HBV-miR-3 affects host innate immunity to modulate HBV replication remains ***,we examined the vital functions of HBV-miR-3 in the innate immune response after HBV *** found that HBV-miR-3 expression gradually increased in a dose-and time-dependent manner in HBV-infected HepG2-NTCP ***-miR-3 activated the JAK/STAT signaling pathway by downregulating SOCS5 in hepatocytes,thereby enhancing the IFN-induced anti-HBV *** addition,HBVmiR-3 in exosomes facilitated the Ml polarization of ***,exosomes containing HBV-miR-3 enhanced the secretion of IL-6 via inhibiting the SOCS5-mediated ubiquitination of *** short,these results demonstrate that HBV-miR-3 activates the innate immune response to restrain HBV replication by multiple pathways,which may suppress HBV-induced acute liver cell injury and affect the progression of persistent HBV infection.

关键词： hepatitis B virus HBV-miR-3 IFN M1 polarization IL-6