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Alignment-Dependent Ionization of CO_(2)in the Intense Laser Fields:Single-Active-Electron Approach

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Chinese Physics Letters 2013年第10期30卷 77-80页

作者： HU shi-lin ZHAO Zeng-Xiu shi Ting-Yun State Key Laboratory of Magnetic Resonance and Atomic and Molecular Physics Wuhan Institute of Physics and MathematicsChinese Academy of SciencesWuhan 430071 Department of Physics National University of Defense TechnologyChangsha 410073 University of the Chinese Academy of Sciences Beijing 100049

We perform Hartree–Fock calculations to obtain occupied orbitals for triatomic molecule CO_(2),based on one-center method and B-splines to deal with cusps and speed up *** the orbital energies and charge distribution are in good accordance with the reference *** valence orbital is propagated with single-active-electron approximation,and the alignment-dependent ionization yield peaks about 40°.However,there are discrepancies between our results and the experimental data,and many-electron effects may need to be exploited further to describe them.

关键词： convergence orbital Electron

Study of Variable Turbulent Prandtl Number Model for Heat Transfer to Supercritical Fluids in Vertical Tubes

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Journal of Thermal Science 2018年第3期27卷 213-222页

作者： TIAN Ran DAI Xiaoye WANG Dabiao shi lin Key Laboratory for Thermal Science and Power Engineering of Ministry of Education Department of Energy and Power Engineering Tsinghua University Department of Chemical Engineering Tsinghua University

In order to improve the prediction performance of the numerical simulations for heat transfer of supercritical pressure fluids, a variable turbulent Prandtl number(Pr_t) model for vertical upward flow at supercritical pressures was developed in this study. The effects of Pr_t on the numerical simulation were analyzed, especially for the heat transfer deterioration conditions. Based on the analyses, the turbulent Prandtl number was modeled as a function of the turbulent viscosity ratio and molecular Prandtl number. The model was evaluated using experimental heat transfer data of CO_2, water and Freon. The wall temperatures, including the heat transfer deterioration cases, were more accurately predicted by this model than by traditional numerical calculations with a constant Pr_t. By analyzing the predicted results with and without the variable Pr_t model, it was found that the predicted velocity distribution and turbulent mixing characteristics with the variable Pr_t model are quite different from that predicted by a constant Pr_t. When heat transfer deterioration occurs, the radial velocity profile deviates from the log-law profile and the restrained turbulent mixing then leads to the deteriorated heat transfer.

关键词： Turbulent Prandtl Number Supercritical Fluid Heat Transfer

Responsive Polymeric Nanoparticles for Biofilm-infection Control

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Chinese Journal of Polymer Science 2021年第11期39卷 1376-1391页

作者： lin-Zhu Su Yong Liu Yuan-Feng Li Ying-Li An lin-Qi shi State Key Laboratory of Medicinal Chemical Biology Key Laboratory of Functional Polymer MaterialsMinistry of EducationInstitute of Polymer ChemistryCollege of ChemistryNankai UniversityTianjin 300071China Engineering Research Center of Clinical Functional Materials and Diagnosis&Treatment Devices of Zhejiang Province Wenzhou InstituteUniversity of Chinese Academy of SciencesOujiang LaboratoryWenzhou 325000China

With the emergence of multidrug resistance(MDR)in many pathogens,bacterial infections are becoming a growing threat to public *** frightening scenario is due largely to the formation of biofilms,in which the bacteria are extremely recalcitrant to the conventional antibiotic *** address the emergence of MDR and biofilm-associated infections,numerous polymer-based materials have been designed and prepared *** subject of this perspective is the recent development of polymer-based materials that have been applied to combat multidrug-resistant pathogens,to prevent the formation of biofilms,or enhance the eradication efficacy to mature biofilms via killing biofilm-bacteria or dispersing *** advantages and shortcomings of these polymer-based materials are discussed,as well as the challenges we are facing in the clinical translation of these systems.

关键词： Antibacterial Biofilm Multidrug resistance Polymeric nanoparticles Stimuli-responsive

Bioinformatic identification of key candidate genes and pathways in axon regeneration after spinal cord injury in zebrafish

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Neural Regeneration Research 2020年第1期15卷 103-111页

作者： Jia-He Li Zhong-Ju shi Yan Li Bin Pan shi-Yang Yuan lin-lin shi Yan Hao Fu-Jiang Cao shi-Qing Feng Department of Orthopedics Tianjin Medical University General HospitalTianjinChina Department of Orthopedics the Affiliated Hospital of Xuzhou Medical UniversityXuzhouJiangsu ProvinceChina Tianjin Neurological Institute Key Laboratory of Post-Neuroinjury Neurorepair and Regeneration in Central Nervous SystemMinistry of Education and Tianjin CityTianjinChina

Zebrafish and human genomes are highly homologous;however,despite this genomic similarity,adult zebrafish can achieve neuronal proliferation,regeneration and functional restoration within 6–8 weeks after spinal cord injury,whereas humans *** analyze differentially expressed zebrafish genes between axon-regenerated neurons and axon-non-regenerated neurons after spinal cord injury,and to explore the key genes and pathways of axonal regeneration after spinal cord injury,microarray GSE56842 was analyzed using the online tool,GEO2R,in the Gene Expression Omnibus *** ontology and protein-protein interaction networks were used to analyze the identified differentially expressed ***,we screened for genes and pathways that may play a role in spinal cord injury repair in zebrafish and mammals.A total of 636 differentially expressed genes were obtained,including 255 up-regulated and 381 down-regulated differentially expressed genes in axon-regenerated *** Ontology and Kyoto Encyclopedia of Genes and Genomes enrichment results were also obtained.A protein-protein interaction network contained 480 node genes and 1976 node *** also obtained the 10 hub genes with the highest correlation and the two modules with the highest *** results showed that spectrin may promote axonal regeneration after spinal cord injury in *** growth factor beta signaling may inhibit repair after spinal cord injury in *** adhesion or tight junctions may play an important role in the migration and proliferation of some cells,such as Schwann cells or neural progenitor cells,after spinal cord injury in *** analysis identified key candidate genes and pathways in axonal regeneration after spinal cord injury in zebrafish,providing targets for treatment of spinal cord injury in mammals.

关键词： axonal regeneration differentially expressed genes focal adhesions Gene Ontology Kyoto Encyclopedia of Genes and Genomes neural regeneration protein-protein interaction network signaling pathway spectrin tight junctions transforming growth factor beta Wnt signaling pathway

Predicting the D_(s)(*)D_(s)(*)bound states as the partners of X(3872)

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Science Bulletin 2021年第13期66卷 1288-1295,M0003,M0004页

作者： Lu Meng Bo Wang shi-lin Zhu Ruhr-Universität Bochum Fakultät für Physik und AstronomieInstitut für Theoretische Physik IID-44780 BochumGermany Center of High Energy Physics Peking UniversityBeijing 100871China School of Physics and State Key Laboratory of Nuclear Physics and Technology Peking UniversityBeijing 100871China

In this work,we investigate the SU(3)flavor symmetry,heavy quark spin symmetry and their breaking effects in the di-meson *** prove the existence of the[D_(s)(*)D_(s)(*)]^(0++),[D_(s)(*)D_(s)(*)]^(1++),and[D_(s)(*)D_(s)(*)]^(1++)bound states as the consequence of two prerequisites in the SU(3)flavor symmetry and heavy quark spin *** first prerequisite,the X(3872)as the weakly D*D=DD*bound state is supported by its mass and decay branching *** second prerequisite,the existence of the DsDs[D_(s)(*)D_(s)(*)]^(0++)bound state is supported by the lattice QCD calculation and the observation of X_(c0)(3930)by the LHCb *** hope the future experimental analyses can search for these bound states in the B→[D_(s)(*)D_(s)(*)]h processes(h denotes the light hadrons).The[D_(s)(*)D_(s)(*)]^(0++)bound state is also expected to be reconstructed in the J/ψФinal state in the B→//ψФK decay.

关键词： SU(3)flavor symmetry Hadronic molecule Xe3872T Tetraquark

X（1835）： A Possible Baryonium？

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Communications in Theoretical Physics 2006年第2X期46卷 291-293页

作者： ZHU shi-lin GAO Chong-Shou Department of Physics Peking University Beijing 100871 China Research Center for Nuclear Physics Osaka University Japan

We point out that the large pp^- coupling of X（1835） and the suppression of the three-body strange final states strongly indicate that X（1835） may be a pp^- baryonium. We also point out that the branching ratio of X（1835） →ηππ should be bigger than that of X（1835） →η′ππ. We suggest BES search X（1835） in the ηππ channel Finally, X（1835） may be used a tetraquark generator if X（1835） is really established as a baryonium state.

关键词： baryonium new hadron states

Direct Electrochemistry Transfer and Electrocatalysis of Hemoglobin Immobilized in Porous Mn_2O_3

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Chemical Research in Chinese Universities 2011年第2期27卷 291-294页

作者： shi lin-pu GAO Qiu-ming School of Chemistry and Environment Beihang University Beijing 100191 P. R. China Shanghai Institute of Ceramics Chinese Academy of Sciences Shanghai 200050 P. R. China

Novel porous Mn2O3 with good crystallinity was synthesized via hard-template method. Hb-Mn2O3 na-nocomposite was prepared and used for biosensor construction. The Hb-Mn2O3-Nafion modified electrode shows fast direct electron transfer and displays good electrocatalytic response to the reduction of H2O2. The response time is less than 5 s, the sensitivity is as high as 493 μA·L·mmol-1·cm-2 in a linear range of 1-100 μmol/L, and the detection limit is 0.16 μmol/L. This modified electrode also shows good stability and reproducibility. This indicates that the porous Mn2O3 provides a good matrix for enzyme immobilization and biosensor construction.

关键词： Porous Mn203 Biosensor Direct electrochemistry Electrocatalysis Hemoglobin

Laser Flash Photolysis on Electron Transfer Reactions between 1,8-Dihydroxyanthraquinone with Adenine and Cytosine

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Chinese Journal of Chemical Physics 2013年第5期26卷 498-503,I0003页

作者： Xiang Liu lin Chen Qiao-hui Zhou Xiao-guo Zhou shi-lin Liu Hefei National Laboratory for Physical Sciences at the Microscale and Department of Chemical Physics University of Science and Technology of China Hefei 230025 China

Electron transfer （ET） reactions between 1,8-dihydroxyanthraquinone （DHAQ） and two DNA bases, adenine （A） and cytosine （C）, have been investigated in CH3CN/H20 solution with nanosecond time-resolved laser flash photolysis. After irradiation at 355 nm, the triplet DHAQ is produced via intersystem crossing and reacts with two nucleobases. ET processes for both reactions have been definitely identified, in which two bases play a significant role of electron donor. Based on the measured decay dynamics of various intermediates and the corresponding quenching rates, an initial ET process followed by a secondary proton-transfer reaction is suggested for both the overall reactions. By plotting the observed quenching rate against the concentration of two DNA bases, the bimolecular quenching rate constants are determined as 9.0-10s L/（mol.s） for the 3DHAQ＊＋C reaction and 3.3x10^8 L/（mol.s） for the 3DHAQ＊＋A reaction, respectively.

关键词： Electron transfer Proton transfer 1 8-dihydroxyanthraquinone Laser flashphotolysis Adenine Cytosine

Solvent Effect on the Photoinduced Electron Transfer Reaction Between Thioxanthen-9-one and Diphenylamine

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Chinese Journal of Chemical Physics 2015年第4期28卷 -页

作者： lin Chen Qiao-hui Zhou Xiang Liu Xiao-guo Zhou shi-lin Liu Hefei National Laboratory for Physical Sciences at the Microscale and Department of Chemical Physics University of Science and Technology of ChinaHefei 230026 China

Photoinduced chemical reaction between thioxanthen-9-one (TX) and diphenylamine (DPA) were investigated by the nanosecond laser flash photolysis. With photolysis at 355 nm, the triplet TX (3TX*) is produced via a Franck-Condon excitation and intersystem crossing. In the transient absorption spectra of the reduction of 3TX* by DPA in pure and aqueous CH3CN, four bands are clearly observed and assigned to absorption of 3TX*, TXH·, TX·− and DPA·+, respectively. With the increase of solvent polarity, the blue-shift was observed for all absorption bands of the intermediates. With the aid of dynamic decay curves, an electron transfer followed by a protonation process is confirmed for the reduction of 3TX* by DPA. The quenching rate constants of 3TX* by DPA very slightly decrease from 9.7×109 L/(mol·s) in pure CH3CN, to 8.7×109 L/(mol·s) in CH3CN:H2O (9:1), 8.0×109 L/(mol·s) in CH3CN:H2O (4:1) and 7.5×109 L/(mol·s) in CH3CN:H2O (1:1). Therefore water plays a minor role in the title reaction, and moreover no obvious medium effect of solvent polarity is observed for the electron transfer between 3TX* and DPA, indicating that the 3nπ* and 3ππ* states of TX have the approximate ability to attract an electron from DPA.

关键词： Electron transfer Protonation Reaction mechanism Absorption spectra Laser flash photolysis