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Prussian Blue Analogues as Electrodes for Aqueous Monovalent Ion Batteries

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Electrochemical Energy Reviews 2022年第2期5卷 242-262页

作者： shen qiu Yunkai Xu Xianyong Wu Xiulei Ji Department of Chemistry Oregon State UniversityCorvallisOR 97331‑4003USA

Aqueous batteries have engendered increasing attention as promising solutions for stationary energy storage due to their potentially low cost and innate *** various aqueous battery systems,Prussian blue analogues(PBAs)represent a class of promising electrode materials with fascinating electrochemical performance,owing to their large open frameworks,abundant ion insertion sites,and facile *** date,PBAs have shown substantial progress towards storage of alkali metal ions(Li^(+),Na^(+),and K^(+)),H^(+),and NH4^(+) in aqueous electrolytes,which,however,has yet not been specifically *** review selects some representative research to introduce the progress of PBAs in these battery systems and aims to discuss the crucial role of ionic charge carrier in affecting the overall electrode ***,some critical knowledge gaps and challenges of PBA materials have been pointed out for future development.

关键词： Prussian blue analogues Aqueous batteries Monovalent ion storage

Optical investigation of topological semimetal SrMnSb_2

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Chinese Physics B 2019年第4期28卷 47-50页

作者： Zi-Yang qiu zhi-Yu Liao Xiang-Gang qiu Beijing National Laboratory for Condensed Matter Physics Institute of Physics Chinese Academy of Sciences School of Physical Sciences University of Chinese Academy of Sciences Collaborative Innovation Center of Quantum Matter

We investigate the temperature-dependent infrared spectroscopy of SrMnSb_2, which is a semimetal with multiple Fermi surfaces. A notable blue shift of the plasma minimum in reflectivity upon cooling indicates that the carrier density varies with temperature. In the real part of the optical conductivity σ_1(ω), a linearly-increased component which extrapolates to zero conductivity at finite frequency has been identified, which suggests dispersion of gapped Dirac band structures near the Fermi level. A two-Drude model, representing two different types of carriers, is introduced to describe the real part of optical conductivity. We separate the contributions of two-Drude model in dc conductivity, and demonstrate that the transport properties of SrMnSb_2 are mainly affected by the narrow-Drude quasiparticles. Compared with the similar phenomena observed in CaMnSb_2 and SrMnBi_2, we can infer that the two-Drude model is an appropriate approach to investigate the multiband materials in AMnSb_2 and AMnBi_2 families.

关键词： infrared spectroscopy topological material Drude mode

Parallel decline of CD8+CD38+ lymphocytes and viremia in treated hepatitis B patients

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World Journal of Gastroenterology 2011年第17期17卷 2191-2198页

作者： Wei Cao zhi-Feng qiu Tai-sheng Li Department of Infectious Diseases Peking Union Medical College Hospital Peking Union Medical College Chinese Academy of Medical Sciences Beijing 100730 China

AIM:To assess the peripheral T lymphocyte subsets in chronic hepatitis B virus(HBV) infection,and their dynamics in response to adefovir dipivoxil ***:Proportions and absolute counts of peripheral natural killer cells,B cells,CD8+,CD4+,CD8+ CD38+,CD8+CD28+ and CD4+CD28+ T cells were determined using three-color flow cytometry in chronic hepatitis B patients(n = 35),HBV carriers(n = 25) and healthy controls(n = 35).Adefovir dipivoxil was initiated in 17 chronic hepatitis B patients who were regularly followed for 72 wk,during which period the T cell subsets and serum viral load were measured at each follow-up ***:The peripheral CD4+ T cell counts and CD8+ T cell counts decreased in chronic HBV *** chronic hepatitis B patients,proportions of CD8+CD38+ T cells were 62.0% ± 14.7%,much higher than those of HBV carriers and healthy *** the 13 hepatitis B patients who were treated and responded to adefovir dipivoxil,proportions of CD8+CD38+ T cells decreased from 53.9% ± 18.4% pre-therapy to 20.1% ± 11.3% by week 72(P < 0.001),concomitant with viral load decline(HBV DNA fell from 7.31 to 3 log copies/mL).CD8+ T cell counts also underwent an average increase of 218 cells/μL by the end of 72-wk *** those who failed the therapy,the CD8+CD38+ T cell population had more ***:CD8+ T cells abnormally activated in chronic HBV infection can be partially reversed by antiviral ***-associated immune activation may be a crucial part of the pathogenesis and a promising target of treatment.

关键词： Hepatitis B virus Chronic hepatitis B CD8+CD38+ T cell subsets

Relativistic Density-Dependent Hartree Approach for Nuclear Matter in the Chiral-Symmetry-Breaking Model

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Chinese Physics Letters 1996年第6期13卷 416-419页

作者： JIANG Wei-zhou ZHU zhi-yuan qiu Xi-jun Shanghai Institute of Nuclear Research Chinese Academy of SciencesShanghai 201800 Department of Physics Shanghai UniversityShanghai 201800

A relativistic density-dependent Hartree approach in the chiral-symmetry-breaking field model has been developed for nuclear *** coupling constants of the relativistic Hartree-Lagrangian are made density dependence and obtained from the relativistic Brueckner-Bethe-Goldstone results of nuclear *** calculated saturation nuclear density,binding-energy and compressibility for nuclear matter are close to the empirical ones.

关键词： Hartree relativistic Chiral

Silicate-doped hydroxyapatite and its promotive effect on bone mineralization

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Frontiers of Materials Science 2013年第1期7卷 40-50页

作者： zhi-Ye qiu In-Sup NOH sheng-Min ZHANG Advanced Biomaterials and Tissue Engineering Center Huazhong University of Science and Technology Wuhan 430074 China Department of Materials Science and Engineering Tsinghua University Beijing 100084 China Department of Chemical and Biological Engineering Seoul National University of Science and Technology Seou1139743 Korea

Bone defect is one of the most common diseases in clinic. Existing therapeutic approaches have encountered many problems, such as lack of autogenous allogeneic bone and immunological rejection to allogeneic implant. Synthetic hydroxyapatite (HA) provided solutions for bone repair, since the HA is the main inorganic component of animals’ bone. However, HA has good biocompatibility, but does not possess osteogenic capability, which is of significance for modern bone repair materials. Si is an essential trace element in bone tissue, and it has been demonstrated to be able to promote bone formation. Therefore, silicate-doped hydroxyapatite (Si-HA) may serve as a promising material for bone repair, and promote bone regeneration in the repair. The current review discusses development of Si-HA, focusing on its preparation and characterization, in vitro and in vivo evaluations of the material, positive effect of Si-HA on promoting bone formation in clinical applications, and molecular mechanism investigation of such promotive effect.

关键词： silicate-doped hydroxyapatite (Si--HA) osteogenesis collagen biosyn-thesis bone mineralization

Recursive Dictionary-Based Simultaneous Orthogonal Matching Pursuit for Sparse Unmixing of Hyperspectral Data

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Transactions of Nanjing University of Aeronautics and Astronautics 2017年第4期34卷 456-464页

作者： Kong Fanqiang Guo Wenjun shen qiu Wang Dandan College of Astronautics Nanjing University of Aeronautics and Astronautics

The sparse unmixing problem of greedy algorithms still remains a great challenge at finding an optimal subset of endmembers for the observed data from the spectral library,due to the usually high correlation of the spectral *** such circumstances,a novel greedy algorithm for sparse unmixing of hyperspectral data is presented,termed the recursive dictionary-based simultaneous orthogonal matching pursuit(RD-SOMP).The algorithm adopts a block-processing strategy to divide the whole hyperspectral image into several *** each iteration of the block,the spectral library is projected into the orthogonal subspace and renormalized,which can reduce the correlation of the spectral *** RD-SOMP selects a new endmember with the maximum correlation between the current residual and the orthogonal subspace of the spectral *** endmembers picked in all the blocks are associated as the endmember sets of the whole hyperspectral ***,the abundances are estimated using the whole hyperspectral data with the obtained endmember *** can be proved that RD-SOMP can recover the optimal endmembers from the spectral library under certain *** results demonstrate that the RD-SOMP algorithm outperforms the other algorithms,with a better spectral unmixing accuracy.

关键词： hyperspectral unmixing greedy algorithm simultaneous sparse representation sparse unmixing

Enhanced MGMT expression contributes to temozolomide resistance in glioma stem-like cells

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Chinese Journal of Cancer 2014年第2期33卷 115-122页

作者： zhi-Kun qiu Dong shen Yin-sheng Chen Qun-Ying Yang Cheng-Cheng Guo Bing-Hong Feng Zhong-Ping Chen State Key Laboratory of Oncology in South China Department of Neurosurgery/Neuro-oncology Sun Yat-sen University Cancer Center Department of Pharmacology Guangdong Pharmaceutical University Department of Oncology The Affiliated Jiangyin Hospital of Southeast University Medical College

O6-methylguanine DNA methyltransferase(MGMT) can remove DNA alkylation adducts, thereby repairing damaged DNA and contributing to the drug resistance of gliomas to alkylating agents. In addition, glioma stem-like cells(GSCs) have been demonstrated to be involved in the recurrence and treatment resistance of gliomas. In this study, we aimed to investigate MGMT expression and regulatory mechanisms in GSCs and the association of MGMT with temozolomide(TMZ) sensitivity. GSCs were enriched from one MGMT-positive cell line(SF-767) and 7 MGMT-negative cell lines(U251, SKMG-4, SKMG-1, SF295, U87, MGR1, and MGR2) through serum-free clone culture. GSCs from the U251G, SKMG-4G, SF295G, and SKMG-1G cell lines became MGMT-positive, but those from the U87G, MGR1G, and MGR2G cell lines remained MGMT-negative. However, all the GSCs and their parental glioma cell lines were positive for nuclear factor-κB(NF-κB). In addition, GSCs were more resistant to TMZ than their parental glioma cell lines(P 0.05). When we treated the MGMT-positive GSCs with TMZ plus MG-132(an NF-κB inhibitor), the antitumor activity was significantly enhanced compared to that of GSCs treated with TMZ alone(P < 0.05). Furthermore, we found that MGMT expression decreased through the down-regulation of NF-κB expression by MG-132. Our results show that MG-132 may inhibit NF-κB expression and further decrease MGMT expression, resulting in a synergistic effect on MGMT-positive GSCs. These results indicate that enhanced MGMT expression contributes to TMZ resistance in MGMT-positive GSCs.

关键词：神经胶质瘤 MGMT 替莫唑胺干细胞耐药性 DNA甲基转移酶 NF-κB 核因子-κB

CALCULATION OF STABLY-STRATIFIED TURBULENT MIXING LAYERS WITH THE k-ε MODEL OF TURBULENT BUOYANT FLOW

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Journal of Hydrodynamics 1998年第4期10卷 100-105页

作者： shen, Yongming Wang, Yaling Liang, Chuan qiu, Dahong Dalian Univ of Technology Dalian China

Calculation of turbulent mixing layer flow subjected to strong stable stratification have been reported. The eddy viscosity and diffusivity coefficients were computed from a two-equation k-Ε turbulence model. The effect of buoyancy on turbulence can be considered at two levels. The first level is to include the buoyancy terms in governing equations. The second level is to compute the buoyancy influence by the Munk-Anderson formula. The model can be used to predict recirculating flows and complex process.

关键词： Buoyancy Computer simulation Flow of water Mathematical models Mixing

A high-order splitting scheme for the advection diffusion equation

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Journal of Environmental Sciences 2001年第4期13卷 444-448页

作者： ZHENG Yong-hong shen Yong-ming qiu Da-hong Guangzhou Institute of Energy Conversion the Chinese Academy of SciencesGuangzhou 510070China State Key Laboratory of Coastal and Offshore Engineering Dalian University of TechnologyDalian 116023China

A high-order splitting scheme for the advection-diffusion equation of pollutants is proposed in this paper. The multidimensional advection-diffusion equation is splitted into several one-dimensional equations that are solved by the scheme. Only three spatial grid points are needed in each direction and the scheme has fourth-order spatial accuracy. Several typically pure advection and advection-diffusion problems are simulated. Numerical results show that the accuracy of the scheme is much higher than that of the classical schemes and the scheme can he efficiently solved with little programming effort.

关键词： pollutants advecton-diffusion equation high-order scheme numerical modelling