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Tunable oxygen defect density and location for enhancement of energy storage

Journal of Energy Chemistry 2021年第8期30卷 736-747,I0015页

作者： Jun Chen Jiangao Li ling Sun Zhong lin Zhengguang Hu Hongtao Zhang Xiaoling Wu Dongbo Zhang Guoan Cheng Ruiting Zheng Key Laboratory of Radiation Beam Technology and Materials Modification of the Ministry of Education College of Nuclear Science and TechnologyBeijing Normal University100875 BeijingChina Department of Physics Nanchang UniversityNanchang 330031China Department of Materials Loughborough UniversityLE113TU LeicestershireUK Beijing Computational Science Research Center 100193 BeijingChina

Defect engineering is in the limelight for the fabrication of electrochemical energy storage ***,determining the influence of the defect density and location on the electrochemical behavior remains ***,self-organized TiO_(2)nanotube arrays(TNTAs)are synthesized by anodization,and their oxygen defect location and density are tuned by a controllable post-annealing *** annealed at 600℃ in N2 exhibit the highest capacity(289.2 m Ah g^(-1)at 0.8 C)for lithium-ion storage,while those annealed at 900℃ in N2 show a specific capacitance of 35.6 m F cm^(-2)and stability above96%after 10,000 cycles for *** situ electron paramagnetic resonance spectra show that the surface-exposed oxygen defects increase,but the bulk embedded oxygen defects decrease with increasing annealing *** functional theory simulations reveal that a higher density of bulk oxygen defects corresponds to higher localized electrons states,which upshift the Fermi level and facilitate the lithium intercalation kinetic ***,differential charge density calculation indicates that the increase of surface oxygen defects in the anatase(101)plane leads to higher density excess electrons,which act as negative charge centers to enhance the surface potential for ion *** oxygen-deficient location and density tunable strategy introduce new opportunities for high-energy and high-power-density energy storage systems.

关键词： Oxygen defects Excess electrons Supercapacitors Lithium-ion batteries DFT calculations

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An Interfacial Dynamic Crosslinking Approach toward Catalyst-free and Mechanically Robust Elastomeric Vitrimer with a Segregated Structure

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Chinese Journal of Polymer Science 2021年第2期39卷 201-210,I0007页

作者： Yong Zhu Jing-Li Gao lin-Jun Zhang Yan Peng Hao Wang Fang-Wei ling Guang-Su Huang Jin-Rong Wu State Key Laboratory of Polymer Materials Engineering College of Polymer Science and EngineeringSichuan UniversityChengdu 610065China

Elastomeric vitrimers with covalent adaptable networks are promising candidates to overcome the intrinsic drawbacks of conventional covalently-crosslinked elastomers;however, most elastomeric vitrimers show poor mechanical properties and require the addition of exogenous catalysts. Herein, we fabricate a catalyst-free and mechanically robust elastomeric vitrimer by constructing a segregated structure of sodium alginate (SA) in the continuous matrix of epoxidized natural rubber (ENR), and further crosslinking the composite by exchangeable hydroxyl ester bonds at the ENR-SA interfaces. The manufacturing process of the elastomeric vitrimer is facile and environmentally friendly without hazardous solvents or exogenous catalysts, as the abundant hydroxyl groups of the segregated SA phase can act as catalyst to activate the crosslinking reaction and promote the dynamic transesterification reaction. Interestingly, the segregated SA structure bears most of the load owing to its high modulus and small deformability, and thus ruptures preferentially upon deformation, leading to efficient energy ***, the periodic stiffness fluctuation between rigid segregated SA phase and soft ENR matrix is beneficial to the crack-resisting. As a result,the elastomeric vitrimer manifests exceptional combination of catalyst-free, defect-tolerance, high tensile strength and toughness. In addition,the elastomeric vitrimer also exhibits multi-shape memory behavior which may further broaden its applications.

关键词： Tough Defect-tolerant Elastomeric vitrimer Interfacial dynamic crosslinks Segregated structure

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Cell–cell contact with proinflammatory macrophages enhances the immunotherapeutic effect of mesenchymal stem cells in two abortion models

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Cellular & Molecular Immunology 2019年第12期16卷 908-920页

作者： Yanhong Li Di Zhang ling Xu lin Dong Ji Zheng Yikong lin Jiefang Huang Yanyun Zhang Yu Tao Xingxing Zang Dajin Li Meirong Du Laboratory for Reproductive Immunology NHC Key Lab of Reproduction Regulation(Shanghai Institute of Planned Parenthood Research)Shanghai Key Laboratory of Female Reproductive Endocrine Related DiseasesHospital of Obstetrics and GynecologyFudan University Shanghai Medical CollegeShanghaiChina Department of Clinical Pharmacy Zhongshan HospitalFudan UniversityShanghaiChina Department of Immunology Medical College of Soochow UniversitySuzhouJiangsuChina Key Laboratory of Stem Cell Biology Institute of Health SciencesShanghai Jiao Tong University School of Medicine(SJTUSM)&Shanghai Institutes for Biological SciencesChinese Academy of SciencesShanghaiChina Department of Medicine Montefiore Medical CenterAlbert Einstein College of MedicineBronxNYUSA

Mesenchymal stem cells(MSCs),which are pluripotent cells with immunomodulatory properties,have been considered good candidates for the therapy of several immune disorders,such as inflammatory bowel diseases,concanavalin A-induced liver injury,and graft-versus-host *** embryo is a natural allograft to the maternal immune system.A successful pregnancy depends on the timely extinction of the inflammatory response induced by embryo implantation,followed by the switch to a tolerant immune microenvironment in both the uterus and the *** infiltration of immune cells and serious inflammatory responses are triggers for embryo rejection,which results in ***,we demonstrated that adoptive transfer of MSCs could prevent fetal loss in a lipopolysaccharide(LPS)-induced abortion model and immune response-mediated spontaneous abortion *** immunosuppressive MSCs alleviated excessive inflammation by inhibiting CD4+T cell proliferation and promoting the decidual macrophage switch to M2 in a tumor necrosis factor-stimulated gene-6(TSG-6)-dependent ***-tocell contact with proinflammatory macrophages increased the TSG-6 production by the MSCs,thereby enhancing the suppressive regulation of T cells and ***,proinflammatory macrophages in contact with the MSCs upregulated the expression of CD200 on the stem cells and facilitated the reprogramming of macrophages towards an anti-inflammatory skew through the interaction of CD200 with CD200R on proinflammatory ***,the results demonstrate that a TSG-6-mediated paracrine effect,reinforced by cell-to-cell contact between MSCs and proinflammatory macrophages,is involved in the mechanism of MSC-mediated abortion relief through the induction of immune *** study also indicates the potential application of MSCs in clinical recurrent miscarriages.

关键词： inflammatory effect thereby

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Study on the mechanism of hydrodesulfurization of tetrahydrothiophene catalyzed by nickel phosphide

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Petroleum Science 2022年第3期19卷 1390-1400页

作者： Chuan-Tao Zhu Li-Qiang Zhang Mei-ling Zhou Xin-Wei Wang Zheng-Da Yang Ri-Yi lin De-Wei Yang College of New Energy China University of PetroleumQingdao266580China

Hydrodesulfurization(HDS)reaction can significantly reduce the viscosity and sulfur content of heavy oil,while the HDS reaction mechanism of tetrahydrothiophene as the main sulfide in heavy oil is still *** HDS experiment of tetrahydrothiophene catalyzed by nickel phosphide(Ni_(2)P)is carried out at 200-300°*** results indicate that the H_(2)S production under the catalysis of Ni_(2)P increases obviously within 200-250°*** main gas products of HDS reaction are butane,butene and H_(2)***,the mechanism of tetrahydrothiophene catalyzed by Ni_(2)P is analyzed based on Density Functional Theory(DFT).It is revealed that the adsorption model is most stable when tetrahydrothiophene is vertically adsorbed on the V-Ni-Hcp1 site of Ni_(2)P(001).The C-S bond is elongated and the C-C bond is shortened after ***(HYD)is the most possible reaction route of tetrahydrothiophene on Ni_(2)P(001)*** are two routes with the lowest activation energy,which are C_(4)H_(8)S→C_(4)H_(8)SH^(*)→C_(4)H_(9)SH^(*)→C_(4)H_(10)+H_(2)S and C_(4)H_(8)S→C_(4)H9S^(*)→C_(4)H_(9)^(*)+SH^(*)→C_(4)H_(10)+H_(2)*** and H_(2)S are produced in the reaction,corresponding to the experimental *** study provides a basis for understanding of the HDS mechanism of tetrahydrothiophene catalyzed by Ni_(2)P.

关键词： Tetrahydrothiophene Nickel phosphide Hydrodesulfurization Hydrogen sulfide DFT

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A New Silicon-Based Ferroelectric Sandwich Structure

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Chinese Physics Letters 2001年第1期18卷 132-133页

作者： REN Tian-ling ZHANG lin-Tao LIU Li-Tian LI Zhi-Jian Institute of Microelectronics Tsinghua UniversityBeijing 100084

A new silicon-based PbTiO_(3)/Pb(Zr_(0.53)Ti_(0.47))O_(3)/PbTiO_(3) sandwich structure is fabricated by a sol-gel *** with other fabrication processes without PbTiO_(3) buffer layers,the annealing temperature is greatly reduced by as much as 100℃.Capacitance-voltage,polarization-electric field and dielectric-frequency properties of this sandwich structure are *** Pb(Zr_(x)Ti_(1-x))O_(3) films are proved to have good dielectric and ferroelectric properties.

关键词： properties. sandwich method.

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An Efficient Rice Mutagenesis System Based on Suspension-Cultured Cells

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Journal of Integrative Plant Biology 2013年第2期55卷 122-130页

作者： Yuan-ling Chen Hui-lin Liang Xing-Liang Ma Su-lin Lou Yong-Yao Xie Zhen-Lan Liu Le-Tian Chen Yao-Guang Liu State Key Laboratory for Conservation and Utilization of Subtropical Agro-bioresources College of Life Sciences South China Agricultural University

Plant mutants are important bio-resources for crop breeding and gene functional studies. Conventional methods for generating mutant libraries by mutagenesis of seeds with physical or chemical agents are of low efficiency. Here, we developed a highly-efficient ethyl methanesulfonate （EMS） mutagenesis system based on suspension-cultured cells, with rice （Oryza sativa L.） as an example. We show that treatment of suspension-cultured tiny cell clusters with 0.4% EMS for 18-22 h followed by differentiation and regeneration produced as high as 29.4% independent mutant lines with visible phenotypic variations, including a number of important agronomic traits such as grain size, panicle size, grain or panicle shape, tiller number and angle, heading date, male sterility, and disease sensitivity. No mosaic mutant was observed in the mutant lines tested. In this mutant library, we obtained a mutant with an abnormally elongated uppermost internode. Sequencing and functional analysis revealed that this is a new allelic mutant of eui （elongated uppermost internode） caused by two point mutations in the first exon of the EUI gene, representing a successful example of this mutagenesis system.

关键词： Rice mutagenesis EMS suspension cell culture mutant.

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Antibacterial activity and mechanism of newly developed Zr-30Ta and Zr-25Ta-5Ti alloys against implant-associated infection

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Rare Metals 2022年第12期41卷 4176-4187页

作者： Hai-lin Yang Akram Nasser Juaim ling Zou Meng-Zhen Zhu Xiao-Na Chen Chen-Xu Ma Xiong-Wen Zhou State Key Laboratory of Powder Metallurgy Central South UniversityChangsha 410083China National Clinical Research Center for Geriatric Disorders Xiangya HospitalCentral South UniversityChangsha 410008China Department of Prosthodontics Center of StomatologyXiangya HospitalCentral South UniversityChangsha 410008China Department of Prosthodontics Faculty of DentistryThamar UniversityDharmarYemen Department of Oral Implantology Xiangya Stomatological Hospital and School of StomatologyCentral South UniversityChangsha 410008China

Infection is a common problem after implantation,and the currently used Ti-based implants have insufficient antibacterial *** newly developed Zr-30Ta and Zr-25Ta-5Ti alloys exhibited good mechanical properties,low elastic moduli,and high corrosion *** this work,their antibacterial activities and antibacterial mechanisms were *** surface roughness,wettability,and charge of the alloys were evaluated using a profilometer,drop shape analyzer,and electrokinetic analyzer,*** antibacterial activity against Streptococcus mutans and Porphyromonas gingivalis was investigated using the inhibition zone assay,plate count assay,live/dead staining,and scanning electron microscopy(SEM).The reactive oxygen species release(ROS)was evaluated using the 2’7’-dichlorodihydrofluorescein diacetate(DCFH-DA)*** results demonstrated that Zr-30Ta and Zr-25Ta-5Ti alloys had favorable smooth,hydrophilic,negatively charged surfaces that decreased bacteria adhesion and prevented biofilm ***-30Ta and Zr-25Ta-5Ti alloys also exhibited a time-dependent decrease in the bacteria adhesion and ***-30Ta and Zr-25Ta-5Ti alloys were also found to induce direct membrane damage and increase ROS production,resulting in significantly better antibacterial activities than ***-30Ta and Zr-25Ta-5Ti alloys exhibited comparable antibacterial *** work suggests that the newly developed Zr-30Ta and Zr-25Ta-5Ti alloys have good antibacterial activity against Streptococcus mutans and Porphyromonas gingivalis and are promising candidate materials for dental and orthopedic implants.

关键词： Zirconium-tantalum Dental implant Antibacterial Peri-implant infection Biofilm

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Pharmacodynamic Mechanism of Kuanxiong Aerosol for Vasodilation and Improvement of Myocardial Ischemia

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Chinese Journal of Integrative Medicine 2022年第4期28卷 319-329页

作者： LU Yan YANG Mei-ling SHEN A-ling lin Shan PENG Mei-zhong WANG Tian-yi LU Zhu-qing WANG Yi-lian PENG Jun CHU Jian-feng Academy of Integrative Medicine Fujian University of Traditional Chinese MedicineFuzhou350122China Chen Keji Academic Thought Inheritance Studio Fujian University of Traditional Chinese MedicineFuzhou350122China Fujian Key Laboratory of Integrative Medicine on Geriatrics Fujian University of Traditional Chinese MedicineFuzhou350122China Department of Acupuncture and Moxibustion Third People’s Hospital Affiliated to Fujian University of Traditional Chinese MedicineFuzhou350122China

Objective: To explore the effect of Kuanxiong Aerosol(KXA)on isoproterenol(ISO)-induced myocardial injury in rat ***: Totally 24 rats were radomly divided into control,ISO,KXA low-dose and high-dose groups according to the randomized block design method,and were administered by intragastric administration for 10 consecutive days,and on the 9th and 10th days,rats were injected with ISO for 2 consecutive days to construct an acute myocardial ischemia model to evaluate the improvement of myocardial ischemia by *** addition,the diastolic effect of KXA on rat thoracic aorta and its regulation of ion channels were tested by in vitro vascular tension *** influence of KXA on the expression of calcium-CaM-dependent protein kinase Ⅱ(CaMK Ⅱ)/extracellular regulated protein kinases(ERK)signaling pathway has also been ***: KXA significantly reduced the ISO-induced increase in ST-segment,interventricular septal thickness,cardiac mass index and cardiac tissue pathological changes in ***,the relaxation of isolated thoracic arterial rings that had been precontracted using norepinephrine(NE)or potassium chloride(KCl)was increased after KXA treatment in an endothelium-independent manner,and was attenuated by preincubation with verapamil,but not with tetraethylammonium chloride,4-aminopyridine,glibenclamide,or barium *** pretreatment attenuated vasoconstriction induced by CaCl_(2)in Ca^(2+)-free solutions containing K^(+) or *** addition,KXA pretreatment inhibited accumulation of Ca^(2+)in A7r5 cells mediated by KCl and NE and significantly decreased p-CaMK Ⅱ and p-ERK ***: KXA may inhibit influx and release of calcium and activate the CaMK Ⅱ/ERK signaling pathway to produce vasodilatory effects,thereby improving myocardial injury.

关键词： Kuanxiong Aerosol myocardial ischemia vasodilation Ca^(2+) CaMKⅡ/ERK pathway

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A multiple-dose pharmacokinetics of polyethylene glycol recombinant human interleukin-6 (PEG-rhIL-6) in rats

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Journal of Zhejiang University-Science B(Biomedicine & Biotechnology) 2011年第1期12卷 32-39页

作者： Xue-ling HE Hai-lin YIN Jiang WU Ke ZHANG Yan LIU Tao YUAN Hai-lin RAO Liang LI Guang YANG Xue-mei ZHANG Institute of Biomedical Engineering West China Center of Medical Sciences Sichuan University Chengdu 610041 China Laboratory Animal Center of Sichuan University Chengdu 610041 China Chengdu Institute of Biological Products China National Biotic Group (CNBG) Chengdu 610023 China

Radiation therapy has been widely applied in cancer ***,it often causes thrombocytopenia (deficiency of white blood cells) as an adverse *** human interleukin-6 (rhIL-6) has been found to be a very effective way against this thrombocytopenia,but IL-6 has low stability in blood,which reduces its *** increases the stability and half-life of rhIL-6,it was modified by polyethylene glycol (PEG).The pharmacokinetics and the tissue distribution of PEG-rhIL-6 labeled with 125I were examined after subcutaneous injection in *** pharmacokinetic pattern of PEG-rhIL-6 was defined with linear-kinetics,and we fitted a one-compartment model with half-lives of 10.44–11.37 h (absorption,t1/2Ka) and 19.77–21.53 h (elimination,t1/2Ke),and peak concentrations at 20.51–21.96 h (tpeak) in ***-lives and tpeak of PEG-rhIL-6 were longer than those of rhIL-6 previously *** the present study,for deposition of PEG-rhIL-6 in rats,the tissue distribution examination showed that blood was the major organ involved,rather than ***,as to the elimination of PEG-rhIL-6,the major organ was the *** excretion fraction of the injection dose recovered from urine was 23.32% at 192 h after subcutaneous *** than 6% of PEG-rhIL-6 was eliminated via the feces at 192 *** results indicate that PEG-rhIL-6 is a good candidate drug formulation for patients with cancer.

关键词： Polyethylene glycol Recombinant human interleukin-6 Pharmacokinetics Rat

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重点行业烟气脱硫脱硝除尘装备运行效果评价指标体系研究

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标准科学 2016年第4期 24-29页

作者：黄进林翎高翔朱廷钰吴学成付志明郭旸旸闫晓淼中国标准化研究院浙江大学热能工程研究所中科院过程工程研究所

当前日益严峻的大气污染物控制形势和节能减排相关产业政策要求的日趋严格,对重点行业开展烟气脱硫脱硝除尘装备运行效果评价工作提出了迫切需求。本文从分析当前我国火电和钢铁行业大气污染物排放及控制装备运行现状入手,论述了研制重... 详细信息

当前日益严峻的大气污染物控制形势和节能减排相关产业政策要求的日趋严格,对重点行业开展烟气脱硫脱硝除尘装备运行效果评价工作提出了迫切需求。本文从分析当前我国火电和钢铁行业大气污染物排放及控制装备运行现状入手,论述了研制重点行业烟气脱硫脱硝除尘装备运行效果评价技术要求系列国家标准的必要性和紧迫性,阐述了相关评价标准的编制思路和原则;重点介绍了燃煤烟气脱硫脱硝装备和钢铁烧结烟气除尘装备运行效果评价指标体系的建立,以及定性评价要求和定量评价指标要求,借此推动我国重点行业大气污染物控制装备运行效果评价机制的建设,以标准化手段促进我国重点行业大气污染物控制装备运行可靠性和有效性的提升。

关键词：运行效果评价

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