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“Zero‑Strain” NiNb_(2)O_(6) Fibers for All‑Climate Lithium Storage

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Nano-Micro Letters 2025年第1期17卷 348-360页

作者： yan Zhao qiang Yuan Liting yang Guisheng Liang Yifeng Cheng Limin Wu Chunfu Lin Renchao Che College of Physics Donghua UniversityShanghai 201620People’s Republic of China School of Materials Science and Engineering Institute of Materials for Energy and EnvironmentQingdao UniversityQingdao 266071People’s Republic of China Laboratory of Advanced Materials Shanghai Key Laboratory of Molecular Catalysis and Innovative MaterialsAcademy for Engineering&TechnologyFudan UniversityShanghai 200438People’s Republic of China Zhejiang Laboratory Hangzhou 311100People’s Republic of China Inner Mongolia University Hohhot 010021People’s Republic of China

Niobates are promising all-climate Li^(+)-storage anode material due to their fast charge transport,large specific capacities,and resistance to electrolyte ***,their moderate unit-cellvolume expansion(generally 5%–10%)during Li^(+)storage causes unsatisfactory long-term ***,“zero-strain”NiNb_(2)O_(6) fibers are explored as a new anode material with comprehensively good electrochemical *** Li^(+)storage,the expansion of electrochemical inactive NiO_(6) octahedra almost fully offsets the shrinkage of active NbO_(6) octahedra through reversible O *** superior volume-accommodation capability of the NiO_(6) layers guarantees the“zero-strain”behavior of NiNb_(2)O_(6) in a broad temperature range(0.53%//0.51%//0.74%at 25//−10//60℃),leading to the excellent cyclability of the NiNb_(2)O_(6) fibers(92.8%//99.2%//91.1%capacity retention after 1000//2000//1000 cycles at 10C and 25//−10//60℃).This NiNb_(2)O_(6) material further exhibits a large reversible capacity(300//184//318 mAh g−1 at 0.1C and 25//−10//60℃)and outstanding rate performance(10 to 0.5C capacity percentage of 64.3%//50.0%//65.4%at 25//−10//60℃).Therefore,the NiNb_(2)O_(6) fibers are especially suitable for large-capacity,fast-charging,long-life,and all-climate lithium-ion batteries.

关键词： NiNb_(2)O_(6)porous fiber “Zero-strain”mechanism Electrochemical property Harsh-temperature operation Operando characterization

Human-induced pluripotent stem cell-derived neural stem cell exosomes improve blood-brain barrier function after intracerebral hemorrhage by activating astrocytes via PI3K/AKT/MCP-1 axis

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Neural Regeneration Research 2025年第2期20卷 518-532页

作者： Conglin Wang Fangyuan Cheng Zhaoli Han Bo yan Pan Liao Zhenyu Yin Xintong Ge Dai Li Rongrong Zhong qiang Liu Fanglian Chen Ping Lei Department of Geriatrics Tianjin Medical University General HospitalTianjinChina School of Medicine Nankai UniversityTianjinChina Tianjin Neurological Institute TianjinChina

Cerebral edema caused by blood-brain barrier injury after intracerebral hemorrhage is an important factor leading to poor ***-induced pluripotent stem cell-derived neural stem cell exosomes(hiPSC-NSC-Exos)have shown potential for brain injury repair in central nervous system *** this study,we explored the impact of hiPSC-NSC-Exos on blood-brain barrier preservation and the underlying *** results indicated that intranasal delivery of hiPSC-NSC-Exos mitigated neurological deficits,enhanced blood-brain barrier integrity,and reduced leukocyte infiltration in a mouse model of intracerebral ***,hiPSC-NSC-Exos decreased immune cell infiltration,activated astrocytes,and decreased the secretion of inflammatory cytokines like monocyte chemoattractant protein-1,macrophage inflammatory protein-1α,and tumor necrosis factor-αpost-intracerebral hemorrhage,thereby improving the inflammatory *** sequencing indicated that hiPSC-NSC-Exo activated the PI3K/AKT signaling pathway in astrocytes and decreased monocyte chemoattractant protein-1 secretion,thereby improving blood-brain barrier *** with the PI3K/AKT inhibitor LY294002 or the monocyte chemoattractant protein-1 neutralizing agent C1142 abolished these *** summary,our findings suggest that hiPSC-NSC-Exos maintains blood-brain barrier integrity,in part by downregulating monocyte chemoattractant protein-1 secretion through activation of the PI3K/AKT signaling pathway in astrocytes.

关键词： AKT astrocyte blood-brain barrier cerebral edema exosomes human-induced pluripotent stem cells intracerebral hemorrhage neural stem cells neuroinflammation PI3K

酸性饲粮对东方蜜蜂微孢子虫繁殖与蜜蜂免疫力的影响

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福建农林大学学报（自然科学版） 2025年第1期54卷 117-124页

作者：魏秀秀陈雅黄强江西农业大学蜜蜂研究所江西农业大学动物科学技术学院江西南昌330045

【目的】研究酸性饲粮对东方蜜蜂微孢子虫繁殖和意大利蜜蜂免疫力的影响,验证酸性饲粮是否能够防治蜜蜂微孢子虫疾病,为在养蜂中合理使用酸性饲料提供科学依据。【方法】以意大利蜜蜂为研究对象,选取400只新出房蜜蜂,随机分为4组,分别... 详细信息

【目的】研究酸性饲粮对东方蜜蜂微孢子虫繁殖和意大利蜜蜂免疫力的影响,验证酸性饲粮是否能够防治蜜蜂微孢子虫疾病,为在养蜂中合理使用酸性饲料提供科学依据。【方法】以意大利蜜蜂为研究对象,选取400只新出房蜜蜂,随机分为4组,分别为对照组、微孢子虫组、微孢子虫+柠檬酸组(含50 g·L^(-1)柠檬酸)和微孢子虫+醋酸组(含400 mL·L^(-1)醋酸),每组100只,检测并分析感染后第1天和第3天免疫基因的相对表达量,统计分析感染7 d后蜜蜂体内微孢子虫数量和蜜蜂存活率。【结果】4个试验组之间的存活率差异极显著(P0.05)。在微孢子虫组中,蜜蜂感染3 d内检测到11个免疫基因的相对表达量未显著下降(P>0.05),但酸性饲粮处理组中的部分免疫基因PGRPSC4300和Abaecin的表达量显著下降(P<0.05)。【结论】含有50 g·L^(-1)柠檬酸和400 mL·L^(-1)醋酸的饲粮无法抑制微孢子虫繁殖,也不能提高蜜蜂免疫力和存活率,不适用于治疗蜜蜂微孢子虫病。

关键词：东方蜜蜂微孢子虫意大利蜜蜂酸性饲粮免疫基因存活率

Life-cycle assessment and techno-economic analysis of the production of wood vinegar from Eucommia stem: a case study

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Frontiers of Chemical Science and Engineering 2023年第8期17卷 1109-1121页

作者： Ji-Lu Zheng ya-Hong Zhu yan-yan Dong Ming-qiang Zhu College of Forestry Northwest A&F UniversityYangling 712100China College of Mechanical and Electronic Engineering Northwest A&F UniversityYangling 712100China Institute of Environment and Sustainable Development in Agriculture Chinese Academy of Agricultural SciencesBeijing 100081China

This research undertook a case study of the life-cycle assessment and techno-economic analysis of the slow pyrolysis of Eucommia stem for the production of wood vinegar and activated *** results showed that the production of one ton of wood vinegar via the slow pyrolysis of Eucommia stem show comparatively low global warming potential(2.37×10^(2) kg CO_(2) eq),primary energy demand(3.16×10^(3) MJ),acidification potential(2.19 kg SO2 eq),antimony depletion potential(3.86×10^(–4) kg antimony eq),and ozone depletion potential(7.46×10^(–6) kg CFC-11 eq)and was more environmentally friendly than the production of dilute acetic acid(12 wt%)via petrochemical ***,the total capital investment,total product cost,and cash flowsheet were provided in the techno-economic ***,the net present value,internal rate of return,and dynamic payback period of the production process were *** findings indicated that while this production process is cost-effective,it might not be economically attractive or could generate investment *** increase in the added value of the wood vinegar and the activated carbon could remarkably improve the economic feasibility of this production process.

关键词： life-cycle assessment techno-economic analysis wood vinegar activated carbon Eucommia

Numerical investigations on mechanical characteristics and failure mechanism of outwash deposits based on random meso-structures using discrete element method

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Journal of Central South University 2017年第12期24卷 2894-2905页

作者： ZHANG qiang XU Wei-ya LIU Qin-ya SHEN Jun-liang yan Long Key Laboratory of Geomechanics and Embankment Engineering of Ministry of Education(Hohai University) Research Institute of Geotechnical Engineering Hohai University China Institute of Water Resources and Hydropower Research Department of Physics University of Toronto

Outwash deposit is a unique type of geological materials, and its features such as heterogeneity, discontinuity and nonlinearity determine the complexity of mechanical characteristics and failure mechanism. In this work, random meso-structure of outwash deposits was constructed by the technique of computer random simulation based on characteristics of its meso-structure in the statistical sense and some simplifications, and a series of large direct shear tests on numerical samples of outwash deposits with stone contents of 15%, 30%, 45% and 60% were conducted using the discrete element method to further investigate its mechanical characteristics and failure mechanism under external load. The results show that the deformation characteristics and shear strength of outwash deposits are to some extent improved with the increase of stone content, and the shear stress–shear displacement curves of outwash deposits show great differences at the post-peak stage due to the random spatial distribution and content of stones. From the mesoscopic view, normal directions of contacts between "soil" and "stone" particles undergo apparent deflection as the shear displacement continues during the shearing process, accompanying redistribution of the magnitude of contact forces during the shearing process. For outwash deposits, the shear zone formed after shear failure is an irregular stripe due to the movements of stones near the shear zone, and it expands gradually with the increase of stone content. In addition, there is an approximately linear relation between the mean increment of internal friction angle and the stone content lying between 30% and 60%, and a concave nonlinear relation between the mean increment of cohesion and stone content, which are in good agreement with the existing research results.

关键词： outwash deposits random meso-structures discrete element method numerical tests mechanical characteristics failure mechanism

Research progress of nanoparticles reinforced composite filler metal

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Journal of Iron and Steel Research International 2024年第10期31卷 2365-2377页

作者： Shi-yan Xie ya-qiong Ge Ming-zhu You Guan-xing Zhang yan-hong Guo Er-qiang Liu College of Materials Science and Engineering Taiyuan University of Science and TechnologyTaiyuan030024ShanxiChina State Key Laboratory of Advanced Brazing Filler Metals&Technology Zhengzhou Research Institute of Mechanical Engineering Co.Ltd.Zhengzhou450001HenanChina College of Applied Science Taiyuan University of Science and TechnologyTaiyuan030024ShanxiChina

Composite filler metal refers to the traditional filler metal by adding a certain proportion of various forms of superalloy,carbon fiber and ceramic particles as reinforcement *** to the addition of the reinforcement phase,the filler metal can have a suitable thermal expansion coefficient,which can effectively reduce the residual stress at the brazing joint caused by the different thermal expansion coefficients of the base metal and improve the comprehensive performance of the brazing *** recent years,with the progress of science and technology,the research on nanomaterials has been deepening,and nanomaterials are widely used in the modification of composite filler metals because of their special surface effect,small size effect,quantum size effect and macroscopic quantum tunneling *** modification performance of different composite solders by nanoparticles in recent years is reviewed,the advantages and disadvantages of nano-reinforced composite solders are analyzed,and the future research direction of composite solders is prospected.

关键词： Metal nanoparticle Metal oxide nanoparticle Carbon-based nanomaterial Brazing Composite filler metal

Increasing the Content of β Phase of Poly(9,9-dioctylfluorene) by Synergistically Controlling Solution Aggregation and Extending Film-forming Time

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Chinese Journal of Polymer Science 2019年第7期37卷 664-673页

作者： ya-Di Liu qiang Zhang Xin-Hong Yu Jian-Gang Liu yan-Chun Han State Key Laboratory of Polymer Physics and Chemistry Changchun Institute of Applied ChemistryChinese Academy of SciencesChangchun 130022China University of Science and Technology of China Hefei 230026China

For poly(9,9-dioctylfluorene)(PFO),β phase (coplanar conformation with the intra-chain torsion angle of 165°) has a greater conjugation length and higher degree of order compared to those of α phase, which favors charge carrier transport. However, the highest content of β phase obtained so far is 45%. We propose to increase the content of β phase by promoting the solution aggregation of PFO molecules and extending film-forming time. For this purpose, 1,8-diiodooctane (DIO) is added to PFO o-xylene solution, which enhances the interaction of PFO chains and improves the planarity of PFO backbone, resulting in the formation of ordered aggregation. The aggregates act as nucleation centers to promote the formation of β phase. The content of β phase increases with increasing DIO concentration and reaches a platform of 39% as DIO is more than 4 vol%. Furthermore, the film is kept in a sealed environment with oxylene atmosphere for 3 h, thus the PFO molecules have enough time to diffuse to the crystallization front and achieve disorder-order transition. As a result, the crystallinity of PFO is improved significantly and the content of β phase increases to 52%, reaching the highest value reported so far.

关键词： β Phase Ordered aggregation Film-forming time Disorder-order transition

Stability Analysis of Hybrid-Driven Underwater Glider

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China Ocean Engineering 2017年第5期31卷 528-538页

作者： NIU Wen-dong WANG Shu-xin WANG yan-hui SONG yang ZHU ya-qiang Key Laboratory of Mechanism Theory and Equipment Design of Ministry of Education School of Mechanical EngineeringTianjin University The Joint Laboratory of Ocean Observing and Detecting Qingdao National Laboratory for Marine Science and Technology

Hybrid-driven underwater glider is a new type of tmmanned underwater vehicle, which combines the advantages of autonomous underwater vehicles and traditional underwater gliders. The autonomous underwater vehicles have good maneuverability and can travel with a high speed, while the traditional underwater gliders are highlighted by low power consumption, long voyage, long endurance and good stealth characteristics. The hybrid-driven underwater gliders can realize variable motion profiles by their own buoyancy-driven and propeller propulsion systems. Stability of the mechanical system determines the performance of the system. In this paper, the Petrel-II hybrid-driven underwater glider developed by Tianjin University is selected as the research object and the stability of hybrid-driven underwater glider unitedly controlled by buoyancy and propeller has been targeted and evidenced. The dimensionless equations of the hybrid-driven underwater glider are obtained when the propeller is working. Then, the steady speed and steady glide path angle under steady-state motion have also been achieved. The steady-state operating conditions can be calculated when the hybrid-driven underwater glider reaches the desired steady-state motion. And the steady- state operating conditions are relatively conservative at the lower bound of the velocity range compared with the range of the velocity derived from the method of the composite Lyapunov function. By calculating the hydrodynamic coefficients of the Petrel-II hybrid-driven underwater glider, the simulation analysis has been conducted. In addition, the results of the field trials conducted in the South China Sea and the Danjiangkou Reservoir of China have been presented to illustrate the validity of the analysis and *** to show the feasibility of the method of the composite Lyapunov function which verifies the stability of the Petrel-II hybrid-driven underwater glider.

关键词： hybrid-driven underwater glider stability analysis numerical simulation field trials

Inhibitory effects of genistein on metastasis of human hepatocellular carcinoma

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World Journal of Gastroenterology 2009年第39期15卷 4952-4957页

作者： yan Gu Cheng-Fang Zhu ya-Lei Dai qiang Zhong Bo Sun Department of General Surgery Shanghai Ninth Hospital Shanghai Jiao Tong University School of Medicine Shanghai 200011 China Department of Immunology Tongji University School of Medicine Shanghai 200092 China

AIM： To investigate the inhibitory effects of genistein on metastasis of MHCC97-H hepatocellular carcinoma cells and to explore the underlying mechanism. METHODS： MHCC97-H hepatocellular carcinoma cells were exposed to genistein. A cell attachment assay was carried out in a microculture well pre-coated with fibronectin. The invasive activity of tumor cells was assayed in a transwell cell culture chamber, and cell cycle and apoptosis were evaluated by a functional assay. In addition, the expression and phosphorylation of FAK were detected by Western blotting. In situ xenograft transplantation of hepatocellular carcinoma was performed in 12 nude mice and lung metastasis of hepatocellular carcinoma was observed. RESULTS： Genistein significantly inhibited the growth of MHCC97-H cells in vitro. Adhesion and invasiveness of MHCC97-H cells were inhibited in a concentrationdependent fashion, and the inhibitory effect of genistein was more potent in the 10 i^g/mL and 20 i^g/ mL genistein-treated groups. Genistein caused G0/G1 cell cycle arrest, an S phase decrease, and increased apoptosis. The expression and phosphorylation of FAK in MHCC-97H cells were significantly decreased. In situ xenograft transplantation of hepatocellular carcinoma was also significantly suppressed by genistein. The number of pulmonary micrometastatic loci in the genistein group was significantly lower compared with the control group （12.3 ± 1.8 vs 16.6± 2.6, P 〈 0.05）. CONCLUSION： Genistein appears to be a promising agent in the inhibition of metastasis of hepatocellular carcinoma.

关键词： Human hepatocellular carcinoma Genistein Metastasis