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Enzyme-metal nanocomposites for antibacterial applications

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Particuology 2022年第5期20卷 134-139页

作者： Jiarong Xiong xinyi cai Jun Ge Key Lab for Industrial Biocatalysis Ministry of EducationDepartment of Chemical EngineeringTsinghua UniversityBeijing 100084China Institute of Biopharmaceutical and Health Engineering Tsinghua Shenzhen International Graduate SchoolShenzhen 518055China

Metal nanoparticles have been used as antibacterial agents widely,and the combined use of enzymes and metal nanoparticles promotes antibacterial activity,achieving a synergistic ***,enzymes decrease the amounts of metals and increase biocompatibility,thereby reducing toxicity of ***,the efficiency of enzymes is hindered when coupled with metals,which causes deactivation in the function of *** can a balance be struck between metals and enzymes?Although the antibacterial mechanism of metal nanoparticles is relatively clear,how enzyme-metal nanocomposites work against bacteria is not ***,we describe several examples on the synthesis of enzyme-metal nanocomposites via co-immobilization or in situ reduction and summarize how enzyme-metal nanocomposites combat microorganisms.

关键词： Enzyme-metal nanocomposites Applications Preparations Antibacterial mechanisms

Bifunctional bridging capping layer enables 24.5% efficiency of perovskite solar cells with polymer-based hole transport materials

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Science China Chemistry 2025年第1期 350-359页

作者： Can Zhu Yiyang Wang Lei Meng Beibei Qiu Jing Li Shucheng Qin Ke Hu Xin Jiang Wenbin lai Minchao Liu Zhe Liu Chenxing Lu Jinyuan Zhang Yongfang Li Beijing National Laboratory for Molecular Sciences CAS Key Laboratory of Organic Solids Institute of Chemistry Chinese Academy of Sciences School of Chemical Science University of Chinese Academy of Sciences Key Laboratory of Solid State Optoelectronic Devices of Zhejiang Province College of Physics and Electronic Information Engineering Zhejiang Normal University Key Laboratory of Photochemical Conversion and Optoelectronic Materials Technical Institute of Physics and ChemistryChinese Academy of Sciences Laboratory of Advanced Optoelectronic Materials College of Chemistry Chemical Engineering and Materials ScienceSoochow University

Developing a bridge capping layer between perovskite and hole transport layer materials（HTMs） in the n-i-p perovskite solar cells（pero-SCs） is an effective approach to modify the morphology of HTMs and passivate the perovskite ***, we select the quinoxaline-based bifunctional passivation agent, quinoxalin-6-yl-methylamine hydrochloride（Qx MACl）,as the bridging layer, and a D-A copolymer PBQ12 containing the same quinoxaline unit as an HTM for the n-i-p pero-SCs. Due to the π-π stacking among the common quinoxaline units in the bridge layer and HTM, Qx MACl induces the π-π stacking of the PBQ12 film and improves the film morphology of HTMs with better conductivity. Additionally, Qx MACl can effectively passivate the perovskite surface, and PBQ12 possesses appropriate energy levels and high hole mobility. The pero-SCs based on FAPbI3with PBQ12/Qx MACl treatment showed a higher power conversion efficiency（PCE） of 24.05% and outstanding stability, maintaining 95.4% and 92.1% of its initial PCE after 750 h of storage and after over 800 h of thermal annealing at 85 °C, respectively. To further enhance the PCE of the PBQ12/Qx MACl-based devices, we developed a non-metal ion dopant for the PBQ12 HTM. Through trace doping of PBQ12 HTM by the non-metal ion dopant, the PCE of the PBQ12/Qx MACl-based devices reached 25.24%（the calibrated PCE of 24.55% by the National Institute of Metrology, China）.

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Hydrogen bond-induced elastic polyzwitterion electrolytes constructed by mussel-inspired autopolymerization for zinc-ion battery

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Science China Chemistry 2024年第10期67卷 3438-3449页

作者： Shi Wang xinyi Wu Chao Liu Lingjun He Shuanghan Li Yuqi Miao Mingrui Cai Yi Li Zheng-Dong Huang Wen-Yong lai State Key Laboratory of Organic Electronics and Information Displays(SKLOEID) Institute of Advanced Materials(IAM)School of Chemistry and Life SciencesNanjing University of Posts&TelecommunicationsNanjing 210023China

Aqueous zinc-ion batteries(ZIBs)have attracted much interest to realize safe rechargeable batteries with high safety and high energy ***,it is still challenging to address dendrite growth and parasitic reactions in zinc *** propose herein the design concept of hydrogen bond-induced elastic polyzwitterion electrolytes with zincophilic groups for achieving robust ***-inspired autopolymerization has been developed to construct the polyzwitterion electrolytes at room temperature by inducing electron density delocalization atα-position of C=C bond in zwitterion monomer by Zn^(2+).Specifically,the zwitterionic functional groups construct ion transport channels,and the unique–NH–and SO_(3)^(-)groups co-compete with H_(2)O for coordination with Zn^(2+)and promote the desolvation of hydrated Zn^(2+),thus achieving a high room temperature ionic conductivity(6.7 mS cm^(-1))and an increased Zn^(2+)migration number(0.65)for the polyzwitterion *** addition,various interactions such as hydrogen bonding and electrostatic interactions between electrolyte ions and zwitterionic groups impart high stretchability and strength to the polyzwitterion electrolytes,which,combined with SO_(3)^(-)philic(002)crystallographic properties,effectively inhibit the growth of zinc *** a result,rigid/wearable solid-state ZIBs exhibit excellent cycling and C-rate *** believe that the strategy of constructing polyzwitterionic electrolytes with zincophilic groups and ion transport channels opens up a new direction in polymer electrolyte engineering towards safe and high energy batteries.

关键词： flexible electronics wearable electronics polyzwitterion electrolytes self-polymerization zinc-ion batteries

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Special focus on security and privacy in blockchain-based applications

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Science China(Information Sciences) 2020年第3期63卷 5-6页

作者： Sheng ZHONG xinyi HUANG Nanjing University Fujian Normal University

The concept of blockchain was introduced by Satoshi Nakamoto in 2008. Blockchain is the core technique to support and achieve Bitcoin. Roughly speaking, a blockchain is a chained data structure that combines data blocks in a sequential manner in terms of time. It also can be viewed as a tamper-proof and unforgeable distributed ledger guaranteed by cryptography. Blockchain technology is a new application

关键词： Special focus on security and privacy in blockchain-based applications

Phaeocystidibacter luteus ***.,a new member of the family Cryomorphaceae isolated from the marine alga Phaeocystis globosa and emended description of Owenweeksia hongkongensis

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Phaeocystidibacter luteus ***.,a new member of the family Cr...

Persistent alterations in gray matter in COVID-19 patients experiencing sleep disturbances:a 3-month longitudinal study

第四届全国微生物资源学术暨国家微生物资源平台运行服务研讨会

作者： Yanyan Zhou1,Jianqiang Su1,2,Qiliang lai1,3,xinyi Li1,Xiaoru Yang1,2,Peiyan Dong1,Tianling Zheng1 State Key Lab.of Marine Environmental Science and Key Lab.of the MOE for Coastal and Wetland Ecosystems,School of Life Sciences,Xiamen University,Xiamen 361005,China The Institute of Urban Environment(IUE),Chinese Academy of Sciences,Xiamen 361005,China Key Lab.of Marine Biogenetic Resources,Third Institute of Oceanography,State Oceanic Administration,Xiamen 361005,China

A taxonomic study was carried out on strain PG2S01T,isolated from a culture of Phaeocystis globosa,a haemolytic,toxin-producing,harmful marine *** of strain PG2S01T were Gram-staining-negative,strictly aerobic,non-motile,non-fermentative,orange-pigmented,and moderately halophilic *** was observed in the presence of 0.25-7.5% NaCl and at 4-40 °*** dominant fatty acids were iso-c15:0,summed feature 3(c16:1ω7c and/or c16:1ω6c),iso-c17:0 3-OH,iso-c16:0 3-OH,iso-c15:1 G and iso-c15:0 *** major polar lipids were phosphatidylethanolamine and several unidentified aminolipids,phospholipids and other *** G+C content of the chromosomal DNA was 44.6 mol%.The 16S rRNA gene sequence comparisons showed that strain PG2S01T was most closely related to Owenweeksia hongkongensis UST20020801T(88.9 %);levels of similarity between strain PG2S01T and the type strains of other recognized species in the family Cryomorphaceae were less than 88 %.Phylogenetic analyses based on 16S rRNA gene sequences showed that strain PG2S01T formed a distinct evolutionary lineage within the family *** PG2S01T was distinguishable from members of phylogenetically related genera by differences in several phenotypic *** the basis of the phenotypic data and phylogenetic inference,strain PG2S01T represents a novel genus and species in the family Cryomorphaceae for which the name Phaeocystidibacter luteus ***.,*** *** type strain is PG2S01T(= CCTCC AB 209288T = BCCM /LMG 25704T= MCCC 1F01079T).An emended description of Owenweeksia hongkongensis Lau et al.2005 is also proposed.

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Neural Regeneration Research 2025年第10期20卷 3013-3024页

作者： Kaixuan Zhou Gaoxiong Duan Ying Liu Bei Peng Xiaoyan Zhou Lixia Qin Lingyan Liang Yichen Wei Qingping Zhang Xiaocheng Li Haixia Qin Yinqi lai Yian Lu Yan Zhang Jiazhu Huang Jinli Huang Yinfei Ouyang Bolin Bin Mingming Zhao Jun Liu Jianrong Yang Demao Deng Guangxi Key Laboratory of Special Biomedicine School of MedicineGuangxi UniversityNanningGuangxi Zhuang Autonomous RegionChina Department of Radiology the People’s Hospital of Guangxi Zhuang Autonomous RegionGuangxi Academy of Medical SciencesNanningGuangxi Zhuang Autonomous RegionChina Department of Sleep Medicine the People’s Hospital of Guangxi Zhuang Autonomous RegionNanningGuangxi Zhuang Autonomous RegionChina Department of Radiology The Second Xiangya HospitalCentral South UniversityChangshaHunan ProvinceChina Guangxi Clinical Research Center for Sleep Medicine the People’s Hospital of Guangxi Zhuang Autonomous RegionNanningGuangxi Zhuang Autonomous RegionChina

Sleep disturbances are among the most prevalent neuropsychiatric symptoms in individuals who have recovered from severe acute respiratory syndrome coronavirus 2 *** studies have demonstrated abnormal brain structures in patients with sleep disturbances who have recovered from coronavirus disease 2019(COVID-19).However,neuroimaging studies on sleep disturbances caused by COVID-19 are scarce,and existing studies have primarily focused on the long-term effects of the virus,with minimal acute phase *** a result,little is known about the pathophysiology of sleep disturbances in the acute phase of *** address this issue,we designed a longitudinal study to investigate whether alterations in brain structure occur during the acute phase of infection,and verified the results using 3-month follow-up data.A total of 26 COVID-19 patients with sleep disturbances(aged 51.5±13.57 years,8 women and 18 men),27 COVID-19 patients without sleep disturbances(aged 47.33±15.98 years,9 women and 18 men),and 31 age-and gender-matched healthy controls(aged 49.19±17.51 years,9 women and 22 men)were included in this *** COVID-19 patients with sleep disturbances were included in a longitudinal *** found that COVID-19 patients with sleep disturbances exhibited brain structural changes in almost all brain *** cortical thicknesses of the left pars opercularis and left precuneus were significantly negatively correlated with Pittsburgh Sleep Quality Index ***,we observed changes in the volume of the hippocampus and its subfield regions in COVID-19 patients compared with the healthy *** 3-month follow-up data revealed indices of altered cerebral structure(cortical thickness,cortical grey matter volume,and cortical surface area)in the frontal-parietal cortex compared with the baseline in COVID-19 patients with sleep *** findings indicate that the sleep disturbances patients had altered morphology in the cortical an

关键词： brain structure cortical gray matter volume cortical surface area cortical thickness hippocampus magnetic resonance imaging Pittsburgh Sleep Quality Index severe acute respiratory syndrome coronavirus 2 infections sleep disturbances sub-cortical volume

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EXACT SOLUTIONS OF THE EXTENDED BURGERS-FISHER EQUATION

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Chinese Physics Letters 1990年第4期7卷 145-147页

作者： WANG xinyi LU Yuekai Institute of Theoretical Physics Academia SinicaBeijing 100080 Department of Physics Suzhou UniversitySuzhou 215006 Department of Physics Lanzhou UniversityLanzhou 730000

The exact solitary wave solutions of the extended Burgers-Fisher equation ∂u/∂t+αu^(δ)∂u/∂x-∂^(2)u/∂x^(2)=βu(1-u^(δ))are obtained by using a simple and effective nonlinear *** results are the generalization of the... 详细信息

关键词： generalization exact solitary

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岁星四纪——回望木星大气探测50年

地球与行星物理论评（中英文） 2025年第1期56卷 67-82页

作者：宋心仪杨军魏勇北京大学物理学院大气与海洋科学系气候与海-气实验室北京100871 中国科学院地质与地球物理研究所地球与行星物理重点实验室北京100029

木星是太阳系中最大的行星,也是自转速度最快的行星.作为一颗气态巨行星,木星没有海陆分布、复杂地形等因素的影响,是研究大气动力学的天然试验场.木星的大气成分、大气环流、内部结构特征等都具有重要的科学意义.1973年12月4日,先驱者1... 详细信息

木星是太阳系中最大的行星,也是自转速度最快的行星.作为一颗气态巨行星,木星没有海陆分布、复杂地形等因素的影响,是研究大气动力学的天然试验场.木星的大气成分、大气环流、内部结构特征等都具有重要的科学意义.1973年12月4日,先驱者10号飞掠木星,实现了人类第一次木星大气近距离探测.如今木星探测已经积累了50余年的经验,发射了10次木星任务:7次飞掠任务、伽利略号与朱诺号两次环绕任务、正在飞行途中的木星冰卫星探测任务.本文简要回顾了这10次探测任务及其取得的科学成果,重点关注木星的大气成分、波动和急流、大红斑、极地涡旋等方面取得的进展,并指出一些尚未解决的科学难题.我国计划于2030年左右发射天问四号,对木星系进行探测.回顾过去的木星探测任务,对于天问四号如何合理设计科学载荷、制定科学目标等具有一定的借鉴意义.

关键词：木星探测大气成分大气动力急流大红斑极地涡旋

Structural understanding of T cell receptor triggering

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Cellular & Molecular Immunology 2020年第3期17卷 193-202页

作者： xinyi Xu Hua Li Chenqi Xu State Key Laboratory of Molecular Biology Shanghai Science Research CenterCAS Center for Excellence in Molecular Cell ScienceShanghai Institute of Biochemistry and Cell BiologyChinese Academy of SciencesUniversity of Chinese Academy of Sciences320 Yueyang Road200031 ShanghaiChina School of Life Science and Technology ShanghaiTech University100 Haike Road201210 ShanghaiChina

The T cell receptor(TCR)is one of the most complicated receptors in mammalian cells,and its triggering mechanism remains *** an octamer complex,TCR comprises an antigen-binding subunit(TCRαβ)and three CD3 signaling subunits(CD3ζζ,CD3δε,and CD3γε).Engagement of TCRαβwith an antigen peptide presented on the MHC leads to tyrosine phosphorylation of the immunoreceptor tyrosine-based activation motif(ITAM)in CD3 cytoplasmic domains(CDs),thus translating extracellular binding kinetics to intracellular signaling *** conformational change plays an important role in the transmembrane signal transduction of TCR is under *** by the complexity and functional importance of TCR,many groups have been studying TCR structure and triggering for decades using diverse biochemical and biophysical ***,we synthesize these structural studies and discuss the relevance of the conformational change model in TCR triggering.

关键词： T Cell Receptor Structure Conformational change Triggering