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Specific Ion Effects on the Enzymatic Degradation of Polyester Films

Chinese Journal of Polymer Science 2023年第4期41卷 476-482,I0005页

作者： jian Zhang Jie zhu Zan Hua Guang-ming Liu Department of Chemical Physics Key Laboratory of Surface and Interface Chemistry and Energy Catalysis of Anhui Higher Education InstitutesUniversity of Science and Technology of ChinaHefei230026China Key Laboratory of Yarn Materials Forming and Composite Processing Technology of Zhejiang Province College of Material and Textile EngineeringJiaxing UniversityJiaxing314001China Biomass Molecular Engineering Center and Department of Materials Science and Engineering School of Forestry and Landscape ArchitectureAnhui Agricultural UniversityHefei230036China

Soil environment on earth contains a variety of ions,which are expected to play a vital role in the biodegradation of plastics discarded in the *** this work,poly(butyleneadipate-co-terephthalate)(PBAT)is employed as a model biodegradable plastic to study the specific ion effects on the enzymatic degradation of polyester *** results show that the specific ion effects on the enzymatic degradation rate of the PBAT films and on the catalytic rate constant for the enzymatic hydrolysis of the ester bonds are strongly dependent on temperature and ionic *** the enzymatic degradation rate and catalytic rate constant decrease following the trends Na^(+)>K^(+)>Ca^(2+)and Cl^(-)>SO_(4)^(2-)>NO_(3)^(-)for cations and anions,respectively,indicating that the ion-specific enzymatic degradation of the PBAT films is closely correlated with the specific ion effects on enzymatic hydrolysis of the ester *** study shows that the specific ion effects on the enzyme activity can be understood by taking into account the ion-specific cation-anion interaction,ionic dispersion force,salting-out effect and salting-in *** study of specific ion effects on the enzymatic hydrolysis of the ester bonds and the resultant enzymatic degradation of the PBAT films would offer us a new clue to develop new biodegradable,environmentally friendly synthetic plastics.

关键词： Specific ion effects Biodegradable films Ion-enzyme interactions Enzyme activity

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Elevating kinetics of passivated Fe anodes with NH_(4)Cl regulator:Toward low-cost,long-cyclic and green cathode-free Fe-ion aqueous batteries

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Nano Research 2022年第4期15卷 3187-3194页

作者： Shibo Chai jianhui zhu jian jiang Chang ming Li School of Physical Science and Technology Southwest UniversityNo.2 Tiansheng RoadBeiBei DistrictChongqing 400715China School of Materials and Energy and Chongqing Key Lab for Advanced Materials and Clean Energies of TechnologiesSouthwest UniversityNo.2 Tiansheng RoadBeiBei DistrictChongqing 400715China Key Laboratory of Laser Technology and Optoelectronic Functional Materials of Hainan Province Key Laboratory of Functional Materials and Photoelectrochemistry of HaikouCollege of Chemistry and Chemical EngineeringHainan Normal UniversityHaikou 571158China

The environment benignity and battery cost are major concerns for grid-scale energy storage *** emerging dendrite-free Fe-ion aqueous batteries are promising due to the rich natural abundance,low cost and non-toxicity for Fe ***,serious passivation reactions on Fe anodes and poor long-term cyclability for matched cathodes still stand in the way for their practical *** settle above constraints,we herein use NH_(4)Cl as the electrolyte regulator to elevate the reaction kinetics of passivated Fe anodes,and also propose a special cathode-free design to prolong the cells lifetime over 1,000 *** added NH_(4)Cl can erode/break inert passivation layers and strengthen the ion conductivity of electrolytes,facilitating the reversible Fe plating/stripping and Fe^(2+)*** highly puffed nano carbon foams function as current collectors and actives anchoring hosts,enabling expedite Fe^(2+)adsorption/desorption,FeII/FeIII redox conversions and FeIII *** configured rocking-chair Fe-ion cells have good environmental benignity and decent energy-storage behaviors,including high reactivity/reversibility,outstanding cyclic stability and far enhanced operation *** economical,long-cyclic and green cathode-free Fe-ion batteries may hold great potential in near-future energy-storage power stations.

关键词： elevated kinetics passivated Fe anodes NH_(4)Cl regulator cathode-free design Fe-ion batteries

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Sparse Modal Decomposition Method Addressing Underdetermined Vortex-Induced Vibration Reconstruction Problem for Marine Risers

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China Ocean Engineering 2024年第2期38卷 285-296页

作者： DU Zun-feng zhu Hai-ming YU jian-xing State Key Laboratory of Hydraulic Engineering Intelligent Construction and Operation School of Civil EngineeringTianjin UniversityTianjin 300350China

When investigating the vortex-induced vibration(VIV)of marine risers,extrapolating the dynamic response on the entire length based on limited sensor measurements is a crucial step in both laboratory experiments and fatigue monitoring of real *** problem is conventionally solved using the modal decomposition method,based on the principle that the response can be approximated by a weighted sum of limited vibration ***,the method is not valid when the problem is underdetermined,i.e.,the number of unknown mode weights is more than the number of known *** study proposed a sparse modal decomposition method based on the compressed sensing theory and the Compressive Sampling Matching Pursuit(Co Sa MP)algorithm,exploiting the sparsity of VIV in the modal *** the validation study based on high-order VIV experiment data,the proposed method successfully reconstructed the response using only seven acceleration measurements when the conventional methods failed.A primary advantage of the proposed method is that it offers a completely data-driven approach for the underdetermined VIV reconstruction problem,which is more favorable than existing model-dependent solutions for many practical applications such as riser structural health monitoring.

关键词： motion reconstruction vortex-induced vibration(VIV) marine riser modal decomposition method compressed sensing

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Challenges in Atomic-Scale Characterization of High-k Dielectrics and Metal Gate Electrodes for Advanced CMOS Gate Stacks

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Journal of Materials Science & Technology 2009年第3期25卷 289-313页

作者： Xinhua zhu jian-min zhu Aidong Li Zhiguo Liu Naiben ming National Laboratory of Solid State Microstructures Department of Physics Nanjing University Nanjing 210093 China

The decreasing feature sizes in complementary metal-oxide semiconductor （CMOS） transistor technology will require the replacement of SiO2 with gate dielectrics that have a high dielectric constant （high-k） because as the SiO2 gate thickness is reduced below 1.4 nm, electron tunnelling effects and high leakage currents occur in SiO2, which present serious obstacles to future device reliability. In recent years significant progress has been made on the screening and selection of high-k gate dielectrics, understanding their physical properties, and their integration into CMOS technology. Now the family of hafnium oxide-based materials has emerged as the leading candidate for high-k gate dielectrics due to their excellent physical properties. It is also realized that the high-k oxides must be implemented in conjunction with metal gate electrodes to get sufficient potential for CMOS continue scaling. In the advanced nanoscale Si-based CMOS devices, the composition and thickness of interfacial layers in the gate stacks determine the critical performance of devices. Therefore, detailed atomic- scale understandings of the microstructures and interfacial structures built in the advanced CMOS gate stacks, are highly required. In this paper, several high-resolution electron, ion, and photon-based techniques currently used to characterize the high-k gate dielectrics and interfaces at atomic-scale, are reviewed. Particularly, we critically review the research progress on the characterization of interface behavior and structural evolution in the high-k gate dielectrics by high-resolution transmission electron microscopy （HRTEM） and the related techniques based on scanning transmission electron microscopy （STEM）, including high-angle annular dark- field （HAADF） imaging （also known as Z-contrast imaging）, electron energy-loss spectroscopy （EELS）, and energy dispersive X-ray spectroscopy （EDS）, due to that HRTEM and STEM have become essential metrology tools for characterizing the d

关键词： High-k gate dielectrics Metal gate electrodes, CMOS gate stack HRTEM STEM

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Functionally Oriented Tumor Microenvironment Responsive Polymeric Nanoassembly:Engineering and Applications

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Chinese Journal of Polymer Science 2018年第3期36卷 273-287页

作者： Wen-ming Zhang jian Zhang zhu Qiao Jun Yin Department of Polymer Science and Engineering School of Chemistry and Chemical EngineeringHefei University of Technology and Anhui Province Key Laboratory of Advanced Catalytic Materials and Reaction EngineeringHefei 230009China

The excellent drug encapsulation,prolonged in vivo circulation time,enhanced pharmacokinetics,and reduced adverse effects make the polymeric assemblies ideal carriers in nanomedicine,and become an emerging research field with rapid *** vivo,the polymer nanoassemblies will experience five steps,including circulation in the blood,accumulation in the tumoral site,penetration into the deep tumor tissue to reach cancer cells,internalization into cancer cells,and intracellular drug ***,although tremendous efforts have been made to the material design,currently available carriers still have difficulties in fulfilling all of the ***,the long-standing dilemma of the synchronized stability and permeability of vesicles is still a big challenge,which confused researchers for a long *** feature article tbcuses on the recent progress of single-or multi-stimuli triggered theranostic platforms,and the extracellularly reengineered shell-sheddable polymeric nanocarriers are systematically *** perspectives for future developments in the nanocarriers functioned with artificial helical polymers(the potential cell-penetrating peptides mimics)are also *** speculate that this feature article can fit the interesting of diverse readers and a guideline for the design of next generation of drug nanocarriers.

关键词： Block copolymers Tumor microenvironment responsive Self-assembly Theranostic Nanomedicine

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Numerical study on the strain capacity of girth-welded X80 grade pipes

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Petroleum Science 2022年第5期19卷 2399-2412页

作者： Xu Wang jian Shuai Sheng-zhu Zhang Wei Ren Xue-ming zhu College of Safety and Ocean Engineering China University of PetroleumBeijing102249China Department of Structural Engineering Norwegian University of Science and Technology(NTNU)Trondheim7491Norway China Academy of Safety Science and Technology Beijing100012China

Strain capacity is an important performance indicator for designing and evaluating high-grade steel *** to the inhomogeneity of material properties in welded structures,girth welds are one of the main factors that restrict the strain capacity of *** this paper,girth-welded pipes with cracks in the inner surface of the weld have been studied,and the ductile crack initiation and propagation behavior have been simulated using the Gurson *** corresponding nominal strain at the onset of crack initiation was defined as the characteristic value of strain *** influencing factors on the strain concentration area,strain concentration factor,and strain capacity of girth-welded pipes were quantitatively analyzed.A semiempirical calculation formula for the strain capacity of typical girthwelded X80 grade pipes has been proposed as a function of the crack size,mismatch coefficient of the weld,and softening degree of the heat affected zone(HAZ).This study can facilitate the defect assessment of girth-welded pipes.

关键词： Strain capacity Girth-welded X80 grade pipes Mismatch and softening

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DAO媒介:驱动未来社会算法化与自组织的元媒介

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新疆师范大学学报（哲学社会科学版） 2025年第1期46卷 132-141页

作者：喻国明苏健威北京师范大学新闻传播学院北京师范大学传播创新与未来媒体实验平台北京100875

DAO媒介是以区块链算法等技术为基础,支持数字社群协同自治的媒介,具有区块链、智能合约与投票等功能特性和要素确权、技术信任、规则构架以及场景聚合等价值禀赋。对于数字生态显露的各种问题,“算法化”是重构数字生态、降解社会系统... 详细信息

DAO媒介是以区块链算法等技术为基础,支持数字社群协同自治的媒介,具有区块链、智能合约与投票等功能特性和要素确权、技术信任、规则构架以及场景聚合等价值禀赋。对于数字生态显露的各种问题,“算法化”是重构数字生态、降解社会系统复杂性的关键机制,DAO媒介是支撑“自组织式”算法化的元媒介。DAO媒介与数字文明时代喷发的微粒个体、微资源、微价值、微需求、微场景等相匹配,能够深度匹配人的个性与自我,形成有效的趣缘连接,进而极大地释放数字文明的生产力。DAO媒介将深刻影响社会系统的构造,将微粒个体与相关社会要素“包裹”为闭环子系统,支持其准开放的系统边界、有效的异质性整合、可持续的规则重构、子系统与父级系统的持续分化和快速进化,等等。在数字文明时代,DAO媒介将使“重新部落化”的“地球村”变为现实,其驱动构筑的DAO社会将更加多元、更加富有创造力,不断拓展人类群体实践的自由度,使人类在高度异质性聚合基础上更加和谐有序地整合协同。

关键词： DAO 数字媒介算法自组织社会系统

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一种提高并行数据挖掘效率的方法

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计算机科学 2004年第2期31卷 132-134,166页

作者：佘春东范植华孙世新车明唐剑电子科技大学计算机科学与工程学院成都610054 中国科学院软件研究所北京100080 西昌卫星发射中心技术部西昌615000

发现关联规则是数据挖掘的一项重要任务,本文介绍了几种数据挖掘的串行和并行算法。其中IDD算法是一种高效的和易于扩展的发现关联规则的并行算法,然而,当处理器数目增加时,由于负载的失衡导致其效率的严重下降,于是通过引入近似算法成... 详细信息

发现关联规则是数据挖掘的一项重要任务,本文介绍了几种数据挖掘的串行和并行算法。其中IDD算法是一种高效的和易于扩展的发现关联规则的并行算法,然而,当处理器数目增加时,由于负载的失衡导致其效率的严重下降,于是通过引入近似算法成功地解决了这个问题。我们给出了两种近似算法和其性能证明,其一是在线算法,另一种是离线算法。在本文的最后,我们进行了改进的IDD算法的复杂性分析。

关键词：数据库知识发现并行数据挖掘效率关联规则数据集合数据驱动计算机

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小麦赤霉病有性和无性世代致病性比较研究

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山地农业生物学报 2001年第5期20卷 334-338页

作者：任明见朱文华贵州大学农学院麦作研究中心贵州贵阳550025

1999～ 2 0 0 0年分别采用小麦赤霉病的有性世代 (Gibberellazeae)子囊孢子和无性世代(Fusariumgraminearum)分生孢子对 64份小麦品种 (系 )进行穗部注射法接种。结果表明 ,多数品种 (系 )用子囊孢子接种的病穗率和病情指数比用分生孢... 详细信息

1999～ 2 0 0 0年分别采用小麦赤霉病的有性世代 (Gibberellazeae)子囊孢子和无性世代(Fusariumgraminearum)分生孢子对 64份小麦品种 (系 )进行穗部注射法接种。结果表明 ,多数品种 (系 )用子囊孢子接种的病穗率和病情指数比用分生孢子接种的病穗率和病情指数略高 ,说明有性世代的致病性比无性世代的致病性强。与自然发病比较 ,两种菌源接种的结果是相似的 ,即自然发病重的品种 ,采用有性和无性世代接种的病穗率和病情指数均较高 ;反之自然发病轻的品种 ,有性和无性世代接种的病穗率和病情指数均较低 ,说明用有性和无性世代菌源接种都有效。

关键词：小麦赤霉病有性世工无性世代致病性比较研究抗病育种

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Microstructure and mechanical properties of multi-principal component AlCoCrFeNiCu_x alloy

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Rare Metals 2016年第5期35卷 385-389页

作者： Jin-ming zhu Jie-Li Meng jian-Lie Liang College of Science Guangxi University for Nationalities

By introducing Cu, AlCoCrFeNiCux （x values in molar ratio, x = 0, 0.1, 0.5, 1.0, 1.5, 2.0, and 2.5） alloys were designed and prepared. The effects of Cu on microstructure and properties of Al Co Cr Fe Ni alloy were investigated. The introduction of Cu results in the formation of Cu-rich FCC solid solution phase when Cu content is *** are two FCC solid solution phases, i.e., Cu-rich FCC solid solution phase and phase transformation-induced FCC solid solution phase, when the Cu content is more than 1.0. Both the yield stress and plastic strain of alloy show a turning point when the Cu content is 0.5. Among the seven alloys, Cu0.5 alloy exhibits the largest yield stress of 1187 MPa and the lowest plastic strain of 16.01 %.

关键词： Multi-principal component alloys Mechanical properties Microstructure High entropy

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