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Polymeric partners breathe together: using gas to direct polymer self-assembly via gas-bridging chemistry

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Science China Chemistry 2022年第7期65卷 1401-1410页

作者： Zehao Gong yixin wang Qiang Yan State Key Laboratory of Molecular Engineering of Polymers Department of Macromolecular ScienceFudan University200433China

The quest for a general and facile way to regulate polymer self-assembled nanostructures with low-to high-order ergodicity is an eternal theme in soft nanoparticle fabrication. Here we present an unprecedented gas-bridging strategy that allows to use gas to direct polymer self-assembly in continuous and tunable manners. Such system comprises a partner of frustrated Lewis polymers with bulky Lewis acid and base groups. They can together “breathe in” external gases to form gas-bridged structures between the two complementary moieties, which drive their mutual complexation and assemble into polymer nanoparticles of diverse geometries and dimensionalities. This strategy is applicable to a broad family of gas substances including but not limited to carbon oxides, nitrogen oxides, sulfur oxides, and even olefins;moreover, tailoring gas types and levels can dictate distinct assembling evolutionary pathways and deformable behaviors among spherical, fibrous, polymersomal, tubesomal and cubosomal morphologies. We also discover that the gas-based bonding chemistry is the mechanistic basis underlying the phase transitional control and phase window regulation. This will open a new direction of making bespoke polymer nanostructures with gas.

关键词： gas-bridging bond Lewis pair polymer dynamic covalent chemistry self-assembly tunable nanostructure

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美国强化对华经贸防御政策新进展、影响及中国应对

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经济论坛 2025年第2期 5-16页

作者：徐金金王奕欣南昌大学公共政策与管理学院江西南昌330031

美国为竞赢中国、转移国内矛盾和维护其全球霸权地位,不断强化对华经贸防御,收紧双向投资审查,加强关键技术封锁,推进产业补贴政策,建立经济合作联盟。美国经贸防御政策将阻碍中国科技发展与国际经贸合作,损害美国企业利益及美国国内就... 详细信息

美国为竞赢中国、转移国内矛盾和维护其全球霸权地位,不断强化对华经贸防御,收紧双向投资审查,加强关键技术封锁,推进产业补贴政策,建立经济合作联盟。美国经贸防御政策将阻碍中国科技发展与国际经贸合作,损害美国企业利益及美国国内就业,加剧全球经济碎片化,威胁全球产业链供应链正常运行,冲击多边贸易体系,增加国际贸易不确定性。面对美国对华经贸防御政策的升级,中国应制定切实可行的对策,在短期应对上,应反击美国经济围堵,强化多边经贸合作,坚持科技自主创新;在长期发展上,应深化改革开放,构建以中国国内大循环为主体、国内国际双循环相互促进的新发展格局,构建人类命运共同体,推动全球治理体系变革。

关键词：美国对华经贸政策中美关系地缘经济

Common quantitative characteristics of music melodies——pursuing the constrained entropy maximization casually in composition

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Science China(Information Sciences) 2022年第7期65卷 240-242页

作者： Nan NAN Xiaohong GUAN yixin wang Youtian DU MOE KLINNS Lab Faculty of Electronic and Information Engineering Xi'an Jiaotong University Center for Intelligent and Networked Systems Tsinghua University

Music with a beautiful melody has been appreciated by humankind for thousands of years. Almost all music is generally tonal, e.g., Western music originated from ancient Greece and developed for more than 300 years from Baroque to classical, romantic, and modern music. Tonal music has a tonal center with a melody named tonic, and it is based on a specific pitch series called mode scale and harmonic progressions. On the contrary,

关键词： Power Law music melody variations complementary communitive distribution entropy functional optimization

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Quantile residual lifetime for left-truncated and right-censored data

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Science China Mathematics 2015年第6期58卷 1217-1234页

作者： wang yixin LIU Peng ZHOU Yong School of Statistics and Management Shanghai University of Finance and Economics Academy of Mathematics and Systems Science Chinese Academy of Sciences

This article proposes a simple nonparametric estimator of quantile residual lifetime function under left-truncated and right-censored data. The asymptotic consistency and normality of this estimator are proved and the variance expression is calculated. Two bootstrap procedures are employed in the simulation study,where the latter bootstrap from Zeng and Lin(2008) is 4000 times faster than the former naive one, and the numerical results in both methods show that our estimating approach works well. A real data example is used to illustrate its application.

关键词： truncated lifetime estimator consistency latter faster nonparametric naive bootstrap estimating

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在植物发育功能中的研究进展

生物学杂志 2025年第1期42卷 98-104页

作者：王奕鑫张中良解莉楠张庆祝无东北林业大学生命科学学院东北盐碱植被恢复与重建教育部重点实验室哈尔滨150040 黑龙江省庆安国有林场管理局绥化152400 东北林业大学生命科学学院哈尔滨150040 东北林业大学林木遗传育种国家重点实验室哈尔滨150040

植物经历生殖生长与营养生长阶段来确保生命周期的顺利完成,适当的开花时机对生长转变至关重要,开花的机制在植物中高度保守,这一机制的核心在于环境和内源性信号对成花素基因FLOWERING LOCUS T(FT)的转录调控。FT蛋白属于一类保守的蛋... 详细信息

植物经历生殖生长与营养生长阶段来确保生命周期的顺利完成,适当的开花时机对生长转变至关重要,开花的机制在植物中高度保守,这一机制的核心在于环境和内源性信号对成花素基因FLOWERING LOCUS T(FT)的转录调控。FT蛋白属于一类保守的蛋白家族,是营养生长和生殖生长转变过程的重要遗传因子,在两个生长阶段中都发挥着重要作用,从不同物种的生殖生长和营养生长两个方面综述FT基因的功能、作用机制和调控网络,为理解植物通过整合多种信号产生对环境变化的适应性和精确性,也为围绕植物生殖调控育种目标进行分子遗传改良提供参考。

关键词：成花素 FLOWERING LOCUS T 作用机制生殖生长营养生长

Relation of hepatic EROD activity and cytochrome P4501A level in Sebastiscus marmoratus exposed to benzo[a]pyrene

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Journal of Environmental Sciences 2008年第1期20卷 101-104页

作者： wang Yun ZHENG Ronghui ZUO Zhenghong CHEN yixin wang Chonggang Key Laboratory of the Ministry of Education for Cell Biology and Tumor Cell Engineering School of Life Sciences Xiamen University Xiamen 361005 China.

This study was designed to investigate the in vivo effects of benzo[a]pyrene （BaP） on hepatic ethoxyresorufin-O-deethylase （EROD） activity and its correlation with cytochrome P4501A （CYP1A） protein levels in Sebastiscus marmoratus, which were exposed through a water column to BaP （10, 100, 1000 ng/L, respectively） or were treated with intraperitoneal injections of BaP （0.5, 1, 5, 10 mg/kg, respectively） every 7 d. The results showed that after 25 d of waterborne exposure to 1000 ng/L BaP, fish hepatic CYP1A levels and EROD activity were significantly induced. In contrast, EROD activity was not altered 7 d after second intraperitoneal injections, whereas, CYP1A protein levels were increased. Dose-dependent increase of biliary BaP metabolites demonstrated that the catalytic activity of CYP1A was induced by treatment with BaP. The lowest observable effect concentration with regard to biliary BaP metabolites （100 ng/L） was much lower than that with reference to EROD activity （1000 ng/L）. The results suggest that biliary polycyclic aromatic hydrocarbon （PAH） metabolites were shown to better reflect the contamination gradients of PAHs than EROD activity. It appeared to be necessary to measure CYP1A protein levels to complement the EROD activity in relevant toxicological assessments.

关键词： BaP BaP metabolites EROD activity CYP1A protein Sebastiscus marmoratus

中成药中药物和药用辅料“质控对称”（QC-Symmetry）的探讨

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中草药 2025年第4期56卷 1385-1393页

作者：徐杨周伟俊郑伟然杨键王艺欣刘涛成都大学药学院成都大学张澜学院成都大学食品与生物工程学院黑龙江农业工程职业学院

药用辅料是制剂处方中不可或缺的组成部分，在药物质量标准不断提升的背景下，药用辅料成药过程和成药后质量变化和对药物整体安全和药效影响的研究相对较少，在中成药研究中尤为突出。基于中药质量标准对所用药用辅料的质量控制重视不... 详细信息

药用辅料是制剂处方中不可或缺的组成部分，在药物质量标准不断提升的背景下，药用辅料成药过程和成药后质量变化和对药物整体安全和药效影响的研究相对较少，在中成药研究中尤为突出。基于中药质量标准对所用药用辅料的质量控制重视不足，提出药物与药用辅料间“质控对称（quality control symmetry,QC-Symmetry）”及“质控不对称（quality control asymmetry,QC-Asymmetry）”的概念，并对中成药和药用辅料的QC-Asymmetry问题进行探讨，为药用辅料相关质量评价纳入中成药质量和工艺评价过程、使二者在质量和工艺控制中达到对称和相适应提供参考，以期进一步完善中成药等药物制剂研究的质量控制策略。

关键词：药用辅料质控对称中成药质量标准随药延长生产工艺有效期

Modeling of Rectangular Microchannel Heat Sink with Non-Uniform Channels and Multi-Objective Optimization

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Journal of Thermal Science 2024年第5期33卷 1701-1711页

作者： SHANG Xueshuo wang yixin LI Qingwen wang Rui CUI Zheng SHAO Wei Institute of Advanced Technology Shandong UniversityJi'nan 250014China Institute of Thermal Science and Technology Shandong UniversityJi'nan 250014China Shandong Institute of Advanced Technology Ji'nan 250100China

Rectangular microchannel heat sinks(MCHS)are widely used to cool high-heat-flux electronic ***,previous studies focused mainly on MCHS with uniform channels(UCs).This study considers a microchannel heat sink with non-uniform channels(NUCs).A mathematical model is developed based on energy equations and the Darcy flow *** expressions for total thermal resistance and coolant pressure drop are derived using the thermoelectric *** and numerical simulations are performed to verify the mathematical *** non-uniformity increases,total coolant pressure drop decreases but at the cost of higher thermal *** overall performance of NUCs is better than that of UCs because of their lower ratio of pumping power to cooling *** transfer performance of NUCs changes little for more than 120 channels and depends mainly on channel arrangement.A multi-objective optimization is conducted to minimize the thermal resistance and pumping power of an *** optimal NUC saves 64%pumping power compared with a conventional UC for the total thermal resistance of 0.1℃/W,indicating that the use of non-uniform channels could be very helpful to reduce the flow resistance of MCHS.

关键词： microchannel heat sink non-uniform channel mathematical model multi-objective optimization

Constructing high-biosecurity MoS_(2)-based anodes for rapid and efficient lithium storage

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Nano Research 2025年第2期18卷 358-366页

作者： yixin wang Ruxia Qiao Xueying Zheng wangyan Wu Hao Yang Stephanie Ling Jie Lee Jian Peng Jinyu Rong Wei Luo Sijie Lin College of Environmental Science and Engineering Biomedical Multidisciplinary Innovation Research InstituteShanghai East HospitalTongji UniversityShanghai 200092China Key Laboratory of Yangtze River Water Environment Shanghai Institute of Pollution Control and Ecological SecurityTongji UniversityShanghai 200092China Institute of New Energy for Vehicles School of Materials Science and EngineeringTongji UniversityShanghai 201804China

Lithium-ion batteries that integrate electrochemical performance and safety considerations offer advantages to curb the reliance on fossil fuels while minimizing the potential environmental *** metal disulfides and metal oxides with high specific capacity are promising candidates as anodes for lithium ***,neither the layered structure of MoS_(2) nor the powder form of In_(2)O_(3) is ideal for battery prolonged ***,we demonstrated a low-toxicity anode designed with hollow fibers to regulate the MoS_(2) contact surface,significantly reducing biotoxicity and enhancing Lit *** functional theory(DFT)calculations revealed that the interactions among MoS_(2),In_(2)O_(3),and the hollow structure lowered the Li-ion migration energy barrier hence fastening the ***,the MoS_(2)-containing fiber showed significantly decreased toxicity in zebrafish embryos compared to MoS_(2) alone,demonstrating a proof-of-principle of integrating functional nanomaterials into flexible fiber structures to improve both electrochemical performance and safety.

关键词： electrospun fibers Li-ion battery MoS_(2) In_(2)O_(3) hollow fiber low-toxicity anode