Results 21 to 30 of about 15,664 (213)

Effect of Worm‐Like Amorphous Phase on Corrosion Resistance and Antibacterial Properties of NiTiCu Alloy

open access: yesRare Metals, Volume 45, Issue 4, April 2026.
ABSTRACT By adding CuO, the worm‐like amorphous phase and atomic clusters were simultaneously introduced, enabling the (Ni40Ti40Cu20)99.9O0.1 alloy micron columns to exhibit a uniform flow strain of over 40% and a strength of over 2.5 GPa during compression.
Huwen Ma   +13 more
wiley   +1 more source

Study on the interactions of typical PAHs and their metabolites with serum albumin and their controlling ways using cyclodextrins [PDF]

open access: yes, 2016
血清白蛋白是血浆中含量最丰富的运输蛋白,对血液中许多内、外源物质具有广普的结合能力,具有重要的生理功能。多环芳烃(PolycyclicAromaticHydrocarbons,PAHs)及其代谢物可与血清白蛋白形成稳定的加合物,由此随血液循环转运分布至各组织器官,引起毒性效应。该结合过程也可对血清白蛋白的结构和功能产生不利影响。因此,深入研究PAHs及其代谢物与血清白蛋白的结合作用,探究PAHs对血清白蛋白结构和功能的影响及寻求该结合作用的调控方式对了解PAHs在生物体内的赋存状态、毒性强度及致毒机制 ...
张静
core  

Genomic responses to increased temperature and pollinator selection in Brassica rapa L.

open access: yesNew Phytologist, Volume 250, Issue 2, Page 1231-1247, April 2026.
Summary Rapid environmental change reshapes both abiotic stress and biotic interactions, yet it remains unclear how these combined forces structure plants' genomic adaptation. In particular, the joint influence of temperature and pollinator identity, two ecological axes undergoing simultaneous global shifts, has rarely been quantified at genomic ...
Yanqian Ding, Florian P. Schiestl
wiley   +1 more source

动态载荷下支柱瓷绝缘子的应力特征研究

open access: yesDianci bileiqi, 2019
支柱瓷绝缘子的脆性断裂故障给电力系统的安全稳定运行造成了严重的影响,而支柱瓷绝缘子在动态载荷下的运行条件要更加恶劣,断裂故障亦更加频繁。为分析动态载荷下支柱瓷绝缘子的应力特征分布规律,基于热-结构耦合数学模型建立了支柱瓷绝缘子有限元数值仿真模型,并分别建立了相应的动态风力、短路电动力和地震动态载荷的数学模型,对动态风力、短路电动力和地震波作用下的应力特征及最大拉应力动态变化特征进行计算分析。
李尊   +4 more
doaj  

Study on preparation, characterization and thermal conductivity of graphene [PDF]

open access: yes, 2016
自从石墨烯被发现以来,其一系列优异的性质引起了研究人员广泛的关注。石墨烯的高导热性能可以应用在工业的各个方面。比如石墨烯材料有望在高性能电子器件、复合材料、场发射材料、气体传感器及能量存储等领域获得广泛应用[1]。石墨烯被视为一种很有前途的新型散热材料。目前已经有许多理论分析了石墨烯的导热性能。比如Fourier定律的数解,基于波尔兹曼Boltzmann传输方程和分子动力学Molecular—dynamics(MD)模拟的分析方法等。但是在实验方面 ...
张巍伟
core  

From Douyin Shop to TikTok Shop: The Platformized Supply Chain, Spatialized Business Model, and Regional Partnership in Cross‐Border e‐Commerce

open access: yesPolicy &Internet, Volume 18, Issue 1, March 2026.
ABSTRACT This article investigates how TikTok Shop reproduces the e‐commerce model of Douyin Shop against a backdrop of divergent regulatory challenges and geopolitical distrust. One of the strategic changes we observe in TikTok Shop is the shift of consumer goods suppliers from local merchants to China‐based sellers.
Shuaishuai Wang, Jing Meng, Yitong Li
wiley   +1 more source

The crystal structures of Histidine kinase YycG in active and inactive state [PDF]

open access: yes, 2015
双组分信号转导系统(Twocomponentsignaltransductionsystem,TCS)由组氨酸激酶蛋白和对应的反应调控蛋白组成,是细菌中普遍存在的高效且重要的信号转导通路。其中YycFG双组分系统是目前已知分布最广泛的重要TCS之一,普遍存在于包括金黄色葡萄球菌、肺炎链球菌和粪肠球菌等常见致病菌在内的低G+C含量的革兰氏阳性菌中。YycFG双组分系统在细菌的细胞壁代谢、细胞膜形成以及一些耐药菌株的抗药性中发挥着至关重要的作用。但是,YycFG双组分系统的信号转导机制和分子结构仍然不清楚 ...
蔡永飞
core  

Global Simulations of Enzymatic Catalysis [PDF]

open access: yes, 2017
酶催化包括底物到活性区的输运、选择催化化学反应及产物释放等复杂过程,由于复杂的蛋白质环境效应,任一化学和非化学过程都有可能是决定酶活性的关键步骤; 。为了全面认识酶催化活性,我们对几类酶催化过程进行了广泛的组合量子/分子力学(QM/MM)和经典分子力学(MM)动力学模拟(MD)研究,详细地讨; 论了整个酶催化过程的分子机制、关键残基的作用和蛋白质环境效应,丰富了对酶催化活性的认识。随着多尺度模型和计算模拟方法的进一步完善与发展,有望实现; 超大复杂生物酶催化过程的全程模拟研究 ...
曹泽星, 赵媛
core   +1 more source

Electronegativity‐Driven Frontier Orbital Engineering in B‐Ti Diatomic Synergy Enables Selective Li2C2O4 Conversion in Li‐CO2 Batteries

open access: yesRare Metals, Volume 45, Issue 3, March 2026.
ABSTRACT As a promising alternative to sluggish Li2CO3‐based Li‐CO2 electrochemistry, Li2C2O4 offers a favorable 2e− discharge pathway, yet its selective formation and reversible decomposition remain debated. Herein, we propose a nonmetal‐metal synergistic catalyst—B‐Ti coregulated layered transition metal boride Ti18B18O9/graphene (B‐Ti/TiBOG)—to ...
Qiong Peng   +8 more
wiley   +1 more source

An improved particle swarm algorithm based on dynamic segmentation and neighborhood reverse learning(基于动态分级和邻域反向学习的改进粒子群算法)

open access: yesZhejiang Daxue xuebao. Lixue ban, 2018
针对粒子群算法容易陷入局部最优解的问题,提出了一种基于动态分级和邻域反向学习的改进粒子群算法.该算法通过构建动态分级机制,将种群中的粒子动态地划分成3个等级,对不同等级内的粒子采取不同的扰动行为,使得粒子在增强种群多样性的同时保持向全局最优方向进化;采用粒子智能更新方式,提高了粒子的搜索能力;引入动态邻域反向学习点建立全局搜索策略,促使种群快速寻优.最后,利用多种典型测试函数对该算法进行仿真实验,结果表明,与其他几种优化算法相比,本算法具有较好的收敛性和稳定性.
RENYanzhi(任燕芝)
doaj   +1 more source

Home - About - Disclaimer - Privacy