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Sensitivity to Stress Concentration of Steel at High Temperature

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Journal of Iron and Steel Research International 2003年第3期10卷 59-63页

作者： xiao Feng YANG ren-hui Chongqing Institute of Technology

A new experimental method was developed to simulate the generation of the surface transversal crack on the continuous casting slab with a discontinuous sample. A high temperature property of steel named"the sensitivity to the stress concentration of steel at high temperature"was defined to evaluate the effect of stress concentration on thermal plasticity of steel. "The sensitivity parameter to the stress concentration of steel at high temperature"was available to determine the temperature range in which steel is sensitive to the stress concentration.

关键词： stress concentration continuous casting surface crack high temperature property

A novel fluorescent epoxy resin for organophosphate pesticide detection

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Chinese Chemical Letters 2015年第1期26卷 39-42页

作者： hong-Xing Zhang ren-Bo Wei Chuan-Zhi Chen Xin-Lin Tuo xiao-Gong Wang Department of Chemical Engineering Laboratory of Advanced Materials(MOE)Tsinghua University Department of Chemical Defense Institute of Chemical Defense

In this work,a novel bisbenzimidazolylpyridine-functionalized fluorescent epoxy resin was synthesized for organophosphate pesticide *** epoxy resin was characterized by Fourier-transform infrared spectroscopy（FT-IR）,proton nuclear magnetic resonance spectroscopy（~1H NMR）,gel permeation chromatography（CPC）,differential scanning calorimetry（DSC） and fluorescence *** loading with Eu（Ⅲ） ions,the epoxy resin showed a strong fluorescence *** fluorescence emission was observed to be instantaneously quenched when exposed to trace amount of diethyl chlorophosphate in *** Stern-Volmer quenching constants Ksv for quenching at617 nm was determined to be 0.377 × 10^3 L/*** sensitive emission-quenching function and easy processing nature of the polymeric support enable the resin to be a promising chemosensor candidate for the detection of organophosphates.

关键词： MeBIP Epoxy resin Europium complex Fluorescence quenching Organophosphates

Microstructure formation mechanism of catalyst layer and its effect on fuel cell performance:Effect of dispersion medium composition

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Journal of Energy Chemistry 2022年第10期31卷 588-598,I0015页

作者： hong ren Xiangchao Meng Yongli Lin Zhigang Shao Fuel Cell System and Engineering Laboratory Key Laboratory of Fuel Cells&Hybrid Power SourcesDalian Institute of Chemical PhysicsChinese Academy of SciencesDalian 116023LiaoningChina University of Chinese Academy of Sciences Beijing 100049China

The design of the catalyst layer(CL)offers a feasible way to realize the commercialization of proton exchange membrane fuel cells(PEMFCs).An in-depth understanding of catalyst inks is critical to achieving the optimal CL structure and cell *** this work,the effects of the solvent evaporation process during ink drying on the formation of the CL microstructure are particularly considered to reveal the structure-property correlations among the catalyst ink,drying process,CL microstructure and fuel cell *** increase in the alcohol content of the catalyst ink increases the amount of free ionomers while allowing the ionomer backbone to be more stretched in the dispersion *** higher alcohol content contributes to rapid solvent evaporation and thus inhibits the formation of coffee rings;as a result,a more developed ionomer network with a denser pore structure is ***,the alcohol-rich electrode exhibits better proton conduction capability,but higher oxygen transport *** complex fuel cell operating conditions,a catalyst ink formulation with 50 wt%alcohol content is preferred due to its proper ionomer and pore size distribution,providing satisfactory fuel cell performance.

关键词： Proton exchange membrane Fuel cell Ink composition Ionomer distribution Pore structure Ink drying process

Exogeneous metal ions as therapeutic agents in cardiovascular disease and their delivery strategies

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Regenerative Biomaterials 2024年第2期3卷 1-16页

作者： xiaoqian hong Geer Tian Yang Zhu Tanchen ren Department of Cardiology of the Second Affliated Hospital and State Key Laboratory of Transvascular Implantation Devices Cardiovascular Key Laboratory of Zhejiang ProvinceZhejiang University School of MedicineHangzhou 310o09China Binjiang Institute of Zhejiang University Hangzhou 310053China MOE Key Laboratory of Macromolecular Synthesis and Functionalization Department of Polymer Science and EngineeringZhejiang UniversityHangzhou 310027China

Metal ions participate in many metabolic processes in the human body,and their homeostasis is crucial for *** cardiovascular diseases(CVDs),the equilibriums of metal ions are frequently interrupted,which are related to a variety of disturbances of physiological processes leading to abnormal cardiac *** supplement of metal ions has the potential to work as therapeutic strategies for the treatment of *** with other therapeutic drugs,metal ions possess broad availability,good stability and safety and diverse drug delivery *** delivery strategies of metal ions are important to exert their ther-apeutic effects and reduce the potential toxic side effects for cardiovascular applications,which are also receiving increasing *** local delivery strategies for metal ions based on various biomaterials are constantly being *** this review,we comprehensively summarized the positive roles of metal ions in the treatment of cVDs from three aspects:protecting cells from oxidative stress,inducing angiogenesis,and adjusting the functions of ion *** addition,we introduced the transferability of metal ions in vascular reconstruction and cardiac tissue repair,as well as the currently available engineered strategies for the precise delivery of metal ions,such as integrated with nanoparticles,hydrogels and scaffolds.

关键词： metal ions cardiovascular disease tissue engineering oxidative stress angiogenesis ion channel

Sepsis biomarkers： an omics perspective

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Frontiers of Medicine 2014年第1期8卷 58-67页

作者： xiao Liu Hui ren Daizhi Peng Institute of Burn Research Southwest Hospital State Key Laboratory of Trauma Burns and Combined Injury Third Military Medical University Chongqing 400038 China School of Nursing Third Military Medical University Chongqing 400038 China

Sepsis is a common cause of death in hospitalized patients worldwide. The early detection of sepsis remains a great challenge for clinicians, and delayed diagnosis frequently undermines treatment efforts, thereby contributing to high mortality. Omics technologies allow high-throughput screening of sepsis biomarkers. This review describes currently available and novel sepsis biomarkers in the context of genomics, transcriptomics, proteomics, and metabolomics. The combination of these technologies can help refine the diagnosis of sepsis. This review paper serves as a reference for future studies that employ an integrated, multi-omics approach to disease identification.

关键词： sepsis biomarker genomics transcriptomics proteomics metabolomics

Temperature Field for Improving Internal Quality of Stretched Round Billet

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Journal of Iron and Steel Research International 2009年第6期16卷 17-22页

作者： QIU Ping xiao hong Mechanical Engineering College Yanshan University Qinhuangdao 066004 Hebei China

Based on the rigid-plastic theory, using a coupled thermomechanical model, the stretching process of a circular section billet is simulated by means of FEM software Deform-2D. Through the distribution of internal stress fields of stretched round billet, it is found that the shear stress field is the main factor to induce Mannesmann＇s effect. The simulation results show that a reasonable distribution of the temperature field may improve the internal quality of the circular section billet in the stretching process.

关键词： stretching temperature field Mannesmann's effect simulation

Vectorial approximations of infinite-dimensional covariance descriptors for image classification

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Computational Visual Media 2017年第4期3卷 379-385页

作者： Jie-Yi ren xiao-Jun Wu School of Io T Engineering Jiangnan UniversityWuxi 214122China

The class of symmetric positive definite(SPD)matrices,especially in the form of covariance descriptors(Cov Ds),have been receiving increased interest for many computer vision *** descriptors offer a compact way of robustly fusing different types of features with measurement *** examples of applying Cov Ds addressing various classification problems

关键词： covariance infinite Riemannian symmetric matrices applying dimensionality classifier Euclidean kernel

胶原蛋白肽-焦磷酸铁复合物的构建及其补铁效果评价

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陕西科技大学学报 2025年第1期43卷 29-34页

作者：刘宁王薇贺人杰姚晓琳张琨福格森(武汉)生物科技股份有限公司湖北武汉430056 陕西科技大学食品科学与工程学院陕西西安710021

铁复合物是一种将铁元素与食品大分子结构进行组装的新型铁强化剂,具有化学稳定性和生物利用度高的优点.本课题采用均质、超声和透析处理,在焦磷酸铁(FP)的合成过程中,引入胶原蛋白肽(CPs).红外光谱测定发现,该方法成功制得CPs-FP复合物... 详细信息

铁复合物是一种将铁元素与食品大分子结构进行组装的新型铁强化剂,具有化学稳定性和生物利用度高的优点.本课题采用均质、超声和透析处理,在焦磷酸铁(FP)的合成过程中,引入胶原蛋白肽(CPs).红外光谱测定发现,该方法成功制得CPs-FP复合物.与FP相比,CPs-FP的胃肠释放率提高.缺铁性贫血大鼠实验表明,CPs-FP能够有效改善大鼠体重、血红蛋白含量、组织铁含量和其他指数,呈现浓度依赖效应.同等剂量下,CPs-FP复合物具有更高的生物利用度.

关键词：焦磷酸铁胶原蛋白肽铁复合物胃肠消化缺铁性动物

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Luminescent nanoscale metal–organic frameworks for chemical sensing

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Chinese Chemical Letters 2015年第12期26卷 1439-1445页

作者： xiao-Yan ren Le-Hui Lu State Key Laboratory of Electroanalytical Chemistry Changchun Institute of Applied Chemistry Chinese Academy of Sciences

Metal–organic frameworks（MOFs） are a fascinating class of crystalline materials constructed from selfassembly of metal cations/clusters and organic ligands. Both metal and organic components can be used to generate luminescence, and can further interact via antenna effect to increase the quantum yield,providing a versatile platform for chemical sensing based on luminescence emission. Moreover, MOFs can be miniaturized to nanometer scale to form nano-MOF（NMOF） materials, which exhibit many advantages over conventional bulk MOFs in terms of the facile tailorability of compositions, sizes and morphologies, the high dispersity in a wide variety of medium, and the intrinsic biocompatibility. This review will detail the development of NMOF materials as chemical sensors, including the synthetic methodologies for designing NMOF sensory materials, their luminescent properties and potential sensing applications.

关键词： luminescent nanometer luminescence crystalline facile sizes fascinating microemulsion nucleation encapsulation