检索结果-南通市图书馆

Exploration of Strong Metal-Support Interaction in Heterogeneous Catalysts by in situ Transmission Electron Microscopy

引用

Chinese Journal of Chemistry 2024年第9期42卷 1004-1008页

作者： Yongjun Jiang Sheng Dai Key Laboratoryfor Advanced Materials and Feringa Nobel Prize Scientist Joint Research Center Institute of Fine ChemicalsSchool of Chemistry&Molecular EngineeringEast China Universityof Science and TechnologyShanghai 200237China

The phenomenon of strong metal-support interaction(SMSI)observed in supported metal catalysts,usually accompanied by the formation of the encapsulation layer on metal nanoparticles,has attracted extensive research attention due to its significance in heterogeneous catalysis.Notably,great progress has been made in recent years in investigating SMSI by in situ transmission electron microscopy(TEM),along with an enhanced comprehension of the underlying mechanisms governing SMSI formation.This emerging topic summarizes recent progress utilizing in situ TEM to study the interaction between metal and support and the relationship between the structure and performance of the supported catalyst under reaction conditions.A brief perspective about the use of in situ TEM for further study of SMSI is also presented,showing prospects in this field that will stimulate further upsurging research in promoting the catalytic efficiency of supported catalysts.

关键词： Heterogeneous catalysis In situ TEM Strong metal-support interaction structure changes Interfaces Structural evolution

来源：

维普期刊数据库评论

在线全文

维普期刊数据库

学校读者我要写书评

暂无评论

On the structural controllability of distributed systems with local structure changes

引用

Science China(Information Sciences) 2018年第5期61卷 226-238页

作者： Jianbin MU Shaoyuan LI Jing WU Key Laboratory of System Control and Information Processing Ministry of Education of ChinaDepartment of Automation Shanghai Jiao Tong University

This paper analyzes the structural controllability of distributed systems, which are composed of many subsystems and have complicated interconnections. Different from traditional methods in centralized systems where global information is required, the method proposed in this paper is based on local structural properties and simplified interconnections, by which the computational burden is highly decreased and the implementation is tractable. Moreover, a necessary condition for global structural controllability is obtained by combining local information. When the structure in any subsystems is changed, only corresponding local information needs to be re-evaluated instead of whole distributed systems, which makes the analysis easier.Finally, examples are given to illustrate the effectiveness of our proposed method.

关键词： structural controllability distributed systems subsystems structure changes graph theory

来源：

同方期刊数据库评论

在线全文

同方期刊数据库

学校读者我要写书评

暂无评论

The effect of protein oxidation on the formation of advanced glycation end products after chicken myofibrillar protein glycation

引用

Food Science and Human Wellness 2023年第5期12卷 1571-1579页

作者： Zongshuai Zhu Anthony Pius Bassey Ming Huang Iftikhar Ali Khan College of Food Science and Technology Nanjing Agricultural UniversityNanjing 210095China National R&D Center for Poultry Processing Technology Nanjing Huangjiaoshou Food Science and Technology Co.Ltd.Nanjing 211200China Institution of Agricultural Products Processing Jiangsu Academy of Agricultural SciencesNanjing 210095China

Investigation that protein oxidation to the formation of advanced glycation end products(AGEs)after chicken myofibrillar protein glycation is limited.Models of protein oxidation induced by different concentrations of hydroxyl radicals(·OH)were developed after the chicken myofibrillar protein mild glycation(MPG).Results exhibited that levels of AGEs and surface hydrophobicity(H_(0))steadily increased with the a ddition of h ydrogen peroxide(H_(2)O_(2))concentration.However,levels of s ulfhydryl group,free amino group,and particle size gradually decreased with the H_(2)O_(2)concentration.The protein carbonyl value increased in H_(2)O_(2)concentration until 10 mmol/L.Pearson's correlation indicated that MPG structure modification(unfolding and degradation)induced by protein oxidation were significantly positively correlated with AGEs concentration(P<0.05).Finally,a mechanism was proposed to hypothesize t he effect of protein oxidation on the formation of AGEs under MPG conditions.

关键词： Protein oxidation Glycated myofibrillar protein structure changes Advanced glycation end products

来源：

维普期刊数据库

同方期刊数据库评论

在线全文

学校读者我要写书评

暂无评论

Effects of Mechanical Activation Methods on Thermo-oxidation Behaviors of Pyrite

引用

Journal of Wuhan University of Technology(Materials Science) 2015年第5期30卷 974-980页

作者：李欣 CHEN Zilin 陈先锋 ZHANG Ying NIU Yi School of Resources and Environmental Engineering Wuhan University of Technology

To explore the effects of mechanical activation methods(ball mill, planetary mill and rod mill) on the oxidation and the spontaneous combustion of pyrite, the kinetic curves of non-activated pyrite and mechanically activated pyrite were created by simultaneous thermal analysis. The structural characteristics and changes of mechanically activated pyrite were investigated by X-ray diffraction and SEM, and the relationship between the mean diameter and the grinding time was obtained by using a laser particle size analyzer. The kinetic model of pyrite and the kinetic parameters were deduced using Bagchi method. The relationship between the kinetic parameters indicates that, pyrite activated by ball milling shows the best thermal stability at the same diameter. By comparing and analyzing the X-ray diffraction patterns, results show that different mechanical activation ways played different roles in structural changes of pyrite.

关键词： pyrite thermo-oxidation behaviors mechanical activation structure changes

来源：

维普期刊数据库

同方期刊数据库评论

在线全文

学校读者我要写书评

暂无评论

Coexistence of multi-attractor in small genetic regulatory networks

Coexistence of multi-attractor in small genetic regulatory n...

引用

第三十九届中国控制会议

作者： Guang Ling Ming-Feng Ge Fu-Yan Hu Yonghong Wu School of Science Wuhan University of Technology School of Mechanical Engineering and Electronic Information China University of Geosciences

The dynamics of living things are obviously complicated. Genetic regulatory networks of organisms have the capacity to show various attractor phenotypes. This paper focus on the coexistence of multiple types of attractors in a simple tri-node genetic motif. We discuss the coexistence of multiple equilibriums for the genetic motif and establish the stability criteria for each equilibrium. The dynamic display of the genetic motif depends on different biochemical parameters and initial conditions.It is proved that the motif at least exists a point attractor for sure, and the point attractor is so special that it is also a structure switching attractor. The topology of the tri-node motif will change into a two-node negative feedback loop under right initial conditions. Besides, the motif may also have other types of attractors（periodic and chaotic attractors） under some biochemical parameters. Several numerical simulations are illustrated to deepen our insight.

关键词： Genetic regulatory networks Multi-attractor structure changes Stability criteria Saddle-node bifurcation

来源： cnki会议评论

在线全文

cnki会议

学校读者我要写书评

暂无评论

欢迎您,

建议与咨询留下您的常用邮箱和电话号码，以便我们向您反馈解决方案和替代方法

时间限定

文献类型

馆藏选择

核心期刊

语言

文献类型

帮助

文字说明：

检索规则说明：

检索范例：

分类表

所选分类

限定检索结果

文献类型

馆藏范围

日期分布

学科分类号

主题

机构

作者

语言

在线全文

在线全文

在线全文

在线全文

在线全文

请选择保存的检索档案：

请选择收藏分类：

通借通还

欢迎您,

建议与咨询 留下您的常用邮箱和电话号码，以便我们向您反馈解决方案和替代方法

时间限定

文献类型

馆藏选择

核心期刊

语言

文献类型

帮助

文字说明：

检索规则说明：

检索范例：

分类表

所选分类

限定检索结果

文献类型

馆藏范围

日期分布

学科分类号

主题

机构

作者

语言

在线全文

在线全文

在线全文

在线全文

在线全文

请选择保存的检索档案： 新增检索档案 确定 取消

请选择收藏分类： 新增自定义分类 确定 取消

通借通还

建议与咨询留下您的常用邮箱和电话号码，以便我们向您反馈解决方案和替代方法

请选择保存的检索档案：

请选择收藏分类：