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Theoretical studies of carbenes and carbenoids *** and isomerizations of carbenoid H2C=CLiF

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Chinese Journal of Chemistry 1988年第4期6卷 294-301页

作者： Deng Cong‐hao Wang Bing‐Ze Xu lin‐Xiao Department of Chemistry Shandong University Jinan Department of Chemistry Fudan University Shanghai

The vinylidene carbenoid HC=CLiF is studied with RHF/STO-3G gradient *** equilibrium states and their isomerization transition states are *** lowest energystructure 1 should be detectable in the *** Li and F lie at the same side of C=C bondis a remarkable feature of *** dipole moments,MuUiken populations and frontier molecular or-bitals are also given and analyzed.

关键词： Theoretical studies of carbenes and carbenoids 2.Structures and isomerizations of carbenoid H2C HOMO

THERMAL AND MECHANICAL PROPERTIES OF POLYLACTIDE TOUGHENED WITH A BUTYL ACRYLATE-ETHYL ACRYLATE-GLYCIDYL METHACRYLATE COPOLYMER

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Chinese Journal of Polymer Science 2013年第11期31卷 1519-1527页

作者： Yan-ping hao Huan-huan Ge Li-jing Han 张会良 Li-song Dong Shu-lin Sun Key Laboratory of Polymer Ecomaterials Chinese Academy of SciencesChangchun Institute of Applied Chemistry Changchun University of Technology

In this work, a specific polylactide （PLA） 4032D was melt-mixed with a new toughener： butyl acrylate （BA）, ethyl acrylate （EA） and glycidyl methacrylate （GMA） copolymer （BA-EA-GMA）. DMA tests showed that PLA/BA-EA-GMA blends were partially miscible. The degree of crystallinity of PLA increased while the cold crystallization temperature shifted to higher temperatures with increasing BA-EA-GMA content. The SEM micrographs showed that PLA/BA-EA-GMA blends had a good dispersion and this phenomenon was in good agreement with their higher impact strength. The result showed that the adding of BA-EA-GMA has enhanced the flexibility of PLA/BA-EA-GMA blends as compared with pure PLA. The impact strength was changed from 3.4 kJ/m2 for pure PLA to 29.6 kJ/m2 for 80/20 PLA/BA-EA-GMA blend.

关键词： Polylactide Thermal properties Mechanical properties.

Volatilization behaviour and volatilization kinetics of CaF2-Na2O-CaOSiO2-Al2O3-MgO-B2O3 synthetic mould flux

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Journal of Iron and Steel Research International 2019年第4期26卷 412-421页

作者： Ya-ru Cui hao-yue Fan Zi-liang Guo Guo-hua Wang Xiao-ming Li Jun-xue Zhao Ze Yang School of Metallurgical Engineering Xi'an University of Architecture and TechnologyXi'an 710055ShaanxiChina Inner Mongolia Xinchuang Resources Recycling Co. Ltd.Ordos 014300Inner MongoliaChina

To reduce the volatilization of the volatile-containing slags and obtain accurate measurement results of slag performance,the volatility degree and deviation mechanism must be ***-isothermal thermogravimetric analysis at different heating rates was used to establish the volatilization kinetic model,and it reveals the volatilization mechanism of CaF2-Na2O-CaO-SiO2-Al2O3-MgO-B2O3 synthetic sodium-containing fluoride mould *** results demonstrated that the evaporation of NaF and SiF4 was the decisive factor that led to the change in composition and deviation of properties of the tested *** most probable kinetic mechanism function for the evaporation of volatile component from sodiumcontaining fluoride mould flux could be expressed by g(α)=[—ln(1-α)]^2/3,with an apparent activation energy of 164.866 kJ mol^-1 and pre-exponential factor of 2.13×10^-4 s^-1,where α is the conversion rate at any time step in the volatilization *** reaction mechanism was random nucleation followed by growth,which was the limiting factor for the volatilization of synthetic sodium-containing fluoride mould *** method of increasing heating rate and adding protection gas in the measurement system will help to obtain more accurate results of slag performance.

关键词： Fluoride Slag performance Volatilization kinetics Thermogravimetric analysis Mechanism function

Atomic scale electronic structure of the ferromagnetic semiconductor Cr2Ge2Te6

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Science Bulletin 2018年第13期63卷 825-830页

作者： Zhenqi hao Haiwei Li Shunhong Zhang Xintong Li Gaoting lin Xuan Luo Yuping Sun Zheng Liu Yayu Wang State Key Laboratory of Low Dimensional Quantum Physics Department of PhysicsTsinghua UniversityBeijing 100084China Institute for Advanced Study Tsinghua UniversityBeijing 100084China Key Laboratory of Materials Physics Institute of Solid State PhysicsChinese Academy of SciencesHefei 230031China University of Sdence and Technology of China Hefei 230026China e High Magnetic Field LaboratoryChinese Academy of SciencesHefei 230031China High Magnetic Field Laboratory Chinese Academy of SdencesHefei 230031China Collaborative Innovation Centre of Advanced Microstructures Nanjing UniversityNanjing 210093Chinag Collaborative Innovation Center of Quantum Matter Beijing 100084China

Cr_2Ge_2Te_6is an intrinsic ferromagnetic semiconductor with van der Waals type layered structure,thus represents a promising material for novel electronic and spintronic *** we combine scanning tunneling microscopy and first-principles calculations to investigate the electronic structure of Cr_2Ge_2Te_*** spectroscopy reveals a surprising large energy level shift and change of energy gap size across the ferromagnetic to paramagnetic phase transition,as well as a peculiar double-peak electronic state on the Cr-site *** features can be quantitatively explained by density functional theory calculations,which uncover a close relationship between the electronic structure and magnetic *** findings shed important new lights on the microscopic electronic structure and origin of magnetic order in Cr_2Ge_2Te_6.

关键词： Ferromagnetic semiconductor Electronic structure Scanning tunneling microscopy Density functional theory

EBSD Study of Microstructural and Textural Changes of Hot-Rolled Ti–6Al–4V Sheet After Annealing at 800 ℃

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Acta Metallurgica Sinica(English Letters) 2018年第11期31卷 1215-1223页

作者： Ji-Ying Xia lin-Jiang Chai hao Wu Yan Zhi Yin-Ning Gou Wei-Jiu Huang Ning Guo College of Materials Science and Engineering Chongqing University of Technology Faculty of Materials and Energy Southwest University

In this paper, electron backscatter diffraction and various other characterization and analysis techniques mclucilng X-raydiffraction, electron channeling contrast imaging and energy-dispersive spectrometry were jointly employed to investigatemicrostructural and textural changes of a hot-rolled Ti-6A1-4V （TC4） sheet after annealing at 800 ℃ for 5 h. In addition,the hardness variation induced by the annealing treatment is rationalized based on revealed microstructural and texturalcharacteristics. Results show that the TC4 sheet presents a typical dual-phase （α＋β） microstructure, with α-Ti as themajor phase and short-rod-shaped β-Ti （minority） uniformly distributed throughout the α matrix. Most of α grains cor-respond to the un-recrystallized structures with a typical rolling texture （c//TD and 〈11-20〉//ND） and dense low angleboundaries （LABs）. After the annealing, the stored energy in the as-received specimen is significantly reduced, along withgreatly decreased LABs density. Also, the annealing allows recrystallization and grain growth to occur, leading toweakening of the initial texture. Furthermore, the water quenching immediately after the annealing triggers martensitictransformation, which makes the high-temperature β phases be transformed into submicron α plates. The hardness of theannealed specimen is 320.5 HV, lower than that （367.0 HV） of the as-received specimen, which could be attributed toreduced LABs, grain growth and weakened texture. Nevertheless, the hardening effect from the fine martensitic platescould help to suppress a drastic hardness drop.

关键词： Ti alloy Electron backscatter diffraction Recrystallization Texture - Hardness

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卤代硝基苯高选择性加氢催化剂研究进展

现代化工 2024年第5期44卷 54-58,65页

作者：徐洋张慧敏顾逸涛陆林巍梁金花任晓乾南京工业大学化工学院江苏南京211816 南京工业大学生物与制药工程学院江苏南京211816

综述了近年来卤代硝基苯液相催化加氢非均相催化剂的研究进展,包括贵金属催化剂和非贵金属催化剂,并对其抑制脱卤的机理进行了阐述,最后对未来卤代硝基苯催化加氢催化剂的研究进行了展望。

关键词：卤代硝基苯卤代苯胺催化加氢选择性催化剂

Nonswellable hydrogels with robust micro/nano-structures and durable superoleophobic surfaces under seawater

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Science China Chemistry 2018年第1期61卷 64-70页

作者： ling lin Hui Yi Xinglin Guo Pengchao Zhang Lie Chen Dezhao hao Shutao Wang Mingjie Liu Lei Jiang Engineering Research Center of Marine Biological Resource Comprehensive Utilization State Oceanic Administration (SOA) the Third Institute of Oceanography of the State Oceanic Administration Xiamen 361005 China Key Laboratory of Bio-inspired Smart Interfacial Science and Technology of Ministry of Education School of Chemistry and Environment Beihang University Beijing 100191 China Key Laboratory of Green Printing Institute of Chemistry Chinese Academy of Sciences Beijing 100191 China Laboratory of Bio-inspired Smart Interface Science Technical Institute of Physics and Chemistry Chinese Academy of Sciences Beijing 100191 China

Hydrogels, composed mainly of water trapped in three dimensional cross-linked polymer networks, have been widely utilized to construct underwater superoleophobic surfaces. However, the swelling nature and instability of hydrogels under complex marine environment will weaken their underwater superoleophobicity. Herein, we synthesize structured poly （2-hydroxyethylmethacrylate）（PHEMA） hydrogels by using sandpaper as templates. The robust non-swelling of PHEMA hydrogel ensures that micro/nano-structures on the surface of PHEMA hydrogels can be well maintained. Moreover, when roughness Ra of about 3-4 bun, the surface has superior oil-repellency. Additionally, even after immersing in seawater for one-month, their breaking strength and toughness can be well kept. The non-swellable hydrogels with long-term stable under seawater superoleophobicity will promote the development of robust superoleophobic materials in marine antifouling coatings, biomedical devices and oil/water separation.

关键词： bio-inspired underwater superoleophobic micro/nano-structures nonswellable hydrogel mechanical strength

Progress in pathogenesis and treatment of type A hepatic encephalopathy in acute liver failure:a comprehensive review

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Pharmacology Discovery 2024年第1期4卷 1-11页

作者： Ye-Xin Xu He Wang Kang-Rui Hu Bo-Yu Shen lin Xie Guang-Ji Wang Yan liang Key Lab of Drug Metabolism&Pharmacokinetics State Key Laboratory of Natural MedicinesChina Pharmaceutical UniversityNanjing 210009China

Hepatic encephalopathy is a serious neuropsychiatric complication caused by liver failure,which is characterized by the development of cognitive and motor disorders into ***,hepatic encephalopathy can be divided into three types(A,B,and C)according to the *** A hepatic encephalopathy(AHE)caused by acute liver failure seriously affects the prognosis of patients,ranging from mild neuropsychological changes to coma,brain edema,and even *** far,the research on the pathogenesis of AHE has focused on the toxic effects of ammonia on the central nervous system,metabolic disorders(glutamine and lactate accumulation),neurotransmission alteration,systemic inflammation,especially *** these mechanisms are not independent,but mutually have synergistic *** clinic,treatment of AHE based on only one mechanism is often *** clarify the pathogenesis and the interaction among the mechanisms will be beneficial to the effective treatment of AHE and reduce the *** aim of this review is to provide comprehensive scientific evidence for the clinical treatment of AHE via collecting and analyzing the latest mechanism of AHE,and clarifying the relationship among these mechanisms combing the investigation of the latest research progress of drug treatment of acute liver ***,we find that the pathogenesis of AHE is a complex neurocognitive disorder shaped by interactions among hyperammonemia,inflammation,and changes in neurotransmission,the signaling pathways thereby integrating the inflammatory and neurological inputs to impact pathophysiological or neurobehavioral outcomes.

关键词： type A hepatic encephalopathy ammonia glutamine lactate,inflammation,blood-brain barrier,neurotransmission

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飞行器结构健康监测技术研究进展

航空制造技术 2024年第13期67卷 41-67,98页

作者：田童李建乐邓德双曾旭林奎旭董珊珊杨雷徐浩杨正岩武湛君大连理工大学力学与航空航天学院大连116024 大连理工大学材料科学与工程学院大连116024 江南大学无锡214122

结构健康监测技术有望在飞行器设计、服役和维护中发挥关键作用,提高飞行器结构效率,确保飞行器结构的安全性和可靠性。本文首先概述结构健康监测的基本概念及其适用范围,强调其在航空航天领域中的重要性。随后,针对结构健康监测技术在... 详细信息

结构健康监测技术有望在飞行器设计、服役和维护中发挥关键作用,提高飞行器结构效率,确保飞行器结构的安全性和可靠性。本文首先概述结构健康监测的基本概念及其适用范围,强调其在航空航天领域中的重要性。随后,针对结构健康监测技术在飞行器典型结构中的研究工作情况,重点围绕冲击监测、超声导波损伤监测以及光纤传感器应变监测等先进技术进行详细讨论,总结国内外研究现状、技术能力以及典型应用。最后,指出飞行器结构健康监测面临的挑战性问题,展望该技术在航空航天领域的应用前景。

关键词：结构健康监测(SHM) 冲击监测超声导波光纤光栅分布式光纤损伤诊断