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Synthesis and characterization of novel poly(aryl ether sulfone ketone)s containing phthalazinone and biphenyl moieties

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Chinese Chemical Letters 2008年第2期19卷 227-229页

作者： li hong xiao Cheng liu Xi Gao Jian Department of Polymer Science ＆ Materials Dalian University of Technology Dalian 116012 China liaoning High Performance Resin Engineering Research Center Dalian 116012 China

A novel series of poly（aryl ether sulfone ketone）s （PPESKs） containing phthalazinone and biphenyl moieties were prepared by two-step nucleophilic polycondensation reaction. The ^-Mw values of these copolymers were between 38,330 and 67,900. The glass transition temperatures （Tg） and 5% decomposition temperatures were ranged in 253-269 ℃ and 488-500 ℃, respectively, The structures of these copolymers were confirmed by FT-IR and ^1H NMR. Moreover, all the resultant copolymers were amorphous determined by wide angle X-ray diffraction （WAXD）.

关键词： Poly(aryl ether sulfone ketone) Phthalazinone Biphenyl Thermal property Solubility

腰椎管狭窄症患者的步行速度与术后疼痛灾难化的相关性

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颈腰痛杂志 2024年第3期45卷 455-458页

作者：王瑶郭宗晓洪小丽陈志刚南通大学附属海安市人民医院骨科江苏南通226600

目的探讨腰椎管狭窄症(LSS)患者的步行速度(步速)与术后疼痛灾难化(PC)的相关性。方法选择2018年1月至2021年12月于该院接受手术治疗的93例LSS患者作为研究对象,收集患者术前、术后3个月、术后6个月、术后12个月时的疼痛灾难化评分(P... 详细信息

目的探讨腰椎管狭窄症(LSS)患者的步行速度(步速)与术后疼痛灾难化(PC)的相关性。方法选择2018年1月至2021年12月于该院接受手术治疗的93例LSS患者作为研究对象,收集患者术前、术后3个月、术后6个月、术后12个月时的疼痛灾难化评分(PCS)、步速、疼痛数字评分量表(NRS)评分、日本骨科协会(JOA)评分,观察术后3个月、术后6个月、术后12个月时PCS与步速的关系。结果术后12个月时,患者无助、放大、沉思等维度及PCS总得分均较术前显著降低(P<0.05)。术后12个月时,患者步速、JOA评分均较术前显著升高,差异有统计学意义(P<0.05);术后12个月时,患者腿痛NRS、腰痛NRS均较术前显著降低(P<0.05)。Pearson相关性分析显示,患者术前、术后3个月、术后6个月、术后12个月时的PCS与步速和JOA评分均呈显著负相关(P<0.05),PCS与腿痛NRS、腰痛NRS均呈显著正相关(P<0.05)。多元线性回归分析显示,术后3个月、术后6个月、术后12个月时的PCS与步速均呈负相关性(P<0.05)。结论 LSS患者术后1年内PC与步速呈显著负相关,步行速度评估对于术后疼痛的管理可能具有重要指导作用。

关键词：腰椎管狭窄症疼痛灾难化步行速度相关性

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Numerical simulation of protection range in exploiting the upper protective layer with a bow pseudo-incline technique

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Mining Science and Technology 2009年第1期19卷 58-64页

作者： HU Guo-zhong WANG hong-tu li xiao-hong FAN xiao-gang YUAN Zhi-gang Key Lab for Exploitation of China Southwestern Resources ＆ Environmental Disaster Control Engineering Ministry of Education Chongqing University Chongqing 400030 China

The developing processes of stress and deformation fields of a protected layer after mining an upper-protective layer with a bow pseudo-incline technique were simulated to locate the protection region. The pressure relief of the protected layer was analyzed after mining the upper-protective layer. The pressure relief angle along the strike and incline were located according to the roles of protection of the deformation and stress pressure-relief of the protective layer after mining. This results show that the upper-protective layer with the bow pseudo-incline technique have an upper and downside pressure relief angle of 85 and 68 degrees respectively; the distribution of strike pressure relief angles along the pseudo-incline working face is uneven and their values range from 38.3 to 51 degrees. The pressure relief angle of the inclined middle location was the largest. The distribution of the protection region of the upper-protective layer with the bow pseudo-incline teelmique located by practical tests and numerical simulation is essentially consistent, compared with the results obtained by these methods.

关键词： bow pseudo-incline technique upper-protective layer protection region 3D numerical simulation

ELECTROSTATIC INTERACTION HYBRIDS FROM WATER-BORNE CONDUCTIVE POLYANIliNE AND INORGANIC PRECURSOR CONTAINING CARBOXYL GROUP

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Chinese Journal of Polymer Science 2007年第2期25卷 181-186页

作者： Jing Luo Xian-hong Wang Ji li xiao-jiang Zhao Fo-song Wang State Key Laboratory of Polymer Physicsand Chemistry Changchun Institute of Applied Chermstry Graduate School of Chinese Academy of Sciences Changchun 130022 China

Electrostatic interaction conductive hybrids were prepared in water/ethanol solution by the sol-gel process from inorganic sol containing carboxyl group and water-borne conductive polyaniline （cPANI）. The electrostatic interaction hybrids film displayed 1-2 orders of magnitude higher electrical conductivity in comparison with common hybrids film, showing remarkable conductivity stability against water soaking. Most strikingly, it displayed ideal electrochemical activity even in a solution with pH = 14, which enlarged the conducting polyaniline application window to strong alkaline media.

关键词： Water-borne conductive polyaniline Sol-gel Electrostatic interaction.

A new aryltetrahydronaphthalene lignan from Epimedium brevicornum

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Chinese Chemical Letters 2011年第1期22卷 85-87页

作者： Hai Zhou li Guo Jun Luo hong Mei li xiao Lei li Rong Tao li The college of life Science and Technology Kunming University of Science and Technology Kunming 650224 China

A new aryltetrahydronaphthalene lignan, （＋）-cycloolivil formaldehyde condensate （1）, was isolated from the whole plants of Epimedium brevicornum （Berberidaceae）. Its structure was elucidated on the basis of MS,... 详细信息

关键词： Epimedium brevicornum lignan Cycloolivil formaldehyde condensate

Phase equilibria of low-Y side in Mg-Zn-Y system at 400℃

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Rare Metals 2020年第3期39卷 262-269页

作者： Bo-Shu liu hong-xiao li Yu-Ping Ren Min Jiang Gao-Wu Qin Key Laboratory for Anisotropy and Texture of Materials Ministry of EducationNortheastern UniversityShenyang110819China

Phase equilibrium relations of the Mg-Zn-Y system in the low-Y side at 400℃were investigated by alloy-equilibrated method,combined with thermal *** results show that there is a liquid phase which could be in equilibrium with an a-Mg solid solution and an icosahedral quasicrystal I phase in the low-Y side of the Mg-Zn-Y system at 400℃.The liquid phase region originates from the binary Mg-Zn system and extends to 0.4 at%Y in the Mg-Zn-Y ***,the hexagonal structure H phase,fee W phase and LPSO phase(X phase)are in equilibrium with *** Y/Zn(atomic ratio,the same as follows)increasing,there exist four three-phase regions consisting of I+liquid+α-Mg,I+H+α-Mg,H+W+α-Mg and W+X+α-Mg,respectively,in the low-Y side of the isothermal section at 400℃.The twophase region a-Mg+I phase exists between I+H+aMg and I+liquid+*** this two-phase region,the Y/Zn ratio is in the range of 0.14-0.17;and a three-phase region of a-Mg+I phase+H phase appears when Y/Zn ratio comes up to *** I but W phase is in equilibrium with a-Mg,when Y/Zn ratio>*** system is in liquid-state phase equilibrium,when Y/Zn ratio<0.14.

关键词： Mg-Zn-Y system Phase equilibrium Icosahedral quasicrystal phase Solid solubility

Effect of oxide inclusions on MnS precipitates and tensile mechanical property of high-strength low-alloy steel

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Journal of Iron and Steel Research International 2024年第5期31卷 1210-1220页

作者： xiao-yong Gao hong Wei li-feng Zhang School of Mechanical Engineering Yanshan UniversityQinhuangdao066004HebeiChina School of Materials Science and Engineering Yanshan UniversityQinhuangdao066004HebeiChina School of Mechanical and Materials Engineering North China University of TechnologyBeijing100144China

The key role of oxide inclusions on the microstructure and mechanical property of a high-strength low-alloy steel was *** field emission scanning electron microscope equipped with energy-dispersive spectrometry was used to characterize MnS *** inclusions play an important role in the shape control of MnS *** oxides fovored to decrease the size and the aspect ratio of MnS *** less oxide inclusions in the steel,approximately over 16.7%MnS precipitates were with aspect ratio a>5 and pure MnS precipitates accounted for 75.9%in ***,with more oxide inclusions in the steel,only 7.4%MnS precipitates were with a>5 and pure MnS precipitates accounted for 60.1%in *** of MnS by oxide inclusions improved the strength and inhibited the *** oxide inclusions in the steel increased the yield strength and tensile strength of the steel in both longitudinal and transverse directions,and lowered the anisotropy of the mechanical property.

关键词： High-strength low-alloy steel MnS Oxide inclusion Mechanical property Anisotropy

优化农户对玉米秸秆资源化利用行为的问题研究

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玉米科学 2024年第5期32卷 112-118页

作者：吕智超孙日丹洪小丽刘歆赵宇孙学奇闫晓刚张云影张彬赵蔚吉林省经济管理干部学院长春130012 吉林省农业科学院长春130033 松原市农业技术推广总站松原138000

吉林省2023年可收集玉米秸秆量为2704.42万t,资源利用率不到50%,呈现秸秆废弃和焚烧零星分散化趋势,造成资源浪费与生态污染。农户是玉米秸秆处理的第一主体。通过对吉林省(市)、县玉米秸秆利用现状的调查问卷统计,分析阐述玉米秸秆利... 详细信息

吉林省2023年可收集玉米秸秆量为2704.42万t,资源利用率不到50%,呈现秸秆废弃和焚烧零星分散化趋势,造成资源浪费与生态污染。农户是玉米秸秆处理的第一主体。通过对吉林省(市)、县玉米秸秆利用现状的调查问卷统计,分析阐述玉米秸秆利用不合理的影响因素,包括农户认知、成本、玉米秸秆利用渠道和补贴等因素,基于对资源化利用偏好模型的研究,对优化农户玉米秸秆资源化利用提出建议。

关键词：玉米秸秆资源化利用主体行为

Two new megastigmane O-glucopyranosides from the leaves of Broussonetia papyrifera

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Chinese Chemical Letters 2007年第12期18卷 1518-1520页

作者： Wei Sheng Feng hong Wei li xiao Ke Zheng Sui Qing Chen Henan College of Traditional Chinese Medicine Zhengzhou 450008 China

Two new megastigmane O-glucopyranosides, named （2R,3R,5R,6S,9R）-3-hydroxy-5,6-epoxy-β-ionol-2-O-β-D-glucopyrano- side （1） and （2R,3R,5R,6S,9R）-3-hydroxyl-5,6-epoxy-acety-β-ionol-2-O-β-D-glucopyranoside （2） together with six known mega- stigmanes, were isolated from the leaves of Broussonetia papyrifera （linn.） Vent. Their structures were established by chemical methods and spectroscopic techniques including 2D NMR.

关键词： Broussonetia papyrifera Megastigmane O-glucopyranosides