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Prediction of the thermal conductivity of Mg–Al–La alloys by CALPHAD method

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International Journal of Minerals,Metallurgy and Materials 2024年第1期31卷 129-137页

作者： hongxia Li Wenjun Xu Yufei zhang Shenglan Yang Lijun zhang Bin Liu Qun Luo Qian Li State Key Laboratory of Advanced Special Steels&Shanghai Key Laboratory of Advanced Ferrometallurgy&School of Materials Science and Engineering Shanghai UniversityShanghai 200444China National Engineering Research Center for Magnesium Alloys Chongqing UniversityChongqing 400044China State Key Laboratory of Powder Metallurgy Central South UniversityChangsha 410083China College of Materials Science and Engineering Chongqing UniversityChongqing 400044China National Key Laboratory of Advanced Casting Technologies Chongqing UniversityChongqing 400044China

Mg-Al alloys have excellent strength and ductility but relatively low thermal conductivity due to Al *** accurate prediction of thermal conductivity is a prerequisite for designing Mg-Al alloys with high thermal ***,databases for predicting temperature-and composition-dependent thermal conductivities must be *** this study,Mg-Al-La alloys with different contents of Al2La,Al3La,and Al11La3phases and solid solubility of Al in the α-Mg phase were *** influence of the second phase(s) and Al solid solubility on thermal conductivity was *** results revealed a second phase transformation from Al_(2)La to Al_(3)La and further to Al_(11)La_(3)with the increasing Al content at a constant La *** degree of the negative effect of the second phase(s) on thermal diffusivity followed the sequence of Al2La>Al3La>Al_(11)La_(3).Compared with the second phase,an increase in the solid solubility of Al in α-Mg remarkably reduced the thermal *** the basis of the experimental data,a database of the reciprocal thermal diffusivity of the Mg-Al-La system was established by calculation of the phase diagram (CALPHAD)*** a standard error of±1.2 W/(m·K),the predicted results were in good agreement with the experimental *** established database can be used to design Mg-Al alloys with high thermal conductivity and provide valuable guidance for expanding their application prospects.

关键词： magnesium alloy thermal conductivity thermodynamic calculations materials computation

高分散性活性剂SA-800在胎面胶中的应用

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橡胶科技 2024年第5期22卷 258-262页

作者：于晓波张红霞李龙赵国苏本超怡维怡橡胶研究院有限公司山东青岛266045 青岛市轮胎新材料重点实验室山东青岛266045 思通检测技术有限公司山东青岛266045

研究高分散性活性剂SA-800(简称SA-800)等氧化锌含量(简称等锌)或减氧化锌含量(简称减锌)替代普通氧化锌在胎面胶中的应用。结果表明:SA-800等锌替代普通氧化锌时,胎面胶的焦烧时间和正硫化时间延长,加工安全性好,其他性能基本相当,可... 详细信息

研究高分散性活性剂SA-800(简称SA-800)等氧化锌含量(简称等锌)或减氧化锌含量(简称减锌)替代普通氧化锌在胎面胶中的应用。结果表明:SA-800等锌替代普通氧化锌时,胎面胶的焦烧时间和正硫化时间延长,加工安全性好,其他性能基本相当,可在丁苯橡胶/顺丁橡胶/白炭黑胎面胶和天然橡胶/炭黑胎面胶中替代普通氧化锌;SA-800减锌替代普通氧化锌时,胎面胶的焦烧时间和正硫化时间与等锌替代时相比略有缩短,仍长于普通氧化锌胎面胶,其他性能变化不大,且与普通氧化锌胎面胶基本相当。使用SA-800可实现锌减量的目的。

关键词：高分散性活性剂 SA-800 胎面胶氧化锌锌含量

Autophagy-targeting modulation to promote peripheral nerve regeneration

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Neural Regeneration Research 2025年第7期20卷 1864-1882页

作者： Yan Chen hongxia Deng Nannan zhang Department of Obstetrics and Gynecology West China Second HospitalSichuan UniversityChengduSichuan ProvinceChina Key Laboratory of Birth Defects and Women and Children’s Diseases Ministry of EducationSichuan UniversityChengduSichuan ProvinceChina Laboratory of Reproductive Endocrinology and Reproductive Regulation Sichuan UniversityChengduSichuan ProvinceChina National Center for Birth Defect Monitoring West China Second University HospitalSichuan UniversityChengduSichuan ProvinceChina

Nerve regeneration following traumatic peripheral nerve injuries and neuropathies is a complex process modulated by diverse factors and intricate molecular *** studies have focused on factors that stimulate axonal outgrowth and myelin ***,recent studies have highlighted the pivotal role of autophagy in peripheral nerve regeneration,particularly in the context of traumatic ***,autophagy-targeting modulation has emerged as a promising therapeutic approach to enhancing peripheral nerve *** current understanding suggests that activating autophagy facilitates the rapid clearance of damaged axons and myelin sheaths,thereby enhancing neuronal survival and mitigating injury-induced oxidative stress and *** actions collectively contribute to creating a favorable microenvironment for structural and functional nerve regeneration.A range of autophagyinducing drugs and interventions have demonstrated beneficial effects in alleviating peripheral neuropathy and promoting nerve regeneration in preclinical models of traumatic peripheral nerve *** review delves into the regulation of autophagy in cell types involved in peripheral nerve regeneration,summarizing the potential drugs and interventions that can be harnessed to promote this *** hope that our review will offer novel insights and perspectives on the exploitation of autophagy pathways in the treatment of peripheral nerve injuries and neuropathies.

关键词： autophagy autophagy related genes Charcot–Marie–Tooth diseases diabetic peripheral neuropathy metformin myelination peripheral nerve injury Schwann cells sciatic nerve Wallerian degeneration

Discrimination of pharmacodynamic components and volatile compounds of Poria cocos cultivated with five different materials based on GC-IMS analysis

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Food Quality and Safety 2024年第1期8卷 135-144页

作者： Yinan Wang Fei Zhou Hui Wang Jinping zhang hongxia Xu Research Institute of Subtropical Forestry Chinese Academy of ForestryHangzhouChina Chun‘an County Thousand-island Lake Forest Farm HangzhouChina

Objectives:The chemical constituents of Poria cocos grown with different substrates vary significantly;thus,identifying and comparing their biomarkers are *** and Methods:Herein,the chemical constituents of Poria cocos obtained with five different substrates were assessed using gas chromatography–ion mobility spectrometry(GC-IMS),high-performance liquid chromatography and multivariate statistical ***:The content of moisture,ash,alcohol-soluble matter,and heavy metals,except for those of the miscellaneous wood Poria cocos,conform to the specifications defined in the Chinese Pharmacopoeia(Edition 2020),and the polysaccharide contents are all greater than 57%.Conclusions:Based on GC-IMS and the established fingerprints,87 compounds were detected,70 of which were identified in each *** statistical analysis revealed seven compounds(two esters,three alcohols,and two aldehydes),which could be considered as potential marker compounds for discrimination.

关键词： Poria cocos cultivation material pharmacodynamic component gas chromatography-ion mobility spectrometry(GC-IMS) volatile compound.

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棉织物活性染料高利用率染色机理及应用

上海纺织科技 2024年第3期52卷 21-26,47页

作者：贾鲁岳许长海杜金梅张红霞苗大刚青岛大学山东青岛266071 魏桥纺织股份有限公司山东滨州256200

通过聚环氧氯丙烷胺化物阳离子改性棉织物,使用中性固色活性染料染色实现棉织物无盐高上染率染色。结果发现:在改性剂质量分数3%、NaOH质量浓度5 g/L、改性温度60℃、改性时间25 min的条件下进行改性,棉织物在pH值=7的溶液中电位为32 m... 详细信息

通过聚环氧氯丙烷胺化物阳离子改性棉织物,使用中性固色活性染料染色实现棉织物无盐高上染率染色。结果发现:在改性剂质量分数3%、NaOH质量浓度5 g/L、改性温度60℃、改性时间25 min的条件下进行改性,棉织物在pH值=7的溶液中电位为32 mV左右;N元素含量增加;最终上染率可以超过95%,同时染色棉织物色牢度较好。研究结果表明,阳离子改性棉织物可实现中性无盐高利用率活性染料染色。

关键词：棉织物染色高上染率阳离子改性中性固色活性染料染色动力学染色热力学

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原来是我的乡愁

现代艺术 2024年第7期 125-125页

作者：张红霞不详

那天,到达龙湖水香的时候,已经傍晚。虽然龙湖水香的“香”不是乡村的“乡”,但初听时还是给人一种梦回水乡的期待感。而我心目中的水乡有青山远望、翠柳依依、村落炊烟,是一幅湿滬滬的水墨画,因此对这个“水香”也抱着一些期待。

关键词：梦回乡愁水墨画柳依依水乡湖水

颅内动脉瘤介入术病人自我管理的最佳证据总结

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全科护理 2024年第4期22卷 595-600页

作者：许英曾梁楠张洪霞明霞唐容李倩茜杨昌美西南医科大学护理学院 646000 成都市第五人民医院 611130 西南医科大学附属医院 646000

目的:系统检索、评价和总结颅内动脉瘤介入术病人自我管理的相关证据,为临床制订基于证据的颅内动脉瘤介入术病人自我管理干预方案提供依据。方法:系统检索国内外相关指南网站、专业学会网站及PubMed、中国知网等数据库中关于颅内动脉... 详细信息

目的:系统检索、评价和总结颅内动脉瘤介入术病人自我管理的相关证据,为临床制订基于证据的颅内动脉瘤介入术病人自我管理干预方案提供依据。方法:系统检索国内外相关指南网站、专业学会网站及PubMed、中国知网等数据库中关于颅内动脉瘤介入术病人自我管理的相关指南、专家共识、临床决策、系统评价等,检索时限为建库至2023年1月25日。结果:共纳入13篇文献,其中指南5篇,最佳实践1篇,专家共识5篇,系统评价2篇。从颅内动脉瘤介入术病人信息管理、围术期管理、症状与疾病管理、日常生活管理、情绪管理、社会管理、随访管理7个方面总结出26条最佳证据。结论:颅内动脉瘤介入术病人自我管理的最佳证据总结具有科学性和规范性,医护人员可结合临床情境,为颅内动脉瘤介入术病人提供个性化的自我管理指导。

关键词：颅内动脉瘤血管内治疗自我管理证据总结循证护理

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农作物秸秆颗粒饲料特性分析及对奶牛产奶量的影响

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畜牧兽医杂志 2024年第4期43卷 45-47页

作者：李红梅吴静包永清毛红霞张红霞赵元芳谈宝平杨延平李江舟甘南藏族自治州畜牧工作站甘肃合作747000 舟曲县昊宇农业科技发展有限责任公司甘肃舟曲746300

本试验旨在研究农作物秸秆转化为高品质的颗粒饲料,实现资源的有效利用,将农作物秸秆加入精饲料和添加剂粉碎压制成颗粒秸秆饲料,充分发挥秸秆饲料的营养价值。加料量一般控制在的3%~6%,含水率14%~16%之间。农作物秸秆颗粒中加入5%左右... 详细信息

本试验旨在研究农作物秸秆转化为高品质的颗粒饲料,实现资源的有效利用,将农作物秸秆加入精饲料和添加剂粉碎压制成颗粒秸秆饲料,充分发挥秸秆饲料的营养价值。加料量一般控制在的3%~6%,含水率14%~16%之间。农作物秸秆颗粒中加入5%左右的油脂、鸡蛋或糖蜜。颗粒直径一般在10~30 mm之间,可根据家畜而定,提高家畜的适口性及资源的利用价值。对农作物秸秆通过科学的加工处理,提高其应用价值,为畜牧业提供可持续的饲料来源,将县域内的农作物秸秆变废为宝。

关键词：农作物秸秆颗粒饲料加工利用

Microstructure and mechanical properties of cast Mg-15Al-xNd alloy by permanent mold

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China Foundry 2013年第5期10卷 315-320页

作者： Zhou Kangkang Wang hongxia Liang Wei zhang Jinshan zhang hongxia College of Materials Science and Engineering Taiyuan University of Technology Key Laboratory of Interface Science and Engineering in Advanced Materials

To improve the comprehensive mechanical properties of Mg-15Al magnesium alloy,different amounts(from 0 to 4.0wt.%)of Nd were added to the alloy and six Mg-15Al-xNd alloys were prepared by metal mould *** effect of Nd content on microstructure of the alloys was investigated by means of OM,SEM,EDS,TEM,and *** tensile properties were tested at room temperature(RT)and high temperature(473 K).The results indicate that the primaryα-Mg dendrite is significantly refined with the addition of *** best refinement is reached at 1.0wt.%Nd content and the average dendrite arm spacing decreases from 80-100μm(without Nd addition)to^20μm.A further increase in Nd content leads to the coarsening of the primaryα-Mg *** addition of Nd improves the tensile properties of Mg-15Al both at RT and 473 *** Mg-15Al alloy containing 1.0wt.%Nd exhibits the best tensile *** with the alloy without Nd,the yield and ultimate tensile strength of the Mg-15Al-1.0Nd alloy at RT increase from 132.3 to 148.6 MPa and 152.3 to 189.6MPa,increase by 12.3%and 24.5%,respectively;and the elongation at RT increases from 0.05%to 1.24%.The yield and tensile strength of the alloy at 473 K increase from 97.9 to 115.3 MPa and 121.6 to 140.1 MPa,increase by 15.2%and 20%,*** increment of Nd content to 1.5wt.%degrades the tensile properties,which is ascribed to grain coarsening and growth of the Al-Nd phase.

关键词： Mg-15Al magnesium alloy microstructure mechanical properties