检索结果-南通市图书馆

Suppressing Self-discharge of Vanadium Diboride by Zwitterionicity of Polydopamine Coating Layer

在线全文

学校读者我要写书评

暂无评论

Suppressing Self-discharge of Vanadium Diboride by Zwitterio...

Effects of Steam Heat-Treatment on Properties of Pinus massoniana Wood and Its Bonding Performance

中国化学会第二十次全国电化学大会

作者： Fanqi Wang Meifen wu Tao Zhang Zhaoyin Wen CAS Key Laboratory of Materials for Energy Conversion Shanghai Institute of CeramicsChinese Academy of Sciences

The vanadium boride（VB2） air battery[1] is currently known as a primary battery with the highest theoretical specific capacity, 4060 mAh g-1, which originates from extraordinary 11 electron per VB2 molecule oxidation process. However, the parasitical reaction between VB2 and hydroxide ions in the alkaline electrolyte leads to obvious self-discharge,

关键词：

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

Journal of Renewable Materials 2021年第4期9卷 789-801页

作者： meifen Tian Bengang Zhang Zhigang wu Liping Yu Lifen Li Xuedong Xi College of Forestry Guizhou UniversityGuiyang550025China Yunnan Provincial Key Laboratory of Wood Adhesives and Glued Products Southwest Forestry UniversityKunming650224China ENSTIB-LERMAB University of LorraineEpinal88051France

Pinus massoniana wood was modified by steam heat-treatment at 160℃,180℃,200℃ and 220℃ respectively and effects of the changes of density,pH,surface wettability and apparent morphology of Pinus massoniana heat-treated wood on its bonding performance were studied in this paper.The results showed that Pinus massoniana wood underwent a series of physical and chemical changes during heat-treatment as the the following:(1)The degradation of hemicellulose and cellulose with low degree of polymerization,degradation and migration of the extract resulting in the decline of density and pH of heat-treated Pinus massoniana wood.(2)Brittle fracture occured on the cell wall surface,and the pit collapse,shrink and deformation,resulting in the formation of roughness and porosity on the wood surface.(3)The surface energy decreased with the improvement of temperature,the surface wettability of Pinus massoniana wood treated at 160℃–180℃ was good,while that at 200℃–220℃ showed hydrophobicity.(4)Changes of density,pH,surface roughness and porosity,and wettability resulted in a reduction in the bonding strength and reliability of heat-treated Pinus massoniana wood with MUF resin adhesive.(5)When the temperature was at 160℃–180℃,the better wettability of heat-treated Pinus massoniana wood could guarantee the better bonding performance.

关键词： Pinus massoniana wood heat-treatment bonding performance

An Eco-Friendly Wood Adhesive from Alfalfa Leaf Protein

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

Journal of Renewable Materials 2020年第11期8卷 1429-1441页

作者： Bengang Zhang Xuedong Xi Zhigang wu Hong Lei Lifen Li meifen Tian College of Forestry Guizhou UniversityGuiyang550025China Yunnan Provincial Key Laboratory of Wood Adhesives and Glued Products Southwest Forestry UniversityKunming650224China ENSTIB-LERMAB University of LorraineEpinal88051France

According to the preparation method commonly used for soy proteinαbased adhesives,alfalfa leaf protein was used as the raw material to prepare alfalfa leaf protein-based wood adhesive.Differential scanning calorimetry analyzer(DSC),X-ray diffraction(XRD)and Fourier transform infrared spectroscopy(FTαIR)were used to characterize properties of the alfalfa leaf protein-based adhesive in this paper.The results revealed the following:(1)Chemical compositions and chemical structures of the alfalfa leaf protein were basically identical with those of the soy protein,both belonging to spherical proteins with the basis and potential for protein adhesives preparation,and spatial cross-linked network structures would be easily formed.(2)Alfalfa leaf protein and soy protein adhesives had the similar curing behaviors,curing temperature of alfalfa leaf protein-based adhesive was relaαtively lower,and the heating rate had minor influence on curing temperature of alfalfa leaf protein-based adhesive.At different heating rates,change tendencies of curing reaction degrees of both the two adhesives were not totally the same.(3)Activation energy and reaction frequency factor of the alfalfa leaf protein-based adhesive were higher than those of soy protein-based adhesive,indicating that the curing reaction of the alfalfa leaf protein adhesive was more difficult than soy protein-based adhesive,thus the dry shear strength and water resistance of alfalfa protein-based adhesive were lower than those of soy protein-based adhesive.Dynamics models of curing reactions of alfalfa leaf protein-based adhesive and soy protein-based adhesive are dα=dt/1.06×10^(13)e^(-97370/RT)(1-α)^(0.938) and dα/dt=1.09×10^(11)e^(-84260/RT) 1-α)^(0.928) respectively.The results of this study will expand the selection of raw materials for protein-based wood adhesives.

关键词： Alfalfa leaf protein wood adhesive curing properties thermal performance

Electrochemical performance of NiCl_(2) with Br-free molten salt electrolyte in high power thermal batteries

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

Science China(Technological Sciences) 2021年第1期64卷 91-97页

作者： CAO Yong LI Jian YANG Peng WEI KaiYuan MA ShiPing ZHANG XiaoQiang wu meifen LIU XiaoJiang CUI YanHua WEN ZhaoYin Institute of Electronic Engineering China Academy of Engineering PhysicsMianyang 621000China College of Materials Science and Engineering Chongqing UniversityChongqing 400044China State Key Laboratory of High Performance Ceramics and Superfine Microstructure Shanghai Institute of CeramicsChinese Academy of SciencesShanghai 200050China

NiCl_(2) with high theoretical voltage and thermal decomposition temperature attracts much attention as cathode material for thermal batteries with the requirement of high power density, high energy density and long work time. Unfortunately, the practical utilization of thermal batteries with NiCl_(2) cathode is limited by their poor electrochemical performance under large current, even with the conventional Li F-Li Cl-Li Br all-lithium molten salt electrolyte which proposes ultrahigh lithium ion conductivity. In this work, an unexpected ionic exchange reaction between NiCl_(2) and Li Br in Li F-Li Cl-Li Br was found, which would be the main reason for the poor electrochemical behavior of thermal batteries with NiCl_(2) cathode and Li F-Li Cl-Li Br molten salt. On this basis, Li F-Li Cl-Li_(2)SO_(4), another all-lithium molten salt free of Li Br, was investigated as the new electrolyte for NiCl_(2) cathode. For the single cell of Li(Si)/Li F-Li Cl-Li_(2)SO_(4)/NiCl_(2), a discharge capacity of 377 mA h g^(-1)(with a cut-off voltage of 1.2 V) was achieved with large current density(500 mA cm^(-2)) applied at 520℃, which is almost twice of that of Li(Si)/Li F-Li Cl-Li Br/NiCl_(2)(190 mA h g^(-1)) at the same conditions.

关键词： thermal battery molten salt electrolyte cathode material nickel chloride

华蟾酥毒基通过调控circNFIX/miR-577通路抑制乳腺癌MDA-MB-231细胞的增殖、迁移和侵袭

在线全文

学校读者我要写书评

暂无评论

中国免疫学杂志 2023年第4期39卷 770-776页

作者：何孙香吴中伟刘梅芬九江市中医医院肿瘤科九江339000 九江学院化学化工学院九江332000

目的:研究华蟾酥毒基(CnBu)对乳腺癌细胞MDA-MB-231恶性生物学行为的影响,并探讨其机制是否与调控环状RNA核因子IX(circNFIX)和miR-577表达相关。方法:将MDA-MB-231细胞分为对照(Con)组、CnBu-低剂量(L)组、CnBu-中剂量(M)组、CnBu-高剂... 详细信息

目的:研究华蟾酥毒基(CnBu)对乳腺癌细胞MDA-MB-231恶性生物学行为的影响,并探讨其机制是否与调控环状RNA核因子IX(circNFIX)和miR-577表达相关。方法:将MDA-MB-231细胞分为对照(Con)组、CnBu-低剂量(L)组、CnBu-中剂量(M)组、CnBu-高剂量(H)组、si-NC组、si-circNFIX组、pcDNA组、pcDNA-circNFIX组、CnBu+pcDNA组、CnBu+pcDNAcircNFIX组。MTT、Transwell实验分析细胞增殖、迁移和侵袭能力,Westernblot分析Ki-67、基质金属蛋白酶2(MMP-2)和MMP-9蛋白表达。RT-qPCR分析circNFIX、miR-577表达量。双荧光素酶报告实验和RT-qPCR验证circNFIX和miR-577的靶向调控关系。结果:CnBu以剂量依赖方式下调Ki-67、MMP-2、MMP-9蛋白和circNFIX表达(P<0.05),上调miR-577表达(P<0.05),减弱MDA-MB-231细胞的增殖、迁移和侵袭能力(P<0.05)。miR-577与circNFIX序列直接结合,干扰或过表达circNFIX可显著提高或降低miR-577表达水平(P<0.05)。干扰circNFIX表达显著下调Ki-67、MMP-2、MMP-9蛋白表达(P<0.05),减弱MDA-MB-231细胞的增殖、迁移和侵袭能力(P<0.05)。过表达circNFIX显著减弱CnBu对MDA-MB-231细胞增殖、迁移、侵袭及相关蛋白表达的影响(P<0.05)。结论:CnBu可抑制乳腺癌MDA-MB-231细胞的增殖、迁移和侵袭,可能通过下调circNFIX/miR-577通路实现。

关键词：华蟾酥毒基乳腺癌细胞增殖迁移侵袭 circNFIX miR-577

病原微生物在儿童川崎病中的免疫作用机制研究进展

在线全文

学校读者我要写书评

暂无评论

医学综述 2024年第9期30卷 1031-1036页

作者：伍鑫茹王美芬昆明医科大学儿科学昆明650034 昆明市儿童医院感染一科昆明650034

川崎病病因复杂,可能与感染、免疫及遗传易感性相关,病原微生物感染是川崎病发病的触发因素之一。由于超抗原和细胞因子的产生,病原微生物感染可引发机体免疫功能紊乱,并释放炎症因子,导致川崎病冠状动脉病变程度及风险增加。严重急性... 详细信息

川崎病病因复杂,可能与感染、免疫及遗传易感性相关,病原微生物感染是川崎病发病的触发因素之一。由于超抗原和细胞因子的产生,病原微生物感染可引发机体免疫功能紊乱,并释放炎症因子,导致川崎病冠状动脉病变程度及风险增加。严重急性呼吸系统综合征冠状病毒2型、肠道病毒、细菌、肺炎支原体等均可诱发机体产生与川崎病临床特征类似的急性发热性疾病,导致临床鉴别困难。目前关于诱发川崎病的病原微生物尚未完全阐明,川崎病的诊断和治疗仍存在挑战。未来深入研究病原微生物在儿童川崎病中的免疫作用机制,可以为疾病的治疗提供新思路。

关键词：川崎病病原微生物病毒细菌肺炎支原体

积极心理学视角下的高校朋辈心理辅导实施现状评析

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

科教导刊 2017年第3X期 161-162页

作者：吴梅芬遵义医学院贵州遵义563006

人本主义理论是朋辈心理辅导的主要依托理论,朋辈心理辅导自引入以来在我国形成了以心理委员制度为主体的朋辈心理辅导制度,在大学生危机预防与干预中起到了良好作用。然而,随着积极心理学等理论深入化,当前我国高校的朋辈心理辅导也正... 详细信息

人本主义理论是朋辈心理辅导的主要依托理论,朋辈心理辅导自引入以来在我国形成了以心理委员制度为主体的朋辈心理辅导制度,在大学生危机预防与干预中起到了良好作用。然而,随着积极心理学等理论深入化,当前我国高校的朋辈心理辅导也正在扩大职能,从关心帮助有心理困扰的学生到致力于促进个体积极心态和良好品质的发展,达到主客体共同进步。

关键词：积极心理学朋辈心理辅导大学生心理健康教育

同方期刊数据库

中国煤炭产业社会许可研究——基于新闻文本的实证分析

在线全文

学校读者我要写书评

暂无评论

中国矿业大学学报（社会科学版） 2022年第1期24卷 95-106页

作者：龙如银张钦吴梅芬中国矿业大学经济管理学院

煤炭产业的健康发展离不开整个社会的支持和认可,即社会许可。以主题为煤炭的新闻报道作为数据源,利用深度学习的长短期记忆模型(LSTM)对报道文本进行情感分类,再通过文本分析方法分别从积极和消极的报道中提取正向和负向影响煤炭产业... 详细信息

煤炭产业的健康发展离不开整个社会的支持和认可,即社会许可。以主题为煤炭的新闻报道作为数据源,利用深度学习的长短期记忆模型(LSTM)对报道文本进行情感分类,再通过文本分析方法分别从积极和消极的报道中提取正向和负向影响煤炭产业社会许可的因素。研究结果表明:正向影响煤炭产业社会许可的因素有产能优化、清洁发展、科技创新和经济贡献;负向影响因素有煤电矛盾、产能过剩、供求不平衡和生产安全。根据各影响因素的重要性趋势分析,近三年来对煤炭产业社会许可影响最大的因素是产能、清洁发展和供求不平衡。其中,清洁发展对于促进社会许可的重要性正逐年上升。此外,研究还发现生产安全问题对社会许可的负面影响会随着安全事故的增多而扩大。

关键词：煤炭产业社会许可新闻深度学习文本分析

一种基于Adam算法优化的神经网络变压器顶层油温预测

在线全文

学校读者我要写书评

暂无评论

电工技术 2023年第19期 45-48,51页

作者：林梅芬吴学先福建水利电力职业技术学院电力工程学院福建永安366000 国网永安市供电公司福建永安366000

基于国内外现有变压器老化影响因素、绕组热点温度的预测方法及变压器绝缘状态评估的研究基础,以变压器顶层油温为研究对象,利用灰色关联分析法分析变压器监测量与顶层油温的相关性,采用Adam算法优化的人工神经网络对热点温度进行预测... 详细信息

基于国内外现有变压器老化影响因素、绕组热点温度的预测方法及变压器绝缘状态评估的研究基础,以变压器顶层油温为研究对象,利用灰色关联分析法分析变压器监测量与顶层油温的相关性,采用Adam算法优化的人工神经网络对热点温度进行预测。该预测方法速度快、精度高,能在变压器负载状态和散热设备动态变化明显的工作情况下实现顶层油温的高精度预测。

关键词：电力变压器顶层油温灰度相关性分析 Adam算法 BP神经网络