检索结果-南通市图书馆

维普期刊数据库博看期刊

在线全文

学校读者我要写书评

暂无评论

MBS树脂改性PVC的研究

石油化工 2002年第8期31卷 626-628页

作者：孟宪谭朱卫东韩晶杰齐鲁石油化工公司研究院山东淄博255400

研究了不同类型及用量的MBS树脂对PVC抗冲击性、光学性能、拉伸性能及加工塑化性能的改性效果以及加工条件等因素的影响。结果表明 :在低用量条件下 ,随MBS树脂含量增加 ,MBS/PVC抗冲击性能有所提高 ,光学性能略有下降。此外 ,MBS/PVC... 详细信息

研究了不同类型及用量的MBS树脂对PVC抗冲击性、光学性能、拉伸性能及加工塑化性能的改性效果以及加工条件等因素的影响。结果表明 :在低用量条件下 ,随MBS树脂含量增加 ,MBS/PVC抗冲击性能有所提高 ,光学性能略有下降。此外 ,MBS/PVC制品的拉伸性能和加工性能受MBS树脂类型及用量影响不大。

关键词： MBS树脂改性 PVC 研究聚氯乙烯抗冲击性透明性拉伸性能加工性能

Development of a new high-shear and low-pressure grinding wheel and its grinding characteristics for Inconel718 alloy

在线全文

学校读者我要写书评

暂无评论

Chinese Journal of Aeronautics 2022年第12期35卷 278-286页

作者： Bing LIU Yebing TIAN Jinguo han Linguang LI Zhiqiang GU Xintao HU School of Mechanical Engineering Shandong University of TechnologyZibo 255049China Institute for Advanced Manufacturing Shandong University of TechnologyZibo 255049China

Nickel-based alloy has been widely used due to its outstanding mechanical ***, Nickel-based alloy is a typical difficult-to-machine material, which is a great constrain for its application in the manufacturing field. To improve the surface quality of the ground workpiece, a new high-shear and low-pressure grinding wheel, with high ratio of tangential grinding force to normal grinding force, was fabricated for the grinding of selective laser melting(SLM) manufactured Inconel718 alloy. The principle of high-shear and low-pressure grinding process was introduced in detail, which was quite different from the conventional grinding process. The fabrication process of the new grinding wheel was illustrated. A serial of experiments with different processing parameters were carried out to investigate the grinding performance of the developed grinding wheel via analyzing surface roughness and surface morphology of the ground *** optimal processing parameters of high-shear and low-pressure grinding were obtained. The surface roughness of ground workpiece was reduced to 0.232 μm from the initial value of 0.490 μm under the optimal grinding conditions. It was found that the initial scratches on the ground workpiece were almost completely removed after the observations with the metalloscopy and the fieldemission scanning electron microscopy(FE-SEM). The capability of the newly developed highshear and low-pressure grinding wheel was validated.

关键词： Grinding Grinding wheel High-shear and low-pressure grinding Inconel718 alloy Selective laser melting(SLM)

Research on GGT-responsive drug carrier with active transport effect

在线全文

学校读者我要写书评

暂无评论

Nano Research 2023年第5期16卷 7075-7084页

作者： han Yan He Ma Bin He Bing Yu Youqing Shen Hailin Cong Institute of Biomedical Materials and Engineering College of Materials Science and EngineeringCollege of Chemistry and Chemical EngineeringQingdao UniversityQingdao 266071China State Key Laboratory of Bio-Fibers and Eco-Textiles Qingdao UniversityQingdao 266071China Key Laboratory of Biomass Chemical Engineering of Ministry of Education Center for BionanoengineeringDepartment of Chemical and Biological EngineeringZhejiang UniversityHangzhou 310027China School of Materials Science and Engineering Shandong University of TechnologyZibo 255000China

Although a great quantity research has been done on cancer nano-drug carriers,how to deliver more cancer nano-drugs to tumor sites accurately and then endocytosis by cells is still a key problem in the process of cancer *** the concentration ofγ-glutamyl transpeptidase(GGT)in the microenvironment will be greatly increased when the liver,kidney,other organs become cancerous,we have designed a polymer nanomicelle as drug carrier that can respond to the GGT in the tumor *** the drug delivery system participates in blood circulation through the vascular wall cells to the tumor tissue,the overexpressed GGT on the surface of the cancer cells will recognize and cut theγ-glutamyl group on the carrier,the primary amines will be released to make the system with weak positive charge,which not only improves the carrier’s active transport ability for nanodrugs,but also improves the cell’s endocytosis ability for nano-drugs,so as to realize the release of nano-drugs in cancer ***’s more,the positive charge on the surface of the carrier also improves the permeability of the carrier in the tumor tissue,so that the cancer cells in the hypoxic area can also endocytosis drugs.

关键词： micelles enzyme response active transport endocytosis

运行复合绝缘子伞裙的力学特性及分子动力学模拟研究

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

绝缘材料 2024年第8期57卷 138-147页

作者：韩飞燕胡玉耀蒋兴良刘辉李天阳山东理工大学山东省智能电网及装备工程实验室山东淄博255020 重庆大学输配电装备及系统安全与新技术国家重点实验室重庆400044 国网山东省电力公司电力科学研究院山东济南250003

为更精细化评估伞裙的微观结构和材料组成等因素对绝缘子宏观性能的影响,本文结合分子动力学模拟方法对不同运行年限的交流复合绝缘子进行力学性能、热失重、傅里叶红外光谱等测试。结果表明:随着运行年限的增加,绝缘子从低压端到高压... 详细信息

为更精细化评估伞裙的微观结构和材料组成等因素对绝缘子宏观性能的影响,本文结合分子动力学模拟方法对不同运行年限的交流复合绝缘子进行力学性能、热失重、傅里叶红外光谱等测试。结果表明:随着运行年限的增加,绝缘子从低压端到高压端的伞裙抗撕裂强度、拉伸强度、断裂伸长率整体呈下降的趋势;伞裙外层有机硅和SiO2的含量大幅下降,可造成宏观力学性能下降;在电-热环境下,伞裙的体积模量、杨氏模量和泊松比随温度的升高整体呈下降的趋势,随电场强度的升高整体呈波动性;绝缘子高压端的电场畸变最严重,力学性能最差。本文建立的复合绝缘子伞裙老化的多尺度模型,可为评估绝缘子老化状态提供参考。

关键词：力学性能热失重硅橡胶电场强度 FTIR

维普期刊数据库博看期刊

基于优化的Maxent模型预测桔梗在中国的潜在适生区

在线全文

学校读者我要写书评

暂无评论

药学学报 2024年第9期59卷 2625-2633页

作者：张玉洁余函纹郑昭焕蒋超刘娟查良平池秀莲桂双英安徽中医药大学药学院安徽合肥230012 安徽中医药大学新安医学与中医药现代化研究所安徽合肥230012 中国中医科学院中药资源中心道地药材品质保障与资源持续利用全国重点实验室北京100700

桔梗Platycodongrandiflorum(Jacq.)***.作为最常用的大宗药材,在药用、食用和化妆品领域中都有着重要价值,市场需求量逐年增多,具有良好的开发前景。本研究以中国境内桔梗为研究对象,基于403条分布点和8个环境因子变量,运用参数优化后... 详细信息

桔梗Platycodongrandiflorum(Jacq.)***.作为最常用的大宗药材,在药用、食用和化妆品领域中都有着重要价值,市场需求量逐年增多,具有良好的开发前景。本研究以中国境内桔梗为研究对象,基于403条分布点和8个环境因子变量,运用参数优化后的Maxent模型探究未来气候条件下桔梗的适生分布情况。研究表明Maxent参数在特征组合(featurecombination,FC)为LQPH(L:线性特征;Q:二次型特征;P:片段化特征;H:乘积型特征),调控倍频(regularizationmultiplier,RM)为2.1时,模型模拟效果最佳,受试者曲线下面积(areaundercurve,AUC)为0.901;模型预测显示在当前气候条件下,桔梗广泛分布于中国的28个省份,适生区面积达2337419.98km^(2);在未来气候变化影响下,桔梗的适生区面积呈现降低趋势,分布中心整体呈现向北和向东偏移的趋势;当前三大主产区内桔梗的分布面积受气候变化影响的变化趋势不同,总体表现为在内蒙古赤峰的未来适生分布面积增加,而在共享社会经济路径5-8.5(shared socioeconomicpathways,SSP)排放情景下山东淄博和安徽亳州、太和县的未来适生分布面积减少甚至消失。建议维持和保护好适宜桔梗生长的保留区的生态环境和种质资源,增加在桔梗扩增区中的栽培研究,为后续拓展桔梗种植打下基础,由此促进桔梗资源的保护和可持续发展。

关键词：桔梗 Maxent模型参数优化气候变化适生区变化

在线全文

学校读者我要写书评

暂无评论

“琅琊之稻”考论

农业考古 2022年第4期 74-78页

作者：杨子博曲阜师范大学孔子文化研究院

“琅琊之稻”是古琅琊地区的著名农业物产,具有4000多年的种植史,主要分布于今山东潍坊、青岛、日照和临沂等地,即潍水(潍河)、胶莱河和沂沭河流域。古琅琊地区独特的气候条件和地理环境造就了琅琊稻的优良品质。其代表性品种主要有汉... 详细信息

“琅琊之稻”是古琅琊地区的著名农业物产,具有4000多年的种植史,主要分布于今山东潍坊、青岛、日照和临沂等地,即潍水(潍河)、胶莱河和沂沭河流域。古琅琊地区独特的气候条件和地理环境造就了琅琊稻的优良品质。其代表性品种主要有汉代“稻城稻”、唐代“芙蓉湖香粳”和“塘崖贡米”以及明清诸城“黄小红芒稻”等。其优良品质主要表现在它的高产、耐旱、味香、价优等方面。琅琊稻在古代稻作史和中外稻作交流史中占据重要地位。

关键词：琅琊琅琊稻稻作史

Impact of inhaled corticosteroid use on elderly chronic pulmonary disease patients with community acquired pneumonia

在线全文

学校读者我要写书评

暂无评论

Chinese Medical Journal 2024年第2期137卷 241-243页

作者： Xiudi han Hong Wang Liang Chen Yimin Wang Hui Li Fei Zhou Xiqian Xing Chunxiao Zhang Lijun Suo Jinxiang Wang Guohua Yu Guangqiang Wang Xuexin Yao Hongxia Yu Lei Wang Meng Liu Chunxue Xue Bo Liu Xiaoli Zhu Yanli Li Ying Xiao Xiaojing Cui Lijuan Li Xuedong Liu Bin Cao Department of Pulmonary and Critical Care Medicine Qingdao Municipal HospitalQingdaoShandong 266011China Department of Nosocomial Infection Qingdao Municipal HospitalQingdaoShandong 266011China Department of Infectious Diseases Nanjing Lishui People’s HospitalNanjingJiangsu 211213China Department of Pulmonary and Critical Care Medicine National Clinical Research Center of Respiratory DiseasesCenter for Respiratory DiseasesChina-Japan Friendship HospitalBeijing 100020China Department of Respiratory Medicine Yan’an Hospital Affiliated to Kunming Medical UniversityKunmingYunnan 652199China Department of Respiratory Medicine Beijing Huimin HospitalBeijing 100054China Department of Pulmonary and Critical Care Medicine Zibo Municipal HospitalZiboShandong 255000China Department of Respiratory Medicine Beijing Luhe HospitalCapital Medical UniversityBeijing 101149China Department of Pulmonary and Critical Care Medicine Weifang No.2 People’s HospitalWeifangShandong 261599China Department of Respiratory Medicine Shandong University Affiliated Qilu Hospital(Qingdao)QingdaoShandong 266035China Department of Respiratory Medicine the 2nd Hospital of Beijing CorpsChinese Armed Police ForcesBeijing 100044China Department of Infectious Disease Qingdao University Medical College Affiliated Yantai Yuhuangding HospitalYantaiShandong 100191China Department of Respiratory Medicine Rizhao Chinese Medical Hospital Affiliated to Shandong Chinese Medical UniversityRizhaoShandong 276800China Department of Respiratory Medicine Beijing Hospital of Traditional Chinese Medicine Affiliated to Capital Medical UniversityBeijing 100010China Department of Occupational Medicine and Toxicology Beijing Chao-Yang HospitalCapital Medical UniversityBeijing 100020China

To the Editor:With an aging global population,the incidences of community-acquired pneumonia(CAP)and chronic obstructive pulmonary disease(COPD)have signicantly increased.[1]Previous studies have conrmed that COPD and asthma are independently associated with the prevalence of *** use of inhaled corticosteroid(ICS),the cornerstone of treatment for asthma,COPD with frequent acute exacerbations,and asthma-COPD overlap(ACO)may induce changes in the local lung microbiome and abnormal lung immunity,ultimately,causing a signicantly increased risk of ***,in cases of pneumonia,the effect of the use of ICS on CAP mortality remains *** data from one study favored the prior use of ICS,which was associated with a signicantly lower short-term mortality rate,[2]other studies have identied no impact on *** date,data on the impact of the use of ICS on mortality,prehospitalization or during hospitalization,are scarce,particularly in the older ***,this multicenter,retrospective study explored the association between the use of ICS during hospitalization and short-term mortality in older patients with CAP and those with chronic pulmonary disease(CPD).

关键词： pneumonia patients immunity

医院护理信息化技术在手术室管理中的应用和研究进展

在线全文

学校读者我要写书评

暂无评论

中国卫生产业 2024年第4期21卷 149-152页

作者：张学张金红韩聪聪淄博市中心医院麻醉手术科山东淄博255020

本文介绍了医院护理信息化技术在手术室管理中的应用和研究进展,以应用的概念、应用的理论依据、应用现状、存在的不足进行分析,并提出了加强统计化信息建设、提高护理人员信息素养、加大资金投入优化资源共享机制的建设。希望能够对相... 详细信息

本文介绍了医院护理信息化技术在手术室管理中的应用和研究进展,以应用的概念、应用的理论依据、应用现状、存在的不足进行分析,并提出了加强统计化信息建设、提高护理人员信息素养、加大资金投入优化资源共享机制的建设。希望能够对相关行业内的从业者予以一定的借鉴和帮助。

关键词：医院护理信息化技术手术室管理研究进展

磷掺杂碳量子点的制备及活化过一硫酸盐降解亚甲基蓝

同方期刊数据库博看期刊评论

在线全文

学校读者我要写书评

暂无评论

无机盐工业 2024年第1期56卷 126-133页

作者：张利洁李德刚韩文渊徐会君张维民郁宸山东理工大学山东淄博255000

报道了一种磷掺杂碳量子点(P-CQDs)的方法,用红外光谱(FT-IR)、X射线光电子能谱仪(XPS)、透射电子显微镜(TEM)等对P-CQDs进行了详细表征,结果证实磷成功接入了CQDs。引入磷可以减少CQDs的禁带宽度,从而提高对光的吸收和促进光生电子转... 详细信息

报道了一种磷掺杂碳量子点(P-CQDs)的方法,用红外光谱(FT-IR)、X射线光电子能谱仪(XPS)、透射电子显微镜(TEM)等对P-CQDs进行了详细表征,结果证实磷成功接入了CQDs。引入磷可以减少CQDs的禁带宽度,从而提高对光的吸收和促进光生电子转移。在可见光照射下,P-CQDs的用量为0.5 g/L、过一硫酸盐(PMS)的浓度为0.4 mmol/L时,10 min内亚甲基蓝(MB)的降解率为99%。考察了P-CQDs用量、PMS浓度和MB浓度等因素对体系降解MB效率的影响。同时,用自由基淬灭实验考察了P-CQDs光催化活化PMS降解MB的机理,结果表明超氧自由基(O_(2)^(·-))是主要的活性物质。

关键词：碳量子点过一硫酸盐催化降解亚甲基蓝