检索结果-南通市图书馆

Highly biocompatible BSA-MnO_2 nanoparticles as an efficient near-infrared photothermal agent for cancer therapy

在线全文

学校读者我要写书评

暂无评论

Chinese Chemical Letters 2018年第11期29卷 1685-1688页

作者： Yuzhen Wang Yujun Song Guixian Zhu Dechen Zhang xuewu liu Key Laboratory of Flexible Electronics (KLOFE) & Institute of Advanced Materials (IAM) Jiangsu National Synergistic Innovation Center for Advanced Materials (SICAM)Nanjing Tech University (NanjingTech) Department of Biomedical Engineering College of Engineering and Applied SciencesNanjing University Department of Nanomedicine Houston Methodist Research Institute

More recently, the biomedical applications of MnO2 in bioanalysis, cell imaging, and drug delivery as a result of their appealing physicochemical properties, have been reported and expanded rapidly. However, research on a near infrared （NIR） photothermal response of MnO2 was ignored. In this work, we reported a facile, one-pot method to synthesis of bovine serum albumin （BSA）-reduced and stabilized MnO2 nanoparticles （BSA-MnO2 NPs） with good aqueous dispersibility and high biocompatibility. And we also showed for the first time that BSA-MnO2 NPs displayed superior NIR photothermal efficiency and photostability which demonstrated as a novel class of photothermal antitumor agent.

关键词： Bovine serum albumin Manganese dioxide Photothermal NIR Cancer therapy

Study of the Liquid Phase Volume Expansion for CO_2/Organic Solvent Systems

在线全文

学校读者我要写书评

暂无评论

Chinese Journal of Chemical Engineering 2005年第4期13卷 504-509页

作者： LI Zhiyi（李志义） XIA Yuanjing（夏远景） liu xuewu（刘学武） DENG Xiaoliang（邓小亮） Hu Dapeng（胡大鹏） R＆D Institute of Fluid and Powder Engineering Dalian University of Technology Dalian 116012 China

The supercritical antisolvent （SAS） process has been developed in recent years for the tormation of nanoand micro-particles. It is necessary to study the liquid phase volume expansion （LPVE） and find the relationships between the operating conditions and the LPVE in order to develop a practical method for determining the operation conditions and selecting an organic solvent for SAS process. The PR equation of state with vdW-1 mixing rule is used to calculate the LPVE for CO2/toluene, CO2/acetone and CO2/ethyl acetate systems, and the results show that the LPVE for each CO2/organic solvent system decreases as the temperature increases. The relationship between the LPVE and the solubility of CO2 in the liquid phase for CO2/organic solvent systems is investigated, and the results show that the LPVE is determined directly by the solubility of CO2 in the liquid phase, xCO2, and can be related to xCO2 independently. No matter what system of CO2/organic solvent is and how different the temperature is, the LPVEs have little difference as long as the solubility of CO2 in the liquid phase, xCO2, keeps constant. The lower temperature is always favorable to the SAS process. The higher the solubility of CO2 in an organic solvent under certain operation condition, the more suitable it is to the SAS process.

关键词： supercritical antisolvent process liquid phase volume expansion carbon dioxide organic solvent

Structure Analysis With 3D Hexahedral Meshes Generated by a Label-Driven Subdivision

在线全文

学校读者我要写书评

暂无评论

Structure Analysis With 3D Hexahedral Meshes Generated by a ...

Structure Analysis With 2D Quadrilateral Meshes Generated by a Label-Driven Subdivision

2020中国汽车工程学会年会暨展览会

作者： liu Bo liu xuewu Ling Xiaoming Zhang Xingui Wang Zelun liu Wei GAC Automotive Research ＆ Development Center

For structure analysis with the finite element method（FEM）,the hexahedral element is preferable to the tetrahedral one from the viewpoint of ***,we had introduced a label-driven subdivision method for a two-dimensional mesh and showed that the meshes generated by our method were useful for structural *** this study,we extend our two-dimensional algorithm to three-dimensions and verify that the meshes generated by the proposed mesh-subdivision algorithm are useful for structural analyses.

关键词： structure analysis hexahedral element label-driven subdivision

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

Structure Analysis With 2D Quadrilateral Meshes Generated by...

2020中国汽车工程学会年会暨展览会

作者： liu Bo liu xuewu Ling Xiaoming Zhang Xingui Wang Zelun liu Wei GAC Automotive Research ＆ Development Center

For a structural analysis using the finite element method,a hexahedral element is preferable to a tetrahedral element from the viewpoint of ***,it is very difficult to subdivide a mesh consisting of hexahedral elements if the shape of the mesh is ***,in this paper,as a preliminary research,we use a label-driven subdivision method for a two-dimensional mesh,and show that meshes subdivided nonuniformly can guarantee as much accuracy as meshes with uniform subdivision.

关键词： structure analysis hexahedral element label-driven subdivision

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

金属氢化物储氢容器吸/放氢过程模拟研究

太阳能学报 2023年第12期44卷 492-498页

作者：袁田刘学武广州市工贸技师学院广州510425 大连理工大学化工学院大连116024

基于储氢合金LaNi5吸放氢性能,建立金属氢化物的储氢数值模型,并利用COMSOL软件进行模型的模拟研究,重点分析直管、翅片与螺旋管结构对容器吸氢和放氢性能的影响。结果表明:内壁加翅片、带有螺旋管换热的两种结构能有效提高储氢容器吸... 详细信息

基于储氢合金LaNi5吸放氢性能,建立金属氢化物的储氢数值模型,并利用COMSOL软件进行模型的模拟研究,重点分析直管、翅片与螺旋管结构对容器吸氢和放氢性能的影响。结果表明:内壁加翅片、带有螺旋管换热的两种结构能有效提高储氢容器吸氢速率,大幅缩短吸/放氢过程时间;温度云图显示,容器内壁加翅片的结构,热量是从壁面向容器中心进行传导;对于容器内部增加螺旋管换热结构,传热是从螺旋管向四周进行,且传热效率更高。与初始模型相比,带有螺旋管换热器结构其吸/放氢质量达到最大质量90%所需时间分别减少31.58%和31.12%。

关键词：储氢合金换热翅片传热性能储氢容器螺旋管

超临界CO_2诱导相转化法制备聚苯乙烯膜及膜体系的相图计算

在线全文

学校读者我要写书评

暂无评论

高等学校化学学报 2016年第8期37卷 1573-1579页

作者：刘学武陈淑花詹世平大连理工大学化工机械与安全学院大连116023 大连大学环境与化学工程学院大连116622

以甲苯为溶剂,利用超临界CO2诱导相转化法制备了多孔非对称聚苯乙烯膜.通过扫描电镜对膜结构进行了表征,探讨了不同温度、压力和铸膜液中聚苯乙烯浓度对膜形态、孔径分布及膜孔隙率的影响;同时,基于Tompa扩展的Flory-Huggins聚合物溶液... 详细信息

以甲苯为溶剂,利用超临界CO2诱导相转化法制备了多孔非对称聚苯乙烯膜.通过扫描电镜对膜结构进行了表征,探讨了不同温度、压力和铸膜液中聚苯乙烯浓度对膜形态、孔径分布及膜孔隙率的影响;同时,基于Tompa扩展的Flory-Huggins聚合物溶液理论计算了聚苯乙烯/超临界CO2/甲苯铸膜体系的三元相图.研究表明,在温度为35~65℃、压力为8~16 MPa及聚合物质量分数为15%~35%条件下,制备的聚苯乙烯膜截面呈胞腔状孔结构,孔隙率为53.54%~84.67%,且孔隙率随温度、压力和聚苯乙烯浓度均呈现出先增大后减小的趋势.相图计算结果表明,温度对体系双节线位置的改变影响较小,而压力对其影响相对较大.

关键词：超临界CO2相转化聚苯乙烯微孔聚合物孔隙率三元相图

癫痫患者新冠疫苗接种安全性及对癫痫发作影响的研究进展

在线全文

学校读者我要写书评

暂无评论

中华神经科杂志 2023年第10期56卷 1208-1212页

作者：范聪刘学伍山东大学齐鲁医院神经内科济南250012 山东第一医科大学附属省立医院神经内科、山东癫痫病学研究所济南250012

2019年新型冠状病毒感染暴发,并迅速在全球蔓延。为了预防新型冠状病毒感染的发生及减少危重症患者,新冠疫苗接种成为重要的手段。癫痫患者十分关心接种新冠疫苗的安全性及疫苗可能对癫痫发作的影响。本综述总结了目前新冠疫苗接种对癫... 详细信息

2019年新型冠状病毒感染暴发,并迅速在全球蔓延。为了预防新型冠状病毒感染的发生及减少危重症患者,新冠疫苗接种成为重要的手段。癫痫患者十分关心接种新冠疫苗的安全性及疫苗可能对癫痫发作的影响。本综述总结了目前新冠疫苗接种对癫痫患者影响的一些证据,从接种新冠疫苗的有效性、安全性以及癫痫患者接种后对癫痫发作的影响等方面进行综述,以提高临床医生和患者的认识,给癫痫患者接种新冠疫苗带来更大的信心,预防新型冠状病毒感染的发生。

关键词：临床医生疫苗接种危重症患者癫痫患者冠状病毒感染癫痫发作感染暴发新型冠状病毒

Optimization of Fixed-Bed Design for Natural Gas Mercury Removal by Sulfur Doped into Porous Activated Carbon

在线全文

学校读者我要写书评

暂无评论

Journal of Materials Science and Chemical Engineering 2019年第2期7卷 13-25页

作者： Delphine Mukamurara xuewu liu Shuhua Chen Shangshang Ren Jean Claude Munyemana Jiupeng Zou School of Chemical Machinery and Safety Dalian University of Technology Dalian China College of Environmental and Chemical Engineering Dalian University Dalian China Lanzhou Institute of Chemical Physics Chinese Academy of Sciences Lanzhou China University of Chinese Academy of Sciences Beijing China

The present work reports the synthesis and application of sulfur doped into porous activated carbon for removing elemental mercury from natural gas using a bench-scale fixed-bed reactor. A series of experiments were carried out to investigate the optimization of Hg0 capture. Furthermore, our experimental results about optimum conditions to remove Hg0 were 1:10 of sulfur to activated carbon impregnation ratio, 350°C of impregnation temperature, and 3 hours of impregnation time. This research showed that the prepared adsorbents were capable to remove remarkable amount of Hg0 (23.615 mg/g) at high adsorption efficiency. This study may serve as reference on natural gas power plants for the removal of Hg0 using the same conditions.

关键词： Porous activated Carbon Mercury Adsorption Mechanism Natural Gas Elemental Sulfur Impregnation

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

SAPO-34/SiO_2催化甲醇制烯烃

石油化工 2007年第6期36卷 547-552页

作者：刘学武柯丽张明森中国石油化工股份有限公司北京化工研究院北京100013

采用水热法合成了SAPO-34分子筛，并用X射线粉末衍射仪和扫描电子显微镜对SAPO-34分子筛的结构进行了表征，同时探讨了黏合剂种类、甲醇分压、催化剂粒径和硅源等对SAPO-34分子筛催化甲醇制烯烃（MTO）反应性能的影响。实验结果表明，在... 详细信息

采用水热法合成了SAPO-34分子筛，并用X射线粉末衍射仪和扫描电子显微镜对SAPO-34分子筛的结构进行了表征，同时探讨了黏合剂种类、甲醇分压、催化剂粒径和硅源等对SAPO-34分子筛催化甲醇制烯烃（MTO）反应性能的影响。实验结果表明，在MTO反应中，三烯（乙烯、丙烯和丁烯）选择性在反应初期存在明显的诱导期；以SiO2为黏合剂合成的SAPO-34／SiO2催化剂不但可缩短MTO反应的诱导期，三烯选择性也较未添加黏合剂或以Al2O3为黏合剂时高1～2个百分点；且当催化剂活性明显下降时，三烯选择性下降的幅度较小。催化剂粒径、甲醇分压及硅源对催化剂的诱导期也有明显的作用。在甲醇分压低于19kPa、催化剂粒径0．25～0．38mm、SiO2为黏合剂、硅酸四乙酯为硅源时，SAPO-34／SiO2催化剂的MTO性能明显提高。

关键词：甲醇 SAPO-34分子筛低碳烯烃二氧化硅催化剂