检索结果-南通市图书馆

A highly dispersed Pt/copper modified-MnO_(2)catalyst for the complete oxidation of volatile organic compounds:The effect of oxygen species on the catalytic mechanism

在线全文

学校读者我要写书评

暂无评论

Green Energy & Environment 2023年第2期8卷 538-547页

作者： xunxun li Yaru Wang Dongyun Chen Najun li Qingfeng Xu Hua li Jinghui He Jianmei Lu College of Chemistry Chemical Engineering and Materials ScienceCollaborative Innovation Center of Suzhou Nano Science and TechnologySoochow UniversitySuzhouJiangsu215123China

Manganese oxide(MnO_(2))exhibits excellent activity for volatile organic compound ***,it is currently unknown whether lattice oxygen or adsorbed oxygen is more conducive to the progress of the catalytic *** this study,novel hollow highly dispersed Pt/Copper modified-MnO_(2)catalysts were ***^(2+)was stabilized into theδ-MnO_(2)cladding substituting original K+,which produced lattice defects and enhance the content of adsorbed *** 2.03 wt%Pt Cu_(0.050)-MnO_(2)catalyst exhibited the highest catalytic activity and excellent stability for toluene and benzene oxidation,with T_(100)=160℃under high space velocity(36,000 mL g^(-1)h^(-1)).The excellent performance of catalytic oxidation of VOCs is attributed to the abundant adsorbed oxygen content,excellent low-temperature reducibility and the synergistic catalytic effect between the Pt nanoparticles and Cu_(0.050)-MnO_(2).This study provides a comprehensive understanding of the Langmuir-Hinshelwood(L-H)mechanism occurring on the catalysts.

关键词： Oxygen species Toluene Benzene d-MnO_(2) Hollow

2D/2D hierarchical Co_(3)O_(4)/ZnIn_(2)S_(4)heterojunction with robust builtin electric field for efficient photocatalytic hydrogen evolution

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 6134-6141页

作者： Guping Zhang xunxun li Mengmeng Wang Xueqing li Yaru Wang Shuting Huang Dongyun Chen Najun li Qingfeng Xu Hua li Jianmei Lu College of Chemistry Chemical Engineering and Materials ScienceSoochow UniversitySuzhou 215123China

Because of its importance in enhancing charge separation and transfer,built-in electric field engineering has been acknowledged as an effective technique for improving photocatalytic ***,a stable p–n heterojunction of 2D/2D(2D:twodimensional)Co_(3)O_(4)/ZnIn_(2)S_(4)with a strong built-in electric field is precisely *** Co_(3)O_(4)/ZnIn_(2)S_(4)heterojunction exhibits a higher visible-light photocatalytic hydrogen(H2)evolution rate than the individual components,which is primarily attributed to the synergy effect of improved light absorption,abundant active sites,short charge transport distance,high separation efficiency of photogenerated ***,the photoelectrochemical studies and density functional theory(DFT)calculation results demonstrate that the enhanced interfacial charge separation and migration induced by the generated built-in electric field are the critical reasons for the boosted photocatalytic *** research might pave the way for the rational design and manufacturing of 2D/2D heterojunction photocatalysts with extremely efficient photocatalytic performance for solar energy conversion.

关键词： 2D/2D heterojunction photocatalysis built-in electric field interfacial charge transfer H_(2)evolution

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

灰铸铁表面微凹坑造型的纳秒激光制备

应用激光 2015年第6期35卷 689-692页

作者：冯旭李洵洵王璐安琪吕柳江苏大学理学院江苏镇江212013 江苏大学机械工程学院江苏镇江212013

采用纳秒激光设备对灰铸铁表面进行激光喷丸微造型,制备出不同深度的微凹坑,通过对微造型前后试样表面的相关力学性能测试建立了激光能量与微造型特征(微凹坑深度、残余应力、纳米硬度、弹性模量)之间的对应关系,为获得能量加工参数的... 详细信息

采用纳秒激光设备对灰铸铁表面进行激光喷丸微造型,制备出不同深度的微凹坑,通过对微造型前后试样表面的相关力学性能测试建立了激光能量与微造型特征(微凹坑深度、残余应力、纳米硬度、弹性模量)之间的对应关系,为获得能量加工参数的优化选择提供了依据。

关键词：激光喷丸微造型残余应力纳米硬度弹性模量

在线全文

学校读者我要写书评

暂无评论

丝素蛋白/壳聚糖微球制备及其抗菌性能

纺织学报 2019年第10期40卷 7-12页

作者：张治斌李刚毛森贤厉巽巽陈玉霜毛青山李翼潘志娟王晓沁苏州大学纺织与服装工程学院江苏苏州215123 苏州大学现代丝绸国家工程实验室江苏苏州215123 浙江真爱美家股份有限公司浙江金华322000 曼切斯特大学材料学院曼切斯特M139PL

为开发一种对人体有益且天然无害的抗菌整理剂,采用乳液聚合法制备丝素蛋白/壳聚糖抗菌微球,分析了不同比例下丝素蛋白和壳聚糖制备微球的微观形貌、粒径、二级结构、晶体结构、热稳定性和抗菌性能。结果表明:丝素蛋白质量分数为6%,壳... 详细信息

为开发一种对人体有益且天然无害的抗菌整理剂,采用乳液聚合法制备丝素蛋白/壳聚糖抗菌微球,分析了不同比例下丝素蛋白和壳聚糖制备微球的微观形貌、粒径、二级结构、晶体结构、热稳定性和抗菌性能。结果表明:丝素蛋白质量分数为6%,壳聚糖溶液的质量分数为3%,壳聚糖溶液与丝素蛋白溶液的体积配比为1∶2,所制备的微球形态规整圆滑,粒径均匀分布在0.4~1.4μm之间;其抗菌效果优异,对大肠杆菌和金黄色葡萄球菌的抑菌率分别为(82±4.2)%和(80±2.6)%;在该比例条件下制备的微球的二级结构由silkI型转变为silkII型,热分解起始温度大于250℃,具有良好的热稳定性。

关键词：丝素蛋白壳聚糖微球抗菌性能乳液聚合法

改革开放以来我国图书馆学研究中的理论应用分析

在线全文

学校读者我要写书评

暂无评论

图书馆理论与实践 2022年第4期 29-38页

作者：刘竟王亚楠杨志刚唐江浩卢章平李寻珣江苏大学科技信息研究所江苏科技大学图书馆四川大学公共管理学院

文章以《中国图书馆学报》和《大学图书馆学报》1978—2019年发表的论文为样本,以文献中应用的理论为研究对象,以文献计量统计和内容分析为主要研究方法,以桑基图为分析工具,对改革开放以来我国图书馆学研究中应用的理论进行分析,从理... 详细信息

文章以《中国图书馆学报》和《大学图书馆学报》1978—2019年发表的论文为样本,以文献中应用的理论为研究对象,以文献计量统计和内容分析为主要研究方法,以桑基图为分析工具,对改革开放以来我国图书馆学研究中应用的理论进行分析,从理论应用种类和频次、理论应用时间、理论来源学科、理论所在位置、理论应用类型、理论应用层面以及理论研究主题等几个维度进行统计和关联分析。

关键词：图书馆学理论应用桑基图内容分析学科理论

Dihydrotanshinone I preconditions myocardium against ischemic injury via PKM2 glutathionylation sensitive to ROS

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

Acta Pharmaceutica Sinica B 2023年第1期13卷 113-127页

作者： xunxun Wu lian liu Qiuling Zheng Hui Ye Hua Yang Haiping Hao Ping li State Key Laboratory of Natural Medicines Department of PharmacognosySchool of Traditional Chinese PharmacyChina Pharmaceutical UniversityNanjing 210009China College of Pharmacy China Pharmaceutical UniversityNanjing 210009China State Key Laboratory of Natural Medicines Jiangsu Provincial Key Laboratory of Drug Metabolism and PharmacokineticsChina Pharmaceutical UniversityNanjing 210009China

Ischemic preconditioning(IPC)is a potential intervention known to protect the heart against ischemia/reperfusion injury,but its role in the no-reflow phenomenon that follows reperfusion is *** I(DT)is a natural compound and this study illustrates its role in cardiac ischemic injury from the aspect of *** with DT induced modest ROS production and protected cardiomyocytes against oxygen and glucose deprivation(OGD),but the protection was prevented by a ROS *** addition,DT administration protected the heart against isoprenaline ***,PKM2 reacted to transient ROS via oxidization at Cys423/Cys424,leading to glutathionylation and nuclear translocation in dimer *** the nucleus,PKM2 served as a co-factor to promote HIF-1a-dependent gene induction,contributing to adaptive *** mice subjected to permanent coronary ligation,cardiac-specific knockdown of Pkm2 blocked DT-mediated preconditioning protection,which was rescued by overexpression of wild-type Pkm2,rather than Cys423/424-mutated *** conclusion,PKM2 is sensitive to oxidation,and subsequent glutathionylation promotes its nuclear *** IPC has been viewed as a protective means against reperfusion injury,our study reveals its potential role in protection of the heart from no-reflow ischemia.

关键词： Dihydrotanshinone I Ischemic preconditioning PKM2 Glutathionylation Myocardial ischemia ROS Oxidation modification Nuclear translocation

温度响应涂层棉织物的制备及其可逆润湿性能研究

在线全文

学校读者我要写书评

暂无评论

现代纺织技术 2021年第3期29卷 84-88页

作者：崔妞妞张彩玉李家炜顾健军戚栋明厉巽巽陈玉霜浙江理工大学先进纺织材料与制备技术教育部重点实验室杭州310018 浙江真爱毯业股份有限公司浙江义乌322000

为制备具有耐久稳定的温度响应涂层棉织物,采用自由基共聚法合成了N异丙基丙烯酰胺(NIPAM)与乙烯基三乙氧基硅烷(VTES)的温敏性共聚物(PNIPAM-co-PVTES),然后通过溶胶凝胶法将所合成的温敏共聚物涂覆于棉织物上,制得温度响应涂层棉织物... 详细信息

为制备具有耐久稳定的温度响应涂层棉织物,采用自由基共聚法合成了N异丙基丙烯酰胺(NIPAM)与乙烯基三乙氧基硅烷(VTES)的温敏性共聚物(PNIPAM-co-PVTES),然后通过溶胶凝胶法将所合成的温敏共聚物涂覆于棉织物上,制得温度响应涂层棉织物。借助傅里叶变换红外光谱(FTIR-ATR)、扫描电子显微镜(SEM)和水接触角测试(CA)等对所制得涂层棉织物的结构、形貌和温度响应润湿性能进行表征与分析。结果表明:温度响应共聚物均匀涂覆于棉织物表面,所制得的涂层棉织物具有温度响应的可逆润湿性能。当温度小于32℃时,涂层棉织物表现为亲水性能;当温度大于32℃,表现为疏水性能。涂层棉织物具有耐久稳定的温度响应性,经过5次标准水洗之后,涂层织物在26~42℃保持良好的可逆润湿性。

关键词： LCST温敏聚合物涂层织物温度响应性润湿性能

7-氨基-3-脱乙酰氧基头孢烷酸生产固体废物的处理

在线全文

学校读者我要写书评

暂无评论

化工环保 2012年第6期32卷 545-547页

作者：李珣珣周新基王丽丽钱海霞赵可贵江苏九九久科技股份有限公司江苏如东226400

采用活性炭脱色—蒸馏—萃取—氯气置换的新工艺处理7-氨基-3-脱乙酰氧基头孢烷酸(7-ADCA)生产固体废物。实验结果表明:适宜的活性炭与7-ADCA生产固体废物的质量比为0.8%;以二氯甲烷作为溶剂萃取吡啶,萃取效率较高;在n(氯):n(溴)为1.2时... 详细信息

采用活性炭脱色—蒸馏—萃取—氯气置换的新工艺处理7-氨基-3-脱乙酰氧基头孢烷酸(7-ADCA)生产固体废物。实验结果表明:适宜的活性炭与7-ADCA生产固体废物的质量比为0.8%;以二氯甲烷作为溶剂萃取吡啶,萃取效率较高;在n(氯):n(溴)为1.2时,溴回收率为86.3%;在真空度为0.04 MPa、蒸馏温度为95℃的条件下,对釜底液进一步蒸馏浓缩,最终得到尿素和氯化铵混合固体肥料。与传统方法相比,该工艺不仅提高了经济效益,而且实现了7-ADCA生产固体废物的综合利用。

关键词： 7-氨基-3-脱乙酰氧基头孢烷酸固体废物处理蒸馏萃取

Development of a novel platform for recombinant protein production in Corynebacterium glutamicum on ethanol

在线全文

学校读者我要写书评

暂无评论

Synthetic and Systems Biotechnology 2022年第2期7卷 765-774页

作者： Xinyu Yu Xiuxia liu Xiong Gao xunxun Luo Yankun Yang Ye li Chunli liu Chong Zhang Zhonghu Bai Key Laboratory of Industrial Biotechnology Ministry of EducationSchool of BiotechnologyJiangnan UniversityWuxiChina National Engineering Research Center for Cereal Fermentation and Food Biomanufacturing Jiangnan UniversityWuxiChina Division of life Science The Hong Kong University of Science and TechnologyClear Water BayHong KongChina Jiangsu Provincial Research Center for Bioactive Product Processing Technology Jiangnan UniversityWuxiChina MOE Key Laboratory for Industrial Biocatalysis Institute of Biochemical EngineeringDepartment of Chemical EngineeringTsinghua UniversityBeijingChina Center for Synthetic and Systems Biology Tsinghua UniversityBeijingChina

Corynebacterium glutamicum represents an emerging recombinant protein expression factory due to its ideal features for protein secretion,but its applicability is harmed by the lack of an autoinduction system with tight regulation and high ***,we propose a new recombinant protein manufacturing platform that leverages ethanol as both a delayed carbon source and an ***,we reanalysed the native inducible promoter PICL from the acetate uptake operon and found that its limited capacity is the result of the inadequate translation initial *** two strategies of bicistronic design and ribozyme-based insulator can ensure the high activity of this ***,through transcriptional engineering that alters transcription factor binding sites(TFBSs)and the first transcribed sequence,the truncated promoter PA256 with a dramatically higher transcription level was *** producing the superfolder green fluorescent protein(sfGFP)under 1%ethanol conditions,PA256 exhibited substantially lower protein accumulation in prophase but an approximately 2.5-fold greater final yield than the strong promoter *** superior expression mode was further validated using two secreted proteins,camelid antibody fragment(VHH)and endoxylanase(XynA).Furthermore,utilizing CRISPRi technology,ethanol utilization blocking strains were created,and PA256 was shown to be impaired in the phosphotransacetylase(PTA)knockdown strains,indicating that ethanol metabolism into the tricarboxylic acid cycle is required for PA256 ***,this platform was applied to produce the“de novo design”protein NEO-2/15,and by introducing the N-propeptide of CspB,NEO-2/15 was effectively secreted with the accumulation 281 mg/L obtained after 24 h of shake-flask *** the best of our knowledge,this is the first report of NEO-2/15 secretory overexpression.

关键词： Corynebacterium glutamicum Ethanol Transcriptional engineering Secretory protein overexpression NEO-2/15