检索结果-南通市图书馆

发挥高校科研实验室作用,加强大学生创新能力培养

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

实验技术与管理 2010年第9期27卷 21-23页

作者：李范珠包强赵燕敏陈苹苹阮叶萍杨元宵浙江中医药大学药学院

以培养大学生创新能力为切入点,探讨高校科研实验室利用自身优势承担大学生创新实验的基本思路,阐述高校科研实验室在大学生创新能力的培养中的作用,并且提出要进一步发挥其作用,加强大学生创新能力的培养。

关键词：高校科研实验室大学生创新能力培养

β-asarone对Aβ_(1-42)激活的ACM所致PC12细胞损伤的保护作用研究

在线全文

学校读者我要写书评

暂无评论

中国临床药理学与治疗学 2018年第6期23卷 608-613页

作者：何潆包玉婷姚莹宣玲杨元宵杭州市红十字会医院浙江中医药大学杭州医学院

目的:探讨不同浓度β-淀粉样蛋白(Aβ_(1-42))激活的星形胶质细胞条件培养液(ACM)对PC12细胞存活率及脑源性神经营养因子(BDNF)、乙酰胆碱酯酶(ACh E)蛋白表达的影响,以及β-细辛醚(β-asarone)的保护作用。方法:首先,将对数生长期的PC1... 详细信息

目的:探讨不同浓度β-淀粉样蛋白(Aβ_(1-42))激活的星形胶质细胞条件培养液(ACM)对PC12细胞存活率及脑源性神经营养因子(BDNF)、乙酰胆碱酯酶(ACh E)蛋白表达的影响,以及β-细辛醚(β-asarone)的保护作用。方法:首先,将对数生长期的PC12细胞随机分为正常对照组、ACM(Aβ1-423.3μmol/L)组、ACM(Aβ_(1-42)10μmol/L)组、ACM(Aβ1-4230μmol/L)组,分别采用实时无标记动态细胞分析技术(Real Time Cell Analysis,RTCA)和MTT法检测各组PC12细胞的存活率,Western blot检测PC12细胞BDNF、ACh E蛋白的表达;其次,将对数生长期的PC12细胞随机分为正常对照组、ACM(Aβ_(1-42)10μmol/L)组、β-asarone(18.5、55.5、166.7μg/mL)组,RTCA法检测PC12细胞存活率的改变,Western blot检测PC12细胞BDNF、ACh E蛋白表达的变化。结果:ACM作用24 h,各组PC12细胞存活率无统计学差异(P>0.05),ACM作用36 h,ACM(Aβ1-4210μmol/L)组、ACM(Aβ_(1-42)30μmol/L)组PC12细胞存活率显著降低(P<0.01);BDNF、ACh E蛋白表达随Aβ_(1-42)浓度增加显著升高(P<0.05或P<0.01);β-asarone(18.5、55.5、166.7μg/mL)能显著提高PC12细胞的存活率,β-asarone(55.5、166.7μg/mL)组ACh E表达相比于模型组显著下降(P<0.05或P<0.01),β-asarone(55.5μg/mL)组与模型组比较BDNF表达增加(P<0.05)。结论:β-asarone能抑制ACh E的上调,对BDNF的表达有促进作用,提示β-asarone对神经元细胞有一定的保护作用。

关键词： β-asarone Aβ1-42 ACM PC12细胞 BDNF AChE

Phosphorus transformation under the influence of aluminum,organic carbon,and dissolved oxygen at the water-sediment interface:A simulative study

在线全文

学校读者我要写书评

暂无评论

Frontiers of Environmental Science & Engineering 2020年第3期14卷 165-176页

作者： Ouchen Cai yuanxiao Xiong Haijun yang Jinyong Liu Hui Wang State Key Joint Laboratory on Environmental Simulation and Pollution Control School of EnvironmentTsinghua UniversityBeijing 100084 Beijing 101 Middle School Beijing 100091China Department of Chemistry Tsinghua UniversityBeijing 100084China

The effects of sediment aluminum(Al),organic carbon(OC),and dissolved oxygen(DO)on phosphorus(P)transformation,at the water-sediment interface of a eutrophic constructed lake,were investigated via a series of simulative *** above three factors had various influences on dissolved P concentration,water pH,water and surface sediment appearance,and P *** of Al had the greatest effect on suppressing P release,and the water p H remained alkaline in the water-sediment system under various OC and DO *** dissolution of the added Al was detected.31P-N M R characterization suggested that OC addition did not promote biological P uptake to polyphosphates under oxic *** simulation result on the added phytate indicated the absence of phytate in the original lake *** compared to the reported natural lakes and wetland,the water-sediment system of the constructed lake responded differently to some simulative *** Al,OC,and DO can be controlled with engineering methods,the results of this study provide insights for the practical site restorations.

关键词： Phosphorus Sediment Simulation Dissolved oxygen Organic carbon Aluminum

A Tight Approximation Algorithm for Multi-Vehicle CVRP with Unsplittable Demands on a Line

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 Systems Science & Complexity 2022年第5期35卷 1902-1909页

作者： WU yuanxiao LU Xiwen School of Science East China University of Science and TechnologyShanghai 200237China

In this paper,the authors study the multi-vehicle capacitated vehicle routing problem on a line-shaped network with unsplittable *** objective is to find a transportation scheme to minimize the longest distance traveled by a single vehicle such that all the customers are served without violating the capacity *** authors show that this problem has no polynomialtime algorithm with performance ratio less than 2 on condition that P≠NP,and then provide a 2-approximation algorithm.

关键词： Approximation algorithm network unsplittable demand vehicle routing worst-case analysis

Simultaneous removal of Cd(Ⅱ)and As(Ⅴ)by ferrihydrite-biochar composite:Enhanced effects of As(Ⅴ)on Cd(Ⅱ)adsorption

在线全文

学校读者我要写书评

暂无评论

Journal of Environmental Sciences 2024年第5期139卷 267-280页

作者： Wenjun Zeng yang Lu Jingyan Zhou Jie Zhang yuanxiao Duan Changxun Dong Wencheng Wu College of Sciences Nanjing Agricultural UniversityNanjing 210095China South China Institute of Environmental Sciences Ministry of Ecology and EnvironmentGuangzhou 510655China Guangdong Engineering&Technology Research Center for System Control of Livestock and Poultry breeding Pollution Guangzhou 510655China

The coexistence of cadmium(Cd(Ⅱ))and arsenate(As(Ⅴ))pollution has long been an environmental ***,a porous carbonaceous material with tunable functionality,has been used for the remediation of contaminated ***,it is still challenging for the dynamic quantification and mechanistic understanding of the simultaneous sequestration of multi-metals in biochar-engineered environment,especially in the presence of *** this study,ferrihydrite was coprecipitated with biochar to investigate how ferrihydritebiochar composite affects the fate of heavy metals,especially in the coexistence of Cd(Ⅱ)and As(Ⅴ).In the solution system containing both Cd(Ⅱ)and As(Ⅴ),the maximum adsorption capacities of ferrihydrite-biochar composite for Cd(Ⅱ)and As(Ⅴ)reached 82.03μmol/g and 531.53μmol/g,respectively,much higher than those of the pure biochar(26.90μmol/g for Cd(Ⅱ),and 40.24μmol/g for As(Ⅴ))and ferrihydrite(42.26μmol/g for Cd(Ⅱ),and 248.25μmol/g for As(Ⅴ)).Cd(Ⅱ)adsorption increased in the presence of As(Ⅴ),possibly due to the changes in composite surface charge in the presence of As(Ⅴ),and the increased dispersion of ferrihydrite by *** microscopic and mechanistic results showed that Cd(Ⅱ)complexed with both biochar and ferrihydrite,while As(Ⅴ)was mainly complexed by ferrihydrite in the Cd(Ⅱ)and As(Ⅴ)coexistence *** posed vital importance for the co-adsorption of Cd(Ⅱ)and As(Ⅴ).The different distribution patterns revealed by this study help to a deeper understanding of the behaviors of cations and anions in the natural environment.

关键词： Ferrihydrite Biochar Cadmium Arsenate Simultaneous sequestration Binding mechanisms

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

螺旋桨副作用抵消策略及其在航模中的应用

科技风 2023年第35期 150-152页

作者：杨远骁孙永辉万鹏汤飞鹏张彬华南昌航空大学江西南昌330063

随着航空工业的发展,越来越多的非专业领域的航空爱好者能通过以航模为代表的各种形式接触到航空领域。而航模中最常见的也是入门者选择最多的螺旋桨航模却有着和真正的螺旋桨飞机同样的问题:螺旋桨副作用。螺旋桨各类副作用会影响到航... 详细信息

随着航空工业的发展,越来越多的非专业领域的航空爱好者能通过以航模为代表的各种形式接触到航空领域。而航模中最常见的也是入门者选择最多的螺旋桨航模却有着和真正的螺旋桨飞机同样的问题:螺旋桨副作用。螺旋桨各类副作用会影响到航模飞机的操控性能,导致容易失控损坏,极大地提高了入门成本。本文将通过汇总四类螺旋桨副作用及其抵消策略,综合讨论后得出采用共轴反桨发动机是运用于航模中的最佳方案。

关键词：螺旋桨滑流效应滑流反扭矩 p效应航模

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

湿热处理改性淀粉的研究进展

食品与发酵工业 2025年第1期51卷 354-362,372页

作者：黄薇刘远晓李萌萌关二旗卞科河南工业大学粮油食品学院河南郑州450001

湿热处理是常见的淀粉物理改性方法,适当的湿热处理可以有效改变淀粉的颗粒结构、分子结构等,从而影响其溶胀、糊化、老化等理化特性,进而改善食品品质。该文首先介绍了湿热处理的原理和特点,然后分析了湿热处理对淀粉结构和理化特性的... 详细信息

湿热处理是常见的淀粉物理改性方法,适当的湿热处理可以有效改变淀粉的颗粒结构、分子结构等,从而影响其溶胀、糊化、老化等理化特性,进而改善食品品质。该文首先介绍了湿热处理的原理和特点,然后分析了湿热处理对淀粉结构和理化特性的影响,最后探讨了湿热处理在面条、面包、饼干等食品加工中的应用,旨在加深对湿热处理的认识,并为促进湿热处理在改性淀粉和提高淀粉基食品安全和品质中的应用提供理论依据和科学建议。

关键词：湿热处理植物淀粉结构理化性质淀粉基食品

在线全文

学校读者我要写书评

暂无评论

流通领域钢筋产品质量快速检测方法研究

质量与认证 2025年第1期 67-69页

作者：李元孝王帅崔岩山东省产品质量检验研究院

随着城市建设的飞速发展,钢筋产品的需求日益增大,一些不法商人以瘦身钢筋取代正常钢筋,对钢筋市场造成极大的冲击,搅乱了钢筋市场的秩序,严重侵犯了消费者的切身利益。传统的钢筋检验周期长、检验费用高、程序繁琐,研究一种钢筋的快速... 详细信息

随着城市建设的飞速发展,钢筋产品的需求日益增大,一些不法商人以瘦身钢筋取代正常钢筋,对钢筋市场造成极大的冲击,搅乱了钢筋市场的秩序,严重侵犯了消费者的切身利益。传统的钢筋检验周期长、检验费用高、程序繁琐,研究一种钢筋的快速检测方法迫在眉睫。本文期望通过对钢筋快速检测的研究分析,来实现钢筋产品在较短时间内获得准确检测结果,以打击不法商贩的违法行为。

关键词：瘦身钢筋抽样快速检测穿水工艺

Biodegradation of azo dyes by genetically engineered azoreductase

在线全文

学校读者我要写书评

暂无评论

Journal of Environmental Sciences 2005年第4期17卷 545-550页

作者： WANGJing YANBin ZHOUJi-ti BAOYong-ming LUHong yuanxiao-dong SchoolofEnvironmentalandBiologicalScienceandTechnology DalianUniversityofTechnologyDalian116023

A azoreductase gene with 537 bp was obtained by PCR amplification from Rhodobacter sphaeroides AS1 1737 The enzyme, with a molecular weight of 18 7 kD, was efficiently expressed in Escherichia coli and its biodegradation characteristics for azo dyes were investigated. Furthermore, the reaction kinetics and mechanism of azo dyes catalyzed by the genetically engineered azoreductase were studied in detail. The presence of a hydrazo-intermediate was identified, which provided a convincing evidence for the assumption that azo dyes were degraded via an incomplete reduction stage.

关键词： genetically engineered microorganisms azoreductase biodegradation azo dyes