Design and Implementation of Laboratory Opening Management System Based on ASP.NET

高校实验的直接承担者和载体是高校实验室，高校实验室在高校整个教学体系中占据着很重要的地位，它具有很丰富的大型或者先进的仪器和设备。高校实验室的建立，一方面能为高校学生提供锻炼自身实践能力和动手操作能力，另一方面也能为学生的课外实践学习和锻炼提供一个平台。高校实验室的建立，不仅仅能够实现高校学生的素质教育，而且能够提高高校学生的创新能力和实践能力的重要场所。目前，随着高校招生规模的扩大，使得实验室中的资源分配不均衡、传统的实验室管理方式比较落后。利用信息技术，推动高校实验室教学改革，逐步成为提高高校实验室管理质量和管理水平的必然选择。本课题结合某高校在实验室管理模式中出现的问题，以开放式实验室管...University Laboratory experiments are carried out directly bear, the whole education system is a very important part of a large and perhaps with very rich advanced instruments and equipment. University laboratories can provide a base for the training of the student’s hands-on skills and training students in practical ability, but also a platform for students to learn and practice extracurricular e...学位：工程硕士院系专业：软件学院_工程硕士(软件工程)学号：X201323186

Empirical Analysis on Impacts of Migration with and without Hukou Change on China's Provincial Economy

在对近十年来我国人口迁移和流动的时空演变格局进行初步考察的基础上,文章利用面板数据的变系数模型分别实证考察了人口迁移和流动对我国各地区(省域)经济的影响。结果发现:(1)我国各地区间人口迁移相对平稳,而人口流动在2000年以后呈现出持续快速增长的态势,且空间流向极不均衡;(2)人口的迁移和流动对中国整体经济来说是一个帕累托改进;(3)户籍制度对于发达地区起到了人才沙漏的作用;(4)对于中部的绝大部分地区以及西部的一些人口输出大省,伴随人口迁出而引起的人力资本流失对当地经济的负面影响开始凸显出来,人口流出虽然基本出现一个正面影响,但对本地经济发展的贡献并不如我们预想的那么明显。Based on the preliminary investigation of spatial and temporal patterns of migration with and without hukou(i.e.,the household registration system)change and drawing on panel data in the past ten years,this paper uses random coefficient models to examine the impacts of migration on provincial economy growth in China.Analytical results show that:(a) migrations with hukou change across regions have been relatively stable,while migration without hukou change has increased rapidly and continuously since 2000 with extreme disparities across provinces;(b) the migration and mobility of the population is a Pareto improvement for China's overall economy;(c) hukou in developed areas plays a role as the hourglass;(d) for most central provinces and some western provinces with large-size of out-migration,the negative impact of the loss of human capital due to large-scale out-migration on local economy began to come out;although out-migration has in general a positive impact,its contribution to local economic development is not as obvious as we expected.教育部人文社科重点研究基地基金项目“我国地区间收入分配差异与劳动力转移的经济增长效应分析”(07JJD790145);国家社科重大基金研究项目“扩大内需的宏观经济政策研究”(08&ZD034)的资

ANCA相关性血管炎肾损害的中医证候及与临床相关性研究

目的:观察抗中性粒细胞胞浆抗体(ANCA)相关性血管炎(AAV)肾损害患者中医证候特征及分布规律,探讨其与临床、实验室指标的关系,为AAV肾损害的中医诊断和辨证施治提供线索。方法:收集AAV肾损害患者中医症状体征,进行证候判定,采空腹静脉血查Hb、白蛋白(Alb)、补体C3、C-反应蛋白(CRP)、BUN、Scr、血浆D-二聚体(D-D)等指标,进行肾损害程度及BVAS活动性评分,探讨各中医证候与临床实验指标间的关系及规律。结果:AAV肾损害的中医证候分布情况为:脾肾两虚型52例(41. 6%)、气阴两虚型38例(30. 4%)、湿热内蕴型19例(15. 2%)、肺脾气虚型16例(12. 8%)。冬、春季以脾肾两虚及气阴两虚型多见,夏季以气阴两虚型多见(P <0. 05)。各证型组的Hb、Alb、C3水平按气阴两虚型、脾肾两虚型、湿热内蕴型依次降低,D-D、Scr、BVAS评分值依次增高。与湿热内蕴证比较,气阴两虚、脾肾两虚Hb升高(P <0. 05)、Scr降低(P <0. 05),气阴两虚、脾肾两虚D-D、BVAS评分降低(P <0. 05)。结论:AAV肾损害的中医证型以脾肾两虚型最多见,湿热内蕴型的肾损害更重、BVAS评分更高。福建省自然科学基金资助项目(No.2014J01430

70年来中国化学海洋学研究的主要进展

我国的海洋化学工作者通过70年来,特别是近30年来的化学海洋学研究,实现了我国与世界先进水平进入同步发展的快车道,其显著的特点是:(1)化学海洋学研究从元素地球化学分布系统转向了以揭示深层次海洋生物地球化学过程为核心的研究;(2)化学海洋学研究实现了多领域、多视点的综合交叉研究;(3)更加关注了人为影响与自然变化共同作用下的海洋生态环境变化研究,对近海和海岸带而言,更加注重从海陆统筹一体化角度探析化学物质的分布迁移特征。本文从生源要素的海洋生物地球化学过程、微/痕量元素与同位素的海洋化学研究、生物过程作用下的化学海洋学过程等角度,重点总结归纳和分析了30年来我国海洋化学研究的重要进展和发展状况,以期对化学海洋学的进一步研究提供借鉴和启迪。中国科学院战略性先导科技专项(XDA23050501)国家基金委–山东省联合基金项目(U1606404

太平洋白对虾(Penaeus vannamei)β-N-乙酰-D-氨基葡萄糖苷酶在二甲亚砜溶液中的失活动力学(英文)

应用动力学方法研究了太平洋白对虾(Penaeusvannamei)β-N-乙酰-D-氨基葡萄糖苷酶在二甲亚砜溶液中以pNP-β-D-GlcNAc为底物时酶活力的变化规律.表明酶在DMSO浓度低于4.20mol/L,酶的失活过程是可逆的,DMSO并不造成酶绝对量的减少,仅对酶的活力发生可逆的下降.测得DMSO对酶抑制的IC50为1.2mol/L.观测了在不同底物浓度下NAGase在0、0.35、0.70、1.05、1.40、1.75mol/L的DMSO溶液中的失活过程,分别测定了游离酶(E)和酶-底物络合物(ES)的微观失活速度常数k+0和k′+0比较结果(k+0值远远大于k′+0)表明,在DMSO溶液中游离酶比酶-底物络合物更易失活,即底物的存在对于酶被DMSO的失活具有明显的保护作用.随着DMSO浓度的增加,游离酶的逆向微观复活速度常数k-0却不断降低,说明在高浓度DMSO环境中,NAGase可逆恢复的能力逐渐微弱

血清高迁移率族蛋白B1在ANCA相关性小血管炎肾损害血瘀证患者的表达及意义

目的:探讨血清高迁移率族蛋白B1(HMGB1)在抗中性粒细胞胞浆抗体(ANCA)相关性小血管炎(AASV)肾损害瘀血阻滞证患者的表达及意义。方法:采取前瞻性研究,中医辨证就诊的AASV肾损害患者血瘀证的分布情况;采用酶联免疫吸附法(ELISA)检测AASV肾损害血瘀患者血清HMGB1水平,并与24 h尿蛋白定量、血Hb、Alb、CRP、D-二聚体、BUN、Scr、GFR、肾损害程度、ANCA、伯明翰血管炎活动积分(BVAS)等因素进行相关性分析,探讨HMGB1在AASV肾损害瘀血阻滞型患者中的意义。结果:AASV肾损害中医证候分布以脾肾两虚证(42.85%)、气阴两虚证(30.95%)多见,其中57.14%兼有瘀证。AASV肾损害血瘀证患者血清HMGB1水平明显升高(P0.05)。结论:血清HMGB1可能与AASV肾损害瘀血阻滞的发病有一定关系。福建省自然科学基金资助项目(No.2014J01430

Biological nitrogen fixation in the upper water column in the south Taiwan Strait during summer 2011

2011年6—7月,利用15n2示踪法实测了台湾海峡南部海域的生物固氮速率,结合温度、盐度、天然颗粒物氮同位素组成的分布,分析并讨论了影响研究海域生物固氮速率的环境因素。结果表明,夏季台湾海峡南部海域的生物固氮速率介于168—1080 nMOl M-3d-1之间,平均为537 nMOl M-3d-1,较高的生物固氮速率大多出现在次表层水体中。研究站位的积分固氮速率变化范围为11—40μMOl M-2d-1,平均为23μMOl M-2d-1。积分固氮速率的空间变化与不同水团的影响有关,在受黑潮水影响的海域,生物固氮速率较高,而在上升流和受河流冲淡水影响的海域,生物固氮速率较低,说明较低的水温及较高的无机氮营养盐可能会抑制研究海域的生物固氮作用。研究海域天然颗粒物δ15n与生物固氮速率之间呈现良好的负相关关系,表明天然颗粒物氮同位素组成可定性指征研究海域生物固氮作用的强弱。Biological N2fixation in marine environments is a major component in the ocean nitrogen budget and plays an important role in global carbon cycles through the sequestration of atmospheric carbon dioxide and production of marine organic matter.N2fixation could be regulated by the abundance and chemical speciation of nutrients and many trace elements in seawater.Recent studies have revealed that N2fixation is much more widespread in marine environments than previously thought.However,little is known about the N2fixation in the Taiwan Strait,especially on N2fixation rates,and their relationship with environmental parameters.The major objectives of this study were to determine the N2fixation rates and their spatial distributions and to explore major physicochemical controlling factors in the south Taiwan Strait.During June and July 2011,seawater samples were collected from ten stations at two transects in the south Taiwan Strait for the measurements of N2fixation rate using the15N2tracer assay.Particulate nitrogen and its isotopic composition were measured with an elemental analyzer(Carlo Erba NC 2500) coupled with a Finnigan MAT DeltaplusXP isotope ratio mass spectrometer.Reproducibility of nitrogen isotope measurements(in terms of δ15N) was within 0.2‰.Our results showed that N2fixation rates in the south Taiwan Strait ranged from 168—1080 nmol m-3d-1with an average of 537 nmol m-3d-1.Most of the high rates were observed at subsurface layers.The depth-integrated N2fixation rates were 11—40 μmol m-2d-1with an average of(23±10) μmol m-2d-1.The distribution of the N2fixation rates showed regional variations with influence from water masses with distinctive temperature and salinity.Higher N2fixation rates were mostly observed in the regions influenced by the Kuroshio,with an average of 31 μmol m-2d-1,while lower rates occurred in the upwelling and river plume regions with an average of 15 μmol m-2d-1.This spatial distribution pattern indicated that biological N2fixation was largely impeded by the low temperature and the high concentration of dissolved inorganic nitrogen in the south Taiwan Strait.The contribution of N2fixation in the study area could be further quantified based on the δ15N signatures of suspended particles which could be significantly depleted during N2fixation.Indeed,a negative correlation between the δ15N signatures of suspended particles and N2fixation rates was observed regardless of using all data points or depth-averaged values within the water column.This indicated that15N-depleted particles were largely derived from the enhanced N2fixation,supporting the use of nitrogen isotopic composition(δ15N) of suspended particles as a potential indicator of N2fixation in the south Taiwan Strait.Further studies are needed to better elucidate the relationship between N2fixation rates and limiting elements and their chemical speciation,and thus the physical and biogeochemical controls on N2fixation in the south Taiwan Strait.国家自然科学基金资助项目(41125020;41076043;41206062); 国际海域资源调查与开发“十二五”项目(DY125-13-E-01

金属离子对锯缘青蟹NAGase活力的影响

本文研究了几种金属离子对锯缘青蟹(Scylla serrata)N-乙酰-β-D-氨基葡萄糖苷酶(NAGase)活力的影响.其结果表明:Li+、Na+和K+对酶活力没有明显影响,Mg2+、Ca2+和Ba2+对该酶均有激活作用,激活程度依次为Ca2+>Ba2+>Mg2+.A l3+、Fe3+、Cd2+、Pb2+和Hg2+对该酶具有一定的抑制作用,2.0μmol/dm3的Hg2+可以使酶活力完全丧失.Co2+对酶的效应是先激活后抑制,Mn2+对酶仅有轻微的激活作用.Cd2+和Fe3+对锯缘青蟹NAGase的抑制作用都呈竞争性-反竞争性混合Ⅱ型效应,Cd2+的抑制常数KI和KIS分别为23.9、5.0 mmol/dm3,Fe3+的抑制常数KI和KIS分别为395.5、135.6μmol/dm3.KI>KIS,说明酶-底物络合物(ES)与抑制剂的亲和力比游离酶(E)与抑制剂的亲和力大

丙酮对锯缘青蟹N-乙酰-β-D-氨基葡萄糖苷酶活力与构象的影响

以丙酮为效应物,研究其对锯缘青蟹(Scylla serrata)N-乙酰--βD-氨基葡萄糖苷酶(NAGase)活力的影响,结果表明:该酶的剩余活力随着丙酮浓度增大而呈指数下降,当丙酮浓度达25%,酶的剩余活力仅为20%,说明丙酮对青蟹NA-Gase有明显的失活作用.导致酶活力丧失50%的丙酮浓度为7.5%.在较低丙酮浓度(<10%)的失活是可逆的反应过程.动力学研究表明,该酶的失活过程属于混合型,并进一步测定游离酶(E)和酶底物络合物(ES)与丙酮的结合常数(KI和KIS),分别为4.06%和10.49%,KI<KIS,说明底物存在对酶被丙酮的失活作用有一定的保护作用.应用荧光发射光谱研究青蟹NAGase经丙酮微扰后的分子构象变化情况,结果表明:丙酮对酶分子构象有显著的影响,酶的内源荧光强度随丙酮浓度增大而降低,说明酶分子中的生色基团Trp和Tyr残基的微环境发生了变化