检索结果-南通市图书馆

NS1 antigen: A new beam of light in the early diagnosis of dengue infection

在线全文

学校读者我要写书评

暂无评论

Asian Pacific Journal of Tropical medicine 2016年第12期9卷 1187-1189页

作者： muhammad Suleman Rani Faryal muhammad masroor Alam Salmaan Sharif shahzad Shaukat Uzma Bashir Aamir Adnan Khurshid mehar Angez massab Umair mian muhammad Sufian Yasir Arshad Ghulam mujtaba Syed Sohail Zahoor Zaidi Department of microbiology Quaid-i-Azam University Department of Virology National Institute of Health

Objective: To evaluate NS1 antigen detection ELISA for the early laboratory diagnosis of dengue virus infection. methods: The present study was conducted to evaluate the overall positivity of NS1 antigen detection ELISA and its comparison with viral RNA detection via real time PCR and Ig m antibodies detection by ELISA. Results: A total of 1 270 serum samples were tested 86%(1 097/1 270) were detected positive by one or more than one diagnostic test. Out of 1 270, 64%(807/1 270) were positive by NS1 ELISA and 52%(662/1 270), 51%(646/1 270) were positive by real-time RT-PCR and Ig m ELISA ***: NS1 antigen detection ELISA is highly suitable diagnostic tools and it also has great value for use in outbreak and epidemic situation.

关键词： Dengue Pakistan Epidemiology ELISA NS1 Antigen

印度河扇水道堤岸外侧更新世沉积物波发育特征与形成过程分析

在线全文

维普期刊数据库

学校读者我要写书评

暂无评论

古地理学报 2022年第2期24卷 389-404页

作者：浩克纪友亮张胜久刘炎鑫 Khurram shahzad Saad Ahmed mashwani 刘笑语姜燕中国石油大学(北京)油气资源与探测国家重点实验室地球科学学院北京102249 汉堡大学地质研究所德国汉堡哈扎拉大学曼塞拉分校地球与环境科学系巴基斯坦开伯尔-普赫图赫瓦省21300 中国石油华北油田工程技术研究院河北任丘062550

印度河扇更新世发育的沉积物波结构复杂、形态多样,其形成过程的认识程度低。本次研究通过高分辨率地震数据和地震解释技术,研究了印度河扇沉积物波的波长、形态、波峰变化等形态特征;阐述了沉积物波与沉积物变形特征的差异、识别了两... 详细信息

印度河扇更新世发育的沉积物波结构复杂、形态多样,其形成过程的认识程度低。本次研究通过高分辨率地震数据和地震解释技术,研究了印度河扇沉积物波的波长、形态、波峰变化等形态特征;阐述了沉积物波与沉积物变形特征的差异、识别了两者的区分标志;总结了水道堤岸斜坡和区域斜坡上沉积物波的分布规律;在此基础上,讨论了沉积物波的形成机理和控制因素,分析了沉积物波的形成过程,并建立了印度河扇沉积物波的形成模式。研究表明:(1)研究区沉积物波波长平均为486.84 m,最大1473 m;波高在10~60 m之间,平均30 m。(2)沉积物波的形态有对称型和非对称型,其迁移方式有上坡迁移型、加积型和下坡迁移型;沉积物波主要发育在水道堤岸的斜坡上,在区域斜坡上也发育少量的沉积物波,这2种沉积物波波脊的走向差异很大,水道堤岸斜坡上的沉积物波主要分布于水道凹岸堤岸的外侧,距离水道越远其规模(波长、波高)越小,波脊走向近于NE-SW方向,与水道的走向平行或斜交;区域斜坡上的沉积物波波脊的走向多为NW-SE向,平行于区域斜坡的走向,离源区越远规模越大。(3)水道堤岸斜坡上的沉积物波是由水道型浊流在离心力的作用下,溢出水道的凹岸,在堤岸外侧的斜坡上沉积形成的,堤岸斜坡的角度对沉积物波的发育规模影响不大,浊流的强度和输沙量对其规模影响大;区域斜坡上发育的沉积物波是由顺坡而下的非水道化的浊流沉积形成;滑塌变形造成的起伏地貌以及早期沉积物波的存在,也都影响了后期沉积物波的发育。

关键词：沉积物波水道堤岸斜坡浊流更新世印度河扇

种植密度与施氮对河西灌区青贮玉米产量与品质及水分利用效率的影响

在线全文

学校读者我要写书评

暂无评论

Advancement in Wide Area monitoring Protection and Control Using PmU’s model in mATLAB/SImULINK

西北农业学报 2021年第1期30卷 60-73页

作者：王佳李阳贾倩民常生华 shahzad Ali 张程刘永杰侯扶江兰州大学草地农业生态系统国家重点实验室农业农村部草牧业创新重点实验室草地农业教育部工程研究中心草地农业科技学院兰州大学草地农业生态系统国家重点实验室农业农村部草牧业创新重点实验室草地农业教育部工程研究中心草地农业科技学院兰州大学草地农业生态系统国家重点实验室农业农村部草牧业创新重点实验室草地农业教育部工程研究中心草地农业科技学院兰州大学草地农业生态系统国家重点实验室农业农村部草牧业创新重点实验室草地农业教育部工程研究中心草地农业科技学院兰州大学草地农业生态系统国家重点实验室农业农村部草牧业创新重点实验室草地农业教育部工程研究中心草地农业科技学院兰州大学草地农业生态系统国家重点实验室农业农村部草牧业创新重点实验室草地农业教育部工程研究中心草地农业科技学院兰州大学草地农业生态系统国家重点实验室农业农村部草牧业创新重点实验室草地农业教育部工程研究中心草地农业科技学院兰州大学草地农业生态系统国家重点实验室农业农村部草牧业创新重点实验室草地农业教育部工程研究中心草地农业科技学院

为探索河西灌区青贮玉米高产高效的栽培措施,设置67 500株/hm2(L)、82 500株/hm2(m)和97 500株/hm2(H)3个种植密度及不施氮(N0)、施氮120 kg/hm2(N1)、240 kg/hm2(N2)和360 kg/hm2(N3)4个施氮水平.结果表明:在玉米6叶期和12叶期各施氮... 详细信息

为探索河西灌区青贮玉米高产高效的栽培措施,设置67 500株/hm2(L)、82 500株/hm2(m)和97 500株/hm2(H)3个种植密度及不施氮(N0)、施氮120 kg/hm2(N1)、240 kg/hm2(N2)和360 kg/hm2(N3)4个施氮水平.结果表明:在玉米6叶期和12叶期各施氮处理的株高、茎粗、相对叶绿素含量(SPAD)、叶面积指数(LAI)和地上干物质量(ADm)无显著差异,但在灌浆期和收获期m、H密度下,N2和N3的上述指标显著高于N0,且N1、N2和N3的鲜干草产量显著高于N0.在收获期L的SPAD和茎粗显著高于H,而LAI、ADm和鲜干草产量显著低于m和H.N2和N3较N0显著提高粗蛋白、粗脂肪和粗灰分含量,显著降低淀粉和酸性洗涤纤维(ADF)含量,从而提高相对饲用价值(RFV),且N2和N3的各营养成分产量显著高于N0.随种植密度的增加,粗蛋白、淀粉和粗脂肪含量降低,而中性洗涤纤维(NDF)和ADF增高,致使RFV下降,但m和H的粗蛋白、淀粉和粗灰分的产量显著高于L.N1、N2和N3的水分利用效率(WUE)显著高于N0,m和H的WUE显著高于L,所有处理中mN2的WUE最高.因此,82 500株/hm2的种植密度结合240 kg/hma的施氮量是一种适宜河西灌区青贮玉米生产的栽培措施.

关键词：种植密度施氮青贮玉米粗蛋白水分利用效率

来源：评论

学校读者我要写书评

暂无评论

Smart Grid and Renewable Energy 2012年第4期3卷 294-307页

作者： Waheed Ur Rahman muhammad Ali Amjad Ullah Hafeez Ur Rahman majid Iqbal Haseeb Ahmad Adnan Zeb Zeeshan Ali m. Ahsan shahzad Beenish Taj Electrical Engineering Department COMSATS Institute of Information & Technology Abbottabad Pakistan Electrical Engineering Department Gandhara Institute of Science & Technology Peshawar Pakistan Electrical Engineering Department NWFP University of Engineering & Technology Peshawar Pakistan IT Department Hazara University Havelian Abbottabad.

A big step forward to improve power system monitoring and performance, continued load growth without a corresponding increase in transmission resources has resulted in reduced operational margins for many power systems worldwide and has led to operation of power systems closer to their stability limits and to power exchange in new patterns. These issues, as well as the on-going worldwide trend towards deregulation of the entire industry on the one hand and the increased need for accurate and better network monitoring on the other hand, force power utilities exposed to this pressure to demand new solutions for wide area monitoring, protection and control. Wide-area monitoring, protection, and control require communicating the specific-node information to a remote station but all information should be time synchronized so that to neutralize the time difference between information. It gives a complete simultaneous snap shot of the power system. The conventional system is not able to satisfy the time-synchronized requirement of power system. Phasor measurement Unit (PmU) is enabler of time-synchronized measurement, it communicate the synchronized local information to remote station.

关键词： Wide Area monitoring Protection and Control (WAmPAC) Phasor measurement uNit (PmU) Wide Area monitoring (WAm) Global Positioning System (GPS) Wide Area Controller (WAC) Local Area Controller (LAC) Phase Angle monitoring (PAm) Automatic Generation Control (AGC) Circuit Breaker (CB) Current Transformers (CTs) Potential Transformers (PTs)

利用重叠延伸PCR和同源重组克隆技术制备HLA-A＊ 0201/HBc18-27单链三分子复合体

在线全文

维普期刊数据库

学校读者我要写书评

暂无评论

东南大学学报（医学版） 2016年第6期35卷 825-831页

作者：许涛李晓娥吴优 Khawar Ali shahzad 王伟张雷沈传来东南大学医学院病原生物学与免疫学系江苏南京210009

目的：构建和表达HLA-A＊0201/HBc18-27单链三分子复合体。方法：利用重叠延伸PCR将HBc18-27、（Gly4Ser）3、β2m、（Gly4Ser）4和HLA-A＊0201胞外区依次串联为单链三聚体（single-chain trimer,SCT）融合基因,通过同源重组克隆技术插... 详细信息

目的：构建和表达HLA-A＊0201/HBc18-27单链三分子复合体。方法：利用重叠延伸PCR将HBc18-27、（Gly4Ser）3、β2m、（Gly4Ser）4和HLA-A＊0201胞外区依次串联为单链三聚体（single-chain trimer,SCT）融合基因,通过同源重组克隆技术插入到pET28a原核表达载体,用异丙基β-D-硫代吡喃半乳糖苷（IPTG）在大肠杆菌BL21（DE3）中诱导表达,采用金属螯合亲和层析法纯化目的蛋白,通过稀释复性法折叠成HLA-A＊0201/HBc18-27的复合单体,并生物素化,将单体包被到直径4.5μm的磁性微球,用构象特异性单抗（W6/32）进行荧光染色,流式细胞术分析其空间构象。结果：pET28a-HLA-A＊0201/HBc18-27基因序列和蛋白大小与预测一致;纯化后融合蛋白纯度约93%;流式细胞术分析显示pET28a-HLA-A＊0201/HBc18-27单体具有正确的空间构象。结论：利用重叠延伸PCR和同源重组克隆技术成功制备了HLA-A＊0201/HBc18-27的单链复合体,无需限制性内切酶和连接酶,发展了主要组织相容性单链复合体技术,有效简化了pmHCⅠ类分子的制备过程。

关键词：重叠延伸聚合酶链式反应同源重组主要组织相容性复合体

Tigris River Water Quality Quantifying Using the Iraq Water Quality Index (IraqWQI) and Some Statistical Techniques

在线全文

学校读者我要写书评

暂无评论

Engineering（科研） 2024年第6期16卷 149-166页

作者： Nadhir Al-Ansari Salam Hussein Ewaid Ali Chabuk Salwan Ali Abed mudhafar A. Salim Jan Laue Riyadh m. Salih Department of Civil Environmental and Natural Resources Engineering Lule University of Technology Lule Sweden Technical College of Shatra Southern Technical University Basra Iraq Department of Environmental Engineering College of Engineering University of Babylon Babylon Iraq Department of Environment College of Science University of Al-Qadisiyah Diwaniyah Iraq Iraqi Organization for Conservation of Nature IOCN Baghdad Iraq National Center for Water Resources management Ministry of Water Resources Baghdad Iraq

Evaluation of water quality is important for the management of water resources. The current study is focused on the interpretation of the water quality monitoring data of the Tigris River in Iraq by the application of the principal component analysis (PCA), cluster analysis (CA), and water quality index (WQI). Twelve water quality parameters were taken from 14 stations along the river Ca2+, mg2+, Na+, K+, Cl−, SO42−, HCO3−, NO3−, TH, TDS, BOD5, and EC to apply the PCA and CA. The results show that the mean of all the parameters was under the standards except Ca2+, EC, mg2+, TH, and SO42−. The amount of EC is the critical factor that affects the river water quality. The PCA obtained one principal component responsible for 97% of the variation caused by different pollution sources. The CA divided the river into three regions of sampling stations with similar water quality, the best in the north, and the worst in the far south. In this paper, the computer-automated tool (IraqWQI) was presented and evaluated, which has been developed by authors to classify and measure the quality of Iraqi surface water. The proposed index is of hundred degrees and includes six variables for drinking water quality Cl−, TH, TDS, COD, DO, and total coliform (TC) according to the Iraqi specifications. The result of the IraqWQI application showed a decrease in the water quality of the river and its suitability for drinking in the south of the country. The best value of the index was (81.48, Good) in Fishkhabour during winter, and the worst value was (46.23, Bad) in Qurnah during summer. The result of this study proved the success and importance of using statistical techniques and WQI as useful tools for the management, control, and conservation of surface water. .

关键词： Component Formatting Style Styling

5,10,15,20-四（4-羧基苯基）卟啉（TCPP）检测水体痕量Hg2+的研究

在线全文

维普期刊数据库

学校读者我要写书评

暂无评论

应用化工 2019年第12期48卷 3054-3057页

作者：吕向菲吕东 muhammad Asim shahzad 王家宏常江峰李婷长安大学环境科学与工程学院陕西西安710054 陕西科技大学环境科学与工程学院陕西西安710021 国家科技大学巴基斯坦伊斯兰堡999010

由于羧基卟啉在水中良好的溶解性及对Hg^2+的高亲和性,利用5,10,15,20-四(4-羧基苯基)卟啉与Hg^2+反应前后的荧光特性变化,实现水体Hg^2+的痕量检测。结果显示,该探针与Hg^2+具有良好的配位性,且检测前后体系出现的颜色变化具有可视性... 详细信息

由于羧基卟啉在水中良好的溶解性及对Hg^2+的高亲和性,利用5,10,15,20-四(4-羧基苯基)卟啉与Hg^2+反应前后的荧光特性变化,实现水体Hg^2+的痕量检测。结果显示,该探针与Hg^2+具有良好的配位性,且检测前后体系出现的颜色变化具有可视性。在中性条件下,四羧基卟啉荧光被Hg^2+猝灭,荧光强度与汞离子浓度之间存在良好的指数函数关系,相关系数为0.998。因此,5,10,15,20-四(4-羧基苯基)卟啉可作为一种高效、可靠的探针用于水体中Hg^2+的痕量检测。

关键词：羧基卟啉荧光探针痕量检测 Hg^2+

Economics of Residues Incorporation and Phosphorus Application for Direct Seeded Rice and Wheat under Saline Soil

在线全文

学校读者我要写书评

暂无评论

Agricultural Sciences 2015年第9期6卷 934-942页

作者： Imdad Ali mahmood Arshad Ali muhammad Zahid Kiani Armghan shahzad Tariq Sultan Hussain Shah muhammad Arshadullah Badar-uz-Zaman Land Resources Research Institute Islamabad Pakistan National Institute for Genomics and Advanced Biotechnology PARC-Institute of Advanced Studies in Agriculture (The University of Agriculture Peshawar) National Agricultural Research Centre Islamabad Pakistan Crop Disease Research Institute Islamabad Pakistan

Two-year long field study was conducted using a permanent layout to investigate the economics of crop residues incorporation (2 t&middotha-1) and P application (0, 40, 80 and 120 kg P2O5 ha-1) to directly sowing of ri... 详细信息

Two-year long field study was conducted using a permanent layout to investigate the economics of crop residues incorporation (2 t·ha-1) and P application (0, 40, 80 and 120 kg P2O5 ha-1) to directly sowing of rice and wheat crops gown under naturally salt-affected calcareous soil (ECe = 4.59 dS m-1;pHs = 8.38;SAR = 6.57 (mmolc L-1)1/2;CaCO3 = 3.21%;Extractable P = 4.07 mg·kg-1;sandy clay loam) at farmers field in district Hafizabad during the year 2012-13. Split plot design (crop residues in main plots and P application in sub plots) was followed with three replications. Agronomic data on growth and yield were collected at the time of each crop maturity. maximum growth and yield of both the crops were harvested from the plots where P2O5 was applied @ 80 kg·ha-1 along with crop residues incorporation. On an average of two years, maximum paddy (3.26 t·ha-1) and wheat grain (3.56 t·ha-1) yield were produced with P application @ 80 kg P2O5 ha-1 along with crop residues incorporation. Although, the yield harvested with this treatment (80 kg P2O5 ha-1 + crop residues) performed statistically equal to 120 kg P2O5 ha-1 without crop residues incorporation during both the years, however, on an average of two years, grain yield of directly sowing rice and subsequent wheat was significantly superior (22% and 24% respectively) than that of higher P rate (120 kg·ha-1) without crop residues. Overall, continuous two-year crop residues incorporation further increased (17%) paddy yields during the follow up year of crop harvest. Economic analyses of both the crops were carried out to choose the best treatment with adequate economic benefits as compared to those without crop residue incorporation. maximum net benefit of Rs = 108,680/- for direct seeded rice and Rs = 99,362/- for wheat grown with 80 kg P2O5 ha-1 application under crop residues incorporation was determined. Among P application treatments without crop residues incorporation, the maximu

关键词： Crop Residues Incorporation P Application Direct Seeded Rice and Wheat Saline Soil Economic Analysis

Preparation and Structural Properties of ZnAl_xFe_2-xO₄ Spinel Oxide

在线全文

维普期刊数据库

学校读者我要写书评

暂无评论

American Journal of Analytical Chemistry 2016年第2期7卷 203-209页

作者： shahzad Hossain Goutam Dev mst. Sanjida Aktar muhammad Kamrul Hasan A. K. m. Zakaria Tapash Kumar Datta Imtiaz Kamal Sk. md. Yunus md. Habibul Ahsan Abul Kalam Azad Institute of Nuclear Science & Technology Bangladesh Atomic Energy Commission Dhaka Bangladesh Faculty of Integrated Technologies Universiti Brunei Darussalam Gadong Brunei Darussalam Department of Physics Shahjalal University of Science and Technology Sylhet Bangladesh

The ZnAlxFe2-xO4 (x = 0.0, 0.2 and 0.4) spinel ferrites were prepared by the conventional solid state reaction in air at 1350°C. The X-ray diffraction of all the three samples showed sharp Bragg peaks indicating the formation of a single phase spinel structure. The lattice parameters of the samples were determined from the X-ray diffraction data using the Nelson-Riley extrapolation method. The lattice parameters, cation distribution and oxygen position parameters have also been determined by refining the data by the Rietveld method. Rietveld refinement of the XRD data reveals all the samples to possess cubic symmetry corresponding to the space group Fd3m. Lattice parameters were found to decrease with increasing Al concentration, i.e. 8.4322, 8.4002, and 8.3984 Åfor x = 0.0, 0.2 and 0.4, respectively.

关键词： Polycrystalline Ferrite X-Ray Diffraction Spinel Ferrite Rietveld Refinement Space Group Fd3m Lattice Parameter