|
|
|
题名
|
作者
|
年代
|
出处
|
被引量
|
| 1 | Transfer of Heavy Metals from Soils to Vegetables and Associated Human Health Risks at Selected Sites in Pakistan显示文摘Contamination of the food chain with heavy metals is considered as one of the major environmental pathways of human exposure to metals leading to potential health risks. This study aimed to investigate the concentrations of heavy metals such as copper(Cu),zinc(Zn), chromium(Cr), nickel(Ni), and manganese(Mn) in agricultural soils and food crops(fruit, leaf, and root vegetables), and their associated health risks to the local population in selected southern districts of Khyber Pakhtunkhwa Province, Pakistan. The concentrations of the selected metals in soil varied over a wide range, in the following decreasing order: Mn > Zn > Cr > Ni > Cu.The bioaccumulation of metals in vegetables was within the permissible risk limits, except for Cr which showed higher contamination in all the tested food crops. The trend of metal transfer factors for different vegetables was in the order of Cu > Ni > Cr > Mn >Zn, while the calculated daily intake of metals(DIM) in adults and children through consumption of food crops was in the decreasing order of Mn > Zn > Ni > Cr > Cu. The health risk index(HRI) values for the heavy metals for both adults and children were less than 1. Therefore, no significant health risk is anticipated for the local consumers through ingestion of these food crops. | Zahir Ur REHMAN Sardar KHAN Mohammad Tahir SHAH Mark L.BRUSSEAU Said Akbar KHAN Jon MAINHAGU | 2018 | Pedosphere2018，28，4： | 7 |
| 2 | In vivo and in vitro phytochemical and antibacterial efficacy of Baliospermum montanum (Willd.) Muell.Arg.显示文摘Objective:To evaluate the phytochemical and anti-bacterial potential of mother plants in vivo and in vitro derived callus of Baliospermum montanum(B.montanum)(Willd.) Muell.-Arg. leaves and root.Methods:The in vitro derived rootlets and leaves segments of B.montanum were cut into 0.5-0.7 cm in length and cultured on Murashige and Skoog solid medium supplemented with 3%sucrose,gelled with 0.7%agar and different concentration of 2,4-D either alone or in combinations.The preliminary phytochemical screening was performed by Harborne method.Antibacterial efficacy was performed by well diffusion method and incubated for 24 h at 37℃.Results:The highest percentage of callus formation(leaves segments 86.9±0.56:root segments 78.7±0.51) was obtained on Murashige and Skoog’s basal medium supplemented with 3%sucrose and 2.0 mg/L of 2.4-Dichlorophenoxy acetic acid.The phytochemical study revealed the high quantity presence of steroids,triterpenoids,glycosides,saponins,alkaloids,flavanoids, phenolic compounds,tannins,sugars etc of root and leaves derived calli.The ethanol extract of leaves segment derived calli of B.montanum showed the maximum solubility and antimicrobial activity with the MIC ranged from 100 to 200μL.Conclusions:The preliminary phytochemical study confirmed that the calli mediated tissues showed the higher percentage of metabolite constituents and extraction value compared to the in vivo leaves and roots.The present study observation suggested that a possibility to establish high yielding genotypes by in vitro culture for production of medicinally important bioactive compounds. | Johnson M Wesely EG Zahir Hussain MI Selvan N | 2010 | Asian Pacific Journal of Tropical Medicine2010，3，11： | 6 |
| 3 | 对数正态分布衰落下的光OFDM水下可见光通信空间分集系统显示文摘水下可见光通信(UVLC)是实现高速宽带信息传输的有效方案,但由于受到信道中吸收、散射和湍流的不利影响而面临着许多困难。针对水下湍流信道中多径和衰落带来的影响,提出了一种光正交频分复用(O-OFDM)等增益合并的分集方案,根据广义的朗伯定律得到信道增益,通过对数正态分布模拟信号衰落。采用蒙特卡洛方法对正交幅度调制(QAM)的非对称削波光正交频分复用(ACOOFDM)和直流偏置光正交频分复用(DCO-OFDM)两种分集系统进行建模仿真,分析高斯信道和弱湍流信道下系统的误比特率,探讨不同分集数目和闪烁系数情况下的分集增益。研究结果验证了分集是降低湍流影响的有效手段,有利于改善水下信息传输性能,为弱湍流信道下正交频分复用可见光通信系统的设计、预测和评估提供参考。 | 蒋红艳 仇洪冰 何宁 吴越 Zahir Ahmad Sujan Rajbhandari | 2020 | 红外与激光工程2020，49，2： | 5 |
| 4 | Larvicidal and repellent activity of medicinal plant extracts from Eastern Ghats of South India against malaria and filariasis vectors显示文摘Objective:To evaluate the larvicidal and repellent activities of ethyl acetate and methanol extracts of Acacia concinna(A.concinna),Cassia siamea(C.siamea).Conundrum sativum(C. sativum),Cuminum cyminum(C.cyminum),Lantana camma(L.camara),Nelumbo nucifera (N.nucifera) Phyllanlhus amarus(P.amarus).Piper nigrum(P.nigrum) and Trachyspermum ammi(T.ammi) against Anopheles stephensi(An.stephensi) and Culex quinquefasciatus(Cx. quinquefasciatus).Methods:The larvicidal activity of medicinal plant extracts were tested against earl) fourth-instar larvae of malaria and filariasis vectors.The mortality was observed 24 h and 48 h after treatment,data were subjected to probit analysis to determine the lethal concentrations(LC50 and LC90) to kill 50 and 90 per cent of the treated larvae of the tested species. The repellent efficacy was determined against two mosquito species at five concentrations(31.25. 62.50.125.00.250.00,and 500.00 ppm) under the laboratory conditions.Results:All plant extracts showed moderate effects after 24 h and 48 h of exposure;however,the highest activity was observed after 24 h in the leaf methanol extract ol N.nucifera.seed ethyl acetate and methanol extract of P.nigrum against the larvae of An.Stephensi(LC50 = 34.76.24.54 and 30.20 ppm) and against Cx.quinquefasciatus(LC50= 37.49.43.94 and 57.39 ppm),respectively.The toxic effect of leaf methanol extract of C.siamea,seed methanol extract of C.cyminum,leaf ethyl acetate extract of N.nucifera.leaf ethyl acetate and methanol extract of P.amarus and seed methanol extract of T.ammi were showed 100%mortality against An.stephensi and Cx.quinquefasciatus alter 48 h exposer.The maximum repellent activity was observed at 500 ppm in methanol extracts of N. nucifera.ethyl acetate and methanol extract of P.nigrum and methanol extract of T.ammi and the mean complete protection time ranged from 30 to 150 min with the different extracts tested. Conclusions:These results suggest that the leaf and seed extracts of C.siamea.N.nucifera.P. amarus.P.nigrum and T.ammi have the potential to be used as an ideal ecofriendly approach for the control of the An.stephensi and Cx.quinquefasciatus. | Chinnaperumal Kamaraj Abdul Abdul Rahuman Asokan Bagavan Gandhi Elango Abdul Abduz Zahir Thirunavukkarasu Santhoshkumar | 2011 | Asian Pacific Journal of Tropical Medicine2011，4，9： | 5 |
| 5 | Hydrodynamic Coefficients for a 3-D Uniform Flexible Barge UsingWeakly Compressible Smoothed Particle Hydrodynamics显示文摘The numerical modelling of the interactions between water waves and floating structures is significant for different areas of the marine sector, especially seakeeping and prediction of wave-induced loads. Seakeeping analysis involving severe flow fluctuations is still quite challenging even for the conventional RANS method. Particle method has been viewed as alternative for such analysis especially those involving deformable boundary, wave breaking and fluid fragmentation around hull shapes. In this paper, the weakly compressible smoothed particle hydrodynamics(WCSPH), a fully Lagrangian particle method, is applied to simulate the symmetric radiation problem for a stationary barge treated as a flexible body. This is carried out by imposing prescribed forced simple harmonic oscillations in heave, pitch and the two-and three-node distortion modes. The resultant,radiation force predictions, namely added mass and fluid damping coefficients, are compared with results from 3-D potential flow boundary element method and 3-D RANS CFD predictions, in order to verify the adopted modelling techniques for WCSPH.WCSPH were found to be in agreement with most results and could predict the fluid actions equally well in most cases. | Muhammad Zahir Ramli P.Temarel M.Tan | 2018 | Journal of Marine Science and Application2018，17，3： | 4 |
| 6 | 屏蔽式总温探针流动与换热分析显示文摘采用定常/非定常数值模拟方法研究了某屏蔽式总温探针的流动与换热特点,讨论了来流马赫数、进出口面积比对其稳态误差的影响,给出了不同条件下屏蔽式总温探针稳态误差的变化规律。结果表明,在来流马赫数0.5条件下,与仅考虑对流换热相比,导热与辐射使屏蔽罩表面最高温度降低约19K;气流在屏蔽室的头部和中部区域形成两个主要的涡区,其中中部的肾型涡尺度最大,是屏蔽室里的主控涡;在高来流马赫数条件下,速度误差和导热误差对进出口面积比的变化非常敏感,总误差随进出口面积比的增大而迅速增大;对于本文研究的探针,在Ma=0.6时,出口半径从1.5mm减小至0.5mm,探针总稳态误差将增大超过12K。 | 张伟昊 杨伟平 曹保武 Zahir Ummer 邹正平 | 2018 | 航空科学技术2018，29，7： | 4 |
| 7 | Sugar beet yield and industrial sugar contents improved by potassium fertilization under scarce and adequate moisture conditions显示文摘Sugar beet(Beta vulgaris L.) is an industrial crop, grown worldwide for sugar production. In Pakistan, sugar is mostly extracted from sugarcane, soil and environmental conditions are equally favorable for sugar beet cultivation. Beet sugar contents are higher than sugarcane sugar contents, which can be further increased by potassium(K) fertilization. Total K concentration is higher in Pakistani soils developed from mica minerals, but it does not represent plant available K for sustainable plant growth. A pot experiment was conducted in the wire-house of Institute of Soil and Environmental Sciences at University of Agriculture Faisalabad, Pakistan. K treatments were the following: no K(K_0), K application at 148 kg ha^(–1)(K_1) and 296 kg ha^(–1)(K_2). Irrigation levels were used as water sufficient at 60% water holding capacity and water deficient at 40% water holding capacity. The growth, yield and beet quality data were analyzed statistically using LSD. The results revealed that increase in the level of K fertilization at water sufficient level significantly increased plant growth, beet yield and industrial beet sugar content. The response of K fertilization under water deficient condition was also similar, however overall sugar production was less than that in water sufficient conditions. It is concluded from this study that K application could be used not only to enhance plant growth and beet yield but also enhance beet sugar content both under water-deficient as well as water-sufficient conditions. | Muhammad Umair Mubarak Muhammad Zahir Sagheer Ahmad Abdul Wakeel | 2016 | Journal of Integrative Agriculture2016，15，11： | 4 |
| 8 | Characterization and of Ralstonia TAL-Like DNA-Binding Specificities Effectors显示文摘从 Xanthomonas sp 的抄写像使活跃之物的受动器(故事) 。为染色体工程应用被用作可定制的 DNA 有约束力的模块。Ralstonia solanacearum 像故事的蛋白质(RTL ) 展出类似的结构的特征到故事,包括一个中央 DNA 有约束力的领域填写了 of35 氨基的酸长的重复。这里,我们描绘他们作为 transcriptional 使活跃之物在植物房间原子核, mediateDNA 绑定,和力量功能本地化的 RTL 和表演。RTL 有唯一的 DNA 有约束力的体系结构并且是 enrichedin 重复变量 di 残余(RVD ) ,它决定重复 DNA 有约束力的特性。我们决定了 DNA 有约束力的 specificitiesfor RVD 序列 ND, HN, NP,和 NT。RVD ND 调停和 C 核苷酸的高度特定的相互作用, HN interactsspecifically 与 A 和 G 核苷酸,和 NP 绑在 C, A,和 G 核苷酸。而且,我们发展了一高度为设计 RTL 受动器的 efficientrepeat 集会途径。一起拿,我们的数据证明 RTL 是是要定制为指向的 genomic 和 epigenomicmodifications 绑在选择用户的 DNA 序列的优秀选择的唯一的 DNA-targetingmodules。这些调查结果将在 pathogenicityof Ralstonia spp.Key 词有关 RTL 分子的生物学和 RTL 角色便于研究: | Lixin Li Ahmed Atef Agnieszka Piatek Zahir Ali Marek Piatek Mustapha Aouida Altanbadralt Sharakuu Ali Mahjoub Guangchao Wang Suhail Khan Nina V. Fedoroff Jian-Kang Zhu Magdy M. Mahfouz | 2013 | Molecular Plant2013，6，4： | 3 |
| 9 | Current approaches to reduce or eliminate mitochondrial DNA mutations显示文摘Mitochondrial DNA(mt DNA)mutations have been implicated in a broad range of disorders which severely affect human health(Wallace,1999).Some drugs have been developed to slow down pathological changes of mitochondrial disorders.However,there is no effective treatment for patients with mt DNA mutations.mt DNA is less protected and has fewer repair mechanisms than nuclear DNA(n DNA).Such a reality results in a much higher | Liang Yang Tingfang Mei Xiaobing Lin Haite Tang Yi Wu Rui Wang Jinglei Liu Zahir Shah Xingguo Liu | 2016 | Science China(Life Sciences)2016，59，5： | 3 |
| 10 | Hepatopancreatoduodenectomy for metastatic duodenal gastrointestinal stromal tumor显示文摘BACKGROUND: Duodenal gastrointestinal stromal tumors, which are rare, comprise 3%-5% of all gastrointestinal stromai tumors. We present a case of a metastatic duodenal gastrointestinal stromal tumor that was successfully treated by simultaneous tight hemihepatectomy and pancreaticoduodenectomy. METHODS: A 50-year-old woman was admitted to our department for the treatment of a possible metastatic duodenal gastrointestinal stromal tumor (GIST). At laparotomy a large duodenal tumor was found displacing the head of the pancreas. A 3 cm in diameter lesion in the posterior aspect of segment Ⅷ of the liver was also noted. Simultaneous right hepatectomy and pancreaticoduodenectomy were performed. RESULTS: Histological examination revealed a high grade metastatic duodenal GIST strongly positive for c-kit, CD34, and vimentin. The patient had no additional therapy. A follow-up of 21 months showed that the patient is very well and there is no evidence of recurrent diseases. CONCLUSIONS: Malignant stromai tumors of the duodenum are rarely encountered. They are usually slow growing, and may be amenable to curative surgery, even after occurrence of metastases. Resection of localized liver metastasis is still advocated when feasible, since imatinib does not provide a complete or long-term response. Combined surgical resection is an efficacious treatment for patients with metastatic duodenal gastrointestinal stromal tumor. | Charalabos Stratopoulos Zahir Soonawalla Juan Piris Peter J Friend | 2006 | Hepatobiliary & Pancreatic Diseases International2006，5，1： | 3 |
| 11 | Larvicidal potential of medicinal plant extracts against Anopheles subpictus Grassi and Culex tritaeniorhynchus Giles (Diptera: Culicidae)显示文摘 | C. Kamaraj A. Bagavan A. Abdul Rahuman A. Abduz Zahir G. Elango G. Pandiyan | 2009 | Parasitology Research2009，，5： | 3 |
| 12 | GSH和维生素E对镉毒性的影响显示文摘目的 探讨GSH和维生素E对镉毒性的影响。方法 给 4组Syrian仓鼠皮下注射 0、 35、 6 0和 70 μmol/kg体质量CdCl2 ,另 2组仓鼠用GSH和维生素E预处理后再投与 70 μmol/kgCdCl2 ,染镉后 2 4小时观察血清LDH、ALT ,尿LDH和尿蛋白 ,肝脏和肾皮质镉含量以及肝脏和肾皮质GSH含量的变化。结果 随着染镉剂量的增加 ,血清LDH和ALT活性有升高趋势 ,70 μmol/kg组仓鼠血清LDH和ALT活性明显高于对照组 ;尿LDH活性和尿蛋白含量各染镉组与对照组之间无明显差异 ;各染镉组仓鼠肝和肾皮质镉浓度随染镉剂量增加而升高 ,肾皮质GSH含量均明显高于对照组 ,而肝脏GSH含量与对照组之间无明显差异。给仓鼠GSH和维生素E预处理后仓鼠血清LDH和ALT活性明显低于单纯染镉组 ;肝和肾皮质GSH含量低于单纯染镉组 ;维生素E预处理组仓鼠肾皮质镉浓度也低于单纯染镉组。结论 急性染镉主要引起仓鼠肝脏损害 ,GSH和维生素E预处理可以拮抗镉的肝脏毒性 ,此种保护作用不是由于GSH含量的改变 ,推测可能与它们的抗氧化和稳定生物膜的特性有关。 | 徐兆发 Zahir A Shaikh | 2001 | 中国工业医学杂志2001，14，6： | 3 |
| 13 | Fast inversion algorithm for identification of elastoplastic properties of power hardening materials from limited spherical indentation tests显示文摘 | Alemdar Hasanov Zahir Muradoglu | 2011 | International Journal of Non-Linear Mechanics2011，，5： | 2 |
| 14 | Electron doping induced semiconductor to metal transitions in ZrSe2 layers via copper atomic intercalation显示文摘 | Zahir Muhammad Kejun Mu Haifeng Lv Chuanqiang Wu Zia ur Rehman Muhammad Habib Zhe Sun Xiaojun Wu Li Song | 2018 | Nano Research2018，11，9： | 2 |
| 15 | Recent Advances on Graphene Quantum Dots for Electrochemical Energy Storage Devices显示文摘Graphene quantum dots(GQDs)which are nanofragments of graphene with an average size between 2 and 50 nm have attracted much attention due to their outstanding properties such as high conductivity,high surface area,and good solubility in various solvents.GQDs combine the quantum confinement and edges effects and the properties of graphene.Therefore,GQDs offers a broad range of applications in various fields(medicine,energy conversion,and energy storage devices).This review will present the recent research based on the introduction of GQDs in batteries,supercapacitors,and microsupercapacitors as electrodes materials or mixed with an active material as an auxiliary agent.Tables,discussed on selected examples,summarize the electrochemical performances and finally,challenges and perspectives are recalled for the subsequent optimization strategy of electrode materials.This review is expected to appeal a broad interest on functional GQDs materials and promote the further development of high-performance energy storage device. | Noura Zahir Pierre Magri Wen Luo Jean Jacques Gaumet Philippe Pierrat | 2022 | Energy & Environmental Materials2022，5，1： | 2 |
| 16 | Laboratory study on larvicidal activity of indigenous plant extracts against Anopheles subpictus and Culex tritaeniorhynchus显示文摘 | G. Elango A. Abdul Rahuman A. Bagavan C. Kamaraj A. Abduz Zahir C. Venkatesan | 2009 | Parasitology Research2009，，6： | 2 |
| 17 | Variable-fidelity optimization with design space reduction显示文摘Advanced engineering systems, like aircraft, are defined by tens or even hundreds of design variables. Building an accurate surrogate model for use in such high-dimensional optimization problems is a difficult task owing to the curse of dimensionality. This paper presents a new algorithm to reduce the size of a design space to a smaller region of interest allowing a more accurate surrogate model to be generated. The framework requires a set of models of different physical or numerical fidelities. The low-fidelity (LF) model provides physics-based approximation of the high-fidelity (HF) model at a fraction of the computational cost. It is also instrumental in identifying the small region of interest in the design space that encloses the high-fidelity optimum. A surrogate model is then constructed to match the low-fidelity model to the high-fidelity model in the identified region of interest. The optimization process is managed by an update strategy to prevent convergence to false optima. The algorithm is applied on mathematical problems and a two-dimen-sional aerodynamic shape optimization problem in a variable-fidelity context. Results obtained are in excellent agreement with high-fidelity results, even with lower-fidelity flow solvers, while showing up to 39% time savings. | Mohammad Kashif Zahir Gao Zhenghong | 2013 | Chinese Journal of Aeronautics2013，26，4： | 2 |
| 18 | Efficacy of larvicidal botanical extracts against Culex quinquefasciatus Say (Diptera: Culicidae)显示文摘 | A. A. Rahuman A. Bagavan C. Kamaraj E. Saravanan A. A. Zahir G. Elango | 2009 | Parasitology Research2009，，6： | 2 |
| 19 | Spin valve effect of NiFe/graphene/NiFe junctions显示文摘当旋转从一种转变金属铁磁物质通过 graphene 层被注射时,高旋转极化能被完成。当由另一种铁磁物质检测了时,极化纺纱的电流在一个 ferromagnet/graphene/ferromagnet 连接造成高抵抗、低抵抗的状态。这里,我们在包括用化学蒸汽免职种的双层或单个层的 graphene 做的 NiFe 电极和夹层的连接向 10 K 从房间温度汇报明白旋转阀门效果。我们发现了旋转阀门效果比与单个层的 graphene 与双层 graphene 是更强壮的。在在在在为双层 graphene 的 10 K 的到 0.48% 的房间温度的为单个层的 graphene 并且从 0.27% 的 10 K 的到 0.14% 的房间温度的从 0.09% 的相对磁致电阻增加的比率。旋转阀门效果被察觉在垂直方向保留极化纺纱的运输,磁致电阻的 hysteretic 性质提供一台记忆设备的基本功能。当温度被降低,我们也发现了连接电阻 monotonically 减少并且当前电压的特征表演线性行为。这些结果表明 graphene 夹层不作为一个隧道障碍,但是相当作为进行工作在二个 NiFe 电极之间的薄电影。 | Muhammad Zahir Iqbal Muhammad Waqas Iqbal Jae Hong Lee Yong Seung Kim Seung-Hyun Chun Jonghwa Eom | 2013 | Nano Research2013，6，5： | 2 |
| 20 | Biosynthesis of titanium dioxide nanoparticles using bacterium Bacillus subtilis显示文摘 | A.Vishnu Kirthi A. Abdul Rahuman G. Rajakumar S. Marimuthu T. Santhoshkumar C. Jayaseelan G. Elango A. Abduz Zahir C. Kamaraj A. Bagavan | 2011 | Materials Letters2011，，17： | 2 |
您所在的机构暂未开通此部分的功能，请联系管理员