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254篇 您的检索式:作者名="Chaker"
    题名 作者 年代 出处 被引量
1Synthesis of novel adsorbent by intercalation of biopolymer in LDH for the removal of arsenic from synthetic and natural water显示文摘This study focuses on the synthesis of nanocomposites named CCA and CZA that were prepared by the incorporation of cellulose(CL)in the Ca/Al and Zn/Al layered double hydroxide(LDH),respectively.These materials were then used for the uptake of As(Ⅲ)and As(V)from aqueous medium.Characterization of both nanocomposites(CCA and CZA)was done using FTIR and Raman analysis to identify the functional groups,N2 adsorption-desorption isotherms to determine the specific surface area and pore geometry and XPS analysis to obtain the surface atomic composition.Some other characters were investigated using simultaneous TGA and DTA and elemental chemical analysis(CHNS/O).The crystallinity of the prepared nanocomposites was displayed by XRD patterns.Furthermore,the sheet-like structure of the LDHs and the irregularity of surface morphology with porous structure were observed by TEM and SEM microphotographs.Optimization of maximum adsorption capacity was adjusted using different parameters including pH,contact time and adsorbent dosage.The pseudo-second-order model was in good fitting with kinetics results.The adsorption isotherm results showed that CZA exhibits better adsorption capacity for As(Ⅲ)than CCA and the Langmuir isotherm model described the data well for both nanocomposites.Thermodynamic studies illustrated the endothermic nature of CCA and exothermic nature on CZA,as well as the fact that the adsorption process is spontaneous.A real water sample collected from well located in Gabes(Tunisia),has also been treated.The obtained experimental results were confirmed that these sorbents are efficient for the treatment of hazardous toxic species such as.Hanen Bessaies Sidra Iftekhar Bhairavi Doshi Jamel Kheriji Mohamed Chaker Ncibi Varsha Srivastava Mika Sillanpaa Bechir Hamrouni 2020Journal of Environmental Sciences2020,32,5:10
2基于电化学还原氧化石墨烯的电化学DNA生物传感器显示文摘使用还原氧化石墨烯(rGO)制备一种简单、快速和可重复方法构建DNA生物传感器。将带负电的氧化石墨烯(GO)与半胱氨酸上带正电的氨基基团通过静电作用相互吸附,用线性扫描伏安法(LSV)电化学还原电极表面吸附的GO。将二茂铁标记的DNA(Fc-DNA)探针固定到r GO表面,成功构建DNA传感器。传感器的制备过程使用循环伏安法和拉曼光谱表征。通过杂化前后DNA传感器所展现出方波信号峰电流的差异,实现对目标DNA的定量检测。实验结果表明:目标DNA浓度在1. 0×10^(-13)~1. 0×10^(-6)mol/L范围内,峰电流变化与目标DNA浓度呈线性关系,线性相关系数为0. 981,检测限是2. 0×10^(-13)mol/L (S/N=3)。朱济锋 黎学思 周大明 于乐泳 王国东 Chaker Tlili 2019传感器与微系统2019,38,6:5
3Characterization and physicochemical aspects of novel cellulose-based layered double hydroxide nanocomposite for removal of antimony and fluoride from aqueous solution显示文摘A series of novel adsorbents composed of cellulose(CL)with Ca/Al layered double hydroxide(CC_(x)A;where x represent the Ca/Al molar ratio)were prepared for the adsorption of antimony(Sb(V))and fluoride(F^(-))ions from aqueous solutions.The CC_(x)A was characterized by Fourier-transform infrared spectroscopy(FTIR),Brunauer–Emmett–Teller(BET),elemental analysis(CHNS/O),thermogravimetric analysis(TGA-DTA),zeta potential,X-ray photoelectron spectroscopy(XPS)and scanning electron microscopy with energy dispersive Xray spectroscopy(SEM-EDX)analysis.The effects of varying parameters such as dose,pH,contact time,temperature and initial concentration on the adsorption process were investigated.According to the obtained results,the adsorption processes were described by a pseudo-second-order kinetic model.Langmuir adsorption isotherm model provided the best fit for the experimental data and was used to describe isotherm constants.The maximum adsorption capacity was found to be 77.2 and 63.1 mg/g for Sb(V)and F^(-),respectively by CC_(3)A(experimental conditions:pH 5.5,time 60 min,dose 15 mg/10 mL,temperature 298 K).The CC_(3)A nanocomposite was able to reduce the Sb(V)and F^(-)ions concentration in synthetic solution to lower than 6μg/L and 1.5 mg/L,respectively,which are maximum contaminant levels of these elements in drinking water according to WHO guidelines.Hanen Bessaies Sidra Iftekhar Muhammad Bilal Asif Jamel Kheriji Chaker Necibi Mika Sillanpää Bechir Hamrouni 2021Journal of Environmental Sciences2021,33,4:4
4MADCR:Mobility Aware Dynamic Clustering-Based Routing Protocol in Internet of Vehicles显示文摘Internet of Vehicles(IoV)is an evolution of the Internet of Things(IoT)to improve the capabilities of vehicular ad-hoc networks(VANETs)in intelligence transport systems.The network topology in IoV paradigm is highly dynamic.Clustering is one of the promising solutions to maintain the route stability in the dynamic network.However,existing algorithms consume a considerable amount of time in the cluster head(CH)selection process.Thus,this study proposes a mobility aware dynamic clustering-based routing(MADCR)protocol in IoV to maximize the lifespan of networks and reduce the end-to-end delay of vehicles.The MADCR protocol consists of cluster formation and CH selection processes.A cluster is formed on the basis of Euclidean distance.The CH is then chosen using the mayfly optimization algorithm(MOA).The CH subsequently receives vehicle data and forwards such data to the Road Side Unit(RSU).The performance of the MADCR protocol is compared with that ofAnt Colony Optimization(ACO),Comprehensive Learning Particle Swarm Optimization(CLPSO),and Clustering Algorithm for Internet of Vehicles based on Dragonfly Optimizer(CAVDO).The proposed MADCR protocol decreases the end-toend delay by 5–80 ms and increases the packet delivery ratio by 5%–15%.Sankar Sennan Somula Ramasubbareddy Sathiyabhama Balasubramaniyam Anand Nayyar Chaker Abdelaziz Kerrache Muhammad Bilal 2021China Communications2021,18,7:4
5Functionalized CVD monolayer graphene for label-free impedimetric biosensing显示文摘在大区域 graphene 生长的最近的进展在不同区域导致了许多应用。在现在的学习,化学蒸汽扔了(CVD ) 在玻璃底层上支持的单层 graphene 为电气化学的 biosensing 应用作为电极材料被检验。我们由在酸的水的答案在 situ 准备的 carboxyphenyl 重氮基盐的电气化学的减小为 CVD 单层 graphene 的共有原子价 functionalization 报导灵巧的策略。修改 carboxyphenyl 的 graphene 用拉曼光谱学, X 光检查光电子光谱学(XPS ) ,和原子力量被描绘显微镜学(AFM ) ,以及电气化学的阻抗光谱学(EIS ) 。我们也证明 graphene 表面上的 grafted carboxyphenyl 组的数字能被扫描为 electrografting 使用了的周期的 voltammetry (CV ) 的数字控制。我们进一步在 grafted 的激活以后在 graphene 表面上基于 ovalbumin 抗体的固定介绍 immunosensor 的制造和描述经由 EDC/NHS 化学的羧基的组。在使表面不能调动的抗体和 ovalbumin 之间的绑定然后用 Faradaic EIS 被监视在[Fe (CN )< 潜水艇 class= “ a-plus-plus ” > 6 ] 3/4 答案。费用转移抵抗的百分比变化(R < 潜水艇 class= “ a-plus-plus ” > 在绑定以后的 ct ) 为从 1.0 pg 的 ovalbumin 集中展出了线性依赖?Shimaa Eissa Gaston Contreras Jimenez Farzaneh Mahvash Abdeladim Guermoune Chaker Tlili Thomas Szkopek Mohammed Zourob Mohamed Siaj 2015Nano Research2015,8,5:3
6Normal anatomy of the brain: demonstration with gadepentetate dimeglumin in enhanced 3-D MR angiography显示文摘Chakeres DW Schmalbrock P 1991AJR1991,156,:2
7The Meckel cave:computed tomographic study显示文摘KAPIA A CHAKERES D W BLANCOE 1984Radiology1984,152,2:1
8A Review of StrategicEnvironmental Assessment in 12 Selected Countries 显示文摘Chaker A El-Fadl K Chamas L 2006Environmental Impact Assessment Review2006,26,:1
9Fatal scleromyxedema: re- port of a case and review of literature显示文摘Godby A Bergstresser PR Chaker B 1998J Am Acad Dennatol1998,38,2:1
10Direct evaluation of the sp 3 content in diamond-like-carbon films by XPS显示文摘P Mérel M Tabbal M Chaker S Moisa J Margot 1998Applied Surface Science1998,,1:1
11lnfluence of Masonry Infill Panels on the Vibration and Stiffness Characteristics of R/C Frame Buildings 显示文摘Chaker Amar A Cherifati Arslan 1999Earthquake Engineering and Structural Dynamics1999,12,3:1
12AODVjr, AODV simplified 显示文摘Chakeres I D Klein- Berndt L 2002ACM SIGMOBILE Mobile Computing and Communica- tions Review2002,6,3:1
13Simultaneous determination of Cd,Pb,and Cu metal trace concentrations in water certified samples and soil extracts by means of Hg-electroplated-Ir microelectrode array based sensor显示文摘Silva P R M Khakani M A E Chaker M 2001Sensors and Actuators B2001,76,13:1
14Can a one-weekend group therapy reduce fear of blushing? Results of an open trial 显示文摘Chaker S Hofmann SG Hoyer J 2010Anxiety Stress Coping2010,23,3:1
15Inlet fogging of gas turbine engines:experimental and analytical investigations on impaction pin fog nozzle behavior显示文摘CHAKER M A MEHER-HOMJI C B MEE III T 2006Transactions of the ASME2006,128,:1
16Submillimeterresolution MR of the endolymphatie sac in healthy subjects and patients with Meniere disease 显示文摘Sehmalbrock P Dailiana T Chakeres DW 1996AJNR1996,17,9:1
17AODVjr, AODV Simplified 显示文摘CHAKERES ID KLEIN-BERNDT L 2002ACM SIGMOBILE Mobile Computing and Communications Review2002,6,3:1
18Insulin-mediated skeletal muscle vasodilatlon contributes to both insulin sensitivity and responsiveness in lean humans显示文摘Baron A D Steinberg H O Chaker H 1995J Clin Invest1995,96,:1
19Direct evaluation of the sp3 content in diamond-like-carbon films by XPS 显示文摘Mehrel P Tabbal M Chaker M 1998Applied Surface Science1998,136,:1
20Assessing psy- chological flexibility:What does it add above and beyond existing construets显示文摘Gloster AT Klotsche J Chaker S 2011Psychol Assess2011,23,4:1
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