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This paper describes the construction of silver particles-impregnated carbon paste electrode (Ag-CPE). The new electrode revealed an interesting determination of paraquat (II). The latter was accumulated on the modified electrode surface by adsorption onto silver particles and was reduced in 0.1molL−1 of Na2SO4 electrolyte at −0.70V and −1.0V for peaks 1 and 2, respectively. Experimental conditions...
Capparis spinosa, a wild plant of the family Capparidaceae, is said to be native to the Mediterranean basin and found in many parts. This shrub can grow very well on dry heat and under intense sunlight and can tolerate low temperature. Caper berries from different locations of contrasting habitats were evaluated for their antioxidant capacities using several methods, including reduction of ferrictripiridyltriazine...
An optimized and validated spectrophotometric method has been developed for the determination of Pd(II) in synthetic mixture and automobile workshop area samples. The method was based on the complex formation of Pd(II) with cefixime in methanol-distilled water medium in the presence of Na2HPO4-citric acid buffer solution of pH 2.6 at room temperature. The complex showed the maximum absorption wavelength...
In this article, the generalized and improved (G′/G)-expansion method has been proposed for further extension to generate many new travelling wave solutions. In addition, nonlinear ordinary differential equation is implemented as auxiliary equation including many parameters instead of linear ordinary differential equation. Moreover, the presentation of the travelling wave solutions is quiet new. The...
A simple, rapid and selective high performance thin layer chromatography (HPTLC) method was developed for the simultaneous determination of cinnarizine (CNZ) and dimenhydrinate (DMH) in pure form and in their combined dosage form. Reviewing the literature revealed that there are no reports for the use of TLC for the assay of this mixture. Effective separation was achieved using Fluka HPTLC aluminum...
This study assesses the hydrocarbon source rocks of the Belayim oilfields, central Gulf of Suez, Egypt. Detailed geochemical methods, including liquid chromatography, gas chromatography and gas chromatography–mass spectrometry, are used to characterize organic-rich facies of the Turonian–Eocene deposits. Crude oil samples are analyzed using C7 and stable carbon isotopes, in addition to analysis of...
A method for solving three types of nonlinear evolution equations namely KdV, modified KdV and Burgers equations, with self-similar solutions is presented. The method employs ideas from symmetry reduction to space and time variables and similarity reductions for nonlinear evolution equations are performed. The obtained self-similar solutions of KdV and mKdV equations are related to Bessel and Airy...
Information density and switching of magnetization offers an interesting physical phenomenon which invoke magneto-optical techniques employed on the magnetic medium. In this paper, we explore the soliton assisted magnetization reversal in the nanosecond regime in the theoretical framework of the Landau–Lifshitz–Maxwell (LLM) model. Starting from the Landau–Lifshitz equation, we employ the reductive...
A new mathematical model of the equations of two-temperature magneto-thermoelasticity theory for a perfect conducting solid has been constructed in the context of a new consideration of heat conduction with a time-fractional derivative of order α (0<α ⩽1) and a time-fractional integral of order υ (0<υ⩽2). This model is applied to one-dimensional problem for a perfect conducting half-space of...
A new, simple, accurate and rapid spectrophotometric method was developed for the quality control of febantel (FBT), in pure and dosage forms. The method was based on the utility of π-acceptors such as 3,6-dichloro-2,5-dihydroxy-p-benzoquinone (CAA) or 2,3-dichloro-5,6-dicyano-p-benzoquinone (DDQ) for the determination of FBT which act as an e-donor to form a highly colored complex with absorption...
In this article, the modified extended tanh-function method is employed to solve fractional partial differential equations in the sense of the modified Riemann–Liouville derivative. Based on a nonlinear fractional complex transformation, certain fractional partial differential equations can be turned into nonlinear ordinary differential equations of integer orders. For illustrating the validity of...
Two simple and selective visible spectrophotometric methods were developed for assay of bifonazole in pure drug and in its pharmaceutical formulation. The developed methods were based on the charge transfer complexation reaction of bifonazole with 2,5-dichloro-3,6-dihydroxy-1,4-benzoquinone (CAA) for method A and 2,3-dichloro-5,6-dicyano-1,4-benzoquinone (DDQ) for method B, resulting in the formation...
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