hossnia_saber

Hossnia Saber Mohran

Professor - Professor

Faculty of science

Address: Chemistry Department Faculty of Science Sohag University

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Hydrogen evolution reaction on Sn, In, and Sn–In alloys in carboxylic acids

2009 | Keywords Potentiodynamic, Alloys, Hydrogen evolution,
Hydrogen evolution reaction on Sn, In, and Sn–In alloys in carboxylic acids
The cathodic behavior of tin, indium, and tin–indium alloys in 0.5-M solutions of oxalic, malic, and citric acids has been investigated using potentiodynamic techniques at temperature range of 30–60 °C. The results showed that the corrosion rate (_I_corr) is higher at lower indium percent (0.5% In) and starts to decrease gradually as increase of the In percent up to 5% ... Read more

Kinetics and Mechanism of the Decay of Methyl Cellulose-Manganate(VI) Polysaccharide Transient Species–Novel Spectrophotometric Kinetic Trace of Methyl Cellulose Hypomangate(V) Gel Intermediate Polysaccharide

2007 | Keywords polysaccharide, decay, hypomanganate, methyl cellulose, mechanism,
Kinetics and Mechanism of the Decay of Methyl Cellulose-Manganate(VI) Polysaccharide Transient Species–Novel Spectrophotometric Kinetic Trace of Methyl Cellulose Hypomangate(V) Gel Intermediate Polysaccharide
Kinetics of the decay of methyl cellulosemanganate(VI) intermediate polysaccharide [MC-MnO4 22] have been followed spectrophotometrically in different strong basic solutions at different temperatures, as well as, in the presence of different concentrations of perchlorate salt. The reaction is base-catalyzed. Salt never affects the reactivity. The activation parameters have been evaluated and discussed in connection with the proposal mechanism Read more

ChargeTElectrochemical Characteristics of Some Purpurins in Aqueous and Nonaqueous Solutions

2005 | Keywords nonaqueous solutions, purpurins in aqueous, Electrochemical Characteristic,
ChargeTElectrochemical Characteristics of Some Purpurins in Aqueous and Nonaqueous Solutions
The electrochemical impedance technique (EIS) and the cyclic voltammetric method (CV) were used to investigate the behavior of purpurin (P), anthrapurpurin (AP) and benzopurpurin (BP) in aqueous and in N,N- dimethylformamide (DMF) media. In the CV experiments, both the radical and the dianion of these substances were assumed to form of limited stability due to chemical protonation. In case of ... Read more

Cyclic Volta Metric Study of Alizarin Yellow R and Some Analogous Arylazo Compounds in DMF and in Aqueous Media

2005 | Keywords Cyclic voltammetry, Electrochemical behavior, analogous arylazo, azo compounds, aliz arin yellow R, ,
Cyclic Volta Metric Study of Alizarin Yellow R and Some Analogous Arylazo Compounds in DMF and in Aqueous Media
The Cyclic Voltammetry (CV) was used to investigate the electrochemical behavior ofalizarin yellow R and some analogous arylazo compounds having almost the same central azo group. For this purpose, the substances chosen for the measurements are Alizarin Yellow R (AYR), Eriochrome Black T (EBT) and Sudan II (SUD II). The investigations were carried out at room temperature (298 K) in ... Read more