Abi Legesse* and Addis Ababa
This research was carried out to investigate the physicochemical parameters of livestock drinking water samples collected from Falfal, Degehabur and Bulale areas in Somali regional state of Ethiopia. The objective of this research was to analyze the physicochemical parameters of water ponds used for livestock drink. The result was recorded that, the pH, Temperature, Total Dissolved Solid and Total hardness was 7.17°C ± 0.03°C, 22.51°C ± 0.18°C, 17.50 ± 2.60 mg/L and 825.22 ± 92.18 mg/L, respectively. The mean concentration of Chloride ion, Magnesium ion and calcium ion was 422.09 ± 64.05 mg/L, 61.37 ± 6.56 mg/L, and 200.70 13.23 mg/L, respectively. The mean Chemical Oxygen Demand and Biological Oxygen Demand were also recorded which was 12.67 0.54 mg/L and 7.47 0.67 mg/L, respectively.
The obtained results were also compared to the national and international standards to determine the quality of livestock drinking water. Accordingly, the measured pH was in agreement with World health organization and Ethiopian standards agency standards, which was 6.5 to 8.5. The Temperature, Total hardness and chloride ion concentration was above the standard limit set by World health organization and Ethiopian standards agency. The concentration of Total Dissolved Solid, Mg2+ and Ca2+ was in agreement with World health organization and Ethiopian standards agency standards. The standards for Chemical Oxygen Demand and Biological Oxygen Demand were not available both from World health organization and Ethiopian standards agency.
A study on electrochemical deposition in a triple-component CoNiFe system from a chloride electrolyte solution with equal concentrations of Co, Ni, and Fe was performed. The concentrations used were 0.48; 0.083; 0.00625 mol/l, and the temperature was 70°Ð¡. The relative content of the components in the film approached the composition of the electrolyte, though the concentration of each component was slightly decreased. The dependence of the composition of films on the current density is explained by concentration polarization.
Abdunnaser Mohamed Etorki, Ezzedein Mohamed Aboushloa*
Nanometer-sized titanium dioxide prepared in the Lab chemically modified with 8-hydroxyquinolin and used for selective solid phase extraction processes, separation and preconcentration process of aluminum (III) from aqueous solutions prior to its determination by Inductively Coupled Plasma optical emission-Mass spectrometry(ICP-MS) and Graphite furnace atomic Absorption Spectrometry(GFAAS). The optimal conditions for the proposed solid phase extraction (SPE: 0,1g of TiO2- modified oxine, 6h shaking time,
pH 6.5). The experimental results was fitted well to Langmuir isotherm equation to determine the maximum adsorption capacity.The static maximum adsorption capacity was 69.013mg/g. The lowest concentration of aluminum (Al+3) was (30.0μg/L) and the highest concentration was (14585μg/L). The method was successfully applied to the determination of trace of aluminum in areas near to the factories in
east of Tripoli.
Venu Sangal *
In this paper the influence of solvent dielectric constant on the rate of oxidation of p-methoxybenzaldehyde and pmethylbenzaldehyde with t-BuOCl has been studied in various solvent mixtures of acetic acid and water. The results indicate that in the oxidation of p-methoxybenzaldehyde with t-BuOCl the rate increases with increase in the percentage of acetic acid (from 10% to 40%), but the rate decreases with further increace in acetic acid content (50-80% HOAc). In the oxidation of p-methylbenzaldehyde with t- BuOCl the rate is maximum at 50% HOAc and decreases on either side of this percentage.
Peter Kenny
Karim Eyubov
The amount, rate of formation and radiation-chemical yields of molecular hydrogen obtained from the process of radiolysis under the influence of gamma quanta (60Co, P=9.276 rad/s, T=300 K) in the nano-SiO2/H2O system with a mass of particle of m=0.2 g and size of silicon particle of d=20÷60 nm by changing of water mass (m=0.01÷0.8 g) were studied. It was found that the rate of formation and radiationchemical yield of molecular hydrogen determined by increasing the mass of water • decrease by 10 times for water, • increase by 8 times for nano-silicon dioxide, • for common system, increase at the values of water mass of 0.01 gm H2O 0.2 g, have the maximum at mH2O =0.2 g and decrease at 0.2 g< mH2O 0.8 g.
DOI: 10.37421/2150-3494.2022.13.314
Effect of metallic deposited nanoparticles on screen printed carbon with tetrathiafulvalene incorporated ink, was tested by three electrochemical procedures. First one electrodeposition at constant potential and two cyclic voltammetry procedures that applied changes in step potential, scan rate and delay time. X-rays Fluorescence (XRF), Scanning Electronic and Atomic Force Microscopy (SEM) and (AFM) respectively were performed and metallic nanoparticles deposits were characterized through their SEM images. XRF provide metal percentage deposited by electrochemical procedures. AFM parameters let to know electrodes modi ied surface characteristics. Nanoparticles electrochemically deposited electrodes were modi ied with superoxide dismutase enzyme and tested on epinephrine biosensor amperometric calibration curves. Platinum Nanoparticles (PtNPs) modi ied electrodes nature surpasses AFM surface parameters. There is correlation between low AFM parameters and high slope epinephrine calibration curve excepting PtNPs case. Nanoparticles of platinum deposited by cyclic voltammetry procedure 1 showed higher epinephrine slope calibration curve than the others nanoparticles deposited by constant potential and cyclic voltammetry procedure. Higher linearity and stability was showed for PtNPs performed cyclic voltametry procedure; this one was selected to validation of biosensor. Developed biosensor showed reproducibility of 2.9% and detection limit of 22.8 μm. Biosensor analysis of epinephrine pharmaceutical injection was 103.1% with RSD 5.4%.
Chemical Sciences Journal received 912 citations as per Google Scholar report
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