In this work, superconducting samples of type (Bi<sub>1.8</sub>Pb<sub>0.4</sub>)Sr<sub>1.9</sub>Ca<sub>2.1</sub>Cu<sub>3</sub>O<sub>10+δ</sub> were prepared, with Pb<sub>0.4</sub> composed of Pb<sub>0.2</sub><sup> 2+</sup> and Pb<sub>0.2</sub><sup>4+</sup> , at different sintering temperatures ranging from 835℃to 855℃. The prepared samples were characterized using x-ray powder diffraction (XRD), scanning electron microscope (SEM), electron dispersive spectroscopy (EDS) and differential scanning calorimetery (DSC). The superconducting properties were investigated using electrical resistivity and transport critical current density. Our results showed that the sample prepared at sintering temperature 845?C has the optimum value of superconducting transition temperature T<sub>c</sub> and transport critical current density J<sub>c</sub>
The potential of glycine max pod (GMP) in removal of Cd 2+ , Ni 2+ and Cr 6+ ions from aqueous solutions was examined in a batch adsorption process with respect to several experimental conditions including pH of solution, contact time, GMP dosage, initial metal ions concentration, and temperature, etc. The characterization of GMP was performed by using FTIR and SEM techniques. The maximum uptake of Cd 2+ (1.445 mg/g), Ni 2+ (1.585 mg/g) and Cr 6+ (1.594 mg/g) was observed when used 2.0g of GMP biomass, 25 mgL -1 of initial Cd 2+ , 50 mg/l of initial Ni 2+ and 50 mg/l of initial Cr +6 concentration at pH 5, 6 and 3 and contact time of 90, 60 and 90 min at room temperature for Cd 2+ , Ni 2+ and Cr 6+ respectively. The experimental data were analyzed by the Langmuir, Freundlich, Temkin and Dubinin-Radushkevich (D-R) isotherm models. The monolayer adsorption capacity Of GMP was found to be 21.56 mg/g, 53.76 mg/g and 18.87 mg/g for Cd 2+ , Ni 2+ and Cr 6+ ions, respectively. The kinetics of the adsorption was tested using pseudofirst-order, pseudo-second-order, Elovich and intra-particle diffusion models. The results showed that the adsorption of Cd 2+ , Ni 2+ and Cr 6+ ions onto GMP proceeds according to the pseudo-second-order model.
Saussurea lappa is belong to the family Astreaceae. It has been cultivated in various parts of the world a commonly known and potent plant which is well studied for its medicinal uses in diverse indigenous Indian systems of medicine. It is usually known as kuth root or costus and used in different system of medicine to treat various diseases such as asthma, ulcers and stomach problems. Indian medical systems use various preparations prepared from the roots by physicians to treat cough, cold, stomachache, toothache, typhoid and fever. It is an important drug for gout and erythroderma and stimulates spermatogenesis. Several of its activities are proved and confirmed through in viro and in vivo approaches which gave a rational scientific way to the traditional claims. As a result to the significant proven activities Saussrea lappa is having major chance for new drug discovery.
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