Microstructures, tensile properties and fracture energy of a friction stir spot welded polycarbonate (FSSW) were studied at varying rotational rates and dwelling time. The problem of common FSSW welding is the remaining of characteristic keyhole. This can act as a concentration place in mechanical tests. To order solve this problem authors took advantage of innovation for designing the welding ...

different strains of escherichia coli (e. coli) from human, chickens, and the common strain between human and chickens were isolated and typed with mono-specific antibody. the e. coli strains from each group of human, chicken and common between human and chicken were selected. the polypeptide patterns of selected strains were analyzed and compared with each other by sodium dodecyle sulphate pol...

For precise stress analysis of engineering materials by diffraction methods, the lattice spacing of strain-free materials, d0, must be accurately measured and determined. In this study, a new and easy technique of measuring the specimen is proposed which involves using the original material instead of its powder form for accurate estimation of d0 . The value of d0 obtained by our technique is e...

The kinetics of Na(+)-dependent phosphorylation of the Na(+),K(+)-ATPase by ATP were investigated via the stopped-flow technique using the fluorescent label RH421 (saturating [ATP], [Na(+)], and [Mg(2+)], pH 7.4, and 24 degrees C). The well-established effect of buffer composition on the E(2)-E(1) equilibrium was used as a tool to investigate the effect of the initial enzyme conformation on the...

In this work, we address issues pertinent to the understanding of the structural and electronic properties of Si12xGex alloys, namely, ~i! how does the lattice constant mismatch between bulk Si and bulk Ge manifest itself in the alloy system? and ~ii! what are the relevant strain release mechanisms? To provide answers to these questions, we have carried out an in-depth study of the changes in t...