Grade 630 martensitic precipitation hardening stainless steel has a combination of high hardness and strength after suitable heat treatment. The great advantage this grade is that they are usually supplied in the condition treated with solution then aged to achieve sufficient strength. Chosen for research work, AISI samples were subjected salt bath nitriding process. Three chosen shape tapered ...

Drawing lessons from the development of cities at home and abroad success and lost experience, through practice research, this paper systemically analysis the evolution of urban economy space. In the scope of global industrial supply chain’s recomposing, it is discusses that modern city’s function structure characteristic, focusing “integrative logistics management service”. According to Dalian...

As traditional competition becomes global, businesses fail to take, on their own, the measures that are required to become more competitive. Hence, in a globally competitive environment, national improvement and competitiveness have also become vital. Businesses must utilize and be supported by the international competitiveness of their nations. This study aims to analyze the competitiveness of...

Crude extract of Rubia cordifolia (RC) was tested in isolated tissue preparations for its possible calcium channel antagonistic activity. RC suppressed the spontaneous contractions of guinea-pig atria, rabbit jejunum and rat uterus in a concentration dependent manner (0.1-3 mg/ml). In rabbit aorta, it inhibited norepinephrine (10 microM) and KCl (80 mM) induced contractions. Replacement of phys...

Cadmium compounds such as cadmium sulfate are used in batteries, pigments and in semiconductor industry. Commercially available cadmium sulfate was purchased and used for the crystal growth. The sample in salt form was dissolved in double distilled water and the saturated solution was prepared. Nearly 38 grams/50 ml are necessary to prepare the saturated solution and the solution was stirred we...

The dissipative quantum dynamics of an anharmonic oscillator coupled to a bath is studied with the purpose of elucidating the differences between the relaxation to a spin bath and to a harmonic bath. Converged results are obtained for the spin bath by the surrogate Hamiltonian approach. This method is based on constructing a system-bath Hamiltonian, with a finite but large number of spin bath m...

in hot dip galvanizing, several parameters such as chemical composition of coating bath, immersion time and surface roughness of specimens could affect microstructure and properties of coating. in this article, the effect of aluminum content, immersion time and surface roughness on structure and properties of alloy layers have been investigated. specimens of low carbon silicon-free steel with d...

Bioprospecting, defined as the systematic search for valuable, molecules, genes and organisms in nature, has the potential to offer island countries a means to use biodiversity without disrupting nature; to add value to their natural resources; to ensure that such resources are protected and used in a sustainable manner; and to build the necessary skills to apply biotechnology in improving qual...