ultrasonic-assisted method was applied for preparation of cu+2-doped zns nanoparticles (mole fractions of cu+2 ions are 0.000, 0.015, 0.030 and 0.060) in water as a template-free and green method at 30 min. the prepared nanoparticles were investigated by powder x-ray diffraction (xrd), scanning electron microscopy (sem), energy dispersive x-ray (edx) and uv–vis diffuse reflectance spectra (drs)...

Background & Aims of the Study: Phenolic compounds have been extensively used in industries for applications such as petrochemical, oil refineries, papers, plastics, steel, pharmaceuticals, textiles, coal conversion, and so on. Specified amounts of Phenolic compounds are lost in the process of their manufacturing and utilization and often cause environmental pollution problems....

Degradation of engineering systems is a phenomenon that affects the reliability and lifetime systems. Maintenance deteriorating has been widely studied over past 50 years. Numerous maintenance models have proposed in literature to manage degradation. In this paper, we focus on condition-based strategy for those suffering continuous deterioration process. We propose use non-constant threshold de...

background: methyl tert -butyl ether (mtbe) has been commercially used as an octane enhancer to replace tetraethyl lead in gasoline since 1979. the high mobility, water solubility, and resistance to natural attenuation associated with mtbe may re­sult in contamination of ground and surface waters. in this investigation the degradation of aqueous mtbe at relatively high concentrations was studie...

In present study the photocatalytic degradation of commercial azo dye Direct Red 5B (DR5B dye) has been carried out in presence of recently developed photocatalyst: methylene Blue immobilized resin Dowex-11, under visible light. The effect of process parameters such as variation of the dye concentration, pH, light intensity and amount of catalyst loading on the reaction rate has been studied .T...

application of phosphorus (p) fertilizers as solid or liquid fertilizers to soils leads to re-actions of orthophosphate ions with various soil components which remove p from the so-lution phase and convert it to less soluble phosphates. this study was aimed at determin-ing soil properties that affect the rate of phosphate retention in 28 contrasting calcareous soils from different geographical ...

Nano-composite copper-zinc oxide (NCCZO) was deposited on borosilicate glass using a novel sol-gel/doctor-blade technique. The photocatalyst was prepared from copper acetylacetonate, zinc acetylacetonate, monoethanolamine (MEA) and citric acid monohydrate at 75 oC, aged for 1 d and annealed at 650 oC. The properties of the NCCZO nano-composite were investigated by X-ray diffraction (XRD) and fi...

in this work, mg-doped zno nanostructures were prepared in water under ultrasonic irradiation for 60 min without using any organic compounds or post preparation treatments. the prepared samples were characterized by x-ray diffraction (xrd), scanning electron microscopy (sem), transmission electron microscopy (tem), energy dispersive analysis of x-ray (edx), diffuse reflectance spectroscopy (drs...

1. The protein degradation rate of human skeletal muscle was evaluated in vitro in isolated fibre bundles from the rectus abdominus muscle by measuring the tyrosine released from muscle tissue proteins. Protein metabolism in this semi-intact preparation was compared with that of the intact extensor digitorum longus muscles from rats under the same experimental conditions. 2. Protein balance was...