The effect of excess point defects on the equilibrium concentration interstitial oxygen for system oxygen/SiO2 precipitates in crystalline Si is theoretically investigated. expression modified by derived. Excess vacancies are found to decrease this concentration, while self-interstitials have opposite effect. effects different conditions defect generation studied.

Isotope-exchange rates at chemical equilibrium were determined for the glycogen-a-D-glucopyranose l-phosphatePi system in the presence of phosphorylase a. Exchange of 32P from a-n-glucopyranose l-phosphate (glucose-l-P) into Pi and exchange of 14C from glucose-l-P into glycogen were followed simultaneously by the use of glucose-l-P containing both isotopes. Concentrations of glucose-l-P and Pi ...

Surfactant-dye interactions are very important in chemical and dyeing processes. The dyes interact strongly with surfactant and show new spectrophotometric properties, so the UV-vis absorption spectrophotometric method has been used to study this process and extract some thermodynamic parameters. In this work, the association equilibrium between ionic dyes and ionic surfactant were studied by a...

Background: This study aimed to investigate the biosorption of pentachlorophenol on Aspergillus niger biomass as a method for removal of pentachlorophenol from aqueous solutions. Methods: Modified A. niger biomass with NaOH was used to absorb the pentachlorophenol. The impacts of various experimental parameters like primary pentachlorophenol concentration, pH of the solution, contact time, a...

A rigorous physical‐mathematical model for predicting the charge states of both mono‐ and multivalent defects with arbitrary concentrations in Si thermal equilibrium non‐equilibrium steady‐state conditions is presented. The avoids assumption that defect concentration much lower than doping level, which common previous approaches. It shown general occupancy ratio given by α = ( kn 1 + p )/( ) st...