there is a great interest in developing rapid analytical methods and provide appropriate parametersfor quantitative analysis of compounds derived from refractory pollutants. such methods are important forroutine quality control analysis of an effluent before being discharged into the environment. therefore, a rapid methodology for identification and quantification of some aliphatic acids is pro...

background and objectives: this study aimed to develop and validate a food frequency questionnaire (ffq) for measuring calcium intake in 9-13 years old children in tehran, iran. materials and methods: a 56-item ffq containing main contributors of calcium in iranian diet was designed. criterion validity of the calcium specific ffq was evaluated through comparing its result with five 24-h recalls...

This study aimed to develop spectrophotometry method using area under curve determine the levels of dextromethorphan HBr (DMP), doxylamine succinate (DOX) and pseudoephedrine HCl (PSE) in tablet dosage form ethanol as solvent. The is based on AUC absorption measurement wavelength ranges 273-283 nm for DMP, 262-272 DOX 251-261 PSE. Then, was applied PSE form. selection wavelengths gives best res...

We present an adaptive grid based algorithm to compute a family of relevant molecular surfaces. Molecular interfaces are important in simulations and visualization involving biomolecules. The Richards surface has traditionally been used as a good approximation to the surface, and defined as the surface formed by the inner facing part of a solvent probe atom rolling along the van der Waals surfa...

Lignocellulose is the most abundant source of saccharides and it therefore a promising feedstock for glycols, such as ethylene-glycol, via catalytic hydrogenolysis polysaccharides that contains. However, this step hampered by presence lignin other biomass contaminants, ash, which need to be removed in pretreatment step. We propose an organosolv-like pre-treatment can delignify de-ash lignocellu...

the method has been developed and validated for the determination of hydroquinone in liposomal formulation. the samples were dissolved in methanol and evaluated in 293 nm. the validation parameters such as linearity, accuracy, precision, specificity, limit of detection (lod) and limit of quantitation (loq) were determined. the calibration curve was linear in 1-50 µg /ml range of hydroquinone an...

The reduction of fossil CO2 emissions from key relevant industrial processes represents an important environmental challenge to be considered. To enable large-scale deployment low carbon technologies, a significant research and development effort is required optimize the capture systems. This work assesses various hybrid solvent-membrane configurations for post-combustion decarbonization coal-b...