A simple, fast and inexpensive analytical method was developed and validated for screening of Fluroxypyr-Meptyl, a selective post-emergent systemic broadleaf herbicide in onion (plant leaf, bulb) and soil using GC-MS/MS. The method comprised of extraction with ethyl acetate using matrix solid phase dispersion method followed by column chromatographic and dispersive solid phase extraction cleanu...

The non-metallic inclusions are inevitable consequence of metal elaboration processes and are foreign phases always present in solid and liquid metal. The inclusions have a different shape and a size from several to several hundred micrometers (in diameter). They are randomly distributed in the matrix of the base metal and form a dispersion phase in liquid and in solid metallic phase. The non–m...

This review aims at summarizing the most recent updates in the field of acrylamide (AA) formation (mechanism, conditions) and the determination of AA in a number of foods (fried or baked potatoes, chips, coffee, bread, etc). The methods applied for AA detection [Capillary Electrophoresis-Mass Spectrometry (CE-MS), Liquid Chromatography-Mass Spectrometry (LC-MS), Non-Aqueous Capillary Electropho...

cefquinome sulfate (cs) is a fourth-generation cephalosporin, which has been developed solely for veterinary use. it shows potent antibacterial activity against a broad spectrum of bacterial species. however, cefquinome is susceptible to hydrolysis, which limiting its clinical employment efficacies to some extent. so, in this study, to increase cefquinome sulfate biological half-life, a novel c...

Dispersions of ionic polymer latex (diameter = 600 nm) consisted of 10 to 1000 particles were confined in spherical voids having diameters of several tens pm formed in a hydrogel (agarose) matrix. The system was constructed first by confining the latex dispersions in giant liposomes, immobilizing the liposomes by using the hydrogel matrix, and then removing the liposome membranes from the matri...

ibuprofen solid dispersions were prepared by the solvent and fusion-solvent methods using polyethylene glycol (peg), polyvinylpyrrolidone (pvp), eudragit rs po, eudragit rl po and hydroxypropylmethylcellulose (hpmc) as carriers to improve physicochemical characteristics of ibuprofen. the prepared solid dispersions were evaluated for the flowability, solubility characteristics and dissolution be...

We consider transport of a solute that undergoes a nonlinear heterogeneous reaction: after reaching a threshold concentration value, it precipitates on the solid matrix to form a crystalline solid. The relative importance of three key pore-scale transport mechanisms (advection, molecular diffusion, and reaction) is quantified by the Péclet (Pe) and Damköhler (Da) numbers. We use multiple-scale ...

Background and objectives: Colocynthin is the major active secondary metabolite of colocynth, Citrullus colocynthis (L.) Schrad, which has been used in traditional and ethno medicine of many countries.  It could be considered as an active marker for quality control of colocynth and its herbal products. Analysis and standardization of colocynth and its herbal preparations are a critical...