SYNOPSISThe chemical modification of poly(acrylonitri1e) was carried out using monoethanolamine and lðylenediamine. The effect of the reaction conditions on the content of basic groups was studied. Polymer analogous reactions were carried out by varying the amount of the starting reagents and the temperature. The amino-containing polymers were characterized by elemental analysis. The obtained water-soluble polymers were used as carriers of low-molecular substances. 0 1996 John Wiley & Sons, Inc.
A sensitive and rapid magnetic-nanoparticles-based fluorescent immunoassay (MNPs-FIA) for individual and simultaneous determination of dichlorvos (DDVP) and paraoxon in untreated raw milk was developed. The conjugates DDVP-cBSA (cationized bovine serum albumin) and paraoxon-BSA (bovine serum albumin) were labeled by fluorescent dyes. The optimal amount of immobilized polyclonal anti-DDVP and anti-paraoxon antibodies on MNPs (0.375 mg Ab-MNPs) and optimal concentrations of DDVP-cBSA-FITC (18 µg/mL) and paraoxon-BSA-FITC (22 µg/mL) for MNPs-FIA were determined. The calibration curves of individual and simultaneous immunoassays of DDVP and paraoxon were investigated. The IC 50 value of the individual paraoxon assay in raw cow's milk was 60 ng/mL and linear range 2-300 ng/mL. The IC 50 value of the individual DDVP assay was 70 ng/mL and linear range 5-300 ng/mL. The IC 50 values of the paraoxon and DDVP (100 and 120 ng/mL respectively) in simultaneous assay were higher than those of the individual ones, and their linear ranges were 10-400 ng/mL.
The fatty acid methyl esters (FAME) of triglycerides obtained by transesterification reaction in the presence of alkaline catalysts became a serious alternative of fossil fuels. In the present research FAME synthesized from five different in their chemical nature and composition vegetable oils were studied. The data for analysis and characterization of FAME was obtained using fourier transform infrared spectroscopy and then basic properties of biodiesel fuels were determined. The confirmation and validation of the results were proved by classical chemical methods of analysis. The ability for express analysis of biodiesel fuels by IR spectroscopy was confirmed and the achieved results are reliable basis for the biofuels stability research.
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