In this paper, we consider iterative methods for solving a partial eigenvalue problem real symmetric interval matrices. Such matrices have applications in modeling many technical problems where lot of data suffers from limited variation or uncertainty. most applied problems, when some parameter values fluctuate with known amplitude, then it can be considered that is advisable to use methods. Th...

This study reveals the presence of different carbapenemase genes (blaKPC, blaNDM, blaGES, and blaOXA48-like genes) detected directly from water samples and clonal dispersion (by pulsed-field gel electrophoresis [PFGE] and multilocus sequence typing [MLST]) of KPC-2-producing Enterobacteriaceae in two important urban aquatic matrixes from Rio de Janeiro, Brazil, highlighting the role of aquatic ...

It is internationally recognized that validation is necessary in analytical laboratories. The use of validated methods is important for an analytical laboratory to show its qualification and competency. This work describes the methods for validation of gamma spectrometric analytical procedure in the determination of some gamma emitters in environmental samples. The method was tested and validat...

334 CLINICAL CHEMISTRY, Vol. 25, No. 2, 1979 is used at pH 7.4 and the fact that this interference depends on the type of tracer and pH at which the assay is performed are significant. Also the observation that the introduction of an ethanol precipitation step into the assay eliminates the effect of variation in the matrixes of commercial standards provides for a significant improvement in the ...

hard magnetic srfe12o19 (srm) nanoparticles were synthesized by a facile sonochemical reaction. the magnetic nanoparticles were then added to acrylonitrile-butadiene-styrene, polystyrene, polycarbonate, and poly sulfone to make magnetic nanocomposites. the magnetic properties of the samples were also investigated using an alternating gradient force magnetometer. the strontium ferrite nanopartic...

Chromophores with optimized second-order optical nonlinearity to optical loss ratios are synthesized, poled with an electrical field, and coupled into hardened polymer matrixes. Acentric order, which is necessary for electro-optic activity, is optimized by the consideration of chromophore-chromophore electrostatic interactions as well as chromophore-poling field interactions and thermal collisi...