Ground fish scales were characterized as a solid phase extraction medium for preconcentration of parts per billion levels of transition elements prior to their flame atomic absorption spectroscopic (FAAS) determination. At the indicated optimum pH, sorption follows the order Cd (pH 7.0) ≥ Pb (pH 5.5)> Fe (pH 4.8) > Cu > Zn (pH 6.0) > Ni (pH 7.5) > Mn (pH 8.5) > Cr (pH 4.8). At pH 5.5, following...

This work describes a nonenzymatic, isothermal genotyping method based on the kinetic differences exhibited in the dehybridization of perfectly matched (PM) and single-base mismatched (MM) DNA duplexes in an alkaline solution. Multifunctional encoded hydrogel particles incorporating allele-specific oligonucleotide (ASO) probes in two distinct regions were fabricated by using microfluidic-based ...

BACKGROUND Industrial-scale biocatalytic synthesis of fine chemicals occurs preferentially as continuous processes employing immobilized enzymes on insoluble porous carriers. Diffusional effects in these systems often create substrate and product concentration gradients between bulk liquid and the carrier. Moreover, some widely-used biotransformation processes induce changes in proton concentra...

A luminescent probe for determination of pH was designed based on a Förster resonance energy transfer (FRET) system, combining a europium chelate as the donor and carboxynaphtho-fluorescein as a pH sensitive acceptor. The FRET system enables referenced pH detection in an exceptional broad dynamic range from pH 3 to 9.

I report on two papers, hep-ph/9806279 and hep-ph/9807336, where complementary strategies are proposed for the determination of the chargino/neutralino sector parameters, M1,M2, μ and tanβ, from the knowledge of some physical observables. This determination and the occurrence of possible ambiguities are studied as far as possible analytically within the context of the unconstrained MSSM, assumi...