Synthesis of cross-linked epoxy microparticles: effect of the synthesis parameters.

Epoxy crosslinked microparticles were synthesized from the reaction between diglycidyl ether of bisphenol A and a diamino hardener, through precipitation polymerization in a polypropylene glycol solvent. The influence of the monomer concentration, the amine/epoxy stoichiometric ratio, the reaction temperature and the structure of the diamine (aromatic or cycloaliphatic) were investigated, since these parameters may affect the structure and properties of the particles. Morphological analysis revealed that, in all cases, spherical particles were obtained with diameters ranging from 1 to 6 μm.

Adequate model complexity for scenario analysis of VOC stripping in a trickling filter.

Two models describing the stripping of volatile organic contaminants (VOCs) in an industrial trickling filter system are developed. The aim of the models is to investigate the effect of different operating conditions (VOC loads and air flow rates) on the efficiency of VOC stripping and the resulting concentrations in the gas and liquid phases. The first model uses the same principles as the steady-state non-equilibrium activated sludge model Simple Treat, in combination with an existing biofilm model.

Three epitope-specific monoclonal antibodies against the hapten penicillin.

Three monoclonal antibodies (Pen 4, Pen 7 and Pen 9) were raised against the benzylpenicilloyl group and used to investigate the antigenicity of this group. The binding of Pen 4 to carrier-bound penicillin derivatives was shown in an ELISA to be dependent on the structure of the side chain in the derivative. Hence Pen 4 recognizes this side chain.