Colorimetry of iron in serum with Ferrozine (as used in the Technicon SMAC) or with bathophenanthroline (as used in the Du Pont aca) is influenced by EDTA, in contrast to such measurements with atomic absorption spectroscopy. Therefore EDTA contamination should be avoided with these colorimetric methods. If, however, contamination with EDTA is suspected, addition of zinc sulfate to serum or to ...

New systems are required for optical limiting against broadband laser pulses. We demonstrate that the association of non-linear scattering from single-wall carbon nanotubes (SWNT) and multiphoton absorption (MPA) from organic chromophores is a promising approach to extend performances of optical limiters over broad spectral and temporal ranges. Such composites display high linear transmission a...

However, when dealing with hardcopy materials (paper and inks) that contain fluorescent components, the color measurements become questionable. Conventional spectrophotometers measure total radiance factors of fluorescent materials for the light source within the instrument. Such measurements cannot be used to obtain accurate colorimetry for other illuminants or sources. On the other hand using...

In the title compound, [AgCl(C(2)H(2)N(2)S(2))](n), the Ag(I) ion has a distorted tetra-hedral geometry, defined by two S atoms of two symmetry-related 1,3,4-thia-diazo-lium-2-thiol-ate ligands and two chloride ions. The Ag(I) ions are bridged into a two-dimensional network parallel to the ab plane by chloride ions and thia-diazole ligands. In the network, the Ag(I) ions are separated by 4.0316...

On-chip transformation of Escherichia coli cells was accomplished for the first time using a microbial array chip. The continuous E. coli transformation procedures were performed on a chip in which the microcompartment was composed of PDMS microfluidic channels and a silicon substrate predeposited with different plasmid DNAs. The PDMS microfluidic device enabled the parallel transformation of E...

Staling of bread is cause of significant product waste in the world. We 26 reviewed the literature of last 10 years with the aim to give an up-to-date overview on 27 processing/storage parameters, antistaling ingredients, sourdough technology, and 28 measurement methods of the staling phenomenon. Many researchers have been focusing their 29 interest on the selection of ingredients able to retar...

The tinting strength of the pigments used to colour concrete products such as pavers and roof tiles is of particular significance. Pigments with high tinting strength will create a more intense colour than those with lower tinting strength, even if the same quantities are used. This means that smaller amounts of the pigments with high tinting strength are needed to create a certain colour inten...

An automated assay suitable for estimating urinary oestrogens in pregnant women has been investigated. Fluorimetry was found to have considerable advantages over colorimetry. The fluorimetric assay was simpler, more precise, more sensitive, and eliminated the need for correction for non-specific chromogens; in the assay of oestriol in pregnant women there was no need for correction for non-spec...