Fluorescence spectroscopy is a powerful analytical technique due to bright signals that provide excellent measurement sensitivity. Many colors of fluorescent dyes are available to match the detection ranges of different equipments. Dyes can be chemically modified to bind to many different target analytes with high specificity1. Alternatively, sensors can be...
Ethanolysis reactions were conducted on the flavonoids, such
as, catechin, quercetin and dihydroquercetin, and polymeric phenolic
components from conifer barks, such as, mountain hemlock phlobatannin
and Douglas-fir phlobaphene with the object of ascertaining
their chemical relationship. These reactions were carried out with
absolute ethanol in the presence of 2.5% hydrogen...
Molecular connectivity is a topological descriptor of
a molecule. It has been used as an independent variable
to describe biological activities, physicochemical
parameters (melting points, boiling points, partition
coefficients) and chromatographic retention indices. There
are inherent problems in using molecular connectivity. A
zero connectivity term has two opposing meanings: 1)...
Malonaldehyde, a very reactive member of the homologous
series of dialdehydes, is associated with the autoxidative deterioration
of lipids. Its measurement, in autoxidized lipid systems is an
expression of the extent of oxidation, in lipids. Malonaldehyde lends
itself well to such determinations because of the sensitivity and
specificity of its...
An automated radiochemical flow analysis (ARFA) system was developed which integrates chemical and radiochemical techniques into one system through the use of a microcomputer. The operator, through the microcomputer, controls valves and pumps to transfer sample and reagent solutions to counting loops, ion exchange columns and holdup reservoirs. A Ge(Li)...
The overall concept of reducing laboratory operations to a scale that fits on a single microfluidic chip has been an attractive area of research over the last several decades. Despite a surge in research, few commercial success stories have been written. Lab-on-a-chip technologies have the capability to be cost effective...