The mixing of molecules adsorbed from solution to different interfaces has both industrial and academic relevance and the mixing behaviour at the interface is a key to understanding for example, that the surface tension of a mixture of two surfactants is lower than either of the two pure materials and many other effects. In this paper, we report, for the first time, the application of Solid Sta...

As the coupling in a heterogeneous excitable medium is reduced, three different types of behavior are encountered: plane waves propagate without breaking up, plane waves break up into spiral waves, and plane waves block. We illustrate these phenomena in monolayers of chick embryonic heart cells using calcium sensitive fluorescent dyes. Following the addition of heptanol, an agent that reduces t...

HE detection, by agar gel electrophoresis, of as many as ten alcohol dehydrogenase isozymes in Drosophila melanogaster (URSPRUNG and LEONE 1965) presents a problem in the interpretation of genetic and epigenetic control of synthesis and function of multiple forms of enzymes. The observation that the three slowest cathodalIy migrating isozymes show a more intensive formazan staining when primary...

P, Vm, 7" data were established for 4'-n-hexyl-biphenyl-4-carbonitrile (6CB) and 4'-n-heptyl-biphenyl-4-carbonitrile (7CB) between 300 and 370 K up to 300 MPa, and specific volumes were determined for the liquid crystalline, isotropic, and also partly for the crystal phases. Volume and enthalpy changes at the phase transitions are also presented. In the case of 6CB, a new crystal phase has been...

Native microorganisms present on grapes can influence final wine quality. Chambourcin is the most abundant hybrid grape grown in Pennsylvania and more resistant to cold temperatures fungal diseases compared Vitis vinifera. Here, non-Saccharomyces yeasts were isolated from spontaneously fermenting must three regional vineyards. Using cultured-based methods ITS sequencing, Hanseniaspora Pichia sp...

The first recorded electroantennographic preliminary studies on stingless bees have been performed using two species of Frieseomelitta from Brazil. Experiments with F. silvestrii and F. varia showed that antennae respond to hexane extracts of heads and abdomens of both species and posterior tibia of F. silvestrii (which carry plant resin), as well as to the pure compounds 2-heptanol and 2-nonan...

Abstract Background Previous studies have quantified repolarization variability using time-domain, frequency-domain and nonlinear analysis in mouse hearts. Here, we investigated the relationship between these parameters ventricular arrhythmogenicity a hypokalaemia model of acquired long QT syndrome. Methods Left monophasic action potentials (MAPs) were recorded during right regular 8 Hz pacing ...