Excitation energy transfer from semi-conducting polymers to fluorescent dyes (or dye-labeled analytes) is commonly used in sensor applications, e.g., for DNA and protein sensing. Semi-conducting polymers show rather high absorption cross-sections and a high intra-chain mobility of the delocalized excitations leading to a high sensitivity for the excitation light. However, sensing of biological ...

We characterized the pattern of gap junctional communication in the 7.5-d mouse embryo (at the primitive streak or gastrulation stage). First we examined the pattern of dye coupling by injecting the fluorescent tracers, Lucifer Yellow or carboxyfluorescein, and monitoring the extent of dye spread. These studies revealed that cells within all three germ layers are well coupled, as the injected d...

We hypothesized that modulation of the effective charge density of the endothelial surface layer (ESL) results in altered arterial barrier properties to transport of anionic solutes. Rat mesenteric small arteries (diameter approximately 190 microm) were isolated, cannulated, perfused, and superfused with MOPS-buffered physiological salt solutions. MOPS-solutions were of normal ionic strength (1...

A series of polyene–diphenylaniline based organic dyes (coded as D5, D7, D9 and D11) have been reported for the application in ionic liquid electrolyte based dye-sensitized solar cells. The effects of substitution of organic dyes on the photovoltaic performance have been investigated, which show addition of methoxy groups on the triphenylamine donor group increases short-circuit current, open-c...

Explant cultures were established from capsule/epithelium preparations from both normal and cataractous lenses to investigate properties of human lens epithelial cells. The cultured cells were found to have similar membrane potentials to whole human lenses and isolated epithelia, and similar free ionic concentrations of potassium, sodium, and calcium (131 mM, 17 mM and 0.8 microM respectively) ...

We characterized gap junctional communication in the extraembryonic tissues of the 7.5-d gastrulating mouse embryo. At this stage of development, the extraembryonic tissues form a large part of the conceptus, and link the embryo proper to the maternal tissue. Using Lucifer yellow injections, cells in most extraembryonic tissues were observed to be very well dye coupled, the only exception being...

Dr. Richard E. Schell, Department of Surgery, 21213 B Hawthorne Blvd. Suite 5558, Torrance, CA 90503 (USA) Dear Sir, A great deal of interest has been paid to the regulation of proton and ion transport systems. The control of renal epithelial permeability must perform the twofold task of regulating both physiologic ionic and acid-base balance of the organism as a whole as well as maintaining an...