In the course of a study of circadian rhythmicity in the number of cells in the S-phase of the cell cycle in mouse kidney, a comparison was made between 2 methods of estimation of DNA synthetic activity. One of the methods used was an autoradiographical analysis of the tritiated thymidine labelling index; the other was a biochemical assay of the DNA content of the tissues coupled with liquid sc...

The rates of true and apparent photosynthesis of two unicellular green algae, one diatom and four blue-green algae were measured in buffer at pH 8.0 at subsaturating concentrations of dissolved inorganic carbon (13-27 micromolar). Initial rates of depletion from the medium of inorganic carbon and (14)C activity caused by the algae in a closed system were measured by gas chromatography and by li...

The ionosphere has practical importance in GPS (Global Positioning System) applications because it influences transionospheric radio wave propagation. Among various phenomena in the ionosphere, ionospheric scintillation is characterized by rapid fluctuation and fading of the received signal intensity due to electron density irregularity inside the ionosphere. Deep signal fading caused by scinti...

The scintillation index on the axis for Gaussian beams focused and collimated in weak marine turbulence is formulated via usage of Rytov method. average bit error rate <BER> evaluated using this formulation. versus propagation distance source size are determined by log-normal distributed. Intensity focused. beams, which exhibited wavelength, size, focal length, <SNR>. revealing more...

Radio Frequency (RF) signals transmitted by Global Navigation Satellite Systems (GNSS) are exploited as of opportunity in many scientific activities, ranging from sensing waterways and humidity the terrain to monitoring ionosphere. The latter can be pursued processing GNSS through dedicated ground-based equipment, such Ionospheric Scintillation Total Electron Content Monitoring (GISTM) receiver...

The gas proportional scintillation counter/microstrip gas chamber (GPSC/MSGC) hybrid detector for X-ray spectrometry is described. The detector uses a CsI-coated microstrip plate placed in direct contact with the gas-filling as the photosensor readout for the GPSC scintillation substituting for the photomultiplier tube (PMT). Usable photosensor maximum gain is limited by optical positive feedba...

The crystal identification and particle identification require applying pulse shape discrimination (PSD) or Crystal Identification (CI) me thods to differentiate between two or more types of scintillation pulses according to their decay times. The characterizations of scintillation pulses significantly affect the performance and the complexity of the CI algorithm. This paper implements a mathem...

The scintillating grid illusion is an intriguing stimulus consisting of a grey grid on a black background, with white discs at the grid intersections. Most viewers perceive illusory "scintillating" black discs within the physical white discs, especially at non-fixated locations. Here, we report for the first time that this scintillation percept is stronger when the stimulus is viewed binocularl...

Alternative counting methods for the Abbott “AusR1A” hepatitis-associated antigen test have been devised and evaluated. These methods involve solubilization of the tube-bound radiolabeled complex with glacial acetic acid, transfer of the eluate to a counting vial of choice, and measurement by either a gamma scintillation or a liquid scintillation system. These methods, when compared to the dire...