LXIII. A form of cosine flicker photometer

Lxiii. Studies on the Permeability

IN earlier papers of this series [Davson, 1934; Davson and Danielli, 1936] attention has been drawn to the work of Ponder and Saslow [1930; 1931] on the volumes of rabbit's erythrocytes. These authors observed that in hypotonic solutions the erythrocytes gained much less water than was expected and in hypertonic solutions lost far less; in fact an increase in volume ofthe erythrocytes was gener...

A lithium internal-standard flame photometer.

OPTIMA: A Photon Counting High-Speed Photometer

OPTIMA is a small, versatile high-speed photometer which is primarily intended for time resolved observations of young high energy pulsars at optical wavelengths. The detector system consists of eight fiber fed photon counters based on avalanche photodiodes, a GPS timing receiver, an integrating CCD camera to ensure the correct pointing of the telescope and a computerized control unit. Since Ja...

International Union of Pharmacology. LXIII. Retinoid X receptors.

The physiological effects of retinoic acids (RAs) are mediated by members of two families of nuclear receptors, the retinoic acid receptors (RARs) and the retinoid X receptors (RXRs), which are encoded by three distinct human genes, RXRalpha, RXRbeta, and RXRgamma. RARs bind both all-trans- and 9-cis-RA, whereas only the 9-cis-RA stereoisomer binds to RXRs. As RXR/RAR heterodimers, these recept...

Abrupt and ramped flicker-defined form shows evidence for a large magnocellular impairment in dyslexia.

Controversy still exists over whether there is a magnocellular deficit associated with developmental dyslexia. Here we utilised a magnocellular system-biased phantom contour form discrimination task defined by high temporal frequency contrast reversals to compare contrast sensitivity in a group of children with dyslexia and an age- and nonverbal intelligence-matched control group (9-14 years). ...