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Journals and Conferences
We describe an in vivo measurement technique for determining the transmission of light through the human eyelid and present data from three human subjects. The relevance of the transmission measurements are discussed in relation to (1) clinical electrophysiology and (2) the effects of light on the developing visual system.
Light transmission characteristics of the human adult and neonatal eyelid were measured in vivo. Light was delivered via a grating monochromator through a fibre-optic mounted onto a contact lens placed under the eyelid, and detected using a photodiode on its external skin surface. Data from 5 adult and 9 preterm neonatal subjects indicate that the eyelid… (More)
We present a scanning electron microscopy study of interaction of porous silicon prepared by stain etching with rat hippocampal neurons (B50, immortalised line). Porous Si has been prepared by stain etching both from crystalline and polycrystalline substrates. Two types of patterns have been examined: (i) 100 microm square pads separated by 100 microm of… (More)
We present the first example of the phase transition occurring via the different kinetic mechanisms, displacive or diffusive, competing with each other in quartz-like alpha-GeO2 single crystals. Upon room-pressure heating, alpha-GeO2 transforms to the rutile-type phase (the alpha-->r transition) via the diffusive mechanism. With increase of the treatment… (More)
Twelve types of phototherapy eyeshields showed peak light transmission of less than 0.1%, and none transmitted greater than 0.04% light in the 460 nm spectral region. Commercial eyeshields offered no advantage over locally made ones. The choice of shield may be less important than how it is secured over the infant's eyes.
The transmission characteristics of phototherapy eyeshields have been measured under conditions that mimic the clinical situation. Peak transmission (less than 10%) was detected at 700 nm for the poorest patch tested and less than 2% for either of the other patches examined. The optics of measurement systems are considered with reference both to this and… (More)
A new facility for simultaneous extended X-ray absorption of fine structure (EXAFS), X-ray diffraction and photoluminescence measurements under high pressures has been developed for use on station 9.3 at the Daresbury Laboratory Synchrotron Radiation Source. This high-pressure facility can be used at any suitable beamline at a synchrotron source. Full… (More)