Michael Menard

Learn More
Zinc uptake into isolated brush border membrane vesicles from rat intestine was investigated by using a rapid filtration technique. Uptake was saturable at 0.2 mM extravesicular zinc, while at 1.0 mM zinc uptake was nonsaturable. ATP and Na+ did not stimulate uptake. Some binding of zinc was noted at zero intravesicular space indicating some membrane(More)
1. Physostigmine administration has been previously shown to decrease the uptake of serotonin in human platelets. In order to test whether uptake could be inhibited as a nicotinic-cholinergic effect, the in vitro effects of nicotine on platelet 5HT uptake and efflux were examined. 2. Nicotine stimulated release of serotonin from human blood platelets, and(More)
Response of intestinal metallothionein and zinc to dietary zinc intake was investigated in zinc-depleted rats, after a single feeding by stomach tube of a purified diet supplemented with either 125 ppm zinc or less than 1 ppm zinc. Serum zinc concentration was maximal 3 hours post-feeding, then stabilized at lower levels returning to baseline concentration(More)
We demonstrate a double-stage four-wave mixing (FWM) scheme in silicon nanowaveguides which allows effective optical time-division-multiplexed data generation and reception in the 2-μm region. The scheme is based on a first mixing stage which unicasts a high-speed return-to-zero stream from the C-band to 1884-nm, followed by a second mixing stage(More)
In this work we present a comparative study of three image deconvolution methods applied to fluorescence images of neural proteins. The purpose of this work is to compare the efficiency of these methods, in order to establish which one performs better the restoration of this type of image. Moreover we show that image deconvolution improve not only image(More)
We report extremely large probe-idler separation wavelength conversion (545 nm) and unicast (700 nm) of 10-Gb/s data signals using a dispersion-engineered silicon nanowaveguide. Dispersion-engineered phase matching in the device provides a continuous four-wave-mixing efficiency 3-dB bandwidth exceeding 800 nm. We report the first data validation of(More)
We experimentally demonstrate four-wave-mixing (FWM)-based continuous wavelength conversion of optical differential-phase-shift-keyed (DPSK) signals with large wavelength conversion ranges as well as simultaneous wavelength conversion of dual-wavelength channels with mixed modulation formats in 1.1-cm-long dispersion-engineered silicon waveguides. We first(More)
The first implementation of an integrated filter for optical space switching based on coupled Fabry-Perot cavities built in a planar waveguide and working at oblique incidence is presented in this paper. Parabolic mirrors are used to collimate and direct light into a filter defined by deep etching in a GaAs waveguide and formed of four high-order cavities(More)