The chip, with 15 spin valve sensors, was designed to be integrated in a recording chamber for submerged mice brain slices used for synaptic potential measurements. Under Bioactive Compound Library concentration stimulation
(rectangular pulses of 0.1 ms every 10 s) through a concentric electrode placed near the CA3/CA1 border of the hippocampus, the spin valve sensor readout signals with 20 mu V amplitude and a pulse length of 20 to 30 ms were recorded only in the pyramidal cell bodies region and can be interpreted as being derived from action potentials/currents. (C) 2011 American Institute of Physics. [doi: 10.1063/1.3562915]“
“Sub-micron Bi2Ru2O7+x + RuO2 oxide sensing electrodes (SE) for water quality sensors were prepared on platinised selleckchem ceramic substrate of the sensor. Their morphology was analysed by X-ray diffraction (XRD), scanning electron microscopy (SEM) and energy-dispersive X-ray analysis (EDX). Sensing properties of the Bi2Ru2O7+x + RuO2-SE were investigated for potentiometric detection of pH and dissolved oxygen (DO) in water in the temperature range of 4-30 degrees C. Sensor was capable to measure DO from 0.5 to 8.0 ppm and pH from 2.0 to 13.0, respectively. The obtained results
show acceptable linearity of the measuring characteristics. Long-term stability trial for Bi2Ru2O7+x + RuO2-SE revealed that bio-fouling can be one of the main destructive factors affecting the performance of the sensors in the long run. The screen-printing technology used find more in the multisensory implementation provides fundamental properties of miniaturization, reasonable accuracy and low cost. (C) 2010 Elsevier Ltd and Techna Group S.r.l. All rights
reserved.”
“We synthesized three new donor-modified push-pull chromophores with the same divinylenethio-phenyl bridge and tricyanofuran acceptor, but with different modified donor moieties. Structure analysis and photophysical properties were carried out to compare the molecular mobility and steric hindrance effect of different donor-modified chromophores. Density functional theory calculations and thermal properties showed the different results of chromophores’ microscopic nonlinearity and thermal stability. In electro-optic activities, the poling process demonstrated that guest-host electro-optic polymers containing the chromophores with different steric hindrance and molecular free mobility, required different optimal poling condition to achieve the large macroscopic electro-optic coefficients. After the exploration of the poling condition, it showed an ultra large electro-optic coefficient (266 pm/V) for electro-optic polymer WJ5-APC-2, which indicated the fine-tuning of steric hindrance and molecular free mobility of chromophore WJ5 in host polymer APC-2. Meanwhile, steric hindrance also improved the temporal stability of electro-optic coefficients for WJ5-APC-2. (C) 2013 Elsevier Ltd. All rights reserved.”
“Rhizobium leguminosarum bv.