Abstract: A method for efficiently separating and collecting an optically active amino acid amide and an optically active amino acid from an aqueous solution containing the optically active amino acid amide and the optically active amino acid includes separating and collecting an optically active amino acid amide from an aqueous solution containing the optically active amino acid amide and an optically active amino acid, utilizing a difference in solubility in an organic solvent between the optically active amino acid amide and the optically active amino acid, without desalting the aqueous solution or after desalting the same, under such a condition that a ratio (C/A) of the total equivalent (C) of cations to the total equivalent (A) of anions contained in the aqueous solution falls within the range from 0.95 to 1.05 when the aqueous solution is not desalted, and the range from 0.5 to 1.5 when the aqueous solution is desalted.

Abstract: A method and apparatus for controlling power supplied to a motor comprising a power controller having a source of electrical power for providing the necessary power to operate the apparatus, an oscillator for generating gating signals at a relatively higher frequency than the electrical power supplied, circuitry responsive to the gating signals for gating the low frequency electrical power to generate a DC voltage, and an inhibitor for inhibiting the generating of gating signals by the oscillator to regulate the DC voltage generated so as to control the speed of any motor connected to the apparatus. The apparatus may be setup to inhibit the oscillator when certain circuit conditions such as an over current condition is detected. The apparatus may also be setup to keep the oscillator in an OFF state once inhibited until a specified amplitude or period of the input signal has been reached.

Abstract: A multichannel stimulation system includes a plurality of implantable microminiature stimulators (microstimulators), each being connected to a respective implanted electrode or electrode array. Each microstimulator is selectively operable as controlled by an external (non-implanted) control unit. The electrode or electrode array is implanted so as to contact nerves and/or tissue that is to be stimulated. Operating power is inductively coupled from the control unit to the microstimulators. An information signal is also coupled to the microstimulators to control which of the microstimulators is to be activated to provide a stimulation pulse to its respective electrode. In one embodiment, the invention provides a cochlear prosthesis with an intracochlear electrode array being implanted within the human cochlea, and with selected electrodes of the array being connected to individual ones of the plurality of microstimulators.

Abstract: A reagent for reticulocyte counting by flow cytometry characterized in that it contains a carbonate salt.If a blood sample is left exposed to ordinary air, non-specific staining of erythrocyte can be prevented with the addition of not less than about 1 mM of NaHCO.sub.3.