Abstract: A molecularly-imprinted polymeric material that selectively binds with an explosive compound. The molecularly-imprinted polymeric material comprises a cross-linked, water-soluble polymer having basic functional groups and a binding site capable of selectively binding an explosive compound. The basic functional groups have a pKa that is sufficiently high to react with the explosive compound to result in a visually detectable color change. For example, the basic functional groups may have a pKa in the range of 6.0-9.0. The molecularly-imprinted polymeric material may be used in a variety of applications, such as a projectile for detecting explosives. Also described is a method for making a molecularly-imprinted polymeric material.

Abstract: A combined sensor-transducer with a calculator or computer is provided in which the sensor senses mechanical motions as in muscular exercising to provide a transduced pulse to the calculator or transducer to tally the number of muscular movments or by inserting a factor in the computer to read out the pulses in terms of calories or energy. An improved type of reed switch is provided for sensing mechanical motions in which a magnet is slidably supported near magnetically responsive metal lead wires, the magnetic flux with each movement of the slidable magnet bending the wires into conductive contact.

Abstract: A portable electrical device having both flashing light and/or sound transmitting means activated by a transducer so that the transducer or the entire assembly may be mounted in pressure sensitive contact with a pulsing area of a living body to convert pulses to visible light flashes or sound beats adjustable in pressure sensitive pickup to reflect and monitor the blood flow through the pulse.