Abstract: Surfactants useful for enhancing the electrical conduction of electrodes attached to the surface of a patient. The surfactants are also useful in transport of materials in and out of the body of a patient (animal or human) and in the measurement of disease states. Typical surfactants particularly useful in the invention are broadly represented by protein/fatty acid based compounds. The protein/fatty acid compounds may be lipopolypeptides. In some embodiments the lipopolypeptides may be acyl peptides. Typical acyl peptides are Lamepon S™, MayTein C™ and MayTein CT™.

Abstract: A protective mat for use with pressure-actuated switching devices having a moisture-resistant, isolated switching chamber protected by a puncture-resistant, protective layer which disperses forces applied to the mat.

Abstract: A protective mat for use with pressure-actuated switching devices having a moisture-resistant, isolated switching chamber protected by a puncture-resistant, protective layer which disperses forces applied to the mat.

Abstract: A ventilation system for use with devices which produce airborne impurities, particularly cooking grills, deep fat fryers and the like. A first blower supplies untempered makeup air. A first plenum, which includes a first perforated wall having a plurality of openings therein, supplies air from the first blower, via a duct, into space beneath an upper front portion of a hood. A second plenum, which includes a second perforated wall having a plurality of apertures therein, supplies air from the first blower, via a duct, into space beneath the hood to cool air and impurities, which may include flue gas, moving upwardly in space adjacent the second perforated wall, the apertures in the second perforated wall being positioned to discharge air substantially horizontally into this space. A second blower is provided for exhausting air and impurities from the hood via a duct and an exhaust plenum.

Abstract: Compositions comprising 50-75% w/w of lime, 20-30% w/w of fluorspar (CaF.sub.2), and up to 20% w/w of ground aluminum, and methods to desulphurize molten ferrous metals, notably molten steels, by adding said compositions to molten ferrous metals in the ladle, but more preferably, by injecting the composition in particulate form into the molten body of ferrous metals, e.g., molten steels.

Abstract: A power driven oscillating sifter oscillated by a motor driven crank arm with the sifter having a pair of end plates and a central baffle all secured to the shaft. A perforated semi-cylindrical sifter panel is detachably secured to the end panels by means of inturned flanges on the end panels. The sifter panel has a plurality of longitudinally extending ribs for agitating the material to be sifted and openings are provided in the baffle and the lower end wall to permit the exit of materials which will not pass through the perforations of the sifter panel.