Abstract: An electrochemical apparatus and method for supplying volatile hydrides of sufficient purity, at the proper pressure, and in the required volume, for direct introduction into a chemical vapor deposition reactor in which semiconductors are manufactured and doped.
Abstract: The Rapid Sediment Analyzer provides information on the size distribution of a sample of finely divided particulate matter (e.g. sand) by monitoring the weight and the rate with which the particles fall through a column of liquid (e.g. water). A digital computer connected to the Analyzer reports the particle size distribution directly.
Abstract: A vertical dropshaft having internal helicoidal ramps for dissipating the energy of liquid passing through the dropshaft and for exhausting air entrained by the falling liquid up the center of the dropshaft.
Abstract: An improved device for replicating cultures of microorganisms grown in petri plates which pierces colonies with an array of fine needles. The device is capable of at least ten replications, and will replicate virtually any colony.
Abstract: The cardiac catheter of this invention combines in a single, thin tube, an acoustic transducer for determining blood flow velocity, and a separate lumen with a removable, flexible, radio-opaque guide wire, enabling the surgeon to locate the site of arterial blockage, evaluate the blockage, and assess the effect of the treatment.
November 1, 1984
Date of Patent:
May 20, 1986
University of Iowa Research Foundation
Donald E. Laughlin, Robert F. Wilson, Thomas A. Drews
Abstract: A perforated gel-supporting structure with a temporary seal attached to it divides a cylindrical dish into cylindrical compartments A and B. Microorganisms are grown on agar poured into compartment A. The dish is inverted, the seal removed, and a second nutrient medium is poured into compartment B. Antibiotic substances produced by the microorganisms diffuse through the agar and inhibit growth of pathogens which have been inoculated into compartment B.
Abstract: A saucer-shaped, resilient cup, sealed to a flat cover with an aperture in it to fit over the orifice of Stenson's duct from the parotid gland, adheres to the inside of the cheek, held in place by negative pressure, to collect the secretion of the parotid gland. Nothing protrudes from the mouth during collection of the sample.
Abstract: A chemical, useful as a warp size, which is soluble in water at one temperature and insoluble at a different temperature, is applied to textile yarns in the process known as slashing. By manipulation of temperatures the chemical is reclaimed and recycled as a warp size. The water from the reclamation step may be recycled, or the water may be discharged with a minimum of waste treatment.
Abstract: An aqueous foam is disposed in a litter tray under an animal cage to receive, conceal, suspend and deodorize animal wastes. When the foam has become soiled, it is cleaned from the tray with a jet or jets of water. The trays may be cleaned in a portable tray washing machine especially adapted for the purpose. A single continuous tray may be provided beneath a multiplicity of cages to receive the aqueous foam, from which the soiled wastes can be flushed by a stream of water into a container for the purpose.