Abstract: A method and apparatus for supplying a breathing gas mixture to a patient in which a desired concentration of oxygen is maintained when nitric oxide (NO) is provided in the breathing gases. A clinician establishes at a ventilator, ventilation parameters for the patient, the inspired oxygen concentration, and the inspired NO dosage. From these quantities, a breathing gas mixture flow rate is determined. An instantaneous flow rate for an NO containing gas is determined, based on the concentration of nitric oxide in the supply gas and the instantaneous breathing gas mixture flow rate. An instantaneous flow rate for the supply of a balance gas, such as air, is determined using the breathing gas mixture flow rate, the instantaneous NO containing gas flow rate, and the inspired oxygen concentration established by the clinician.

Abstract: A multi-layered gypsum board for construction purposes in which a mixture of gypsum, water and fibers provide the center or core of the board, and a composite coating of a fiberglass layer and a layer of fiberglass fleece covers one of the major surfaces of the core, with the fiberglass layer being embedded into the mixture and plaster favorably adhering to the outer surface of the fiberglass fleece layer. The other major surface of the core may be covered with a similar coating, or a layer, for example, of pasteboard.

Abstract: Particulate anhydrite, of whose particles from about 2 to 6% by weight have a particle size greater than about 5 mm, from about 13 to 23% by weight have a particle size of from about 5 to 3.15 mm, from about 33 to 40% by weight have a particle size of from about 3.15 to 1 mm, from about 17 to 23% by weight have a particle size of from about 1 to 0.2 mm, and from about 17 to 33% by weight have a particle size less than about 0.2 mm, will provide a mortar developing high early strength without requiring an excessive amount of water. If the particles having a size less than about 0.2 mm are activatingly ground to increase their energy content to above the minimum possible under ambient pressure and temperature conditions, a particularly speedy initial rise in strength takes place.