Abstract: A method of producing a composite oxygen ion membrane and a composite oxygen ion membrane in which a porous fuel oxidation layer and a dense separation layer and optionally, a porous surface exchange layer are formed on a porous support from mixtures of (Ln1-xAx)wCr1-yByO3-? and a doped zirconia. In the porous fuel oxidation layer and the optional porous surface exchange layer, A is Calcium and in the dense separation layer A is not Calcium and, preferably is Strontium. Preferred materials are (La0.8Ca0.2)0.95Cr0.5Mn0.5O3-? for the porous fuel oxidation and optional porous surface exchange layers and (La0.8Sr0.2)0.95Cr0.5Fe0.5O3-? for the dense separation layer. The use of such materials allows the membrane to sintered in air and without the use of pore formers to reduce membrane manufacturing costs. The use of materials, as described herein, for forming the porous layers have application for forming any type of porous structure, such as a catalyst support.

Abstract: A portable medical gas cylinder cart is disclosed. The portable medical gas cylinder cart comprises: (i) a moveable base having a forward section and an back section, the moveable base being supported above ground level with a plurality of wheels, casters or other moveable support structures; (ii) a front panel attached to the moveable base proximate the forward section that extends vertically upward from the base to hide the gas cylinders from view; (iii) a main body attached to the back section of the moveable base; and (iv) one or more adjustable gas cylinder shelves connected to the main body and adapted to hold one or more gas cylinders in a vertical upright orientation behind the front panel.

Abstract: Disclosed are methods and apparatus for forming frozen foam products, including edible products, using air or gases or gas mixtures having an average molecular weight larger than that of air, wherein the products contain bubbles having a reduced average size preferably in a narrow size range.

Abstract: The present invention relates to methods and systems for purifying gases, such as for example semiconductor process gases. The invention more particularly relates to fluid purification methods and systems having improved heat transfer capabilities and controls such that the purified fluid produced from the process contains reduced impurity levels and/or exhibits more uniform concentrations within the final product. In another aspect of the invention, the activation time for adsorbent beds used in such processes and systems can be reduced.