Abstract: An immobilized liquid membrane is employed to allow use of a product-extracting solvent which is normally toxic toward a cell layer which produces the product in a membrane-moderated biological reaction.

Abstract: In a list processing system, small reference counters are maintained in conjunction with memory cells for the purpose of identifying memory cells that become available for re-use. The counters are updated as references to the cells are created and destroyed, and when a counter of a cell is decremented to logical zero the cell is immediately returned to a list of free cells. In those cases where a counter must be incremented beyond the maximum value that can be represented in a small counter, the cell is restructured so that the additional reference count can be represented. The restructuring involves allocating an additional cell, distributing counter, tag, and pointer information among the two cells, and linking both cells appropriately into the existing list structure.

Abstract: An improved multilayer continuous biological membrane reactor and a process to eliminate diffusional limitations in membrane reactors in achieved by causing a convective flux of nutrient to move into and out of an immobilized biocatalyst cell layer. In a pressure cycled mode, by increasing and decreasing the pressure in the respective layers, the differential pressure between the gaseous layer and the nutrient layer is alternately changed from positive to negative. The intermittent change in pressure differential accelerates the transfer of nutrient from the nutrient layers to the biocatalyst cell layer, the transfer of product from the cell layer to the nutrient layer and the transfer of byproduct gas from the cell layer to the gaseous layer. Such intermittent cycling substantially eliminates mass transfer gradients in diffusion inhibited systems and greatly increases product yield and throughput in both inhibited and noninhibited systems.

Abstract: A tamper-resistant, reciprocating cylinder lock comprising a bolt and a bolt keeper having the capacity to prevent dislodgement of the bolt from engagement in its locked position with the keeper when the lock and keeper mechanism are under physical attack.

Abstract: A fastener is disclosed for affixing void-forming members to underlying concrete slabs for use in composite slab construction. Each fastener comprises a stem having a cross limb with a barbed end for insertion into a foam member, a stabilizer bar transversely projecting from one side of the stem intermediate its ends, and bottom barbs. Upon insertion of the barbs of the cross limb into a foam member and projection of the bottom barbs of the stem into a concrete slab, the foam member is thus secured thereto. Several fasteners spaced around the periphery of the member are employed. The concrete slab with void-forming members installed is then overlaid with a poured concrete cap, thereby forming a unitary composite construction.

Abstract: A foldable carry bag generally includes a flexible outer shell, foldable along a centerline thereof, to enable the bag to be opened to provide easy accessibility to compartments therein which are defined by flexible flaps attached to the outer shell and removably attached by zippers to flexible strips attached to end pieces of the carry bag. The bag is foldable to a flat configuration for storage and has the advantage of providing separate compartments within the bag which are easily accessible for packing and unpacking clothes, as well as arrangement of clothes or articles therein, while at the same time maintaining the lightweight and inexpensive features of conventional carry bags.