摘要:
A coating composite is provided for a platform surface of an antenna array for, when applied to the platform, affording isolation of radiating and receiving antennas of the array. The coating composite includes a plurality of conductively coated elongate tubes dispersed in an insulating polymer matrix at a volume loading density approaching that at which the composite begins to conduct electrically over macroscopic distances, i.e., close to the percolation threshold. The tubes are preferably comprised of microtubules comprised of biologically-derived, high-aspect rod-shaped particles of microscopic dimensions having an electroless plated metal coating thereon.
摘要:
A method of making a molecularly imprinted porous structure makes use of a surfactant analog of the molecule to be imprinted that has the imprint molecule portion serving as the surfactant headgroup. The surfactant analog is allowed to self-assemble in a mixture to create at least one supramolecular structure having exposed imprint groups. The imprinted porous structure is formed by adding reactive monomers to the mixture and allowing the monomers to polymerize, with the supramolecular structure serving as a template. The resulting solid structure has a shape that is complementary to the shape of the supramolecular structure and has cavities that are the mirror image of the imprint group. Similarly, molecularly imprinted particles may be made by using the surfactant to create a water-in-oil microemulsion wherein the imprint groups are exposed to the water phase. When reactive monomers are allowed to polymerize in the water phase to form particles, the surface of the particles have cavities that are the mirror image of the imprint group.
摘要:
A method of making a molecularly imprinted porous structure makes use of a surfactant analog of the molecule to be imprinted that has the imprint molecule portion serving as the surfactant headgroup. The surfactant analog is allowed to self-assemble in a mixture to create at least one supramolecular structure having exposed imprint groups. The imprinted porous structure is formed by adding reactive monomers to the mixture and allowing the monomers to polymerize, with the supramolecular structure serving as a template. The resulting solid structure has a shape that is complementary to the shape of the supramolecular structure and has cavities that are the mirror image of the imprint group. Similarly, molecularly imprinted particles may be made by using the surfactant to create a water-in-oil microemulsion wherein the imprint groups are exposed to the water phase. When reactive monomers are allowed to polymerize in the water phase to form particles, the surface of the particles have cavities that are the mirror image of the imprint group.
摘要:
Nanostructured metal powders and films are made by dissolving or wetting a metal precursor in an alcoholic solvent. The resulting mixture is then heated to reduce the metal precursor to a metal precipitate. The precipitated metal may be isolated, for example, by filtration.
摘要:
Improved apparatus for sharpening a blade of an ice skate. The device includes a plurality of abrasive element holders, each having an external profile substantially the same as that of the other holders. Each holder is provided with a cavity formed therewithin within which an abrasive element can be received. An abrasive element is received within its corresponding holder with an arcuate surface of the element, having a radius of curvature different from that of an arcuate surface of another abrasive element, exposed on one side of the holder. Each holder can, in turn, be received within a chamber defined within a housing. The housing is provided with an elongated slot so that a blade of an ice skate can be passed therethrough and brought into engagement with the abrasive element received within the holder held within the housing. Means are provided to orient an abrasive element holder received within the chamber so that the exposed arcuate surface of the abrasive element can be engaged by the blade of the ice skate as the blade is passed through the slot.
摘要:
A test set designed to energize an oil filled circuit recloser with a reasonably constant current to simulate fault conditions for the purpose of verifying the recloser operation as specified by manufacturer's performance curves is disclosed. The test set of this invention is a self-contained unit comprising a selectable tapped auto-transformer, a variable vernier auto-transformer, a selectable power resistance bank, an output transformer, a control package and a monitor package.