摘要:
Leached nanocrystalline materials having a high specific surface are particularly useful for storing hydrogen or as catalysts or electrocatalysts in the manufacture electrodes, especially for fuel cells. Such materials can be manufactured by preparing a nanocrystalline material consisting of a metastable composite or alloy of at least two different chemical elements. To be nanocrystalline, this material must have a crystalline structure with the grain size lower than 100 nm. Then, the so prepared nanocrystalline material can be subjected to a leaching treatment in order to eliminate partially or totally one of the elements of the composite or alloy. This leaching results in nanocrystalline materials having a porous structure and, thereby, the requested high specific surface.
摘要:
The invention relates to novel bipolar electrodes with a cathodic coating on one portion of the electrode and an anodic coating on another portion of the same electrode. The anodic coating is preferably a DSA coating and the cathodic coating is an alloy such as Fe3−xAl-1+xMyTz. The invention also relates to the use of said novel electrodes for synthesising sodium chlorate.
摘要:
An intraocular lens having a light-transmitting optic (32, 94a, 94b, 142, 148, 216) comprised of a synthetic light-refractive material (40, 102) operably coupled with a flexible optic positioning member (34, 62, 74, 84, 100, 150, 210) to refract light onto the retina in order to correct refractive errors in the eye (10). The refractive material has an index of refraction of from about 1.36 to 1.5 or higher. The optic positioning member (34, 62, 74, 84, 100, 150, 210) is constructed of a flexible synthetic resin material such as polymethylmethacrylate and permits focusing upon objects located near to and far from the viewer. The optic (32, 94a, 94b, 142, 148, 216) of the present invention possess greater refractive capability than optics conventionally used in IOL construction, and permits retinal receipt of the image being viewed in order to correct refractive errors.
摘要:
An electromagnetic flowmeter for measuring a flow rate of a fluid in a pipe is described. A pipe carries a fluid. A magnetic coil is disposed adjacent to the pipe for inducing a magnetic flux in the fluid. A plurality of electrodes are disposed within the pipe, and the plurality of electrodes are electrically isolated from one another. Measurement circuitry is coupled to at least one of the plurality of electrodes and is configured to measure flow rate as a function of a potential across the plurality of electrodes. An empty pipe detector is coupled to at least one of the plurality of electrodes and is adapted to detect an empty pipe condition based upon an adjustable test criteria. In one embodiment, a local operator interface is coupled to the empty pipe detector for adjusting the adjustable test criteria.
摘要:
Disclosed is a method for inducing desorption of hydrogen for a metal hydride by applying thereto sufficient energy to induce hydrogen desorption by endothermic reaction. The energy that is so-applied is non-thermal and selected from the group consisting of mechanical energy, ultrasonic energy, microwave energy, electric energy, chemical energy and radiation energy.
摘要:
A visible and/or MRI visualizable permanent image is formed in a gel in a container which maintains the gel a dimensionally stable shape, which gel contains uniformly dispersed therein in storage stable form at last one radiant energy, e.g., ionizing radiation, polymerizable monomer in a concentration effective to form an insoluble polymer in the gel which alters the relaxation time of the solvent in any area thereof in which the polymer is formed, e.g., a mixture of (a) a linearly homopolymerizable monomer and (b) a comonomer which is cross-linkably copolymerizable with the monomer, the polymerization of the monomer initiated by the radiant energy being restricted to any area of the gel which receives the radiant energy, which image is representative of the dose distribution of the radiant energy to which the gel is exposed, by exposing the gel to a non-uniform dose of radiant energy until a polymer which produces a permanent image representative of the dose of radiant energy received by the gel is formed therein.
摘要:
A container configured for containing at least metallic particles, the metallic particles capable of absorbing hydrogen such that the metallic particles expand upon the absorption of hydrogen, the container including an inner surface, comprising: a liner disposed within the container such that a void space is provided between the liner and the inner surface, wherein the liner engages the inner surface to substantially prevent ingress of metallic particles, when the metallic particles are contained in the container, into the void space. A method of assembling a container for containing metallic particles capable of absorbing hydrogen is provided and comprises a container including an inlet and an inner surface defining a container space, rolling a magnetically responsive liner about a mandrel so that the liner assumes a spiral configuration about the mandrel, when the liner is rolled about the mandrel inserting the liner into the container space through the inlet, releasing the liner from the mandrel, removing the mandrel from the container space through the inlet, applying a magnetic force sufficient to urge the liner against the inner surface of the container, when the magnetic force is acting on the liner, inserting a plurality of tubes into the container space through the inlet so as to urge the liner into engagement with the inner surface so as to define (i) a storage space configured to contain the metallic particles and (ii) a void space configured to contract as the metallic particles expand upon the absorption of hydrogen, terminating the application of the magnetic force, and inserting a plurality of metallic particles into the storage space.
摘要:
A nitric oxide-stimulation laser has an applicator packet (1) containing at least one diode chip (2) with dedicated emission of infrared (IR) light in wavelengths of predeterminedly proximate 1,550 nanometers for being eye safe and non-invasive with battery power for a duty cycle of one on and three off at a desired rate of repetition for operating periods of fifteen minutes with automatic shutoff. The IR laser light is generated by passing a set current current of predeterminedly proximate 160 milliamps axially through a diode chip of preferably GaInAsP/InP. From a light-emission end (14) of the diode chip, an astigmatic and non-coherent beam (12) of IR light is emitted and converted with a beam processor (10) to collimated light beams (13) for effectively deep penetrative entry into a select portion of an animate body (15) for stimulation of animate generation of nitric oxide for improvement of the animate body. Wavelength and current can be manufacturer preset for safe use by ordinary people or variable within ranges preset by the manufacturer for more comprehensive non-invasive and eye-safe use. A method includes positioning the applicator packet where intended for use on the animate body, turning it on for either a preset time for a preset embodiment or an adjusted time for an adjustable embodiment, leaving it in place until it stops automatically, and repeating the process as desired.
摘要:
A ferromagnetic resonator for use in a marker in a magnetomechanical electronic article surveillance system has improved properties and can be manufactured at higher annealing speeds and reduced raw material cost by virtue of being continuously annealed in the simultaneous presence of a magnetic field perpendicular to the ribbon axis and a tensile stress applied along the ribbon axis and by providing an amorphous magnetic alloy containing iron, cobalt and nickel in which the portion of iron is more than about 15 at % and less than about 30 at %.
摘要:
Disclosed is a very light-weight, Mg and Be-based material which has the ability to reversibly store hydrogen with very good kinetics. This material is of the formula (M.sub.1-x A.sub.x) D.sub.y wherein M is Mg, Be or a combination of them; A is an element selected from the group consisting of Li, Ca, Ti, V, Cr, Mn, Fe, Co, Ni, Cu, Zn, Al, Y, Zr, Nb, Mo, In, Sn, O, Si, B, C and F; D is a metal selected from the group consisting of Fe, Co, Ni, Ru, Rh, Pd, Ir and Pt (preferably Pd); x is a number ranging from 0 to 0.3; and y is a number ranging from 0 to 0.15. This material is in the form of a powder of particles of the formula M.sub.1-x A.sub.x as defined hereinabove, having an average size ranging from 0.1 to 100 .mu.m, each particle consisting of nanocrystalline grains having an average size of 3 to 100 nm or having a nano-layered structure with a layer spacing of 3 to 100 nm. Some of these particles have clusters of metal D attached thereto, with an average size ranging from 2 to 200 nm. Also disclosed are a process for preparing this material which has a very high hydrogen absorption capacity, and a method of use of the same for the transportation and/or storage of hydrogen and/or the storage of thermal energy.