11 Matching Results

Search Results

Advanced search parameters have been applied.
in subjects: "Absorption"  
Results: 1 - 11
open access

Method and apparatus for aerosol-particle absorption spectroscopy. [DOE patent application]

Description: A method and apparatus are described for determining the absorption spectra, and other properties, of aerosol particles. A heating beam source provides a beam of electromagnetic energy which is scanned through the region of the spectrum which is of interest. Particles exposed to the heating beam which have absorption bands within the band width of the heating beam absorb energy from the beam. The particles are also illuminated by light of a wave length such that the light is scattered by the pa… more
Date: June 25, 1981
Creator: Campillo, Anthony J. & Lin, Horn-Bond
Partner: UNT Libraries Government Documents Department
open access

Cavity resonance absorption in ultra-high bandwidth CRT deflection structure

Description: An improved ultra-high bandwidth helical coil deflection structure for a cathode ray tube is described comprising a first metal member having a bore therein, the metal walls of which form a first ground plane; a second metal member coaxially mounted in the bore of the first metal member and forming a second ground plane; a helical deflection coil coaxially mounted within the bore between the two ground planes; and a resistive load disposed in one end of the bore and electrically connected to th… more
Date: May 15, 1991
Creator: Dunham, M. E. & Hudson, C. L.
Partner: UNT Libraries Government Documents Department
open access

Palladium/kieselguhr composition and method

Description: Disclosed is a hydrogen-absorbing composition and method for making such a composition. The composition comprises a metal hydride, preferably palladium, deposited onto a porous substrate such as kieselguhr, for use in hydrogen-absorbing processes. The composition is made by immersing a substrate in a concentrated solution containing palladium, such as tetra-amine palladium nitrate. Palladium from the solution is deposited onto the porous substrate, which is preferably in the form of kieselguhr … more
Date: December 31, 1992
Creator: Mosley, W. C. Jr.
Partner: UNT Libraries Government Documents Department
open access

Low Temperature Sorbents for Removal of Sulfur Compounds from Fluid Feed Streams

Description: A sorbent material is provided comprising a material reactive with sulfur, a binder unreactive with sulfur and an inert material, wherein the sorbent absorbs the sulfur at temperatures between 30 and 200 C. Sulfur absorption capacity as high as 22 weight percent has been observed with these materials.
Date: June 1, 2004
Creator: Siriwardane, Ranjani
Partner: UNT Libraries Government Documents Department
open access

Solid Sorbents for Removal of Carbon Dioxide from Gas Streams at Low Temperatures

Description: New low-cost CO2 sorbents are provided that can be used in large-scale gas-solid processes. A new method is provided for making these sorbents that involves treating substrates with an amine and/or an ether so that the amine and/or ether comprise at least 50 wt. percent of the sorbent. The sorbent acts by capturing compounds contained in gaseous fluids via chemisorption and/or physisorption between the unit layers of the substrate's lattice where the polar amine liquids and solids and/or polar … more
Date: June 21, 2005
Creator: Sirwardane, Ranjani V.
Partner: UNT Libraries Government Documents Department
open access

Detection device for hazardous material

Description: This invention is comprised of a detection device that is activated by the interaction of a hazardous chemical with a coating interactive with said chemical on an optical fiber thereby reducing the amount of light passing through the fiber to a light detector. A combination of optical filters separates the light into a signal beam and a reference beam which after detection, appropriate amplification, and comparison with preset internal signals, activates an alarm means if a predetermined level … more
Date: December 31, 1990
Creator: Partin, J. K. & Grey, A. E.
Partner: UNT Libraries Government Documents Department
open access

Method and Apparatus for Monitoring the Integrity of a Geomembrane Liner using time Domain Reflectometry

Description: Leaks are detected in a multi-layered geomembrane liner by a two-dimensional time domain reflectometry (TDR) technique. The TDR geomembrane liner is constructed with an electrically conductive detection layer positioned between two electrically non-conductive dielectric layers, which are each positioned between the detection layer and an electrically conductive reference layer. The integrity of the TDR geomembrane liner is determined by generating electrical pulses within the detection layer an… more
Date: November 9, 1998
Creator: Morris, John L.
Partner: UNT Libraries Government Documents Department
open access

Low Temperature Sorbents for removal of Sulfur Compounds from fluid feed Streams

Description: A sorbent material is provided comprising a material reactive with sulfur, a binder unreactive with sulfur and an inert material, wherein the sorbent absorbs the sulfur at temperatures between 30 and 200 C. Sulfur absorption capacity as high as 22 weight percent has been observed with these materials.
Date: September 30, 1999
Creator: Siriwardane, Ranjan
Partner: UNT Libraries Government Documents Department
open access

Optical State-of-Change Monitor for Lead-Acid Batteries

Description: A method and apparatus for determining the instantaneous state-of-charge of a battery in which change in composition with discharge manifests itself as a change in optical absorption. In a lead-acid battery, the sensor comprises a fiber optic system with an absorption cdl or, alternatively, an optical fiber woven into an absorbed-glass-mat battery. In a lithium-ion battery, the sensor comprises fiber optics for introducing light into the anode to monitor absorption when lithium ions are introdu… more
Date: July 24, 1998
Creator: Weiss, Jonathan D.
Partner: UNT Libraries Government Documents Department
open access

Light absorption cell combining variable path and length pump

Description: This invention is comprised of a device for use in making spectrophotometric measurements of fluid samples. In particular, the device is a measurement cell containing a movable and a fixed lens with a sample of the fluid therebetween and through which light shines. The cell is connected to a source of light and a spectrophotometer via optic fibers. Movement of the lens varies the path length and also pumps the fluid into and out of the cell. Unidirectional inlet and exit valves cooperate with t… more
Date: December 31, 1992
Creator: Prather, W.S.
Partner: UNT Libraries Government Documents Department
open access

Organic or organometallic template mediated clay synthesis

Description: A method is given for incorporating diverse varieties of intercalants or templates directly during hydrothermal synthesis of clays such as hectorite or montmorillonite-type layer-silicate clays. For a hectorite layer-silicate clay, refluxing a gel of silica sol, magnesium hydroxide sol and LiF for 2 days with an organic or organometallic intercalant or template results in crystalline products containing either (a) organic dye molecules such as ethyl violet and methyl green, (b) dye molecules su… more
Date: December 31, 1992
Creator: Gregar, K.C.; Winans, R.E. & Botto, R.E.
Partner: UNT Libraries Government Documents Department
Back to Top of Screen