Thin Layer Chromatography Residue Applicator Sampler
Peter J. Nunes, Fredrick R. Kelly, Jeffrey S. Haas, Brian D. Andresen
U.S. Patent 7,247,273 B2
July 24, 2007
A thin-layer chromatograph residue applicator sampler provides for rapid analysis of samples containing high explosives, chemical warfare agents, and other items of interest under field conditions. The residue applicator sampler includes a sampling sponge that is resistant to most chemicals and is fastened via a plastic handle inside a hermetically sealed tube containing a known amount of solvent. During sampling, the wetted sponge is removed from the sealed tube and used as a swiping device across an environmental sample. The sponge is then replaced in the tube, where the sample dissolves in the solvent. A small pipette tip is also contained in the sealed tube. The sponge is removed and placed into the pipette tip, where a squeezing out of the dissolved sample from the sponge into the pipette tip results in a droplet captured in a vial for later analysis. Alternatively, the droplet is applied directly to a thin-layer chromatography plate for immediate analysis.
Conversion of Raw Carbonaceous Fuels
John F. Cooper
U.S. Patent 7,252,901 B2
August 7, 2007
Three configurations of an electrochemical cell are used to generate electric power from the reaction of oxygen or air with porous plates or particulates of carbon. Waste heat from the electrochemical cells flows upward through a storage chamber or port containing raw carbonaceous fuel. These configurations allow combining the separate processes of devolatilization, pyrolysis, and electrochemical conversion of carbon to electric power into a single-unit process, fed with raw fuel and exhausting high-British thermal unit gases, electric power, and substantially pure carbon dioxide during operation.
List Mode Multichannel Analyzer
Daniel E. Archer, S. John Luke, Joseph Mauger, Vincent J. Riot,
David A. Knapp
U.S. Patent 7,253,387 B2
August 7, 2007
A digital list-mode multichannel analyzer (MCA) is built around a field programmable gate array for onboard data analysis and modification of system detection and operating parameters. This MCA can collect and process data in short time periods (less than 1 millisecond) when used in histogram or list mode.
Autofluorescence Detection and Imaging of Bladder Cancer Realized through a Cystoscope
Stavros G. Demos, Ralph W. deVere White
U.S. Patent 7,257,437 B2
August 14, 2007
Near-infrared imaging using elastic light scattering, tissue autofluorescence, and interior examination techniques and equipment are explored for medical applications. This approach uses cross-polarized elastic light scattering or tissue autofluorescence in the near infrared coupled with image processing and interimage operations to differentiate human tissue?components.
Nonlinear Optical Crystal Optimized for Ytterbium Laser Host Wavelengths
Christopher A. Ebbers, Kathleen I. Schaffers
U.S. Patent 7,260,124 B1
August 21, 2007
A material for harmonic generation has been made by changing the crystal LaCa4(BO3)3, also known as LaCOB, to the form Re1xRe2yRe3zCa4(BO3)3O. In this form, Re1 and Re2 (rare-Earth ions 1 and 2) are selected from the group consisting of scandium, yttrium, lanthanum, cerium, praseodymium, neodymium, samarium, europium, gadolinium, terbium, dysprosium, holmium, erbium, thulium, ytterbium, and lutetium. Re3 is lanthanum, and x + y + z = 1.
Real-Time Detection Method and System for Identifying Individual Aerosol Particles
Eric E. Gard, Keith R. Coffee, Matthias Frank, Herbert J. Tobias,
David P. Fergenson, Norm Madden, Vincent J. Riot, Paul T. Steele, Bruce W. Woods
U.S. Patent 7,260,483 B2
August 21, 2007
An improved method and system have been developed for identifying individual aerosol particles in real time. Sample aerosol particles are collimated, tracked, and screened to determine which ones qualify for mass spectrometric analysis based on selection criteria. Screening techniques include determining particle size, shape, symmetry, and fluorescence. Only qualifying particles that pass all screening criteria are subject to desorption ionization and single-particle mass spectrometry to produce corresponding test spectra. The test spectra are used to determine the identities of each of the qualifying aerosol particles by comparing the test spectra against predetermined spectra for known particle types. In this manner, activation cycling in a particle-ablation laser of a single-particle mass spectrometer is reduced.