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| Number | Title | Issue Date |
| 8188438 | Electrokinetic microfluidic flow cytometer apparatuses with differential resistive particle counting and optical sorting An electrokinetic microfluidic flow cytometer apparatus can include a substrate, a pair of signal and noise detection channels, and a particle detection circuit. The substrate includes an input port, an output port, and a microchannel that fluidly connects the input... | 05/29/2012 |
| 8058621 | Elemental composition detection system and method A system to detect a plurality of elements is proposed. The system includes one or more X-ray sources for transmitting X-rays towards a sample and also includes plurality of photon detectors. An array of crystals are arranged in a curvature with appropriate geometry... | 11/15/2011 |
| 7923692 | Radioisotope Detection Device and Methods of Radioisotope Collection A device for collection of radionuclides includes a mixture of a polymer, a fluorescent organic scintillator and a chemical extractant. A radionuclide detector system includes a collection device comprising a mixture of a polymer, a fluorescent agent and a selective... | 04/12/2011 |
| 7619222 | Automatic radioactivity analyzer of mixed liquid beta emitter The present invention relates to an automatic radioactivity analyzer of mixed liquid beta emitter which comprises: a sample preparation part (1, 2, 3, 4, 5, 6, and 7) for extracting a liquid sample from liquid-phase radioactive nuclear wastes; a sample... | 11/17/2009 |
| 7397036 | Apparatus and method for measuring the signal from a fluorescing nanodrop contained by surface tension Apparatus and method for measuring the fluorescence of nanodrop liquid samples is described in which the sample is held by surface tension between two anvil surfaces. Each anvil surface has an embedded optical fiber with its end finished flush with the surface in th... | 07/08/2008 |
| 7361509 | Dynamic metered fluid volume determination method and related apparatus A method for dynamically determining the volume of a liquid dispensed by a metering system, the metering system including a metering pump, a pump motor, a sensor, and a conduit interconnecting the pump and a metering probe. The method includes the steps of aspiratin... | 04/22/2008 |
| 7355696 | Method and apparatus for sorting cells Apparatus for sorting and orienting sperm cells has a pair or walls in confronting relationship forming a flow chamber having inlet, a downstream outlet, and intermediate detector region. The inlet receives first and second spaced apart streams of input fluid and a ... | 04/08/2008 |
| 7354553 | Method and apparatus for detecting the presence of elemental mercury in a gas sample An improved elemental mercury analyzer utilizes a fluorescence assembly in combination with a fluorescence quenching reduction mechanism to detect the concentration of elemental mercury within an emission gas sample, via fluorescence of the mercury within the gas sa... | 04/08/2008 |
| 7332723 | Variable gain imaging An apparatus may include a scintillator to emit light, imaging elements to capture image information based on received light, and an optical filter disposed between the scintillator and the imaging elements, wherein an opacity of the optical filter is controllable. | 02/19/2008 |
| 7316166 | Method and system for analyzing multi-phase mixtures A method and apparatus is disclosed for identifying changes in composition in a flow containing an oil/hydrocarbon gas fluid mixture, including a measurement of the respective holdups of any two of the gas, oil and water; and measurements to determine attenuation or... | 01/08/2008 |
| 7206376 | Fluid density measurement A wellbore tool for measuring the density of a fluid flowing in a wellbore by a photon attenuation technique includes a tube defining a flow path for the fluid, a photon source at one end of the tube, and a photon detector arranged to receive photons which have pass... | 04/17/2007 |
| 7199375 | Radiation shielding container that encloses a vial of one or more radioactive seeds An apparatus in one example comprises a vial that comprises a vial bottom and a vial cap that connect to enclose one or more radioactive seeds; and a radiation shielding container that comprises a bottom portion and a top portion that connect to enclose the vial. Th... | 04/03/2007 |
| 7189975 | Wire-free, dual-mode calibration instrument for high energy therapeutic radiation An instrument for checking quality of therapeutic x-ray and electron radiation provides modes optimized for both electrons and for photons obtained by physically flipping the unit to interpose the necessary build-up material between the radiation beam and contained ... | 03/13/2007 |
| 7146084 | Fiber optic light source for display devices A light source includes at least one optical fiber having a length and first and second ends and at least one electromagnetic wave source disposed along at least a portion of the length of the fiber for transmitting electromagnetic waves through a side surface of th... | 12/05/2006 |
| 7108659 | Respiratory analyzer for exercise use A respiratory analyzer comprises a flow module, having a flow tube through which the flow rate of gases is determined using a flow rate meter, and a computation module, in communication with the flow module, operable to determine a flow rate of respired gases. The c... | 09/19/2006 |
| 7110493 | X-ray detector system having low Z material panel A method and apparatus for detecting concealed items on or in an object by utilizing a low Z material panel. The object to be scanned is located between an x-ray detector and the low Z material panel. The method includes producing a pencil beam of x-rays from an x-r... | 09/19/2006 |
| 7105832 | Composite solid-state scintillators for neutron detection Applicant's present invention is a composite scintillator for neutron detection comprising a matrix material fabricated from an inorganic sol-gel precursor solution homogeneously doped with a liquid scintillating material and a neutron absorbing material. The neutro... | 09/12/2006 |
| 7043129 | Wide bandgap semiconductor waveguide structures A waveguide structure for transmitting broad spectrum light, includes a wide bandgap semiconductor thin film arranged on a substrate and ablated to form a waveguide channel to transmit the broad spectrum light. ... | 05/09/2006 |
| 6955650 | Metabolic calorimeter employing respiratory gas analysis An indirect calorimeter for measuring the metabolic rate of a subject includes a respiratory connector configured to be supported in contact with the subject so as to pass inhaled and exhaled gases as the subject breathes, a flow pathway, and a hygiene barrier posit... | 10/18/2005 |
| 6953937 | Method and apparatus for the detection of neutrons and gamma rays A pulse discrimination method for discriminating between pulses having a short decay period and a long decay period, may comprise: Detecting the pulse; integrating a rise portion of the pulse; integrating a decay portion of the pulse; and comparing the integrated ri... | 10/11/2005 |
| 6855270 | Nanoscintillation systems for aqueous-based liquid scintillation counting The present invention relates to the use of nanoscintillation systems, or nanoparticles containing fluor molecules, that can be used to detect an electron-emitting or alpha-particle-emitting radioisotope in the absence of organic-solvents commonly used in organic-ba... | 02/15/2005 |
| 6700125 | Radioactive dust monitor A radioactive dust monitor comprising a dust collecting electrode serving also as a radiation detecting surface, an ionization line extending in air in a spaced relation with the dust collecting electrode and a radiation detection part. The radiation dete... | 03/02/2004 |
| 6674082 | Monitoring emissions The method and apparatus provide a technique for monitoring radioactive source emissions by detecting photons arising from scintillation within the environment of the area or item under monitoring, caused by the passage of emissions from the radioactive s... | 01/06/2004 |
| 6492642 | Method for identifying radionuclides in probes using a liquid scintillation sensor The invention relates to the field of radio-ecological monitoring, in particular to a method for measuring the content of radionuclides in components of the environment. The technical result is enhancement of the sensitivity of liquid scintillation analys... | 12/10/2002 |
| 6303936 | Extraction-scintillation medium and method of use An extraction-scintillation medium of substantially free-flowing, porous, solid particulate matter having one or more fluors retained within the particulate matter and an extraction agent adsorbed on or bound to the surface of the particulate matter. The ... | 10/16/2001 |
| 6229146 | Position sensitive radioactivity detection for gas and liquid chromatography A method and apparatus are provided for the position sensitive detection of radioactivity in a fluid stream, particularly in the effluent fluid stream from a gas or liquid chromatographic instrument. The invention represents a significant advance in effic... | 05/08/2001 |
| 6139749 | Method for radioactive species analysis using a self-scintillating sheet material A method for separation, identification, and quantification of radioactive species in an environmental fluid, such as surface or ground water, by passing the fluid through a sheet article. The sheet article is an essentially homogenous, fibrous or fibrill... | 10/31/2000 |
| 5952238 | Method of assaying specimen substance by controlling dose of chemiluminescence A method for assay of an analyte by use of a material labeled with a chemiluminescent substance, which comprises adding a quencher and/or decreasing the specific activity of a chemiluminescent substance labeled probe, thereby decreasing the quantity of ch... | 09/14/1999 |
| 5952655 | Ultra-high sensitivity radiation detection apparatus and method A method and apparatus are provided to concentrate and detect very low levels of radioactive noble gases from the atmosphere. More specifically the invention provides a method and apparatus to concentrate xenon, krypton and radon in an organic fluid and t... | 09/14/1999 |
| 5856670 | Continuous sample detector with multiple cells A continuous sample detector has a cell assembly with a spaced pair of sample cells. Each of these cells is mounted in a sample chamber and each is adapted to conduct a continuous sample flow. These sample cells are connected through a plurality of sample... | 01/05/1999 |
| 5793046 | Active cladding scintillating-fiber radiation detector A scintillating optical fiber sensitive to low energy radiation has a clear, solid, elongated core with a thin cladding layer surrounding substantially all of the core along substantially all the length of the core and a dye dopant dispersed within the th... | 08/11/1998 |
| 5783828 | Apparatus and method for tritium measurement by gas scintillation The present invention relates to an apparatus and a method for measuring tritium specific activity by gas scintillation. The specific activity is measured when the tritium is mixed in carrier streams of certain gases which serve as scintillation detection... | 07/21/1998 |
| 5726452 | Cell for the analysis of radioactive liquids by an overhanging detector Cell, whose interior (3) is filled with liquid, whose radioactivity is measured by a scintillator or other detector install thereon. The invention consists of equipping the cell with rinsing means in order to wash the cell side wall (2) and the sealing or... | 03/10/1998 |
| 5559324 | Continuous sample detector with standard A continuous sample detector includes a sample chamber, a cell body and one or more standard sources of radiation. Mounted in the sample chamber, the cell body has a cell, a coil of transparent tubing through which the sample solution continuously passes ... | 09/24/1996 |
| 5483070 | Scintillation counter A scintillation measurement system for measuring optical events produced by scintillators in response to the radioactive decay of a constituent or constituents of a sample to be measured comprises a sample support for positioning a sample in a sample well... | 01/09/1996 |
| 5449921 | Method and apparatus for determining ଲ-ray emitters A method and apparatus for determining ଲ-ray emitters to determine radioactivity of tritium with a high sensitivity and without contamination of a radiation recording plate with radioactivity, wherein a plastic microplate is provided having a number... | 09/12/1995 |
| 5416329 | Apparatus for counting liquid scintillation samples A device for counting liquid scintillation samples which can count a single sample or several samples simultaneously. A transport system moves samples from a storage section to a counting section. The samples are placed on sample plate holders to assist t... | 05/16/1995 |
| 5412216 | Method and apparatus for identifying a radionuclide in a liquid scintillation sample Methods and apparatus are provided for identifying a radionuclide in a liquid sample containing at least one unknown radionuclide, in which specific properties which are essentially linear over extended quench ranges are employed as the primary basis for ... | 05/02/1995 |
| 5410155 | Scintillation counting medium and process A liquid scintillation medium for homogeneous flow systems which comprises solvent, fluor and optionally surfactant, wherein the solvent comprises benzyltoluene. The solvent may comprise the positional isomers of benzyltoluene, and other solvents such as ... | 04/25/1995 |
| 5367170 | Method for measuring samples with liquid scintillation counting and a counter A method and a liquid scintillation counter for measuring a sample, a mixture of the specimen to be analysed and a scintillator, in a liquid scintillation counter where the sample (14) is measured with two photo multiplier tubes (23, 24) situated on diffe... | 11/22/1994 |
