Entries |
Document | Title | Date |
20090137056 | METHODS FOR DETECTING DIHYDROXYVITAMIN D METABOLITES BY MASS SPECTROMETRY - Provided are methods of detecting the presence or amount of a dihydroxyvitamin in D metabolite in a sample using mass spectrometry. The methods generally comprise ionizing a dihydroxyvitamin D metabolite in a sample and detecting the amount of the ion to determine the presence or amount of the vitamin D metabolite in the sample. In certain preferred embodiments the methods include immunopurifying the dihydroxyvitamin D metabolites prior to mass spectrometry. Also provided are methods to detect the presence or amount of two or more dihydroxyvitamin D metabolites in a single assay. | 05-28-2009 |
20090137057 | LUMINESCENT DIKETONATE POLYMERS - The present invention provides in one aspect polymeric luminescent dye compounds having fluorescent properties, phosphorescent properties, or both fluorescent and phosphorescent properties. | 05-28-2009 |
20090221083 | Selective Aliphatic C-H Oxidation - A composition including a complex of a metal, a tetradentate ligand, at least one ancillary ligand, and a counterion may be used for selective sp | 09-03-2009 |
20100105146 | Apparatus and Method for Measuring Water Quality in a Water Distribution System - A system for monitoring water quality in a water distribution system having a plurality of metering end points (E) for measuring consumption includes a plurality of chemical biological and environmental sensors (S | 04-29-2010 |
20100203649 | OPTOCHEMICAL SENSOR ELEMENT - An optochemical sensor element | 08-12-2010 |
20110091982 | Detection and Quantification of Anions - Provided herein are methods of detecting anions in solution. In particular, the methods can be used to detect trace anions in solution. For example, the anions can be present in an amount of between about 500 femtomoles to about 10 millimoles. | 04-21-2011 |
20120021526 | METHOD FOR ANALYSIS OF ISOTOPES IN BODILY FLUIDS - Biological fluid samples containing proteins (e.g., blood plasma or saliva) are prepared for isotopic analysis by precipitating the proteins while leaving the isotopic ratio unaffected. This precipitation can involve adding metal ions, salts, organic solvents, or organic polymers. The sample is then centrifuged to allow transfer of the supernatant for isotopic analysis, e.g. by tunable diode laser absorption spectrometry to obtain a quantitative measure of the | 01-26-2012 |
20120028364 | Stop-Flow Analytical Systems and Methods - Analytical systems and methods are provided for simultaneously dispensing metered volumes of fluids at different rates and mixing the fluids to generate a mixed sample having the fluids in proportion to the different rates at which they were dispensed. In some cases two or more of the fluids are premixed prior to mixing with other fluids. In some cases a use composition and diluent are simultaneously dispensed at different rates and premixed to form a diluted sample. One or more reagents may be mixed with the diluted sample and the sample mixture can be analyzed to determine characteristics of the use composition. | 02-02-2012 |
20120276650 | METHOD FOR DETERMINING TURBIDITY POINT AND FREE CARBOHYDRATE BUFFER COEFFICIENT OF IRON-CARBOHYDRATE COMPLEX - A method for determining a turbidity point and a free carbohydrate buffer coefficient of an iron-carbohydrate complex. The method includes: (1) contacting the complex with an acid; (2) determining hydrogen ion concentrations and solution turbidities of the complex in acid degradation; and (3) mathematically fitting the data, to obtain the turbidity point of the complex and the free carbohydrate buffer coefficient through mathematical treatment. A method for evaluating the safety of the iron-carbohydrate complex with the turbidity point and the free carbohydrate buffer coefficient. | 11-01-2012 |
20140134746 | BIPHENOL ETHER COMPOUNDS AS MARKERS FOR LIQUID HYDROCARBONS AND OTHER FUELS AND OILS - A method for marking a petroleum hydrocarbon or a liquid biologically derived fuel by adding to the petroleum hydrocarbon or liquid biologically derived fuel at least one compound having formula (I), | 05-15-2014 |
20140302613 | MEANS FOR DETECTING OXYGEN FREE RADICALS IN HUMAN BODY - A means for detecting active oxygen in the human body, which quantitatively detects the amount of active oxygen remaining in the body by applying urine to a detection paper, and is characterized by providing a means for detecting active oxygen in the human body, which detects the amount of active oxygen by submerging a test strip into urine, on which has been applied a color indicating agent that changes color by reacting with malondialdehyde (MDA) and to which has been coupled a support stick, and observing color change. The present invention can affordably and simply identify active oxygen, because the test strip changes color when simply wetted with urine and the test does not require additional technically skilled laboratory staff or expensive equipment. Also, the invention enables simple testing regardless of time and space since a specific facility is unnecessary for the test, thereby providing another advantage of general usage. | 10-09-2014 |
20160069849 | OXOANION CONCENTRATION DETERMINATION USING ALUMINUM REAGENTS - To determine the concentration of an oxoanion in an aqueous solution, an aluminum reagent is added to the aqueous solution to form an optical analysis solution. Addition of the aluminum reagent may or may not form an alumino-oxoanion hydroxide hydrate precipitate. Light is directed into the optical analysis solution to determine an optical response of the optical analysis solution. Thereafter, the concentration of the oxoanion in the aqueous solution is determined based on the optical response of the optical analysis solution. For example, the concentration of the oxoanion may be calculated using a molar ratio relating oxoanion concentration to aluminum reagent concentration, when the aluminum reagent concentration corresponds to an inflection point of the optical response of the optical analysis solution. | 03-10-2016 |