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Duhr
Alexander Duhr, Ganderkesee DE
| Patent application number | Description | Published |
|---|---|---|
| 20090159795 | DEVICE FOR THE ANALYSIS OF ISOTOPE RATIOS - A method for the analysis of isotope ratios, wherein at least one sample gas and/or at least one reference gas are supplied to at least one analytical device via at least one open split, the addition of a carrier gas also being possible. According to the invention, the concentration of the sample gas and/or reference gas passing into the analytical device is controlled by the supply of the respective carrier gas or by direct supply of the sample gas into the analytical device. In the device according to the invention for supplying gases to at least one analytical device, two or more capillaries are provided for sample gases, the capillaries in each case having their own drive for the movement between mixing zone and waiting zone. | 06-25-2009 |
| 20090314057 | METHOD AND DEVICE FOR THE ANALYSIS OF ISOTOPE RATIOS - A method for the analysis of isotope ratios, wherein at least one sample gas and/or at least one reference gas are supplied to at least one analytical device via at least one open split, the addition of a carrier gas also being possible. According to the invention, the concentration of the sample gas and/or reference gas passing into the analytical device is controlled by the supply of the respective carrier gas or by direct supply of the sample gas into the analytical device. In the device according to the invention for supplying gases to at least one analytical device, two or more capillaries are provided for sample gases, the capillaries in each case having their own drive for the movement between mixing zone and waiting zone. | 12-24-2009 |
Stefan Duhr, Munich DE
| Patent application number | Description | Published |
|---|---|---|
| 20110084218 | METHOD AND DEVICE FOR PARTICLE ANALYSIS USING THERMOPHORESIS - The present invention pertains to a device and method to measure thermo-optical, preferably thermophoretic, characteristics of particles in a solution. The method comprises the steps of: (a) providing a sample probe comprising marked particles in a solution; (b) providing a temperature control system for creating a temperature gradient within said sample probe by contact heating, electrical heating and/or cooling; (c) detecting the marked particles at a first time; (d) creating a temperature gradient within the sample probe by means of the temperature control system; (e) detecting the marked particles in the sample probe at a, preferably predetermined, second time and/or at a predetermined location within the temperature gradient, and (f) characterizing the particles based on said two detections. | 04-14-2011 |
Stefan Duhr, Munchen DE
| Patent application number | Description | Published |
|---|---|---|
| 20100044586 | FAST THERMO-OPTICAL PARTICLE CHARACTERISATION - The present invention relates to a method and an apparatus for a fast thermo-optical characterisation of particles. In particular, the present invention relates to a method and a device to measure the stability of (bio)molecules, the interaction of molecules, in particular biomolecules, with, e.g. further (bio)molecules, particularly modified (bio)molecules, particles, beads, and/or the determination of the length/size (e.g. hydrodynamic radius) of individual (bio)molecules, particles, beads and/or the determination of length/size (e.g. hydrodynamic radius). | 02-25-2010 |
| 20100330578 | THERMO-OPTICAL CHARACTERISATION OF NUCLEIC ACID MOLECULES - The present invention pertains to a method and a device for the determination of thermo-optical properties, particularly the size or size distribution, of fluorescently labeled biomolecules or biomolecule complexes, particularly nucleic acids, in a reaction solution. The method comprises the steps of: (i) providing a reaction solution with fluorescently labeled biomolecules or biomolecule complexes; (ii) irradiating a laser light beam into the solution to obtain a spatial temperature distribution in the solution around the irradiated laser light beam; (iii) exciting fluorescently said fluorescently labeled biomolecules and detecting the fluorescence at two or more defined regions representing different mean temperatures in said spatial temperature distribution, wherein said detection of fluorescence is performed at least once at a predetermined time after the start of the laser irradiation; and (iv) determining the thermo-optical properties, particularly the size or size distribution, of the fluorescently labeled biomolecules or biomolecule complexes from the detected fluorescence intensity or fluorescence intensity distribution. | 12-30-2010 |