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Dukhin
Andrei Dukhin, Goldens Bridge, NY US
| Patent application number | Description | Published |
|---|---|---|
| 20110012627 | Method for determining porosity with high frequency conductivity measurement - Propagation of ultrasound through a porous body saturated with liquid generates electric response. | 01-20-2011 |
Andrei Dukhin, Bedford Hills, NY US
| Patent application number | Description | Published |
|---|---|---|
| 20110283800 | Method for determining porosity, pore size and zeta potential of porous bodies - Propagation of ultrasound through a porous body saturated with liquid generates electric response. This electro-acoustic effect is called “seismoelectric current”, whereas reverse version, when electric field is driving force, is “electroseismic current”. It is possible to measure seismoelectric current with existing electro-acoustic devices, which had been designed for characterizing liquid dispersions. Such versatility allows calibration of said devise using dispersion and then applying it for characterizing porous body. In general, magnitude of seismoelectric current depends on porosity, pore size, zeta potential of pore surfaces and elastic properties of matrix. It is possible to adjust conductivity of liquid for simplifying these dependences. For instance, liquid with high ionic strength causes double layers become thin comparing to the pore size, which eliminates dependence of said currents on pore size. We suggest using such case for characterizing porosity. Magnitude of the said currents is proportional to zeta potential. This parameter can be calculated when porosity is known. In contrary, saturation of porous body with low conducting liquid leads to complete overlap of double layers, which can be used for characterizing pore size. Phase of the said currents can be used for determining iso-electric point because it rotates 180 degrees when liquid composition varies through this point. | 11-24-2011 |
Stanislav Dukhin, Goldens Bridge, NY US
| Patent application number | Description | Published |
|---|---|---|
| 20090293719 | FRACTAL STRUCTURED NANOAGGLOMERATES AS FILTER MEDIA - Systems and methods for achieving filtration are provided that utilize agglomerates or granules of nanoparticles. The agglomerates or granules of nanoparticles may be used as and/or incorporated into a HEPA filtration system to remove solid or liquid submicron-sized particles, e.g., MPPS, in an efficient and efficacious manner. The filtration systems and methods are provided that utilize agglomerates or granules in a size range of about 100-500 microns. The agglomerates or granules of nanoparticles exhibit a hierarchical fractal structure. In the case of agglomerates of nanoparticles, porosities of 0.9 or greater are generally employed, and for granules of nanoparticles, porosities that are smaller than 0.9 may be employed. Filter media formed from the agglomerates or granules may be formed from materials such as carbon black and fumed silica, and may be employed in baffled or non-baffled filtration apparatus. | 12-03-2009 |
Stanislav S. Dukhin, Goldens Bridge, NY US
| Patent application number | Description | Published |
|---|---|---|
| 20100078046 | Apparatus and method for cleaning passageways such as endoscope channels using flow of liquid and gas - Apparatus and methods are disclosed for cleaning interiors of passageways in endoscopes or other luminal medical devices by flow of liquid and gas therethrough. The liquid flow may include rivulets, droplets or other liquid entities which move on the internal surfaces of the passageways, and may include a three-phase contact interface between liquid and dry solid and gas. | 04-01-2010 |
| 20100078047 | Method and composition for cleaning tubular systems employing moving three-phase contact lines - A method, composition and apparatus for cleaning an internal surface of a narrow diameter channel. The method includes: | 04-01-2010 |