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Amirav
Aviv Amirav, Hod Hasharon IL
| Patent application number | Description | Published |
|---|---|---|
| 20080302959 | PULSED FLOW MODULATION GAS CHROMATOGRAPHY MASS SPECTROMETRY WITH SUPERSONIC MOLECULAR BEAMS METHOD AND APPARATUS - There is provided a pulsed flow modulation gas chromatograph mass spectrometer with supersonic molecular beams apparatus and method for improved sample analysis. The apparatus includes a gas chromatograph with an injector for the analysis of sample compounds, a first analytical column in the gas chromatograph, a sample storage, a gas pulse generator, a pressure generator, a conduit for transferring the sample compounds into a second analytical column having a different polarity than the polarity of the first analytical column, a second gas pulse generator, a transfer line for transferring the sample compounds into a supersonic nozzle, a member for adding a makeup gas to the output gas flow of the second analytical column before the supersonic nozzle, an element for reducing the flow rate of the added makeup gas, a supersonic nozzle for the expansion of the sample with the combined second analytical column and added makeup gas, a fly-through electron ionization ion source, a mass analyzer, an ion detector for the detection of the ions of the sample compounds after their mass analysis, a data processor and presenter, and a repeater for repeating the cycle of the first gas pulse of relatively high flow rate followed by the second gas pulse of intermediate flow rate. | 12-11-2008 |
| 20090101814 | CAPILLARY SEPARATED VAPORIZATION CHAMBER AND NOZZLE DEVICE AND METHOD - There is provided a capillary separated vaporization chamber and nozzle method and device for improved electron ionization liquid chromatography mass spectrometry of samples in a supersonic molecular beam. The device includes a vaporization chamber located upstream of a supersonic nozzle; a capillary separating the vaporization chamber and the supersonic nozzle, means for spray formation from sample in a flowing liquid; a vacuum system into which the supersonic nozzle induces supersonic expansion of the vaporized sample compounds and solvent vapor, for forming a supersonic molecular beam with vibrationally cold sample molecules and vaporized solvent; flythrough electron ionization ion source; mass analyzer; an ion detector and means for data processing of the resulting mass spectral information, for identifying and/or quantifying the chemical content of the sample. | 04-23-2009 |
| 20100019140 | OPEN PROBE METHOD AND DEVICE FOR SAMPLE INTRODUCTION FOR MASS SPECTROMETRY ANALYSIS - An open probe method for sample introduction into a mass spectrometer is disclosed, comprising the steps of: loading a sample holder with sample compounds to be analyzed; heating a probe oven; introducing said sample compounds in said sample holder into said heated probe oven; flowing inert gas into said heated probe oven; vaporizing said sample in said heated probe oven by the combined effect of oven temperature and inert gas flow; entraining said vaporized sample in said inert gas; and, transferring said vaporized sample in inert gas into an ion source of a mass spectrometer; wherein said heated probe oven remains open to the ambient atmosphere during sample introduction and analysis; said inert gas is flowing in said heated probe oven in two directions of a transfer line to a mass spectrometer ion source and to the oven opening; said vaporized sample in inert gas is transferred through a heated transfer line directly into the ionization chamber of an ion source of a mass spectrometer. An apparatus for this method of sample introduction is also disclosed. The primary advantage of this method and apparatus is that the heated probe oven remains open to the ambient atmosphere during sample introduction and analysis thereby enabling faster sample analysis. | 01-28-2010 |
Iri Amirav, Tel-Aviv IL
| Patent application number | Description | Published |
|---|---|---|
| 20110004588 | METHOD FOR ENHANCING THE PERFORMANCE OF A MEDICAL SEARCH ENGINE BASED ON SEMANTIC ANALYSIS AND USER FEEDBACK - Method for enhancing the performance of a medical search engine, including the procedures of generating an inverted index of medical related documents, receiving a medical search query from a user, expanding and augmenting the received medical search query thereby generating an enhanced medical search query, retrieving all the medical related documents in the inverted index which are relevant to the enhanced medical search query, ranking the retrieved medical related documents according to a master expression, presenting the ranked retrieved medical related documents to the user, receiving at least one user feedback response from the user to a respective one of the ranked retrieved medical related documents, for each received user feedback response evaluating and storing at least one feature of the respective one of the ranked retrieved medical related documents and modifying the master expression based on the received user feedback response using at least one machine learning algorithm. | 01-06-2011 |
Lilac Amirav, Hod Hasharon IL
| Patent application number | Description | Published |
|---|---|---|
| 20080296534 | Core-Alloyed Shell Semiconductor Nanocrystals - The invention relates to a core-alloyed shell semiconductor nanocrystal comprising: (i) a core of a semiconductor material having a selected band gap energy; (ii) a core-overcoating shell consisting of one or more layers comprised of an alloy of the said semiconductor of (i) and a second semiconductor; (iii) and an outer organic ligand layer, provided that the core semiconductor material is not HgTe. Preferably, the core semiconductor material is PbSe and the alloy shell semiconductor material has the PbSexS1-x structure. | 12-04-2008 |
| 20090263956 | Spray method for producing semiconductor nano-particles - A method is provided for producing semiconductor nanoparticles comprising: (i) dissolving a semiconductor compound or mixture of semiconductor compounds in a solution; (ii) generating spray droplets of the resulting solution of semiconductor compound(s); (iii) vaporizing the solvent of said spray droplets, consequently producing a stream of unsupported semiconductor nanoparticles; and (iv) collecting said unsupported semiconductor nanoparticles on a support. | 10-22-2009 |
| 20110006285 | CORE-ALLOYED SHELL SEMICONDUCTOR NANOCRYSTALS - The invention relates to a core-alloyed shell semiconductor nanocrystal comprising: (i) a core of a semiconductor material having a selected band gap energy; (ii) a core-overcoating shell consisting of one or more layers comprised of an alloy of the said semiconductor of (i) and a second semiconductor; (iii) and an outer organic ligand layer, provided that the core semiconductor material is not HgTe. In certain embodiments, the core semiconductor material is PbSe and the alloy shell semiconductor material has the PbSe | 01-13-2011 |