Kataja
Aulis Kataja, Tampere FI
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20100000797 | DRILLING TOOL - The invention relates to a drilling tool for drilling soft and fragmented rock. The drilling tool disclosed in the invention comprises a portion having a round cross section and a smooth surface and positioned substantially symmetrically relative to the middle axis of a drill rod and comprising, at its end, a converging part through which conduits pass for rinsing medium. | 01-07-2010 |
Jari Kataja, Lahti FI
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20150201473 | METHOD AND CONVERTER FOR SUPPLYING CURRENT TO SERIES CONNECTION OF LEDS - The present disclosure describes a boost converter for supplying current to a series connection of light-emitting diodes (LEDs). A duty ratio of the main switch of the converter is configured to be controlled on the basis of a current feedback signal. The current feedback signal is formed as a weighted average of at least two signals including a first signal representing the current through the series connection of LEDs and a second signal representing a current through the main switch. | 07-16-2015 |
Kari Kataja, Oulu FI
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20100284005 | SPECTROMETER FOR MEASURING MOVING SAMPLE MATERIAL AND THE METHOD - An optical or infrared spectrometer is suitable for on-line measurements for industrial, agricultural, field, commercial and other applications. Optical spectrometers are very useful for various analytical measurements. On-line operation is needed for obtaining real-time information, which is useful e.g. for process automation and quality control needs. The invention is based on optical design optimized for measuring moving samples at a distance and includes a light guide for signal homogenization, a linear variable filter for defining multiple measurement wavelengths as well as a linear detector array for detecting optical signals relating to the different wavelengths. There is an element for cooling and stabilizing the operating temperature of both the linear detector array and the linear variable filter, while the spectrometer is operating in variable environmental conditions. Thanks to the optical signal chain designed to maximize the radiance at the detector, the proposed spectrometer can provide high signal-to-noise ratio and high speed. | 11-11-2010 |
Kari Kataja, Espoo FI
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20080233591 | METHOD AND TEST KIT FOR QUANTITATIVE DETERMINATION OF POLYNUCLEOTIDES IN A MIXTURE - The invention relates to a method and test kit for quantitative determination of the amounts or relative proportions of polynucleotides in a mixture. The invention enables assessment of dynamic variations in a mixed population of organisms using affinity aided solution hybridization. The test kit comprises organized pools of polynucleotide probes having approximately the same number of nucleotides, which are distinguishable using resolution enabling tags providing the probes with different sizes. The resolution enabling tags may simultaneously act as tracer, affinity or primer tags. The probes are allowed to hybridize with affinity tagged analyte polynucleotides. The result is hybrids, recoverable on separation aiding tools provided with counterparts of the affinity tag. After the quantitative release of the probes, the individual probes can be amplified and recorded. The method and test kit are useful for determining hygienic and epidemiologic situations and evaluating the effect of antibiotic treatment and sanitary measures. | 09-25-2008 |
20090269767 | MICROFLUIDIC CHIP DEVICES AND THEIR USE - A microfluidic chip device (MCD) and its use for performing miniaturized assays on magnetic microbeads (MMs) are described. The MCD is particularly useful for carrying out miniaturized transcript analysis by aiding affinity capturing (TRAC) assays, including PCR. The MCD comprises at least one reaction chamber with sealable liquid connections and at least one fluidic pillar filter in each chamber. The fluidic pillar filter comprises rods with spacings allowing MMs to pass. The sealable liquid connections feed liquid to the reaction chamber, wherein air bubbles are removed. The liquid stream contacts the MMs, which are manipulated with a magnetic rod. The liquid connections enable trapping of the MMs behind the pillar filters or in the channel, while the liquid is changed. | 10-29-2009 |
Kirsi Kataja, Espoo FI
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20100209725 | METHOD OF MODIFYING PAPER AND CARDBOARD - A fibrous product, the absorption and desorption properties of which have been improved and which comprises a fibrous substrate which has, on at least one of it surfaces, a small quantity of a modified starch, and a method of producing it. According to the present invention, onto at least one surface of the fibrous product is applied 0.01-1.0 g/m | 08-19-2010 |
20120227633 | MATERIAL TO BE USED AS A CONCRETE ADDITIVE - The invention relates to an admixture for a cementitious composition comprising microfibrillar cellulose and/or a derivative thereof. The invention also relates to a method of manufacturing said admixture and to the use of the microfibrillar cellulose and/or a derivative thereof in the concrete admixture. The invention further relates to a cementitious composition comprising said admixture and methods of manufacture and use thereof. | 09-13-2012 |
Kirsi Kataja, Helsinki FI
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20090255441 | Starch-Based Filler and Coating Pigment Composition for Fibre Webs and Method for the Manufacture Thereof - A material which is suitable as filler or coating pigment for a fibrous web and a method for manufacturing thereof. According to the method, a feed comprising organic polymer material is cooled to at least approximately −50° C., after which it is refined in a jet refiner to a desired particle size. The present invention generates uniform pigment particles which comprise, for instance, starch esters, and which particles have a porous surface structure, in which case they are suitable for instance as coating pigments and fillers for offset and ink-jet papers. | 10-15-2009 |