Abstract: An optochemical sensor comprises a measuring element excitable by the light of an excitation light source and in contact with a medium to be measured, and a measuring arrangement including at least one excitation light source and a detector as well as a hood separating the measuring arrangement from the measuring element, wherein the excitation light source and the detector are fixed to a base plate arranged in parallel with the measuring element, the hood, the excitation light source and the detector are separated from one another by at least a portion of the material thickness of the hood, and light from the excitation light source through an optical waveguide impinges on the measuring element at such an angle that fluorescence light emitted by the measuring element impinges perpendicularly on the detector.

Abstract: A method for the non-invasive measurement of the gas content of at least one gas selected from O2, CO2, amines, nitrogen oxides, sulfur compounds, in transparent packages made of plastic films, glass or other light-permeable materials, in which a sensor material sensitive to the gas content in the interior of the package is excited by excitation light incident thereon to emit a fluorescent or luminescent light, the emitted fluorescent or luminescent light is detected in a detection device interacting with the sensor, whereupon the packaged materials or produced materials are subjected to sorting, and optionally counting, as a function of the gas content determined by an evaluation unit coupled to the detection device, comprising the steps of: a) optionally deep-drawing the package; b) applying a sensor material to the inner side of a cover for the package, or to the inner side of the package, and optionally drying the sensor material; c) introducing into the package the materials to be packaged; d) gas-tightl

Abstract: An optochemical sensor comprises a measuring element excitable by the light of an excitation light source and in contact with a medium to be measured, and a measuring arrangement including at least one excitation light source and a detector as well as a hood separating the measuring arrangement from the measuring element, wherein the excitation light source and the detector are fixed to a base plate arranged in parallel with the measuring element, the hood, the excitation light source and the detector are separated from one another by at least a portion of the material thickness of the hood, and light from the excitation light source through an optical waveguide impinges on the measuring element at such an angle that fluorescence light emitted by the measuring element impinges perpendicularly on the detector.

Abstract: The invention relates to an optochemical sensor comprising a polymer matrix which is applied to a substrate and which is doped with a luminescent colorant, the emissivity of which can be modified after excitation with electromagnetic radiation by substances to be detected such as gaseous or dissolved O2, SO2, H2O2, CO2, nitrogen oxides and halogenated hydrocarbons, which polymer matrix forms a sensor layer that is also covered by an optical insulating and protective layer which can be permeated by the substance to be analysed. In the optochemical sensor, the sensor layer is formed from a layer which has an insular sensor element or a plurality of mutually separated sensor elements, the at least one sensor element being covered by a non-doped polymer matrix which chemically corresponds to the polymer matrix of the sensor layer.

Abstract: The present invention relates to the use of recombinant heme-containing horseradish peroxidase isoenzyme with improved technological properties such as altered glycosylation, improved catalytic properties or improved stability and different ranges of pH optima and improved surface interactions in the treatment of waste water.

Abstract: In a method and a device for determining the fluorescence of a sample, wherein the sample (40) is irradiated by light (25) of a wavelength which is suitable to excite fluorescent light (27, 28) in the sample and the fluorescent light (28) emitted by the sample is received in a receiver (24) and converted into a measurement signal, wherein reference light (32) in particular for compensating for ambient influences is additionally fed to the receiver (24) and likewise converted into a reference measurement signal, provision is made for the optical path of the excitation light (25) entering the sample (40) and fluorescent light (27, 28) leaving the sample (40) to be separated from the optical path (32) of the reference light having the same wavelength as the excitation light between light sources (21, 31) and receiver (24), by means of which a more precise evaluation of the fluorescent light emitted by a sample (40) can be achieved in addition to a simplified design complexity.

Abstract: The present invention provides a method for producing beer comprising filtering beer through a porous membrane until such time that the porous membrane is in need of cleaning, contacting the porous membrane with an enzyme selected from the group consisting of cellulases, amylases, and combinations thereof, particularly a cellulase having a crystalline:soluble cellulose activity ratio at 60 minutes of at least about 0.1, to clean the porous membrane, and then reusing the porous membrane to continue filtering beer.