Pall Corporation

Joanneum Research Forschungsgesellschaft Mbh

Tecsense Gmbh

Montanuniversitat Leoben

Universität Graz

Univerza V Mariboru Fakulteta Za Strojnistvo

Dataphysics Instruments Gmbh

Volker Ribitsch

Peter J Degen

Wolfgang Kern

Horst Randhahn

Gilbert Moser

Johannes Krottmaier

Alessandro Bizzarri

Christian Konrad

Thomas Grießer

Diter Pelz

Walter Serro

Gerald Zanker

Tamilselvan Mohan

Ursula Zaismann

Karin Stana Kleinschek

Rupert Kargl

Stefan Spirk

Martin Tscherner

Lunjakorn Amornkitbamrung

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.

Optochemical sensor

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

Method and device for determining the fluorescence of a sample and use thereof

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. The present invention further provides a method for producing beer comprising filtering beer through a porous membrane that progressively clogs during filtration, monitoring the streaming or zeta potential of the porous membrane as a measure of the extent of clogging of the porous membrane, halting filtration of the beer through the porous membrane before the porous membrane becomes fully clogged as determined by the streaming or zeta potential of the porous membrane, cleaning the porous membrane, and then reusing the porous membrane to continue filtering beer.

Method for producing beer

Growing community of inventors

Graz, Austria

Volker Ribitsch