Abstract: The present disclosure concerns a measuring probe (10) for non-invasive in vivo measurement of blood analytes (33) by Raman spectroscopy. The measuring probe (10) comprises a housing (20) having a skin engaging surface (21). The housing (20) comprises a first optical system (1, 3, 4) arranged for providing source light (11) to the skin engaging surface (21) for penetrating a subject's skin (31) by said source light (11) for interacting with the blood analytes (33). The housing (20) further comprises a second optical system (5, 6, 2) arranged for capturing scattered Raman light (12) from the blood analytes (33) for measurement of the blood analytes (33). The first optical system (1, 3, 4) is arranged for providing the source light (11) as a collimated beam (1c) onto the skin (31).

Abstract: The present invention relates to an optical H+-sensor, comprising an H+-indicator material, wherein the H+-indicator material is present between a support material and a H+-permeable layered structure, the layered structure comprising an H+-permeable hydrophilic layer and an H+-permeable cation exchange layer. Further, the invention relates to a method for determining the H+-concentration, e.g. expressed as pH, in a product or sample thereof, the method comprising contacting the product or sample with an optical H+-sensor according to the invention, measuring an optical property of the indicator material, and determining the H+-concentration of the product or sample based on said optical property.

Abstract: Methods are provided for determining whether a chicken egg, or a chicken egg pool, belongs to a class of organic chicken eggs. The yolk scyllo-inositol and myo-inositol concentrations, or concentration-related signals or values, are measured and the ratio between the scyllo-inositol concentration or concentration-related signal or value and the myo-inositol concentration or concentration-related signal or value is determined.

Abstract: The present disclosure concerns a measuring probe (10) for non-invasive in vivo measurement of blood analytes (33) by Raman spectroscopy. The measuring probe (10) comprises a housing (20) having a skin engaging surface (21). The housing (20) comprises a first optical system (1, 3, 4) arranged for providing source light (11) to the skin engaging surface (21) for penetrating a subject's skin (31) by said source light (11) for interacting with the blood analytes (33). The housing (20) further comprises a second optical system (5, 6, 2) arranged for capturing scattered Raman light (12) from the blood analytes (33) for measurement of the blood analytes (33). The first optical system (1, 3, 4) is arranged for providing the source light (11) as a collimated beam (1c) onto the skin (31).

Abstract: Method for detecting one or more elements of the periodic system of elements, in particular one or more metal ions, in a fluid using LASER induced breakdown spectroscopy (LIBS), the method comprising (a) contacting a sample of the fluid with a surface comprising chelating groups bound to a surface of a solid element-extraction product the chelating group having specific binding affinity for one or more elements to be detected; (b) allowing said one or one or more elements present in the fluid to chelate with the chelating groups; (c) removing the fluid from the solid element-extraction product whilst the one or more elements chelated to the chelating groups remain chelated; thereafter (d) using the solid element-extraction product for a detection specimen, whilst the chelated element or elements remain chelated; (e) and subjecting the detection specimen to LIBS, under conditions that allow detection of the one or more elements chelated to the chelating groups.

Abstract: The invention provides novel markers for classifying the housing systems of eggs. Classification methods as well as kits of parts using these novel markers are also herewith provided.

Abstract: This invention relates to inducible release vehicle comprised of crosslinked carbohydrates or proteins and an active ingredient. The release is induced by an external stimulus, e.g. an enzyme such as amylase. Such a vehicle can particularly be used in an applications for preventing microbial decay or combating microbial infections. Other uses are for oral applications such as providing anti-caries or flavoring compounds and for pharmaceutical and/or nutraceutical applications.

Abstract: The present invention relates to an optical H+-sensor, comprising an H+-indicator material, wherein the H+-indicator material is present between a support material and a H+-permeable layered structure, the layered structure comprising an H+-permeable hydrophilic layer and an H+-permeable cation exchange layer. Further, the invention relates to a method for determining the H+-concentration, e.g. expressed as pH, in a product or sample thereof, the method comprising contacting the product or sample with an optical H+-sensor according to the invention, measuring an optical property of the indicator material, and determining the H+-concentration of the product or sample based on said optical property.

Abstract: The invention relates to a light emitting diode having at least one (semi)conductive electroluminescent active layer which comprises at least two different electroluminescent functionalities, wherein the emission spectrum of the diode exhibits at least two intensity maxima. The invention further relates to a detector which comprises a light emitting diode which is capable of emitting light at least two mutually separate intensity maxima.

Abstract: This invention relates to inducible release vehicle comprised of crosslinked carbohydrates or proteins and an active ingredient. The release is induced by an external stimulus, e.g. an enzyme such as amylase. Such a vehicle can particularly be used in an applications for preventing microbial decay or combating microbial infections. Other uses are for oral applications such as providing anti-caries or flavoring compounds and for pharmaceutical and/or nutraceutical applications.

Abstract: The present invention relates to a method for detecting a contamination with a microorganism in a closed container, in which an extracellular enzyme of the microorganism is detected. The method can very suitably be carried out by providing a substrate for this enzyme to the contents of the container and detecting the conversion of this substrate by this enzyme. An embodiment of an apparatus according to the invention is shown in, which shows a container (1) for, for instance, sterile tissue culture of plants (2). The container is provided with a growth medium (3) which comprises a substrate for a microbial extracellular enzyme and with optical sensors (4) which can be read by means of an optical measuring device (5). An alternative embodiment is shown which shows a sterile package for, for instance, medical aids (2). The package forms a closed container (1) whose wall is provided with an indicator (3) which can be visually read.

Abstract: The invention relates to an optical sensor comprising at least one detection module which comprises an organic light emitting diode (1) and an organic detection photodiode (2, 2a) for measuring emitted light which during the use of the sensor reaches the photodiode via the sample holder. Optionally, a sensor according to the invention further comprises a plastic waveguide.