Abstract: An electromagnetic sensing device comprising: a reference microfluidic reservoir to receive a reference substance with magnetic nanoparticles; an analyte microfluidic reservoir to receive an analyte and magnetic nanoparticles; a first excitation magnetic coil to subject the reference microfluidic reservoir to an alternating magnetic field at a first frequency; a second excitation magnetic coil to subject the analyte microfluidic reservoir to an alternating magnetic field at the first frequency; a third excitation magnetic coil to subject the reference microfluidic reservoir to an alternating magnetic field at a second frequency distinct from the first frequency; a fourth excitation magnetic coil to subject the analyte microfluidic reservoir to an alternating magnetic field at the second frequency; a first detection magnetic coil to detect a response magnetic field of the magnetic nanoparticles in the reference microfluidic reservoir; a second detection magnetic coil to detect a response magnetic field of the

Abstract: An electromagnetic sensing device comprising: a reference microfluidic reservoir to receive a reference substance with magnetic nanoparticles; an analyte microfluidic reservoir to receive an analyte and magnetic nanoparticles; a first excitation magnetic coil to subject the reference microfluidic reservoir to an alternating magnetic field at a first frequency; a second excitation magnetic coil to subject the analyte microfluidic reservoir to an alternating magnetic field at the first frequency; a third excitation magnetic coil to subject the reference microfluidic reservoir to an alternating magnetic field at a second frequency distinct from the first frequency; a fourth excitation magnetic coil to subject the analyte microfluidic reservoir to an alternating magnetic field at the second frequency; a first detection magnetic coil to detect a response magnetic field of the magnetic nanoparticles in the reference microfluidic reservoir; a second detection magnetic coil to detect a response magnetic field of the

Abstract: A magnetic sensor for superconducting quantum interference device using single operational amplifier comprising SQUID, a feedback coil, feedback resistor and an operational amplifier. The voltage signal of SQUID is delivered to one input of the operational amplifier, a bias voltage is delivered to other input of the operational amplifier, and the output of the operational amplifier connects to one end of a feedback resistor, the other end of the feedback resistor connects to a feedback coil that is coupled through mutual inductance with the SQUID so as to generate feedback magnetic flux, the output voltage of the operational amplifier drives the feedback resistance to generate current, thereby forming a flux locking loop. The present invention uses an open loop operational amplifier to implement SQUID magnetic flux locking feedback circuit which simplifies the circuit configuration, decrease the loop delay and thereby achieving higher bandwidth of the flux locking loop.

Abstract: A pasteurization tunnel and a method for pasteurizing beverage packs are described, wherein the beverage packs are conveyed on at least two decks lying one upon the other and sprayed with a heated spraying liquid from spraying pipes extending each transversely to the conveying direction of the beverage packs. According to the invention, the spraying liquid is guided through the spraying pipes of the one deck into the spraying pipes of the other deck. Thereby, the maintenance efforts for removing deposits in sections of the spraying pipes where the flow is weak can be reduced.

Abstract: A magnetic sensor for superconducting quantum interference device using single operational amplifier comprising SQUID, a feedback coil, feedback resistor and an operational amplifier. The voltage signal of SQUID is delivered to one input of the operational amplifier, a bias voltage is delivered to other input of the operational amplifier, and the output of the operational amplifier connects to one end of a feedback resistor, the other end of the feedback resistor connects to a feedback, coil that is coupled through mutual inductance with the SQUID so as to generate feedback magnetic flux, the output voltage of the operational amplifier drives the feedback resistance to generate current, thereby forming a flux locking loop. The present Invention uses an open loop operational amplifier to implement SQUID magnetic flux locking feedback circuit which simplifies the circuit configuration, decrease the loop delay and thereby achieving higher bandwidth of the flux locking loop.

Abstract: A pasteurization tunnel and a method for pasteurizing beverage packs are described, wherein the beverage packs are conveyed on at least two decks lying one upon the other and sprayed with a heated spraying liquid from spraying pipes extending each transversely to the conveying direction of the beverage packs. According to the invention, the spraying liquid is guided through the spraying pipes of the one deck into the spraying pipes of the other deck. Thereby, the maintenance efforts for removing deposits in sections of the spraying pipes where the flow is weak can be reduced.

Abstract: A conveyor belt, in particular for a pasteurizer, with a conveyor surface and with support rollers, which are arranged beneath the conveyor surface and support it on a carrier. In order to improve the protection of the conveyor belt against glass breakage without having to significantly increase the drive power, that the conveyor surface is formed from metal.

Abstract: The invention relates to a method for selectively detecting and/or quantifying superparamagnetic and/or ferromagnetic particles on analytes. The method is characterized in that a frequency component of magnetic fields (15, 18), which is generated due to the non-linearity of the magnetization characteristic curve of the particles, is measured at a mixing frequency. A device for selectively detecting and/or quantifying superparamagnetic and/or ferromagnetic particles on analytes comprises: a container (12) that contains particles, which are to be detected and/or quantified, on analytes; at least one oscillator (13, 16; 25) for generating frequencies of alternating magnetic fields (15, 18); at least one field generator (14, 17) for subjecting the analytes to alternating magnetic fields (15, 18); a magnetic field sensor (20) for measuring a response magnetic field (19) of the particles, and; at least one phase-sensitive detector (21, 23).

Abstract: A method and apparatus for identifying a sample in a container, provide for the container with the sample being disposed relative to a resonator, a high-frequency signal being coupled into the resonator for exciting a resonant mode of the resonator, the resonant electric field of the resonator penetrating part of the sample in the container, the resonance curve of at least one resonant mode being measured with and without the sample, and the sample being identified based on the determined change in the resonance frequency compared to a measurement without sample.

Abstract: A conveyor belt, in particular for a pasteurizer, with a conveyor surface and with support rollers, which are arranged beneath the conveyor surface and support it on a carrier. In order to improve the protection of the conveyor belt against glass breakage without having to significantly increase the drive power, that the conveyor surface is formed from metal.

Abstract: A method and apparatus for identifying a sample in a container, provide for the container with the sample being disposed relative to a resonator, a high-frequency signal being coupled into the resonator for exciting a resonant mode of the resonator, the resonant electric field of the resonator penetrating part of the sample in the container, the resonance curve of at least one resonant mode being measured with and without the sample, and the sample being identified based on the determined change in the resonance frequency compared to a measurement without sample.

Abstract: The invention relates to a method for selectively detecting and/or quantifying superparamagnetic and/or ferromagnetic particles on analytes. The method is characterized in that a frequency component of magnetic fields (15, 18), which is generated due to the non-linearity of the magnetization characteristic curve of the particles, is measured at a mixing frequency. A device for selectively detecting and/or quantifying superparamagnetic and/or ferromagnetic particles on analytes comprises: a container (12) that contains particles, which are to be detected and/or quantified, on analytes; at least one oscillator (13, 16; 25) for generating frequencies of alternating magnetic fields (15, 18); at least one field generator (14, 17) for subjecting the analytes to alternating magnetic fields (15, 18); a magnetic field sensor (20) for measuring a response magnetic field (19) of the particles, and; at least one phase-sensitive detector (21, 23).

Abstract: A test device and process for inspecting the integrity of prestressed construction elements. The device comprises a testing head having a magnetization device for generating a magnetic field around the construction element. The testing head is connected to a controller device for controlling the magnetization process and for processing signals corresponding to the magnetic field. The testing head magnetizes the construction element over a predetermined measurement section. The controller switches the magnetization device after the magnetization process is completed and then stores and processes the signals recorded.

Abstract: The dispersion photometer described is designed particularly for the kinetic determination of total proteins and has a light source (20), an optical system, a removable optical cell (24) in the sample chamber, a stirrer, a photo-electric sensor (38) which receives light scattered forward at an angle, and an electronic processing and display unit (46) connected in series with the photo-electric sensor (38). All the elements located between the light source (20) and the optical cell (24), and between the optical cell (24) and the photo-electric sensor (38), have a coefficient of transmission or reflection in the visible region of the spectrum which is as high as possible, and do not reflect or absorb selectively.

Abstract: An apparatus for determining the boiling temperature of a brake fluid to in turn determine the water content therein includes an electrically heatable sensor element (13) immersed into the fluid under test, a power source (12) supplying a current of a constant amplitude, and a measuring system (15) for measuring the voltage drop on the sensor element (13). A stable cellular convection heat transfer mechanism into the surrounding fluid arises, with the voltage drop across the sensor element (13) being indicative of the boiling point of the fluid. The sensor element is in the form of a linear conductor (13', 20, 21) clamped on either end. The sensor element also may comprise a plurality of linear conductors (13', 20, 21) of this type connected in parallel or in series.

Abstract: A stimulation device for the determination of the temperature perception of the skin of a patient by means of a stimulator, which is arranged in a casing and which can be heated up or cooled down by a Peltier element. The stimulator (1) is arranged moveably along an axis (5) in the casing (4) and shows a projection (14) in relation to the casing (4) in the starting position. A first pressure device (6) cooperates with said stimulator (1) in such a way that said stimulator (1) can be shifted along said axis (5) by expenditure of force until said projection (14) is at zero. The force is predefined or adjustable by said first pressure device (6).

Abstract: Vinyl chloride copolymers of (a) from 60 to 78 parts by weight of vinyl chloride, (b) from 1 to 20 parts by weight of glycidyl methacrylate and (c) from 12 to 40 parts by weight of compounds copolymerizable with (a) and (b) have viscosity values, measured in 20% strength by weight toluene solution at 23.degree. C., of from 10 to 100 mPa.s.

Abstract: Isobutylene polymers are prepared continuously, in aliphatic C.sub.3 -C.sub.6 -hydrocarbons in the presence of soluble cationic polymerization initiators and coinitiators at from -40.degree. to 40.degree. C. and under from 0.01 to 10 bar, and the solvents and monomers vaporized during the polymerization are recycled, by a process in which the liquid stream of the monomer solution, containing 40-95, in particular 50-85, percent by weight of the monomers, the liquid streams of the recycle and of the coinitiator solution and the separate stream of the initiator solution are combined in a first zone containing the polymerization zone, and the resulting polymer solution is taken off continuously through a second zone vertically below the first zone. The liquid streams of the monomer solution, the coinitiator solution and the recycle can furthermore be fed into the first zone separately from one another.

Abstract: A process for the preparation of etherified or non-etherified aminoplast resins, wherein an aminotriazine of the general formula (I) ##STR1## where X is hydrogen, alkyl, phenyl, alkylphenyl or --NH.sub.2, is reacted with a .beta.-hydroxyaldehyde of the general formula (II) ##STR2## where R', R" and R'" are identical or different and each is hydrogen or alkyl, or R" and R'", together with the .alpha.-carbon atom, are a cyclopentane or cyclohexane ring, and R" and/or R'" can be hydroxyalkyl and R" can be phenyl, the reaction being carried out in the presence of not less than one alcohol and an acid catalyst for the preparation of etherified aminoplast resins and in the presence or absence of an acid catalyst for the preparation of non-etherified aminoplast resins. The aminoplast resins prepared according to the invention can be used as surface-coatings raw materials.

Abstract: Co-condensates are prepared by condensing from 0.8 to 2.0 moles of butyraldehyde with 1 mole of a phenol at from 80.degree. to 220.degree. C. with the addition, before, during or after the condensation, of from 5 to 50% by weight, based on the mixture of phenol and butyraldehyde, of one or more thermoplastics containing functional groups, which reacts with phenol, butyraldehyde or the phenol-butyraldehyde resin under the condensation conditions. The co-condensates are used as hot-melt adhesives and as binders for nonwovens.