1297 results about "Cuvette" patented technology

An automated analyzer for analyzing patient samples. The analyzer includes a plurality of cuvettes, which allow the samples to be mixed with various reagents. The analyzer includes one or more detectors, including a detector adapted to detect luminescence of the reaction mixture in the cuvettes. The analyzer allows for various diagnostic assays to be performed on a single system, and provides for high-sensitivity analysis at faster speeds.

A system for conducting the identification and quantification of micro-organisms, e.g., bacteria in urine samples which includes: 1) several disposable cartridges for holding four disposable components including a centrifuge tube, a pipette tip having a 1 ml volume, a second pipette tip having a 0.5 ml volume, and an optical cup or cuvette; 2) a sample processor for receiving the disposable cartridges and processing the urine samples including transferring the processed urine sample to the optical cups; and 3) an optical analyzer for receiving the disposable cartridges and configured to analyze the type and quantity of micro-organisms in the urine sample. The disposable cartridges with their components including the optical cups or cuvettes are used in the sample processor, and the optical cups or cuvettes containing the processed urine samples are used in the optical analyzer for identifying and quantifying the type of micro-organism existing in the processed urine samples.

A method for quantitatively measuring nucleic acid amplification reactions, especially the polymerase chain reaction, employing microparticles as hybridization solid phase, a probe sequence labeled with a fluorescent label and a fluorescence detection system which is based on two-photon fluorescence excitation, contacting all the amplification reaction components and the solid phase simultaneously in a closed cuvette, performing the amplification reactions in the same cuvette, focusing a two-photon exciting laser beam into the cuvette during the amplification cycles and measuring the fluorescence signal emitted by the microparticles from one particle at a time when they randomly float through the focal volume of the laser beam. The features of this invention allow a method and device for performing a fast quantitative nucleic acid amplification assay of single or multiple target sequences in a very small closed sample volume.

A flow cell and flow cytometer in which a nozzle at the end of a flow channel is disposed on a removable substrate held at a registered location on a flow cell. Other elements including illumination optics, light collection optics, and the flow cell may then be positioned at fixed locations and would not require subsequent periodic adjustment. The registered location for positioning the nozzle allows removal and replacement of the nozzle key with the nozzle subsequently positioned in the identical location.

A method for monitoring consumption or release of a gaseous analyte such as oxygen by a liquid sample under investigation includes providing a cuvette (1) having an elongate narrow tube (12) of a material which is substantially gas impermeable and which is at least partly transparent to measurement excitation radiation and emission radiation along some of the length of the tube. The tube (12) has a cross-sectional area of under 1 mm². The sample (15) is loaded into the cuvette (1), the sample being in contact with a probe in the tube (12), the probe being sensitive to the gaseous analyte, and the liquid having at least one surface and an associated headspace (16). The cuvette, the sample, and the probe are equilibrated at a target measurement temperature. Excitation radiation is directed at a sampling zone of the tube (12) and which is distal from the headspace (16), while maintaining the cuvette at the measurement temperature. The emitted radiation is measured and analysed to determine consumption or release by the sample of the gaseous analyte.

The present invention relates to a system for conducting the identification and quantification of micro-organisms, e.g., bacteria in biological samples. More particularly, the invention relates to a system comprising a disposable cartridge and an optical cup or cuvette having a tapered surface; wherein the walls are angled to allow for better coating and better striations of the light, an optics system including an optical reader and a thermal controller; an optical analyzer; a cooling system; and an improved spectrometer. The system may utilize the disposable cartridge in the sample processor and the optical cup or cuvette in the optical analyzer.

A vessel for use in clinical analysis including an open top, a closed bottom, and at least four tapered sides. A method for collecting magnetic particles in a fluid comprising the steps of providing a magnet and a vessel containing magnetic particles in a fluid, attracting the magnetic particles to the magnet, and moving the magnetic particles with the magnet out of the fluid.

The present invention relates to an on-line method and a flow system as well as a cuvette for carrying out IR spectrometry for analysis of liquid food products, possibly containing dissolved gases, in a process line in a liquid food product processing plant, especially a dairy processing milk and milk products. A liquid sample is extracted from the process line to a measuring branch, the sample is thermostated and passed to a measurement cuvette. The IR-absorbance spectrum is measured, e.g. in the MID-IR or NIR-range. In order to obtain an on-line monitoring of the process line the liquid food sample is extracted directly from the process line into the measurement branch, in which the pressure is maintaining at least as high as in the adjacent process line. The high pressure ensures that dissolved air will stay dissolved in the liquid food. Before each new sample the measurement branch and cuvette are flushed by high flow rates with a part of the new sample to clean the cuvette. The measurement cuvette has strong windows, preferably diamond windows to stand a high pressure and high flow rates. The on-line system is arranged to carry out eg. 120 measurements per hour.

A microchip including a first substrate with a groove formed on a substrate surface or a pass-through hole passing in a thickness direction of the substrate, and one or more second substrates laminated on a surface of the first substrate; the microchip including an optical measurement cuvette consisting of a space configured by the groove or the pass-through hole, and a substrate surface of the second substrate; wherein a side wall surface of the second substrate is positioned on an inner side than a side wall surface of the first substrate in at least one part of a side wall surface of the microchip, and a method of using the same are provided.

An apparatus and related method for optical calibration of spectrophotometers is described. The apparatus is a calibration plate including one or more cuvettes filled with solutions of interest. The cuvettes are sealed to prevent evaporation. The cuvettes also possess a compressible component to allow for expansion of the solution and a bubble control apparatus to ensure that the compressible component does not intersect the beam path. A piece of neutral density glass is optionally included in the apparatus to track optical changes of the solutions over time.

An analyzer for performing automated assay testing. The analyzer includes a storage and conveyor system for conveying cuvettes to an incubation or processing conveyor, a storage and selection system for test sample containers, a storage and selection system for reagent containers, sample and reagent aspirating and dispensing probes, a separation system for separating bound from unbound tracer or labeled reagent, a detection system and date collection/processing system. All of the subunits of the machine are controlled by a central processing unit to coordinate the activity of all of the subunits of the analyzer. The analyzer is specifically suited for performing heterogeneous binding assay protocols, particularly immunoassays.

A method for quantitative hemoglobin determination in undiluted, unhemolyzed whole blood is provided which comprises: acquiring a sample of unaltered whole blood into a capillary cuvette, presenting the cuvette to a set-up for an absorption measurement, delaying absorption measurement for a determined period of time, performing a first absorption measurement at a first wavelength in the range 490-520 nm directly on the sample in the cuvette, further conducting a second absorption measurement at a second wavelength different from the first wavelength and at which the absorption is substantially smaller than at the first wavelength, and processing results of the first and second absorption measurements to determine the concentration of hemoglobin in the sample. A system for implementing the method also is provided.

The present invention relates to the technical field of laser spectrum detection and gas detection, and in particular relates to a two quantum cascade laser spectrum-based multicomponent gas simultaneous detection device and method. An arbitrary waveform function generator outputs a periodic signal which only superposes high-frequency modulation signals in any half period to be used as a laser current signal, a room temperature continuous mode mid-infrared quantum cascade laser is driven by a current control unit, the laser emits a laser signal, the laser signal passes sequentially through a focusing collimating three-dimensional adjustment system, a first mirror, a sample absorption pool and a off-axis parabolic mirror to be reflected to a first detector, the first detector passes the laser signal through a data acquisition unit to convert into an electrical signal and transmit to a computer, and information of the gas to be measured can be obtained by analysis and processing of the electrical signal by the computer. The devices simultaneously utilizes two spectrums for gas detection, and has the advantages of high detection sensitivity, high detection accuracy, no need of external standard gas calibration, simple optical path adjustment, fast response, and stability, and the like.

An embodiment provides a cuvette apparatus including: a lid and a body, the body including a fluid channel disposed therein; and the lid including at least one opening aligned with a portion of the fluid channel, thereby providing access to the fluid channel in the body. Other aspects are described and claimed.