Abstract:
An automated system for rapid sequential photometric analysis of a collection of double fluorochrome stained lymphocyte specimens, useful for antibody screening or lymphocytotoxicity analysis. The specimens are sequentially alternately irradiated with light of two distinguishable wavelengths, producing fluorescence at two distinguishable wavelengths. The fluorescent emission light intensity for each irradiation of each specimen is measured using a photometer and computer. The computer controls the synchronization of the irradiation through alternately selected condenser sets with the sequential movement of specimens into the optical path of the irradiating and detected light, and calculates the quotient of the light intensities emitted from each specimen at the two selected fluorescent light wavelengths. These quotients are compared against a control ratio (for lymphocytotoxicity analysis) to classify the specimen. Also described is a method of preparing specimens for such analysis, which requires that a complement be added to the first staining solution after the latter is applied to the specimens, then this combination agitated, and then the second staining solution added and the specimen incubated.
Abstract:
L'invention concerne un procédé optique d'inspection en ligne de récipients transparents ou translucides (3) défilant entre une source lumineuse (7) et un système (9) de prise d'images des récipients et d'analyse des images prise. Selon se procédé; on illumine chaque récipient (3) par la source lumineuse (7) présentant une variation d'intensité lumineuse selon un motif périodique (7 1 ) de période T1 selon au moins, une première direction de variation (D), on prend pour chaque récipient (3), un nombre N supérieur ou égal à trois, d'images du récipient défilant devant la source lumineuse et occupant respectivement N positions différentes le long de la trajectoire de défilement, entre chaque prise d' image, on crée un décalage relatif entre le récipient et le motif périodique selon une direction de variation (D) du motif périodique (7 1 ), » on détermine et applique une transformation géométrique, dans au moins N-1 images d'un même récipient, pour au moins un ensemble de points appartenant au récipient, afin de mettre en coïncidence les pixels appartenant au récipient dans les H images successives d'un même récipient on construit pour chaque récipient (3), à partir des N images recalées du récipient, une image de phase, on analyse limage de phase afin d'en déduire au moins la présence d'un défaut réfractant la lumière ou la qualité de répartition du matériau constitutif du récipient.
Abstract:
A tip for use in an optical detection system to analyze an analyte in a fluid sample drawn into the tip, using light reflected from a detection surface inside the tip that the analyte binds to, comprising a first detection surface and a second detection surface located in a same flow path with no controllable valve separating them, wherein the first and second detection surfaces have different surface chemistries.
Abstract:
The present invention relates to assays, methods, and kits to assess traumatic brain injury (TBI) in a subject. The present invention also relates to ultrasensitive assays for GFAP, tau, CKBB, IL-1β, IL-2, IL-6, IL-10, IL-22, IP-10, TNFα, TSLP, NFL, and/or NFH.
Abstract:
Provided herein are methods of determining molecular binding kinetics on particles, such as magnetic nanoparticles. In some embodiments, the methods include introducing an incident light from a light source toward a sample container that comprises a particle-bound biomolecule-ligand composition comprising a plurality of particle-bound biomolecules and a plurality of ligands that binds, or is capable of binding, to biomolecules of the plurality of particle-bound biomolecules, detecting light scattered from particle-bound biomolecule-ligand complexes in the particle-bound biomolecule-ligand composition over a duration to produce a set of imaging data using the detector, and determining size or volume changes of one or more of the particle-bound biomolecule-ligand complexes during at least a portion of the duration from the set of imaging data to thereby determine the molecular binding kinetics on the particles. Related systems and computer readable media are also provided.
Abstract:
An example system includes a light intensity measuring apparatus couplable to a food processing apparatus and a computing system. The light intensity measuring apparatus includes a chamber configured to receive a water sample from the food processing apparatus, a light source, a detector configured to detect light that has passed through the water sample and measure multiple times intensities of wavelengths of the light to obtain multiple sets of measured intensities of wavelengths, and a communication module configured to provide the multiple sets of measured intensities of wavelengths. The computing system may receive the multiple sets of measured intensities, process the multiple sets to obtain a set of values, apply a first set of decision trees to the set of values to obtain a first result indicating a positive or negative foodborne pathogen detection, generate a notification indicating either the positive of negative detection, and provide the notification.
Abstract:
Methods for programming an array scanner to scan a plurality of biopolymer arrays are provided. In the subject methods, individual scanning parameters for at least two different arrays of the plurality of arrays to be scanned are selected and input into the array scanner prior to scanning the plurality arrays. The programmed scanner then scans the plurality of arrays according to the pre-selected scanning parameters Also provided are scanners programmed according to the subject methods, as well as computer programming that provides for programming of scanners according to the subject methods. The subject methods and compositions find use in a variety of different applications, including both genomics and proteomics applications.
Abstract:
Methods for programming an array scanner to scan a plurality of biopolymer arrays are provided. In the subject methods, individual scanning parameters for at least two different arrays of the plurality of arrays to be scanned are selected and input into the array scanner prior to scanning the plurality arrays. The programmed scanner then scans the plurality of arrays according to the pre-selected scanning parametersAlso provided are scanners programmed according to the subject methods, as well as computer programming that provides for programming of scanners according to the subject methods. The subject methods and compositions find use in a variety of different applications, including both genomics and proteomics applications.
Abstract:
Detection arrangement and method for detecting presence of a residue in a sample by determining color values of the sample, associated with the L*a*b color model, where a value of a composite parameter Z is calculated as follows: Z=wL+waa+wbb where wL, wa, and wb are weighting factors having a value depending on said residue and said sample, and a determination is made whether or not said sample comprises more or less than a predetermined amount of said residue in dependence on said value of said composite parameter Z. In a preferred embodiment, the arrangement is used to detect antibiotic residues, e.g. penicillin-G, in food products, e.g. milk, or body fluids, e.g. blood, urine.
Abstract:
An apparatus and a method for continuous display of a particle sedimentation rate in a liquid includes a rotary support device adapted to hold a plurality of light-transparent containers, and wherein each container holds a liquid. Any container may be selected to be observed so that at least a portion of the selected container may be observed from the exterior. A light source illuminates the selected container, and an image-forming device is arranged to form an image of the aforesaid portion of the selected container, and the liquid held therein. Video signals are created from the so-formed image, and a computer is arranged to process the video signals. A transmission conduit transmits the video signals from the image-forming device to the computer, and a display is provided for displaying the signals processed by the computer.