47 results about "Assay Unit" patented technology

A biochemical analyzer includes an optical assay unit for light measurement by use of an analysis slide and an LED light source. A fluid sample is positioned on an assay surface of the analysis slide. The light source is oriented to tilt with respect to the assay surface, for applying illuminating light thereto. The optical assay unit includes a photo diode, positioned vertically under the assay surface, for measuring scattered reflected light of diffuse reflection from the assay surface. A light absorber is positioned in a light path of the light emitted by the LED light source and reflected in regular reflection by the assay surface, for absorbing the light. Furthermore, the light absorber is black with a low gloss. The photo diode responds to turning on of the light source, to output a signal of the scattered reflected light.

Sample collection apparatus and methods of sample collection are provided, for example saliva collection apparatus and methods of saliva collection. Said apparatus conveniently comprises a filter assembly and an interface for delivering material from the apparatus to an assay unit.

A surface plasmon resonance (SPR) assay apparatus is provided, in which a flow channel, a sensing surface and an optical assay unit are used. The sensing surface is associated with the flow channel, and contacted by a sample in the flow channel. The optical assay unit applies illuminating light to the sensing surface in contact with the sample, and measures reaction of the sample according to the illuminating light being reflected. A fluid dispenser, after measuring the reaction of the binding, introduces washing fluid on the sensing surface to wash the sensing surface. A cleanliness evaluator, according to the assay signal in the washing, checks whether a regenerated state of the sensing surface is such that the sensing surface is regenerated to an initial state prior to the reaction of the binding. A controller ends up the washing if the sensing surface has been regenerated to the initial state.

A sensor unit for assay in utilizing surface plasmon resonance (SPR) includes a dielectric prism. Metal film has a light entrance surface fitted on the prism, and a sensing surface reverse to the light entrance surface. The sensing surface is adapted to causing interaction between ligand of ligand liquid and analyte liquid. An optical assay unit includes a light source, optical system and photo detector. A flow channel includes the sensing surface positioned inside. In an immobilizing stage, the ligand is immobilized on the sensing surface by introducing the ligand liquid to the flow channel. Evaporation retardant is introduced to the flow channel, and prevents drying of the ligand. The evaporation retardant is removed from the flow channel after transfer of the sensor unit from the immobilizing stage to an assay stage. The analyte liquid is introduced to the flow channel, to assay the interaction.

The nanoimmunoassay chip comprises at least flow and control layers, divided into several rows, each row containing a plurality of single assay units, each assay unit contains two spotting chambers (1) and an assay chamber in the middle, wherein neck valves (2) separate the spotting chambers from the assay chamber during surface derivatization, said assay units being isolated from one another during incubation by isolation valves (3), wherein relief valves (4) help release built-up pressure into a microfluidic channel (5) after incubation and wherein round valves in the assay chamber define and protect the circular immunoassay regions (6).

A microfluidic device comprising one or more fluidic microchannels and one or more arrays of cell assay units is disclosed. Each cell assay unit in turn comprises at one bipolar electrode, micropocket, reaction chamber, and leak channel. In some embodiments, the cell assay unit further comprises two or more split BPEs inside the reaction chamber. The disclosed microfluidic device can be used to separate cells, especially rare cells, from its biological matrix and then analyze the isolated cell inside the reaction chamber. The disclosed device can isolate and analyze cells in a high-throughput fashion and without any modification or labelling to the cells. Cells isolated using the disclosed devices does not lose their vitality.

Methods, devices, systems, and kits useful for the collection and analysis of samples obtained by swabs are disclosed. Swab containers configured for receiving a swab containing a sample; cartridges for holding one or more of: a swab container, a swab, assay units, pipette tips, vessels, transport units, and implements; systems (which may include a sample processing device); kits; and methods for their use are disclosed. A swab container may include an entry port; an assay chamber having an assay port; a conduit comprising an interior channel connecting the entry port; and an interior channel providing fluidic communication between the entry port and assay chamber. An interior channel may be configured to squeeze a portion of a swab placed in or through the conduit.A cartridge may include a cartridge frame configured to receive one or more of swab containers, assay units, transport units, pipette tips, vessels or implements.

The invention relates to the technical field of measuring of particulate matter adsorption quantity of plants, in particular to a plant trunk surface particulate matter sampling device and a particulate matter adsorption quantity measuring method. The plant trunk surface particulate matter sampling device comprises a guide pipe, a sampling bottle, a scrubbing brush, a washing bottle with ultrapure water, adhesive tape arranged on a tree trunk and sealing cement gum. The sealing cement gum and the first adhesive tape enclose a sampling surface with the periphery being sealed, and a suspension liquid collection region is formed above the sealing cerement gum. A plastic thin film is laid on the upper surface of the sealing cement gum, and the guide pipe penetrates through the sealing cement gum and the plastic thin film to be communicated with the sampling bottle and the collection region. The scrubbing brush and the washing bottle are used for scrubbing the sampling surface. By means of the plant trunk surface particulate matter sampling device and the particulate matter adsorption quantity measuring method, the particulate matter adsorption quantity on the surface of the tree trunk in unit area can be effectively measured, the loss generated in the particulate matter sampling process is reduced to the maximum degree, and the measuring accuracy is guaranteed.

The invention provides a hydraulic power unit (1) for an injection molding machine, which comprises a piston for moving the components of an injection moulding machine and the piston can be in a hydraulic movement between two end positions (E1, E2) in a hydraulic cylinder (2); a hydraulic pump (4) for pumping hydraulic fluid; a hydraulic line (5) arranged between the hydraulic pump (4) and the hydraulic cylinder (2); and a control or regulating unit (7) for controlling or regulating the hydraulic pump (4). The flow rate (Q) of the hydraulic fluid per unit time (t) is measurable and a corresponding signal is transmitted to the control or regulation unit (7). The position (P) of the piston is calculated by the control or regulation unit (7).

An assay apparatus is loaded with a sensor unit as surface plasmon resonance (SPR) biosensor, which includes a transparent dielectric medium and thin film. A first surface of the thin film is a thin film/dielectric interface. Its sensing surface causes reaction of sample fluid. An optical assay unit assays reaction of the sample fluid by detecting illuminating light reflected by the interface. Measured data from the optical assay unit is compared with a reference parameter, to evaluate suitability of the measured data for analysis. If lack of the suitability is estimated in the evaluation, a succeeding density of the sample fluid to be used in a succeeding evaluating assay is determined according to the measured data with the estimated lack of the suitability. The sample fluid is prepared at the succeeding density by mixing with diluent fluid, and then is used for the succeeding evaluating assay.

The invention discloses a mercury content detection method for a nitrate injection fluorescent lamp, which is characterized in that the method comprises the following steps: A, freezing a fluorescent tube to make the gaseous mercury in the tube turn into liquid or solid; B, drilling two holes on the surface of the tube and enabling the two holes to be communicated with the space inside the tube; C, under an ambient temperature of 25 plus/minus 1 DEG C, injecting the accurately measured nitric acid into one hole, and then blocking the two holes with silica gel; D, after the silica gel is solidified, swinging the tube and enabling the mercury in fluorescent lamp to be fully reacted with the nitric acid; E, removing the silica gel and pouring out the mercury-containing nitric acid solution in the tube; and F, measuring the mercury content per unit volume and multiplying the mercury content per unit volume by the total amount of the injected nitric acid so as to obtain the total mercury content of the fluorescent tube. The invention saves cost and reduces harmful emissions, and is provided with high measurement precision.

A device for rapid detection of a tuberculosis lipoarabinomannan (TB-LAM) is provided. The device includes a pre-concentrator unit for concentrating the TB-LAM comprising: an ion-exchange medium comprising one or more ligands configured to capture the TB-LAM from the source biological sample, wherein the captured-TB-LAM is eluted from the ion-exchange medium as an eluate comprising a concentrated form of TB-LAM; a cassette; a lateral flow assay unit disposed in the cassette; and an integration unit attached to the pre-concentrator unit and the cassette. The integration unit is configured to operatively couple and de-couple the pre-concentrator unit and the cassette. The pre-concentrator unit and the lateral flow assay unit disposed in the cassette are in a fluidic communication in a coupled form. The device for rapid detection of TB-LAM further comprises a dilutor unit.