摘要:
A microarray includes a solid substrate having a surface, the surface having a plurality of binding spots and a plurality of reaction moieties bound to the binding spots. A reaction moiety includes a plurality of polyacetylene monomers, the polyacetylene monomers having a first coupling region and a second coupling region, the first coupling region having a first functional group operable to bind to the binding spot and the second coupling region comprising a second functional group operable to bind to an accessory molecule; and an accessory molecule having a binding region and an analyte reaction region, the analyte reaction region operable to selectively bind to the target analyte, and the binding region operable to bind to the second coupling region of the polyacetylene monomer. Upon binding a target analyte with the reaction moiety, a color change from the polyacetylene monomer occurs and the reaction moiety produces fluorescence.
摘要:
Devices and methods for detecting interaction between components associated with lipid membranes and analytes are described herein. In certain methods, a surface of a compartment of a device is coated with a material that attaches to lipid membrane from a sample. An analyte is introduced and interaction is detected, for example, by back scattering interferometry. In another method, a surface is passivated with a material that does not bind a lipid membrane. A sample is introduced that contains a membrane comprising a component for testing and an analyte. Interaction is detected. In a third method, a channel is filled with a first liquid that does not comprise a lipid membrane. A bolus of a second liquid that comprises a membrane comprising a component for testing and an analyte is introduced under laminar flow conditions so that a leading edge of the second liquid does not completely displace the first liquid in a sensing area that is interrogated by optical methods, for example, a laser. Interaction between the analyte and the component is detected.
摘要:
The invention comprises a device for detecting an analyte in a liquid sample deposited on a first portion of the device for transport to a second portion of the device that is in fluid contact with the first portion. In specific embodiments, the device comprises a labeled conjugate comprising a binding member reactive with a first epitope of the analyte and a label comprising a gold colloid, preferably having a mean particle size of 50 nm to 100 nm. In further embodiments, the device comprises a capture component comprising polymerized streptavidin. The diagnostic device is particularly useful in the preparation of pregnancy test kits.
摘要:
The present invention relates to a device and methods for detecting or quantifying an analyte in a test sample. The device includes a substrate defining one or more microchannels and having a reaction region in a first portion of the one or more microchannels, wherein the reaction region contains a first binding element selected to bind with a first portion of the analyte. The device also includes a detection region in fluid communication with the reaction region. The detection region includes a second binding element selected to immobilize the analyte within the detection region. Methods of detecting or quantifying an analyte in a test sample using the device of the present invention are also disclosed. A method for coating a polymer with a gold layer is also disclosed.
摘要:
The present invention relates to the field of molecular diagnostics, and in particular to diagnostics based on a liquid crystal assay format. In particular, the present invention provided improved substrates and methods of using liquid crystal assays for quantitating the amount of an analyte in a sample. The present invention also provides materials and methods for detecting non-specific binding of an analyte to a substrate by using a liquid crystal assay format.
摘要:
Disclosed herein is a device and method for converting the resistances of an array of metal oxide sensors into digital signals, wherein the sensors respond to the concentration of gases surrounding the sensor array. The device includes an electronic excitation device that provides an excitation voltage to the sensors; analog-to-digital signal conversion devices that convert the resistances of the sensors to digital signals; and means for calculating gas concentrations from the digital signals.
摘要:
Microcantilever sensors having protected microcantilever arms are described. The sensors are well suited for analyte detection and measuring other small movements. The protected arm reduces damage due to handling and assists in assembly of the microcantilever sensor with a transducer.
摘要:
There is described a system for multiparameter analysis of analytes. The system comprises: 1) primary supports (1) with a largest dimension (3) of 500 μm or less suspended in use in a fluid solution; 2) each primary support (1) comprises an identification means (2) for identification thereof; 3) at least one primary analyte (12) is bound to each primary support (1); 4) a secondary analyte (12′) is suspended in use in the fluid solution; and 5) a measuring means (25) is arranged in communication with the fluid solution for monitoring interaction between the primary analyte (12) and secondary analyte (12′). The system is distinguished in that: 6) secondary supports (1′) with a largest dimension at the most the same size as the largest dimension (3) of the primary supports (1) are suspended in use in the fluid solution; 7) each secondary support (1′) comprises an identification means (2′) for identification thereof; 8) at least one secondary analyte (12′) is bound to each of the secondary supports (1′); and 9) the measuring means (25) is arranged to detect any post-reaction interaction between one or more primary analyte (12) and one or more secondary analyte (12′) by detecting the identification means (2, 2′) of the primary and secondary supports (1, 1′) attached thereto. There is also described a method of multiparameter analysis of analytes using the system.
摘要:
A chemical sample collection and detection system is disclosed. The chemical sample collection and detection system includes a sample collection device and a detection device. The sample collection device includes a housing having two opposite sides and at least one openings on each side to allow a fluid sample passing through the housing; and a sorbent material placed between the two opposite sides of the housing or a sorbent coated screen. The sorbent material adsorbs chemical vapors, and traps particles and aerosols in the fluid sample when the fluid sample passes the housing through the openings. The detection device includes an atmospheric pressure ionization source and an ion detector. The atmospheric pressure ionization source desorbs and ionizes the chemicals trapped/sorbed on the sorbent material and the ion detector analyzes the ions for the presence of the sorbed chemical.
摘要:
A method for the determination of an analyte in a liquid sample, especially a body liquid sample, with the aid of an analytical apparatus. The apparatus receives a first measuring signal si (i=0, 1, . . . ) and a second measuring signal sj (j=1, 2, . . . ; j>i) for a test system with several successively arranged measuring areas through which a liquid sample with an analyte can flow after being applied on the test system are received by an evaluation apparatus comprised by the analytical apparatus, wherein the first measuring signal si indicates a part of the analyte bound in a first measuring area and the second measuring signal sj indicates a part of the analyte bound in a second measuring area that is arranged downstream the first measuring area on the test system after the application of the liquid sample on the test system, a concentration measure N correlating with the concentration of the analyte in the liquid sample is determined by the evaluation apparatus in accordance with the following linkage of measuring signals: N = ( s j ) i + 2 [ s i - ( ( s i ) j - i - 1 · s j ) 1 j - i ] · ( ( s i ) j - i - 1 · s j ) i j - 1 , and the concentration measurement is outputted by the evaluation apparatus after a selective further processing. Furthermore, the invention relates to an analytical apparatus for the determination of an analyte in a liquid sample as well as to a computer readable medium for performing function to determine an analyte in a liquid sample.