摘要:
The invention relates to a device for electrophoretically separating molecules. The inventive device comprises: at least one plate (100) having a top side (200) and an underside (300); a first separating channel (210) provided for receiving at least one first separating medium (220); at least one second channel (310), which is orthogonal to said first separating channel and which is provided for receiving a second separating medium; optionally comprises implements provided for filling the device with reagents, solvents, buffers, separating media and/or for loading the device with a sample to be separated, and; terminals for applying electric separating voltage to the separating channels. In the device, the first separating channel is located on the plate top side and comprises at least one first opening (216) that leads to the plate underside, whereby the second separating channel is located on the plate underside and comprises at least one second opening (316). The first opening of the first channel and the second opening of the second channel are connected to one another.
摘要:
This invention relates to a microchannel device comprising a microchannel and a liquid introduction means for introducing at least two liquids into the microchannel; characterised in that the introduction means comprises a pulse means for introducing each liquid into the microchannel in the form of a plurality of pulses, and for staggering the pulses of each liquid relative to the pulses of the other liquids. The device may be used to mix liquids for microfluidic applications.
摘要:
The present invention relates to a separation apparatus for the separation and detection of components of a sample. The apparatus includes at least one separation lane suitable for at least partially separating the sample components along a separation direction. A light source configured to emit light suitable to interact with the sample components is disposed in optical communication with the separation lane. Light from the light source enters the separation lane at a light entry point therealong. At least some of the light that enters the separation lane exits the separation lane at a light exit point. The light exit point is spaced apart from the light entry point along the separation direction. A light detector detects the light exiting the separation lane.
摘要:
A method of injecting a sample into an electrophoresis capillary, in which method the capillary (1) is plunged into the sample and an electric field is applied between the ends of the capillary (1) to cause the sample to migrate into the capillary (1), the method being characterized in that the sample is previously introduced into a part (3) presenting a channel (4) of dimensions perpendicular to the direction in which said channel (4) extends that are smaller than about four times the outside diameter of the capillary (1), and in that in order to plunge the capillary (1) into the sample, said capillary (1) is introduced into said channel (4).
摘要:
A method of creating an electrophoresis gel having a gel electrophoresis identifier includes providing a surface including a gel electrophoresis identifier marker; providing an electrophoresis gel on the surface having the gel electrophoresis identifier marker; and forming a gel electrophoresis identifier on the electrophoresis gel with the gel electrophoresis identifier marker of the surface. The gel electrophoresis identifier is used to identify and orient the gel.
摘要:
An improved rotary confocal fluorescence scanner capable of detecting analytes separated on over a 1,000 capillaries simultaneously. This system uses a confocal microscope objective and mirror assembly that rotates inside a vertical ring of capillaries to provide rapid and efficient excitation and detection of fluorescently labeled fragments separated within a cylindrical capillary array. Use of automated procedures to load and run all capillaries permits one to read more than 350,000 base pairs of raw sequence data per hour.
摘要:
The present invention relates to a novel, small-scale, electrophoretic separation system based on photodefined polymers and electrode-defined sample injection. Diffusion and displacement coefficients may be modified by varying the gel concentration, the intensity of the incident UV radiation and the temperature at which the gel is run. The device is an major advance over current technology since it provides for a significant reduction in size of the micro-electrophoresis apparatus and a significant cost savings.
摘要:
A method is disclosed for automated multiplex sequencing of DNA with an integrated automated imaging hybridization chamber system. This system comprises an hybridization chamber device for mounting a membrane containing size-fractionated multiplex sequencing reaction products, apparatus for fluid delivery to the chamber device, imaging apparatus for light delivery to the membrane and image recording of fluorescence emanating from the membrane while in the chamber device, and programmable controller apparatus for controlling operation of the system. The multiplex reaction products are hybridized with a probe, then an enzyme (such as alkaline phosphatase) is bound to a binding moiety on the probe, and a fluorogenic substrate (such as a benzothiazole derivative) is introduced into the chamber device by the fluid delivery apparatus. The enzyme converts the fluorogenic substrate into a fluorescent product which, when illuminated in the chamber device with a beam of light from the imaging apparatus, excites fluorescence of the fluorescent product to produce a pattern of hybridization. The pattern of hybridization is imaged by a CCD camera component of the imaging apparatus to obtain a series of digital signals. These signals are converted by the controller apparatus into a string of nucleotides corresponding to the nucleotide sequence an automated sequence reader. The method and apparatus are also applicable to other membrane-based applications such as colony and plaque hybridization and Southern, Northern, and Western blots.
摘要:
Analytical systems and methods that use a modular interface structure for providing an interface between a sample substrate and an analytical unit, where the analytical unit typically has a particular interface arrangement for implementing various analytical and control functions. Using a number of variants for each module of the modular interface structure advantageously provides cost effective and efficient ways to perform numerous tests using a particular substrate or class of substrates with a particular analytical and control systems interface arrangement. Improved optical illumination and detection system for simultaneously analyzing reactions or conditions in multiple parallel microchannels are also provided. Increased throughput and improved emissions detection is provided by the present invention by simultaneously illuminating multiple parallel microchannels at a non-normal incidence using an excitation beam including multiple excitation frequencies, and simultaneously detecting emissions from the substances in the microchannels in a direction normal to the substrate using a detection module with multiple detectors.
摘要:
A toner characterization cell used to determine characteristics of insoluble particles in a liquid medium. First and second electrode are spaced apart and an electric field is applied between the electrodes and a displacement current is measured. Optical density measuring devices measure the change in optical density in the cell adjacent each electrode. The characteristics are determined from the displacement current and the change in optical density. The characterizing feature may be particle mobility. The invention also relates to a method of determining the characteristics.