摘要:
A low-cost, non-instrumented, easy-to-use disposable platform for extraction, stabilization, and preservation of viral RNA in specimens at the point of collection is described. The system may use chemical heating. The platform performs the following steps: specimen lysis, RNA extraction, and RNA stabilization in a modular approach. This modular approach confers versatility to the product for application to multiple targets such as avian flu, and HIV, specimens such as blood, nasal swabs, and downstream applications such as PCR or transcription-mediated amplification. The technology described is a point-of-care specimen-processing platform generically applicable to both emerging point-of-care and central-facility molecular diagnostic tests, as well as to surveillance applications.
摘要:
A spectrometer arrangement for measuring a spectrum of a light beam emitted by a narrowband light source, such as a bandwidth-narrowed laser, includes at least one etalon, a beam splitter for splitting the light beam into a first partial beam and a second partial beam, one or more optical directing elements for directing the first partial beam n times and the second partial beam (n+k) times through the at least one etalon, wherein n and k are integers ≧1. The spectrometer arrangement further has at least one light-sensitive detector and an evaluation device for evaluating the spectra—recorded by the at least one detector—of the first partial beam that has passed through the at least one etalon n times and of the second partial beam that has passed through the at least one etalon (n+k) times in order to determine the light spectrum corrected for the apparatus function of the at least one etalon.
摘要:
A method for producing an optical element or part of an optical element having a base body, including:—providing a mold body (21, 1000, 2000) which has a surface corresponding to the geometry of the optical element;—depositing a layer system (7) including at least one separation layer system (15, 1010, 2010) on the surface of the mold body (21, 1000, 2000);—electroforming a base body (4, 1030, 2030) on the layer system (7); and—detaching at least the base body from the mold body (21, 1000, 2000) at the separation layer system (15, 1010, 2010).
摘要:
The disclosure relates to a light beam intensity non-uniformity correction device that includes an optical element having a light entrance face with an antireflective property. According to the invention the antireflective property is locally amended in order to enhance light beam intensity uniformity. The disclosure further relates to a method for amending intensity distribution of a light beam in an optical system having one or more optical elements, where the method includes: a) assembling the optical system with the one or more optical elements arranged in predetermined positions, b) measuring intensity distribution, c) calculating locally required increase or decrease in absorption and/or reflection of one of the optical elements to amend measured intensity distribution into a predetermined intensity distribution, d) removing the optical element from the optical system, e) locally amending absorption and/or reflection of the one of the optical elements according to the calculation, f) installing the optical element in the predetermined position in the optical system.
摘要:
The disclosure relates to a light beam intensity non-uniformity correction device that includes an optical element having a light entrance face with an antireflective property. According to the invention the antireflective property is locally amended in order to enhance light beam intensity uniformity. The disclosure further relates to a method for amending intensity distribution of a light beam in an optical system having one or more optical elements, where the method includes: a) assembling the optical system with the one or more optical elements arranged in predetermined positions, b) measuring intensity distribution, c) calculating locally required increase or decrease in absorption and/or reflection of one of the optical elements to amend measured intensity distribution into a predetermined intensity distribution, d) removing the optical element from the optical system, e) locally amending absorption and/or reflection of the one of the optical elements according to the calculation, f) installing the optical element in the predetermined position in the optical system.
摘要:
A microfluidic device for concentrating particles in a concentrating solution. A sample and a concentrating fluid flow laminarly with a microfluidic channel wherein the concentrating fluid is formulated such that it extracts fluid from the sample and thus concentrates the particles in the sample.
摘要:
An integrated heat exchange system on a microfluidic card. According to one aspect of the invention, the portable microfluidic card has a heating, cooling and heat cycling system on-board such that the card can be used portably. The microfluidic card includes one or more reservoirs containing exothermic or endothermic material. Once the chemical process of the reservoir material is activated, the reservoir provides heat or cooling to specific locations of the microfluidic card. Multiple reservoirs may be included on a single card to provide varying temperatures. The assay chemicals can be moved to the various reservoirs to create a thermal cycle useful in many biological reactions, for example, Polymerase Chain Reaction (PCR) or rtPCR. According to another aspect of the invention, the integrated heat exchanger is an adjacent microfluidic circuit containing fluid that is either independently heated or cooled, or is an exothermic or endothermic material, such that the fluid in the adjacent circuit imparts a change in temperature to the assay fluid in an independent circuit. According to yet another aspect of the invention, a thermal electric cooler (TEC) is used for thermocycling the amplification chamber of a disposable microfluidic card.
摘要:
In a method for mutually aligning a mask pattern formed in a mask 1 and a substrate 2, on which the mask pattern is to be imaged, by using setting marks 12a, 12b and 13a or 13b in the mask 1 and in the substrate 2, the alignment is performed with the aid of an imaging system and a light beam with polarized light 9. A phase shift for the first diffraction orders 20 is undertaken in the beam path 9a, 9b. Higher diffraction orders 21 and unwanted light are filtered out after the phase shift, and after the filtering out the light beams of the first diffraction orders 20 are detected, and the result is evaluated for the purpose of alignment.
摘要:
A device and method for introducing a second laminar fluid layer to, or removing a second laminar fluid layer from, a first laminar fluid layer are provided. Each laminar fluid layer can contain two or more side by side laminar streams. The device includes a main flow channel, and at least one tributary channel in fluid connection with a bridge channel which is in fluid connection with main flow channel. The device can be formed in a single piece of material, which can be optically transparent. Optionally, the channels can be formed in a first plate, the first and optionally the second surfaces of which are sealed to a second and optionally a third plate. The second and third plates can be optically transparent to allow for optical detection and analysis. A first laminar fluid layer is introduced into the main flow channel. If a second laminar fluid layer is to be added to the first laminar fluid layer, then the former is introduced into the tributary channel, from whence it flows into the bridge channel and then into the main flow channel, where it flows below the first laminar fluid layer and diffusionally mixes with it. Preferably, the width of the main flow channel is relatively small, so that particles in an added second laminar fluid layer diffusionally mix into the first laminar fluid layer rapidly. If a second laminar fluid layer is to be removed from a first laminar fluid layer, then the latter is split into two portions: one portion continues flowing down the main flow channel and one portion flows into the bridge channel from whence it flows into the tributary channel.
摘要:
A body fluid sampling device is provided. A mesh may be used to guide blood or fluid to travel directly from the wound to an analyte detecting port on the cartridge. Thus the volume of blood or body fluid produced at the wound site irregardless of its droplet geometry can be reliable and substantially completely transported to the analyte detecting member for measurement.