Abstract:
An assay card and devices and methods for isolating chambers on the assay card are described. The assay card comprises a substrate formed of one or more materials, e.g., plastic, having a softening temperature, the substrate defining channels communicating with respective reaction chambers. The assay card may be heated in a region of the channels to at least the softening temperature. The softened plastic may be deformed, e.g., with a tool which may or may not also provide the heat for softening the substrate. In this manner, the plastic of the substrate may be caused to at least partially obstruct the channels, thereby isolating the reaction chambers. The invention also relates to a method of manufacturing a tool device that includes pins for heating and deforming an assay card.
Abstract:
Systems and methods for analyzing compounds in a sample. In one embodiment, the present technology is directed towards a method of analyzing a sample, comprising: emitting ions from the sample; selecting the emitted ions for a designated ion; fragmenting the designated ions; scanning for a plurality of designated ion fragments; determining a designated fragment chromatographic trace for each designated ion fragment; and generating a combined chromatographic trace corresponding to a non-linear combination of a plurality of designated fragment chromatographic traces.
Abstract:
A device for performing biological sample reactions may include a plurality of flow cells configured to be mounted to a common microscope translation stage, wherein each flow cell is configured to receive at least one sample holder containing biological sample. Each flow cell also may be configured to be selectively placed in an open position for positioning the at least one sample holder into the flow cell and a closed position for reacting biological sample contained in the at least one sample holder. The plurality of flow cells may be configured to be selectively placed in the open position and the closed position independently of each other.
Abstract:
A viscous electrophoresis separation medium is disclosed. The medium is formed by a matrix formed by a copolymer composed of hydrophilic polymer segments having selected, substantially uniform segment lengths, and a plurality of hydrophobic polymer segments carried on, and spaced from one another by the hydrophilic polymer segments. Also disclosed is an electrophoresis method which employs the separation medium, and novel copolymers used in forming the medium.
Abstract:
Long wavelength, narrow emission bandwidth fluorescein dyes are provided for detecting spacially overlapping target substances. The dyes comprise 4,7-dichlorofluoresceins, and particularly 2',4',5',7'-tetrachloro-4,7-dichloro-5- (and 6-) carboxyfluoresceins. Methods and kits for using the dyes in DNA analysis are provided.
Abstract:
A time-of-flight mass spectrometer (11-13) in which sample ions are generated from a target (23) and are focussed into an ion beam (14) that is incident onto a detector (13). A barrier (212) that defines an aperture (213) in the path of the ion beam is positioned to block ions having an extra large deviation from an average time-of-flight of the ions, thereby improving resolution. The aperture can be adjusted to adjust a tradeoff between sensitivity and resolution. Alternatively, the position of the aperture or the bias on an einzel lens can be adjusted to control this resolution.
Abstract:
A method for synthesizing sulfurized oligonucleotide analogs, such as phosphorothioate and phosphorodithioate analogs, is provided that employs a thiuram disulfide as a sulfurizing agent. The method of the invention may be used to sulfurize any phosphorous(III)-containing intermediate. Preferably, the method is practiced on a commercial DNA synthesizer using phosphoramidite and/or phosphorthioamidite intermediates.
Abstract:
Methods and compositions employing poly(alkyl and alkenyl phosphate)s and/or their thiophosphate derivatives are provided for treating viral infections. Preferably, polymers of the invention 20-30 monomers in length are used alone or in combination to treat HIV infections.
Abstract:
An automated apparatus (11) is programmed to perform a process by arranging a sequence of first icons (69) on a display (15) in the order of the process, wherein the first icons (69) represent functions of the apparatus (11), and wherein at least one of the first icons (69) provides a visual representation of a function of the apparatus (11). Said at least one of the first icons can be expanded to show second icons (81) that comprise the function of said at least one of the first icons (69), and at least one of the second icons (81) provides a visual representation of a subfunction of the apparatus (11). In a preferred mode, when said at least one of the first icons (69) is expanded, said at least one of the first icons (69) maintains its same sequential relationship on the display (15) to the other of the first icons (69) in the sequence as before it was expanded.
Abstract:
The compounds include novel linking agents comprising 2-substituted-3-protected-1,3,2-oxazaphosphacycloalkanes and their phosphoramidite precursors. The compounds of the invention further include conjugates of the above linking agents with oligonucleotides and polymer supports. The compounds of the present invention are useful for linking organic moities, such as fluorescent or chromogenic dyes, to polymer supports and oligonucleotides, particularly single- and double-stranded DNA and RNA fragments.