Abstract:
A reagent delivery method includes placing a reagent delivery column including a plurality of reagent storage elements therein in a centrifugal device, coupling a breaching element to the housing, and rotating the centrifugal device to force the reagent storage elements toward the breaching element, breaching of the reagent storage elements releasing reagent therein and communicating the same to an external environment. A reagent delivery system includes a column having a housing, a plurality of reagent storage element sheets positioned in the housing or forming a stack, a plurality of breaching elements, and a microplate having a plurality of wells, the microplate coupled to the housing where each well corresponds or aligns with a breaching element and a reagent storage element. The system can be rotated in a centrifugal device to force the reagent storage element stacks toward the breaching elements.
Abstract:
A nucleic acid extraction device includes a tube part in which a first plug of an oil, a second plug of a cleansing liquid not miscible with the oil for cleansing a material with adsorbed nucleic acid, a third plug of an oil, a fourth plug of an eluate not miscible with the oil for eluting nucleic acid from the material, and a fifth plug of an oil are provided in this order, and a cover part provided to surround the tube part.
Abstract:
The disclosure provides a composition and method for isolating nucleic acids, in which the composition includes at least one halocarbon, at least one salt and at least one surfactant. Mixing the composition and a biosample to form a homogenized solution, nucleic acids in the solution can be easily isolated with a simple treatment and good yield.
Abstract:
The invention is directed to methods of extracting nucleic acids from microorganisms or mammalian cells adhered to polymers that are malleable within a living organism and particularly malleable in the oral cavity of the living organism. The invention also provides for method of detecting and quantitating microorganisms that adhere to malleable polymers, such as chewing gum.
Abstract:
A sample preparation cartridge is described having a lower portion having four integrally-formed leaf springs, and a raised lower base part which is slightly below the level of the leaf springs. An upper portion of the cartridge engages with the lower portion, via four paired pins and holes formed in the lower and upper portions. The upper portion includes three well-shaped openings formed in the central region of the upper portion. Between the upper and lower portions is placed a sheet of sample preparation paper, resting on the leaf springs, which raise the lower face of the paper away from the raised lower base part, leaving a small air gap between the base and the paper. The upper face of the paper is in contact with the well-shaped openings of the upper portion. The user loads a liquid sample into the openings, and the paper wicks the liquid sample away from the loading location, leaving cellular debris in the place of application. Applying pressure to the upper portion of the cartridge urges the paper into contact with the raised base portion, so providing a firm base which allows the user to remove sections of the paper, using for example a biopsy needle, for further processing.
Abstract:
Procedure for the specific isolation of total DNA content of bacterial germs of different samples, in the course of which the cells are lysated, the DNA content of the lysate is bound selectively, it is washed and then the desalinated linear polymer nucleic acid is eluted from the binding surface in an aqueous solution. Before cell lysis the nonviable bacterial cells are separated from the viable cells on the basis of their different cell surface physical-chemical characteristics, the viable cells of the sample are kept and then lysated using a mechanical and/or enzymatic, favorably lysozyme enzymatic method. After this exclusively double-stranded DNA deriving from the lysate of viable cells is bound on a —SiO2—TiO2— matrix containing chemically activated —OH and dodecylamine groups, and after washing it, the desalinated linear polymer nucleic acid is eluted in an aqueous solution.
Abstract:
A self-contained apparatus for isolating nucleic acid, cell lysates and cell suspensions from unprocessed samples apparatus, to be used with an instrument, includes at least one input, and: (i) a macrofluidic component, including a chamber for receiving an unprocessed sample from a collection device and at least one filled liquid purification reagent storage reservoir; and (ii) a microfluidic component in communication with the macrofluidic component through at least one microfluidic element, the microfluidic component further comprising at least one nucleic acid purification matrix; and (iii) at least one interface port to a drive mechanism on the instrument for driving said liquid purification reagent, through the microfluidic element and the nucleic acid purification matrix, wherein the only inputs to the apparatus are through the chamber and the interface port to the drive mechanism.
Abstract:
A scalable process and device for producing a bio molecule, in particular pharmaceutical grade plasmid DNA is described. The process includes the steps of alkaline lysis, neutralization and clarification and can be further extended. For separating the lysate and the precipitate an improved floatation method is disclosed. This method is based on attachment of CO2 bubbles on the precipitate floe. The CO2 is released from a carbonate salt during or after neutralization (acidification). The method of the invention is preferably carried out in an automated continuous mode applying devices for lysis and neutralization and a novel device for completely continuous clarification (separation of floes and clarified lysate).
Abstract:
The current invention provides a method for directly converting histopathologically processed biological samples, tissues, and cells into a multi-use biomolecule lysate. This method allows for simultaneous extraction, isolation, solublization, and storage of all biomolecules contained within the histopathologically processed biological sample, thereby forming a representative library of said sample. This multi-use biomolecule lysate is dilutable, soluble, capable of being fractionated, and used in any number of subsequent experiments.
Abstract:
The present invention relates to a method for isolating and purifying nucleic acids, preferably comprising genomic DNA, from biological samples comprising the steps of lysing the sample using a lysis buffer comprising a source of anionic surfactant ions, optionally disintegrating the RNA present in the lysate, precipitating the surfactant ions from the lysate, and separating the nucleic acids from the precipitate and further contaminants by size-exclusion chromatography. The invention furthermore relates to a lysis buffer, a method of lysing cells and a kit for the isolation and purification of nucleic acids.