摘要:
In one aspect, the present invention provides methods, devices, and systems for ensuring that multiple components of a mixture are fully mixed in a continuous flow microfluidic system while ensuring that mixing between segments flowing through the chip is minimized. In some embodiments, the present invention includes mixing fluids in a droplet maintained at the tip of a pipette before the mixture is introduced to the microfluidic device. In another aspect, the present invention provides a pipette tip having a ratio of an outside diameter to an inside diameter that provides sufficient surface area for a droplet comprising up to the entire volume of the liquid to suspend from the pipette tip intact. In yet another aspect, the present invention provides methods, devices, and systems for delivering a reaction mixture to a microfluidic chip comprising a docking receptacle, an access tube and a reservoir.
摘要:
In one aspect, the present invention provides methods, devices, and systems for ensuring that multiple components of a mixture are fully mixed in a continuous flow microfluidic system while ensuring that mixing between segments flowing through the chip is minimized. In some embodiments, the present invention includes mixing fluids in a droplet maintained at the tip of a pipette before the mixture is introduced to the microfluidic device. In another aspect, the present invention provides a pipette tip having a ratio of an outside diameter to an inside diameter that provides sufficient surface area for a droplet comprising up to the entire volume of the liquid to suspend from the pipette tip intact. In yet another aspect, the present invention provides methods, devices, and systems for delivering a reaction mixture to a microfluidic chip comprising a docking receptacle, an access tube and a reservoir.
摘要:
The present invention relates to systems and methods for the real time processing of nucleic acid during polymerase chain reaction (PCR) and thermal melt applications. According to an aspect of the invention, a system for the rapid serial processing of multiple nucleic acid assays is provided. In one embodiment, the system includes, but is not limited to: a microfluidic cartridge having microfluidic (flow-through) channels, a fluorescence imaging system, a temperature measurement and control system; a pressure measurement and control system for applying variable pneumatic pressures to the microfluidic cartridge; a storage device for holding multiple reagents (e.g., a well-plate); a liquid handling system comprising at least one robotic pipettor for aspirating, mixing, and dispensing reagent mixtures to the microfluidic cartridge; systems for data storage, processing, and output; and a system controller to coordinate the various devices and functions.
摘要:
In one aspect, the present invention provides methods, devices, and systems for ensuring that multiple components of a mixture are fully mixed in a continuous flow microfluidic system while ensuring that mixing between segments flowing through the chip is minimized. In some embodiments, the present invention includes mixing fluids in a droplet maintained at the tip of a pipette before the mixture is introduced to the microfluidic device. In another aspect, the present invention provides methods, devices, and systems for creating segments that move through a microfluidic chip with minimal mixing between segments. The microfluidic chip may have an interface chip and a reaction chip. In some embodiments, the present invention includes creating segments that flow through an interface chip and a reaction chip, wherein the interface chip and a reaction chip have separate flow control mechanisms and produce minimal mixing between segments.
摘要:
The present invention relates generally to systems and methods for the rapid serial processing of multiple nucleic acid assays. More particularly, the present invention provides for the real time processing of nucleic acid during polymerase chain reaction (PCR) and thermal melt applications. According to an aspect of the invention, a system for the rapid serial processing of multiple nucleic acid assays is provided. In one embodiment, the system includes, but is not limited to: a microfluidic cartridge having microfluidic (flow-through) channels, a fluorescence imaging system, a temperature measurement and control system; a pressure measurement and control system for applying variable pneumatic pressures to the microfluidic cartridge; a storage device for holding multiple reagents (e.g., a well-plate); a liquid handling system comprising at least one robotic pipettor for aspirating, mixing, and dispensing reagent mixtures to the microfluidic cartridge; systems for data storage, processing, and output; and a system controller to coordinate the various devices and functions.
摘要:
A method and device for digital multiplex PCR assays employ a microfluidic chip for performing real-time, continuous flow PCR within microchannels of the chip. A stream of sample material is introduced into each microchannel and alternating boluses of assay-specific reagents and buffer are introduced into the stream to form sequentially configured test boluses. A PCR procedure is performed on the test boluses followed by a thermal melt procedure. During the thermal melt procedure, fluorescent output is detected and fluorescence vs temperature data is collected and compared to expected normal correlations. The results, positive or negative, are converted to digital format, with positive results designated as “1” and negative results designated as “0”, or vice versa.
摘要:
The present invention provides novel methods and devices that employ microfluidic technology to generate molecular melt curves. In particular, the devices and methods in accordance with the invention are useful in providing for the analysis of PCR amplification products.
摘要:
The present invention provides a method for performing thermal melt analysis using a microfluidic device, the method comprising providing a microfluidic device having at least one microfluidic channel, introducing fluid comprising into the at least one microfluidic channel, continuously flowing the fluid through the at least one microfluidic channel while varying the temperature of the entire fluid stream as it moves through the at least one microfluidic channel by uniformly heating the entire fluid stream, and measuring, while continuously flowing the fluid through the at least one microfluidic channel, a detectable property emanating from the fluid,
摘要:
The present invention provides novel methods and devices that employ microfluidic technology to generate molecular melt curves. In particular, the devices and methods in accordance with the invention are useful in providing for the analysis of PCR amplification products.
摘要:
An assembly for performing micro-fluidic assays includes a micro-fluidic chip with access ports and micro-channels in communication with the access ports and a fluid cartridge having internal, fluid-containable chambers and a nozzle associated with each internal chamber that is configured to be coupled with an access port. Reaction fluids, such as sample material, buffer, and/or reagent, contained within the cartridge are dispensed from the cartridge into the access ports and micro-channels of the micro-fluidic chip. Embodiments of the invention include a cartridge which includes a waste compartment for receiving used DNA and other reaction fluids from the micro-channel at the conclusion of the assay.