摘要:
A technique is presented for aligning, in a desired region within a flow chamber of a flow cell, a non-spherical biological entity carried in a sample. The flow chamber has a rectangular cross-section. A bottom flow input module, a top flow input module and a sample input module provide a first fluid, a second fluid, and the sample, respectively, to the flow chamber. The first and the second fluids laminarly flow along a bottom and a top wall of the flow chamber and the sample laminarly flows sandwiched between them. By controlling rate of flow of the first and/or the second fluid the sample flow, and thus the non-spherical biological entity, is focused in the desired region. An acoustic transducer generates a standing acoustic wave having pressure node linearly arranged along an axis passing through the desired region to orient the non-spherical biological entity in the desired region.
摘要:
A method and system for improving throughput of a fluidic system such as a biopolymer analysis system by cleaning accumulated or clogging biopolymer from the fluidic system is disclosed. The method and system utilize a light energy source to photocleave the biopolymer molecules that may accumulate or aggregate in the fluidic system or clog a passageway. The accumulated biopolymer may be exposed to a light energy source for a sufficient period of time such that the biopolymer molecule is dosed with sufficient energy to photocleave the biopolymer molecules, thereby restoring the efficiency of and flow through the system.
摘要:
Methods and apparatus for manipulation of charged molecules in solution. More particularly, the invention provides nanofluidic CCD arrays that are capable of manipulate one or a group of molecules on an individual bases such that they undergo controlled physical and/or chemical movements and/or transformations. The nanofluidic apparatus and methods that are capable of individualized movement and controlled manipulation of a molecule or group of molecules in solution environment. A key feature of the nanofluidic CCD array technology disclosed herein is that molecules or nanoparticles, in particular DNA and other large biomolecules, can be individually manipulated and moved to spatially distinctive parts of the nanofluidic device, without the use of electrophoresis or pressure. A nanofluidic CCD array can be constructed such that different regions of the array have different biochemical activities. Different DNA molecules in a single nanofluidic device can be addressed and treated individually, all without the use of valves.
摘要:
The invention provides in part a device for preparing a fluid sample, including but not limited to a sample comprising genomic DNA. The invention also provides in part structures and methods that allow polymers of any length, including nucleic acids, to be stretched into a long, linear conformation for further analysis. The invention also provides in part devices and methods for improving labeling of nucleic acids including intercalation of nucleic acids using for example mono intercalators such as mono cyanine intercalators. The invention also provides in part methods for analyzing populations nucleic acids including nucleic acids from different subjects or different samples such as bacteria in biomes, and for identifying nucleic acids present in such populations. A non-limiting example is an analysis of bacteria in biomes. Another example is an analysis of DNA from different human subjects.
摘要:
Among others, the present invention provides apparatus for detecting circulating tumor cells, comprising a system delivery biological subject and a probing and detecting device, wherein the probing and detecting device includes a first micro-device and a first substrate supporting the first micro-device, the first micro-device contacts a biologic material to be detected and is capable of measuring at the microscopic level an electrical, magnetic, electromagnetic, thermal, optical, acoustical, biological, chemical, electro-mechanical, electro-chemical, electro-optical, electro-thermal, electro-chemical-mechanical, bio-chemical, bio-mechanical, bio-optical, bio-thermal, bio-physical, bio-electro-mechanical, bio-electro¬ chemical, bio-electro-optical, bio-electro-thermal, bio-mechanical-optical, bio-mechanical thermal, bio-thermal-optical, bio-electro-chemical-optical, bio-electro-mechanical-optical, bio-electro-thermal-optical, bio-electro-chemical-mechanical, physical or mechanical property, or a combination thereof, of the biologic subject.
摘要:
Composition of microfluidic flowcell and methods of using microfludic flowcell are provided. Microfluidic flowcell includes a plurality of nucleic acid arrays wherein a nucleic acid array comprises a fluid lipid bilayer on a solid support, a geometric barrier disposed in the lipid bilayer, and at least one nucleic acid attached to the lipid bilayer. Method for analyzing nucleic acid and the interaction between nucleic acid and protein using microfludic flowcell are provided.
摘要:
Methods of analyzing features such as the physical size of macromolecules or biomarkers along large genomic DNA molecules were disclosed as well as the devices for carrying out such high throughput analysis in a massively parallel fashion. Methods of fabricating such devices are also disclosed.
摘要:
Methods, devices, and compositions are described that provide for amplification of nucleic acid sequences without reliance upon temperature cycling, thus freeing the methods from conventional benchtop thermal cycling devices. Denaturation of double stranded nucleic acids, primer annealing, and precision control over primer extension by polymerase can be accomplished by applying stress to a nucleic acid. These methods can provide one ore more benefits over conventional PCR methods including: precision control over the PCR process; generally improved fidelity; improved accuracy over problematic sequences such as GC-rich or tandem repeat regions; greater sequence length; increased reaction yield; reduced experimental time; greater efficiency; lower cost; greater portability; and, robustness to various environmental parameters, such as temperature, pH, and ionic strengths.
摘要:
A microfluidic device for altering the flow of a carrier fluid containing a polymer, such that, the polymer can be positioned, aligned, or elongated. The device accomplishes these effects by directing the carrier fluid in a laminar flow into obstacles, or other fluids to knowingly alter the path of the carrier fluid streamlines. These streamlines, in turn, apply fluidic drag forces against the polymer to manipulate it into a desired configuration. Other aspects of the device retain a polymer in an aligned or elongated state with crimps which prevent portions of the polymer from coiling. These structures utilize the natural concept of increasing entropy to allow small portions of an aligned or elongated polymer to return to a high entropy, or coiled state, while retaining the majority of the polymer in a low entropy, aligned or elongated state for subsequent analysis or manipulation.
摘要:
The present invention relates to the field of molecular diagnostics, and in particular to diagnostics based on a liquid crystal assay format. In particular, the present invention provided improved substrates and methods of using liquid crystal assays for quantitating the amount of an analyte in a sample. The present invention also provides materials and methods for detecting non-specific binding of an analyte to a substrate by using a liquid crystal assay format.