摘要:
Methods are provided for the fabrication of microscale, including micron and sub-micron scale, including nanoscale, devices. Electronic transport of movable component devices is utilized through a fluidic medium to effect transport to a desired target location on a substrate or motherboard. Forces include electrophoretic force, electroosmotic force, electrostatic force and/or dielectrophoretic force. In the preferred embodiment, free field electroosmotic forces are utilized either alone, or in conjunction with, other forces. These forces may be used singly or in combination, as well as in conjunction with yet other forces, such as fluidic forces, mechanical forces or thermal convective forces. Transport may be effected through the use of driving electrodes so as to transport the component device to yet other connection electrodes. In certain embodiments, the component devices may be attached to the target device using a solder reflow step.
摘要:
This invention pertains to the design, fabrication, and uses of an electronic system which can actively carry out and control multi-step and multiplex reactions in macroscopic or microscopic formats. In particular, these reactions include molecular biological reactions, such as nucleic acid hybridizations, nucleic acid amplification, sample preparation, antibody/antigen reactions, clinical diagnostics, combinatorial chemistry and selection, drug screening, oligonucleotide and nucleic acid synthesis, peptide synthesis, biopolymer synthesis, and catalytic reactions. A key feature of the present invention is the ability to control the localized concentration of two or more reaction-dependant molecules and their reaction environment in order to greatly enhance the rate and specificity of the molecular biological reaction
摘要:
A method for electronically stabilizing hybridization of nucleic acids bound at a test site of a microelectronic device is described. First and second negatively charged nucleic acids are provided, the second nucleic acid being bound to the test site. A zwitterionic buffer having a conductance of less than 100 mS/cm is applied to the microelectronic device. A current is applied to the test site to positively bias the test site, such that the first negatively charged nucleic acid is transported to the positively biased test site having the bound the second negatively charged nucleic acid. At the test site, the first and second negatively charged nucleic acids hybridize. The zwitterionic buffer acquires a net positive charge under influence of the current, such that the positively charged zwitterionic buffer stabilizes the hybridization by reducing the repulsion between the first and second negatively charged nucleic acids
摘要翻译:描述了用于电子稳定在微电子器件的测试位点处结合的核酸杂交的方法。 提供第一和第二带负电荷的核酸,第二核酸与测试部位结合。 将具有小于100mS / cm 2的电导的两性离子缓冲液施加到微电子器件。 将电流施加到测试部位以使测试部位正偏置,使得将第一带负电荷的核酸转运到具有结合第二带负电荷核酸的正偏压测试位点。 在测试位点,第一和第二带负电荷的核酸杂交。 两性离子缓冲液在电流影响下获得净正电荷,使得带正电的两性离子缓冲液通过降低第一和第二带负电的核酸之间的排斥来稳定杂交
摘要:
The invention relates to methods and devices for remote or distributed continuous monitoring of physiologically relevant states. The invention provides for methods to automatically detect deviations or other states in physiological parameters and automatically alert a measured subject, user or other authorized party. The device provides for a universal platform for sensors, and further provides for the automatic compensation or distribution of devices or bioactive agents at appropriate levels and/or intervals in response to deviations or other states sensed in various physiological parameters.
摘要:
Described and disclosed are devices, methods, and compositions of matter for the multiplex amplification and analysis of nucleic acid sequences in a sample using novel strand displacement amplification technologies in combination with bioelectronic microchip technology. Specifically, a nucleic acid in a sample is amplified to form amplicons, the amplicons are addressed to specified electronically addressable capture sites of the bioelectronic microchip, the addressed amplicons are captured and labeled, and then the capture sites are analyzed for the presence of label. Samples may be amplified using strand displacement amplification. The invention is also amenable to other amplification methodologies well known by those skilled in the art. The capture and label steps may be by a method of universal capture with sequence specific reporter, or by a method of sequence specific capture with universal reporter. The label may be detected by fluorescence, chemiluminescence, elecrochemiluminescence, or any other technique as are well known by those skilled in the art. This invention further allows for analyzing multiple nucleic acid targets on a single diagnostic platform wherein the nucleic acids may be amplified while either in direct contact with microchip components or in solution above the microchip array.
摘要:
Systems and techniques are provided for monitoring hydration. In one implementation, a method includes measuring an electrical impedance of a region of a subject to generate an impedance measurement result. The result may be correlated with a blood loss condition.
摘要:
A structure for and method of manufacture of structures for implantation within the tissue of a mammalian subject are disclosed. These structures can be utilized in applications such as the delivery of therapeutic drugs to the tissue of the subject or the sampling of biofluids for the purposes of diagnosis. In one embodiment of the invention, a rigid structure has defined ingrowth features on a surface intended to contact tissue of the subject and defined passage features which provide a fluid path from the surface intended to contact tissue to another surface. The dimensions of these defined features vary based on the particular application, as the ingrowth features are of a dimension and spacing to promote ingrowth of the surrounding tissue, and the passage features are of a dimension to inhibit the passage through the structure of cells from the surrounding tissue.
摘要:
The invention relates to a parenteral therapeutic agent delivery device. The therapeutic agent delivery device has a disposable section and an implant section suitable for long term implantation within the tissue of a subject. When necessary, the disposable section can be detached from the implant section, and a new disposable section can be attached. The disposable section may contain a reservoir containing the therapeutic agent, a pump for dispensing the therapeutic agent, controlling circuitry for regulating the dispensing of the therapeutic agent, and transceiver circuitry and an antenna for wireless communication with external devices.
摘要:
Aspects include methods and apparatuses for determining change over time in one or more measured regions of a body using a plurality of data sets obtained by analysis of applied signals to said region. The method may include transmitting and receiving one or more of electromagnetic wave signals, applied acoustic wave signals and electrical signals transmitted through or reflected off of a portion of the measured body region.
摘要:
A method for encapsulating biologics within a hydrogel by using an aqueous solution of an isocyanate-functional polyurethane prepolymer which is mixed with an amount of biologics and an aqueous solution containing a dithiol crosslinking agent under physiological pH conditions to create a hydrogel. An additional bidentate crosslinking agent is optionally included. The product of such method may be a bioreactor or an assay device having a plurality of different biologics encapsulated at predetermined locations in a substrate.