摘要:
The present invention relates generally to the field of magnetic resonance imaging and, more particularly, to devices and methods used in the observation of the diffusion of molecules across a permeable membrane using magnetic resonance techniques. A typical embodiment of the invention is a method of observing the diffusion of a molecule in a container having a permeable membrane that is disposed between a first solution and a second solution in the container, by using magnetic resonance imaging to obtain an image of the diffusion of the molecule in the first solution across the membrane in to the second solution.
摘要:
A magnetic resonance (MR) microscope and a dual-mode optic and MR microscope system are disclosed. The MR microscope is provided with a horizontal stage above which a sample to be analyzed is located, a radiofrequency coil assembly located above the horizontal stage and below the sample, a magnetic field gradient module located under the horizontal stage, and a heat exchange unit thermally coupled to the magnetic field gradient module and located under the magnetic field gradient module. The dual-mode optic and MR microscope system is provided with an MR microscope and an optical microscope, the optical microscope comprising a mirror located above the sample.
摘要:
A magnetic resonance (MR) microscope and a dual-mode optic and MR microscope system are disclosed, The MR microscope is provided with a horizontal stage above which a sample to be analyzed is located, a radiofrequency coil assembly located above the horizontal stage and below the sample, a magnetic field gradient module located under the horizontal stage, and a heat exchange unit thermally coupled to the magnetic field gradient module and located under the magnetic field gradient module. The dual-mode optic and MR microscope system is provided with an MR microscope and an optical microscope, the optical microscope comprising a mirror located above the sample
摘要:
The methods described herein are methods to ascertain motion contrast within optical coherence tomography data based upon phase variance. The phase variance contrast observes the nanometer scale motion of scatterers associated with Brownian motion and other non-flow motion. The inventive method of calculating motion contrast from the phase variance can differentiate regions of different mobility based on the motion contrast differences, and can use the phase information to characterize mobility properties of the scatterers. In flow regions, the inventive method for acquiring and analyzing motion contrast can identify the regions as well as characterize the motion. Furthermore, the inventive method can determine quantitative flow estimation, the index of refraction variations, and absorption variations within flow regions.
摘要:
The methods described herein are methods to ascertain motion contrast within optical coherence tomography data based upon phase variance. The phase variance contrast observes the nanometer scale motion of scatterers associated with Brownian motion and other non-flow motion. The inventive method of calculating motion contrast from the phase variance can differentiate regions of different mobility based on the motion contrast differences, and can use the phase information to characterize mobility properties of the scatterers. In flow regions, the inventive method for acquiring and analyzing motion contrast can identify the regions as well as characterize the motion. Furthermore, the inventive method can determine quantitative flow estimation, the index of refraction variations, and absorption variations within flow regions.
摘要:
The methods described herein are methods to ascertain motion contrast within optical coherence tomography data based upon phase variance. The phase variance contrast observes the nanometer scale motion of scatterers associated with Brownian motion and other non-flow motion. The inventive method of calculating motion contrast from the phase variance can differentiate regions of different mobility based on the motion contrast differences, and can use the phase information to characterize mobility properties of the scatterers. In flow regions, the inventive method for acquiring and analyzing motion contrast can identify the regions as well as characterize the motion. Furthermore, the inventive method can determine quantitative flow estimation, the index of refraction variations, and absorption variations within flow regions.
摘要:
Micro-cavity resonant sensors have outer surfaces that are functionalized using click chemistry, e.g., involving a cycloaddition reaction of an alkyne functional group and an azide functional group. A first polymer linking element binds to an outer surface of the micro-cavity and has an azide functional group, which bonds to an alkyne functional group of a second polymer linking element as a result of a cycloaddition reaction. A functionalization element such as an antibody, antigen or protein for sensing a target molecule is bound to the second linking element.
摘要:
The present invention relates to the use of fluorescently labeled nucleic acid probes to identify and image analytes in a biological sample. In the preferred embodiments, a probe is provided that comprises a target region able to specifically bind an analyte of interest and an initiator region that is able to initiate polymerization of nucleic acid monomers. After contacting a sample with the probe, labeled monomers are provided that form a tethered polymer. Triggered probes and self-quenching monomers can be used to provide active background suppression.
摘要:
A biofunctionalized nanoelectromechanical device (BioNEMS) for sensing single-molecules in solution by measuring the variation in the mechanical displacement of the BioNEMS device during a binding event is provided. The biofunctionalized nanoelectromechanical device according to the invention generally comprises a nanomechanical mechanical resonator, a detector integral with the mechanical resonator for measuring the mechanical displacement of the resonator, and electronics connected to the detector for communicating the results to a user. A system of biofunctionalized nanoelectromechanical devices and a method for utilizing the biofunctionalized nanoelectromechanical device of the present invention are also provided.
摘要:
Micro-cavity gas or vapor sensors and gas or vapor detection methods. Optical energy is introduced into a resonant micro-cavity having a deformable coating such as a polymer. The coating swells or expands when it is exposed to or absorbs a gas or vapor, thereby changing the resonant wavelength of optical energy circulating within the micro-cavity/coating. Expansion or swelling of the coating may be reversible such that it contracts when gas or vapor diffuses from the coating. The coating deformation and/or a change of one or more optical properties of the optical energy circulating within the micro-cavity are used to detect the presence of the gas or vapor or molecules or particulates thereof