SEALED MAGIC ANGLE SPINNING NUCLEAR MAGNETIC RESONANCE PROBE AND PROCESS FOR SPECTROSCOPY OF HAZARDOUS SAMPLES
This invention is a magic-angle-spinning (MAS) nuclear magnetic resonance (NMR) probe with a unique sealed and filtered sample compartment. The modular two-layer compartment was conceived to ensure secure, efficient containment of hazardous samples while preserving convenience of operation and state-of-the-art NMR performance. High resolution NMR experiments on solid samples typically require the flow of large volumes of gas at high pressures (> 50 psi) to spin rotors containing the sample. Under conditions of high gas flow, dispersal of a hazardous sample can occur through leaks or failure of the rotor. The containment system described here allows high pressure gas to flow into the compartment to spin the sample, while providing a securely filtered exit port to vent the gas. Even in the event of a failure of the rotor, such a compartment will prevent the dispersal of sample outside the containment area. The modular design allows the sample compartment to be separated from the rest of the probe for convenient cleanup, disposal, or contamination checks. In addition to its protective function, the sealed compartment can also be used to maintain a sample in an inert atmosphere during MAS NMR experiments. This is in contrast to standard MAS NMR probes, which are usually well ventilated and open to the atmosphere in order to allow the free flow of gases.
SYSTEM AND METHOD OF PRECONCENTRATING ANALYTES IN A MICROFLUIDIC DEVICE
A method and system for preconcentrating analytes at a microvalve in a microfluidic device is disclosed. The system includes a sample channel loaded with a sample solution. The sample channel includes a semi-permeable membrane microvalve. An electric potential is applied at or across the microvalve to preconcentrate the sample solution when the microvalve is closed. The method includes pretreatments of the device or valve for preconcentration of the analytes. For preconcentration of anionic analytes, the device is baked. For preconcentration of the cationic analytes, the surface of the membrane microvalve is coated with a polycationic coating, and the device is baked.
Ion manipulation method and device
An ion manipulation method and device is disclosed. The device includes a pair of substantially parallel surfaces. An array of inner electrodes is contained within, and extends substantially along the length of, each parallel surface. The device includes a first outer array of electrodes and a second outer array of electrodes. Each outer array of electrodes is positioned on either side of the inner electrodes, and is contained within and extends substantially along the length of each parallel surface. A DC voltage is applied to the first and second outer array of electrodes. A RF voltage, with a superimposed electric field, is applied to the inner electrodes by applying the DC voltages to each electrode. Ions either move between the parallel surfaces within an ion confinement area or along paths in the direction of the electric field, or can be trapped in the ion confinement area.
SYSTEM AND METHOD OF DETECTING AND ANALYZING A THREAT IN A CONFINED ENVIRONMENT
A system and method of detecting and analyzing a threat in a confined environment is disclosed. An audio board detects and analyzes audio signals which are then transmitted and analyzed to determine the location of a gunshot in a confined location and the type of firearm being shot.
MICROFLUIDIC ELECTROCHEMICAL DEVICE AND PROCESS FOR CHEMICAL IMAGING AND ELECTROCHEMICAL ANALYSIS AT THE ELECTRODE-LIQUID INTERFACE IN-SITU
A microfluidic electrochemical device and process are detailed that provide chemical imaging and electrochemical analysis under vacuum at the surface of the electrode-sample or electrode-liquid interface in-situ. The electrochemical device allows investigation of various surface layers including diffuse layers at selected depths populated with, e.g., adsorbed molecules in which chemical transformation in electrolyte solutions occurs.
Ultrasonic Characterization of Solid Liquid Suspensions
This invention describes noninvasive ultrasonic techniques to determine the particle size, density and solids concentration in slurries. The unique approach utilizes ultrasonic backscattering, diffuse fields, and attenuation measurements. Specifically, for the first time the measurements are utilized to elucidate the physical properties of the solid-liquid suspension by calculating a single parameter for direct comparison between all the above measurements.
Multipass Optical Device and Process for Gas and Analyte Determination
The invention provides a means for obtaining a long-path-length absorption path for trace gas monitoring using a monlithic ring toric cavity. The ring toric cell provides a stable, modular method of constructing an absorption cell that is insensitive to shock and vibration, and can provide a long path length in a compact volume.
Extracting dependencies between network assets using deep learning
A network analysis tool receives network flow information and uses deep learningmachine learning that models high-level abstractions in the network flow informationto identify dependencies between network assets. Based on the identified dependencies, the network analysis tool can discover functional relationships between network assets. For example, a network analysis tool receives network flow information, identifies dependencies between multiple network assets based on evaluation of the network flow information, and outputs results of the identification of the dependencies. When evaluating the network flow information, the network analysis tool can pre-process the network flow information to produce input vectors, use deep learning to extract patterns in the input vectors, and then determine dependencies based on the extracted patterns. The network analysis tool can repeat this process so as to update an assessment of the dependencies between network assets on a near real-time basis.
NUCLEAR REACTOR ASSEMBLIES, NUCLEAR REACTOR TARGET ASSEMBLIES, AND NUCLEAR REACTOR METHODS (iEdison No. 0685901-16-0012)
Reactor target assemblies are provided that can include a housing defining a perimeter of at least one volume and Np or Am spheres within the one volume. Reactor assemblies are provided that can include a reactor vessel and a bundle of target assemblies within the reactor vessel, at least one of the target assemblies comprising a housing defining a volume with Np or Am spheres being within the volume. Irradiation methods are also provided that can include irradiating Np or Am spheres within a nuclear reactor, then removing the irradiated spheres from the reactor and treating the irradiated spheres.