摘要:
Disclosed is an electrostatic aerosol concentrator for the concentration of aerosol particles and their collection for subsequent analysis. The concentrator comprises an airflow chamber that includes alternately energized and grounded electrode elements that work in concert to impart radial inward motion to charged aerosol particles and focusing them toward an enriched aerosol outlet. If desired, filtered air inlets may be used to provide a sheath of aerosol-free air along the chamber periphery and prevent deposition of particles onto electrode surfaces. Aerosol particles entering the airflow chamber may carry a positive or negative charge naturally, or a charge may be induced on the particles using a charging section located upstream of the aerosol inlet. Natural or induced charges on the aerosol particles may be used to selectively concentrate subpopulations of aerosol particles from a mixture of particles. For example, bacterial spores or aerosolized viruses may be selectively enriched without concentrating other aerosol particles. The particles of interest are focused and collected at an aerosol rich outlet in a small air volume, while the majority of the airflow, stripped of particles of interest, is purged to the atmosphere through an aerosol lean outlet.
摘要:
Flavor encapsulation is generally performed by mixing flavor with a prolamin solution and drying the mixture into powdered forms of encapsulated flavor. In one embodiment, flavor and zein are separately dispersed in an alcohol-water mixture of appropriate ratio prior to mixing. In another embodiment, an aqueous food comprising bioactive components is mixed with the prolamin solution, thereby initiating precipitation of the prolamin and concentration of the bioactive components in said aqueous food. Resulting powdered forms of encapsulated flavor comprise the bioactive components from the aqueous food. In another embodiment, a two-phase drying process may be employed comprising removal of alcohol for evaporation-induced-self-assembly of zein microstructures, followed by removal of remaining water to produce said powdered form.
摘要:
A method and apparatus is provided for magnetic source magnetic resonance imaging. The method includes collecting energy signals from an object, providing additional information of characteristics of the object, and generating the image of the object from the energy signals and from the additional information such that the image includes a representation of a quantitative estimation of the characteristics, e.g a quantitative estimation of magnetic susceptibility. The additional information may comprise predetermined characteristics of the object, a magnitude image generated from the object, or magnetic signals collected from different relative orientations between the object and the imaging system. The image is generated by an inversion operation based on the collected signals and the additional information. The inversion operation minimizes a cost function obtained by combining the data extracted from the collected signals and the additional information of the object. Additionally, the image is used to detect a number of diagnostic features including microbleeds, contract agents and the like.
摘要:
A sensor, and methods of making, for determining the concentration of an analyte, such as glucose, in a biological fluid such as blood or serum, using techniques such as coulometry, amperometry, and potentiometry. The sensor includes a working electrode and a counter electrode, and may include an insertion monitoring trace to determine correct positioning of the sensor in a connector. The sensor is calibration-adjusted, eliminating the need for a user to enter a calibration code or for the meter to read a calibration code.
摘要:
Synthesizers are configured with first and second phase-locked loops (PLL's). The first PLL is arranged to include a digitally-controlled oscillator (DCO) and to respond to an input signal to provide a reference signal with a plurality of selectable reference frequencies. The second PLL is arranged to include a voltage-controlled oscillator (VCO) to thereby provide output signals in response to the reference signal. This synthesizer structure is particularly effective when responding to a noisy input signal as may be the case, for example, in wireless communication systems that provide a network clock to transceivers through lengthy optical links.
摘要:
The present disclosure provides an orientation-nonspecific sensor port for use in analyte meters designed to detect and quantify analyte levels in a fluid sample along with methods of using the same. The present disclosure also provides compositions and methods for facilitating the correct insertion of a sensor into a corresponding analyte meter.
摘要:
In vitro analyte sensors and methods of analyte determination are provided. Embodiments include sensors that include a pair of electrodes to monitor filling of the sample chamber with sample.
摘要:
Standard SNMP error reporting between a network element and a management system utilizes a set of standard error codes that provide limited information about a fault condition. Example embodiments of the invention provide reporting of an extended error code that provides information for locating the source of a fault condition and for debugging the fault condition. In response to a first request, the extended error code can be reported to a management system. In response to a request following the extended error code, meanings associated with the extended error code are reported to a management system, thereby informing a network administrator of the fault condition.