34 results about "Tagged particle" patented technology

A method and an apparatus for monitoring a material includes adding tagging particles to the material, sensing the tagging particles in the material for an even distribution throughout the material, forming a part from the material if the tagging particles are evenly distributed throughout the material, sensing the tagging particles in the part to determine a physical characteristic of the part, placing the part in operation if the determined physical characteristic is within a predetermined specification, sensing the tagging particles in the part during operation to detect at least one of wear and damage to the part, and generating an indication to a user upon detection of the at least one of wear or damage to the part.

Arrays of spin-valve elements that can be selectively activated to trap, hold, manipulate and release magnetically tagged biological and chemical particles, including molecules and polymers. The spin-valve elements that can be selectively activated and deactivated by applying a momentary applied magnetic field thereto. The spin valve element array can be used for selectively sorting and transporting magnetic particles one particle at a time within the array. As the magnetically tagged particles are held by the spin-valve elements, application of an auxiliary magnetic field can be used to apply tension or torsion to the held particles or to move, e.g. rotate, the trapped particles. The arrays of spin-valve elements can be used in a variety of applications including drug screening, nucleic acid sequencing, structural control and analysis of RNA / DNA and protiens, medical diagnosis, and magnetic particle susceptibility and size homogenization for other medical applications.

The present invention relates to the automatic analysis and identification of different species of particles in a liquid sample using both fluorescent tagging and magnification techniques. A light source at a first wavelength is used to induce the tagged particles to emit light at a second wavelength, while the image thereof is captured on a pixel array of a digital camera. A second camera can be used to capture an image of the particles illuminated at the first wavelength, which is separated from the second wavelength by an optical filter. Alternatively, a second light source emitting pulses of light at the second wavelength, which alternate with the first light source.

There is provided a method for manufacturing a surface enhanced Raman scattering nano-tagging particle, the method including the steps of: introducing silver nanoparticles on the surface of a silica core particle; immobilizing tagging materials and silica shell precursors on the silver nanoparticles; and forming a silica shell surrounding the silica core particle to which the tagging materials and the silica shell precursor are immobilized.

The present invention relates generally to the fields of cell biology and laboratory diagnostics, and particularly to general compositions and of uniquely tagged particles linked to moieties of known properties and methods of making tagged, functionalized particles. Additionally, the invention relates to methods of screening a collection of tagged functionalized particles.

Portable systems for processing and analyzing biological or environmental samples as well as different configurations of chip-based flow cytometers are provided. The portable systems include an automated assay preparation module configured to process a sample into a fluid assay with fluorescently tagged particles and a microfluidic analysis module coupled to the fluid assay module, wherein the microfluidic analysis module includes a chip-based flow cytometer.

The invention discloses a casing leakage point depth detecting method and device for an oil extraction well. According to the method, after fluid in a wellbore of the oil extraction well reaches a quiescent state, tagged particles are added into the wellbore, and the moment t when the tagged particles are added is recorded; then a decompression valve is opened to enable the annular pressure at a casing leakage point of the oil extraction well to be lower than the wellbore pressure of the oil extraction well, the purpose that the tagged particles can be sprayed out through the leakage point in a casing along with the fluid in the wellbore at a fast speed and impact the inner wall of an intermediate casing and the outer wall of an oil-string casing is ensured, and then impact signals on the casing walls are collected; the impact signals are compared and analyzed in real time through a computer, and the moment t1 in the impacting signals including the signals of impacting of the tagged particles on the casing walls is recorded and judged; and then the distance from a well mouth of the oil extraction well to the leakage point of the casing is calculated according to the formula (please see the specifications for the formula), so that quick and effective depth detecting of the casing leakage point is achieved, complexity and high cost of casing leakage point depth detecting are lowered, and assistance is provided for safe production of the oil extraction well.