565 results about "Atomic number" patented technology

Perovskite-type catalyst consists essentially of a metal oxide composition is provided. The metal oxide composition is represented by the general formula A.sub.1-x B.sub.x MO.sub.3, in which A is a mixture of elements originally in the form of single phase mixed lanthanides collected from bastnasite; B is a divalent or monovalent cation; M is at least one element selected from the group consisting of elements of an atomic number of from 22 to 30, 40 to 51, and 73 to 80; and x is a number defined by 0.ltoreq.x<0.5.

The functional dependency of a first X-ray absorption value of density and atomic number is determined in the instance of a first X-ray spectrum, and at least the functional dependency of a second X-ray absorption value of density and atomic number is determined in the instance of a second X-ray spectrum. Based on a recording of a first distribution of X-ray absorption values of the object to be examined in the instance of a first X-ray spectrum, and on a recording of at least one second distribution of X-ray absorption values of the object to be examined in the instance of a second X-ray spectrum, the values for density and atomic number are determined by comparing the functional dependency of a first X-ray absorption value of the first distribution of X-ray absorption values with the functional dependency(ies) of the X-ray absorption values, which are assigned to the first X-ray absorption value, of the second and / or other distributions of X-ray absorption values.

One aspect of the present invention relates to a microsphere, comprising a hydrophilic polymer comprising a plurality of pendant anionic groups; a transition-metal, lanthanide or group 13-14 metal oxide, polyoxometalate or metal hydroxide or combination thereof; and a first radioisotope that emits a therapeutic β-particle. In certain embodiments, the microsphere further comprsies a second radioisotope that emits a diagnostic γ-ray; wherein the atomic number of the first radioisotope is not the same as the atomic number of the second radioisotope. In certain embodiments, the microsphere is composed of polymer impregnated with zirconia bound to 32p as the source of the therapeutic β-emissions and 67Ga as the source of the diagnostic γ-emissions. Another aspect of the present invention relates to the preparation of a microsphere impregnated with a radioisotope that emits therapeutic β-particles and a radioisotope that emits diagnostic β-emitting radioisotope and a γ-emitting radioistope; wherein the atomic number of the first radioisotope is not the same as the atomic number of the second radioisotope. In certain embodiments, said microspheres are administered to the patient through a catheter. In another embodiment, the microsphere is combined with the radioisotopes at the site of treatment.

In one embodiment, a method of examining contents of an object is disclosed comprising scanning an object at first and second radiation energies, detecting radiation at the first and second energies, and calculating a function of the radiation detected at the first and second energies, for corresponding pixels. A pixel is a projection of radiation through the object onto the detector. The first functions of a plurality of pixels are grouped and a second function of the group is analyzed to determine whether the object at least potentially contains material having an atomic number greater than the predetermined atomic number. The second function may be compared to a third function, which may be a threshold having a value based, at least in part, on material having a predetermined atomic number. Systems are also disclosed.

Apparatus and methods in which one or more elemental taggants that are intrinsically located in an object are detected by x-ray fluorescence analysis under vacuum conditions to identify or verify the object's elemental content for elements with lower atomic numbers. By using x-ray fluorescence analysis, the apparatus and methods of the invention are simple and easy to use, as well as provide detection by a non line-of-sight method to establish the origin of objects, as well as their point of manufacture, authenticity, verification, security, and the presence of impurities. The invention is extremely advantageous because it provides the capability to measure lower atomic number elements in the field with a portable instrument.

Quantum dots are positioned within a layered composite film to produce a plurality of real-time programmable dopants within the film. Charge carriers are driven into the quantum dots by energy in connected control paths. The charge carriers are trapped in the quantum dots through quantum confinement, such that the charge carriers form artificial atoms, which serve as dopants for the surrounding materials. The atomic number of each artificial atom is adjusted through precise variations in the voltage across the quantum dot that confines it. The change in atomic number alters the doping characteristics of the artificial atoms. The layered composite film is also configured as a shift register.

An x-ray source comprises a structured anode that has a thin top layer made of the desired target material and a thick bottom layer made of low atomic number and low density materials with good thermal properties. In one example, the anode comprises a layer of copper with an optimal thickness deposited on a layer of beryllium or diamond substrate. This structured target design allows for the use of efficient high energy electrons for generation of characteristic x-rays per unit energy deposited in the top layer and the use of the bottom layer as a thermal sink. This anode design can be applied to substantially increase the brightness of stationary, rotating anode or other electron bombardment-based sources where brightness is defined as number of x-rays per unit area and unit solid angle emitted by a source and is a key figure of merit parameter for a source.

A system and method for tooth whitening are disclosed wherein at least one peroxide-containing gel and at least one transition metal compound-containing gel, particularly at least one lower atomic number transition metal compound, more particularly at least a ferrous compound including gluconate, sulfate, nitrate, acetate or mixtures thereof, are applied to a patient's mouth. Gelling agent is also included. The activation of the peroxide whitens the patient's teeth. The system may be used with or without the application of light. The system further provides an additional gel including a sensitivity reduction compound including potassium nitrate, sodium nitrate or mixtures thereof for possible sensitivity treatment if needed.

In an X-ray generation apparatus of transmission type including an electron passage surrounded by and formed in an electron passage forming member, and generating an X-ray by colliding electrons having passed through the electron passage against a target, wherein the electron passage includes a secondary X-ray generation portion that generates an X-ray with collision of electrons reflected by the target against the secondary X-ray generation portion, the secondary X-ray generation portion and the target are arranged such that the X-ray generated with direct collision of the electrons against the target and the X-ray generated with the collision of the electrons reflected by the target against the secondary X-ray generation portion are both radiated to an outside, and an atomic number of a material of the electron passage forming member is larger than that of the target. X-ray generation efficiency is increased by effectively utilizing the electrons reflected by the target.

Disclosed herein is the use of differences in x-ray linear absorption coefficients to process ore and remove elements with higher atomic number from elements with lower atomic numbers. Use of this dry method at the mine reduces pollution and transportation costs. One example of said invention is the ejection of inclusions with sulfur, silicates, mercury, arsenic and radioactive elements from coal. This reduces the amount and toxicity of coal ash. It also reduces air emissions and the energy required to clean stack gases from coal combustion. Removal of said ejected elements improves thermal efficiency and reduces the pollution and carbon footprint for electrical production.

The application discloses systems and methods for X-ray scanning for identifying material composition of an object being scanned. The system includes at least one X-ray source for projecting an X-ray beam on the object, where at least a portion of the projected X-ray beam is transmitted through the object, and an array of detectors for measuring energy spectra of the transmitted X-rays. The measured energy spectra are used to determine atomic number of the object for identifying the material composition of the object. The X-ray scanning system may also have an array of collimated high energy backscattered X-ray detectors for measuring the energy spectrum of X-rays scattered by the object at an angle greater than 90 degrees, where the measured energy spectrum is used in conjunction with the transmission energy spectrum to determine atomic numbers of the object for identifying the material composition of the object.

A method of and a system for splitting a compound object using multi-energy CT data including a density and an atomic number measurements are provided. The method comprises: compound object detection; computing a two-dimensional DZ distribution of a compound object; identifying clusters within the DZ distribution; assigning a component label to each object voxel based on the DZ distribution clusters; and post-processing the set of voxels identified as belonging to each component.

The present invention relates to a nondestructive testing method of X-ray diffraction which is used for detecting the internal defect of a workpiece which is made of crystal material (including single-crystal materials and polycrystalline materials) or material which contains atoms arranged in sequence along the one-dimensional space, and a device thereof, in particular suitable for detecting the internal defect of the workpiece made of material which consists of atoms of low atomic number. The method adopts the nondestructive test to get the intensity distribution map of diffraction of materials in all internal parts of the tested workpiece; then the nondestructive test is adopted to analyze the internal defect, the defect type and distribution of the tested workpiece. The X-ray tube radiation of easily available heavy metal anode target, which can be industrialized and practically applied, can be used in the rapid nondestructive test of the internal defect and the defect type of aluminum and magnesium workpieces which have a thickness of a plurality of millimeters; and the spatial resolution is superior to the existing X-ray detection machine and X-ray CT.

An anode active material having a high discharge capacity and a superior capacity retention ratio during a charge-discharge cycle is provided. The anode active material includes an alloy material including an element M capable of being alloyed with Li and at least one kind of element R selected from elements with an atomic number of 20 or less, except for H, Li and a noble gas. As the element M, for example, Sn and at least one kind, such as, of Ni, Cu, Fe, Co, Mn, Zn, In and Ag are included. As the element R, B, C, Al, Si, P, S or the like is included. The anode active material can have a low-crystalline or amorphous structure by the element R, thereby Li can be smoothly inserted and extracted. The content of the element R is preferably within a range from about 10 wt % to about 50 wt %.

In one example, a method of examining contents of an object is disclosed comprising scanning an object by first and second radiation beams at at least first and second angles, detecting radiation at the first and second angles, and determining whether the object at least potentially comprises high atomic number material, which may be nuclear material or shielding material, based, at least in part, on the detected radiation. In one example, the detected radiation at both angles must be indicative of a region of high atomic number material by the presence of corresponding high density regions, in order for it to be concluded that high atomic number material that may be nuclear material may be present. The determination may be further based on the size of a high density region in one of the images. Systems are also disclosed.

A method and an apparatus for liquid safety-detection with a radiation source relate to a radiation detecting technology field. The main steps of the method of the invention are: an article to be detected being conveyed into an operation zone within a radiation shield field; the ray emitted from a radiation source passing through the article to be detected, and being received by a detector; the detector transmitting the received ray signal to a data collector; the data collector amplifying and forming the ray signal, and transmitting such data and the data collected by thickness measuring probing heads to a data processing computer; and the data processing computer processing the two groups of data to derive the density and atomic number of the detected liquid, comparing the result with the densities and atomic numbers of dangerous articles in a existing database, and displaying the detected information of the detected article. Comparing to the prior art, the invention is not subjected to the affection of the outside package of an article and has great anti-interference, and has the features of small volume, high accuracy of detection, easy shielding, and high use safety and reliability.

The invention discloses a synthetic aperture radar (SAR) tomography three-dimensional imaging method. According to the method, regularized orthogonal matching pursuit (ROMP) is combined with an SAR tomography three-dimensional imaging system, and height direction sparse signals are accurately reconstructed to realize height dimension focusing. When a measurement matrix strictly meets a restricted isometry property, any sparse signals can be accurately reconstructed by the method. By the imaging method, a sparse signal with the sparsity of k is subjected to iteration for k times to obtain a support set I of which the atomic number, namely absolute I is more than or equal to 2k, so that a height direction sparse signal is accurately reconstructed, the operation amount is small, and the operation efficiency is high; and moreover, observation vectors are sorted during iteration each time, the optimality of iteration is ensured and the reconstructing robustness is high.

There is provided an amorphous transparent conductive thin film with a low resistivity, a low absolute value for the internal stress of the film, and a high transmittance in the visible light range, an oxide sintered body for manufacturing the amorphous transparent conductive thin film, and a sputtering target obtained therefrom. An oxide sintered body is obtained by: preparing In2O3 powder, WO3 powder, and ZnO powder with an average grain size of less than 1 μm so that tungsten is at a W / In atomic number ratio of 0.004 to 0.023, and zinc is at a Zn / In atomic number ratio of 0.004 to 0.100; mixing the prepared powder for 10 to 30 hours; granulating the obtained mixed powder until the average grain size is 20 to 150 μm; molding the obtained granulated powder by a cold isostatic press with a pressure of 2 to 5 ton / cm2, and sintering the obtained compact at 1200 to 1500 degree.C. for 10 to 40 hours in an atmosphere where oxygen is introduced into the atmosphere of the sinter furnace at a rate of 50 to 250 liters / min per 0.1 m3 furnace volume.

Perovskite-type catalyst consists essentially of a metal oxide composition and methods of using them are provided. The metal oxide composition is represented by the general formula Aa−xBxMOb, in which A is a mixture of elements originally in the form of single phase mixed lanthanides collected from bastnasite; B is a divalent or monovalent cation; M is at least one element selected from the group consisting of elements of an atomic number of from 23 to 30, 40 to 51, and 73 to 80; a is 1 or 2; b is 3 when a is 1 or b is 4 when a is 2; and x is a number defined by 0≦x<0.5. Methods of making and using the perovskite-type catalysts are also provided. The perovskite-type catalyst may be used to reduce nitrogen oxides, oxidize carbon monoxide, and oxidize hydrocarbons in an exhaust stream from a motor vehicle. Methods of such a use are provided.

The application discloses systems and methods for determining an atomic number of a material being scanned by generating a predetermined number of transmission data samples, determining a variance of the transmission data samples, and determining the atomic number of the material being scanned by comparing the variance or a derivative of the variance of the transmission data samples to one or more predetermined variances. The application also discloses systems and methods for determining an atomic number of a material being scanned by deriving transmission signal samples of the material being scanned, determining a variance of the signal samples, and determining an atomic number of the material being scanned by comparing the variance of the signal samples, or a derivative of the variance, to one or more predetermined variances.

The invention discloses a multi-energy-spectrum CT imaging method and an imaging system. The multi-energy-spectrum CT imaging method comprises the following steps: scanning the object to be detected, and reconstructing the density image of a basic material so as to finally obtain the electron density and equivalent atomic number distribution of the object to be detected or linear attenuation coefficient distribution of the object under the radiation of mono-energetic X-rays. The multi-energy-spectrum CT reconstruction method comprises the following steps: assigning an initial value for the density image of a basic material to be reconstructed; carrying out orthographic projection on an estimated image so as to obtain a projection estimated value; estimating the error of the reconstructed image; updating the image by utilizing the estimated error of the reconstructed image, and repeating the steps mentioned above until the reconstructed density image is convergent. The multi-energy-spectrum CT imaging system comprises a scanning module, a reconstruction module, and a statistics module, wherein the reconstruction module comprises an initializing module, a projecting module, a correcting module, and an updating module.

A resist composition with enhanced X-ray and electron sensitivity includes a plurality of chemically inert nanoparticles dispersed throughout a base resist material. The nanoparticles have a higher atomic number than the base resist material and each of the nanoparticles is formed by a nanoparticle core, e.g., of a noble metal, coated with an organic capping layer or shell. The latter renders the core dispersible and chemically compatible with the resist material surrounding the nanoparticle. A method of making a resist composition with enhanced X-ray and electron sensitivity is to provide a resist material and disperse chemically inert nanoparticles throughout the resist. The nanoparticles have a higher atomic number than the resist and a have core / shell structure. A resist composition with enhanced X-ray and electron sensitivity can be made by having a nanoparticle core, with a higher atomic number than the resist, that is coated with an organic capping layer. The nanoparticle with the core / shell structure is then dispersed throughout the resist material.

Methods of controlling emissions from a diesel engine are provided. The method includes contacting the emissions with a perovskite-type catalyst consisting essentially of a metal oxide composition represented by the general formula Aa-xBxMOb, in which A is a mixture originally in the form of single phase mixed lanthanides collected from bastnasite; B is a divalent or monovalent cation; M is at least one element selected from the group consisting of M is at least one element selected from the group consisting of elements of an atomic number of from 22 to 30, 40 to 51, and 73 to 80; a is 1 or 2; b is 3 when a is 1 or b is 4 when a is 2; and x is a number defined by 0<x<0.7. The perovskite-type catalyst may be used to oxidize hydrocarbons and carbon monoxide and to control particulate emissions in the diesel exhaust.

In the representation of X-ray images, an atomic number characteristic for an X-rayed sub-object (2, 3, 4) is determined from X-ray beams having different energies and the absorption values determined in that process, to which specific colors and shades are assigned. The representation of the color intensity is influenced so that, when representing objects (3, 4) having the same X-ray absorption on a monitor (8), the colors appear equally bright to the viewer. To that end, while the pre-set color for the objects (3, 4) is maintained, the brightness of the different colors is adjusted to an equal or approximately equal brightness, taking into account the spectral sensitivity of the human eye.

A technique for appropriately separating three components contained in radiographic images is disclosed. A component image generating unit separates an image component, which represents any one of a soft part component, a bone component and a heavy element component including an element having an atomic number higher than that of the bone component in a subject, from inputted three radiographic images, which represents degrees of transmission of three patterns of radiations having different energy distributions through the subject, by calculating a weighted sum for each combination of corresponding pixels between the three radiographic images using predetermined weighting factors.

Methods of controlling emissions from a diesel engine are provided. The method includes contacting the emissions with a perovskite-type catalyst consisting essentially of a metal oxide composition represented by the general formula Aa−xBxMOb, in which A is a mixture originally in the form of single phase mixed lanthanides collected from bastnasite; B is a divalent or monovalent cation; M is at least one element selected from the group consisting of M is at least one element selected from the group consisting of elements of an atomic number of from 22 to 30, 40 to 51, and 73 to 80; a is 1 or 2; b is 3 when a is 1 or b is 4 when a is 2; and x is a number defined by 0<x<0.7. The perovskite-type catalyst may be used to oxidize hydrocarbons and carbon monoxide and to control particulate emissions in the diesel exhaust.