53results about How to "Detection sensitivity" patented technology

An apparatus for analyzing, identifying or imaging an target including an integrated dual laser module coupled to a pair of photoconductive switches to produce cw signals in the range of frequencies from 100 GHz to over 2 THz focused on and transmitted through or reflected from the target; and a detector for acquiring spectral information from signals received from the target and using a multi-spectral homodyne process to generate an electrical signal representative of some characteristics of the target with resolution less than 250 MHz. The photoconductive switches are activated by laser beams from the dual laser module. The lasers in the module are tuned to different frequencies and a phase shifter in the path of one beam allows the beams to have an adjustable phase difference.

The invention relates to an ultrasonic transducer device, a probe, an electronic instrument, and an ultrasonic diagnostic device. The ultrasonic transducer device is characterized by comprising a substrate, a vibrating film, a piezoelectric element, an input section and a detection section. The substrate has a plurality of openings. The vibrating film provided in each of the openings to cover a corresponding one of the openings. The piezoelectric element is provided in each of the openings on the vibrating film. The input section is configured and arranged to input a drive signal to a part of piezoelectric elements among the piezoelectric elements. The detection section is configured and arranged to detect vibration of the piezoelectric elements, in which the drive signal is not inputted, among the piezoelectric elements while the drive signal is inputted to the part of the piezoelectric elements among the piezoelectric elements.

A solder-joint detection circuit uses a resistive bridge and a differential detector to detect faults in the solder-joint network both inside and outside the digital electronic package during operation. The resistive bridge is preferably coupled to a high supply voltage used to power the package. Resistors R1 and R2 are connected in series at a first junction between the high and low supply voltages and a resistor R3 is coupled to the high supply voltage and connected in series with the resistance of the solder-network at a second junction. The network is held at a low voltage on the die. The detector compares the sensitivity and detection voltages and outputs a Pass / Fail signal for the solder-joint network.

A photomask blank has a light-shielding film composed of at least two layers on a transparent substrate. The light-shielding film includes a light-shielding layer made of a material mainly containing tantalum nitride and containing less than 62 at % nitrogen. The material is capable of being dry-etched with a chlorine-based gas containing no oxygen. The light-shielding film further includes a front-surface antireflection layer formed on the light-shielding layer and made of a material not capable of being dry-etched with a chlorine-based gas, but capable of being dry-etched with a fluorine-based gas.

The invention discloses a method for preparing a fluorescence biosensor and an application of the fluorescence biosensor. Under the light-emitting effect of copper nano particles with polythymine-carried single-stranded DNAs used as the template, the phenomenon that light induction electron transfer is generated between G-four-linked bodies and the copper nano particles, and thus emitted light of the copper nano particles is quenched is utilized, so that the copper nano particles based on the thymine-carried single-stranded DNAs used as the template and a light induction electron transfer system are prepared for establishing the fluorescence sensor. The principle that targets (HBV genes) and probes are combined to form the system of a compact structure, so that the distance between the G-four-linked bodies and the copper nano particles is zoomed out is adopted, and the sensitivity and specificity of the HBV genes are detected.

The invention provides a fluorescent biosensor, a preparation method and an application of the fluorescent biosensor to detect an organic phosphorus pesticide. The luminous effect of copper nanoparticles which take polythymine-carrying single-chain DNA as a template is used, tyrosinase is used to quench the copper nanoparticles, and the organic phosphorus pesticide is added to inhibit the activityof tyrosinase, thereby preparing the fluorescent biosensor which is constructed based on copper nanoparticles which take polythymine-carrying DNA as a template, tyrosinase and the organic phosphoruspesticide. The fluorescent biosensor can detect the organic phosphorus pesticide with sensitivity and specificity. Compared with a fluorescent biosensor in the prior art, the fluorescent biosensor adopts unmarked DNA, is simple to operate and low in cost, and is free of any chemical mark and modification. Through enzymatic activity inhibition, a sensor capable of detecting an organic phosphorus pesticide can be prepared. The result shows that the sensor can detect the organic phosphorus pesticide with the sensitivity being 0.1 ng / L to 1000 ng / L. The fluorescent biosensor is simple to operate,high in sensitivity and low in detection limit.

A power amplification device includes a BTL amplification circuit including a first amplification circuit and a second amplification circuit, the first amplification circuit including a first output transistor, a first power detection circuit, a second output transistor, and a second power detection circuit, the second amplification circuit including a third output transistor, a third power detection circuit, a fourth output transistor, and a fourth power detection circuit, a first comparator which compares output values of the first and fourth power detection circuits, and a second comparator which compares output values of the second and third power detection circuits.

A split type magnet device configured for a high-sensitivity NMR apparatus and used for solution analysis generates a uniform magnetic field at the center portion of the magnet device of at least 11 T, which is used for determining a sample. The NMR magnet device has left and right solenoid superconducting magnets, which face each other with a predetermined distance being provided therebetween. The left solenoid superconducting magnets and the right solenoid superconducting magnets are substantially coaxial to a central axis, and constituted respectively by a plurality of outermost magnets and a separate plurality of innermost magnets. When a sample energizing current generates a main magnetic NMR detection field in the vicinity of a center portion of the apparatus the current direction in at least one of the plurality of innermost magnets is minus while the current direction in at least one of the plurality of outermost magnets is plus.

An ultrasonic sensor is disclosed. The ultrasonic sensor includes a plurality of sensor elements arranged in an array. Each sensor element includes an ultrasonic sensing element and an acoustic matching member. The ultrasonic sensor further includes a bonding member having a thickness approximately equal to a space interval between adjacent ultrasonic sensing elements. The bonding member adhesively fixes the plurality of sensor elements, and includes a portion contacting each ultrasonic sensing element. An elastic modulus of the portion is smaller than that of each ultrasonic sensing element.

A physical quantity sensor includes a movable flat plate having a plurality of openings passing therethrough that is swingable around an axis of rotation, a support substrate linked to the flat plate via a column to suspend the movable flat plate over the support substrate via a gap, and a protrusion protruding toward the movable element. In a plan view, the openings are excluded from a D / 2-width annular range surrounding the outer circumference of the protrusion, where D is the maximum outer diametrical dimension of the protrusion.

There is provided a photoconductive element capable of increasing an output and detection sensitivity by increasing resistivity as the entire element. The photoconductive element is a photoconductive element capable of generating or detecting an electromagnetic wave when light is emitted thereto. The photoconductive element includes a photoconductive layer having a semiconductor layer whose resistivity changes when light is emitted to thereby generate or detect an electromagnetic wave; and a plurality of electrodes provided in contact with the semiconductor layer. The resistivity of the semiconductor layer changes in a thickness direction of intersecting a surface of the semiconductor layer contacting the electrodes. Assuming that the semiconductor layer includes a first region and a second region which is farther away from the electrodes in the thickness direction than the first region, the resistivity in the first region is greater than the resistivity in the second region.

Mass tagging methods are provided that lead to mass spectrometer detection sensitivities and molecular discriminations that are improved over other methods. In particular the methods are useful for discriminating tagged molecules and fragments of molecules from chemical noise in the mass spectrum. These mass tagging methods are useful for oligomer sequencing, determining the relative abundances of molecules from different samples, and identifying individual molecules or chemical processing steps in combinatorial chemical libraries. The methods provided are useful for the simultaneous analysis of multiple molecules and reaction mixtures by mass spectrometric methods.

An ultrasonic sensor is disclosed. The ultrasonic sensor includes a plurality of sensor elements arranged in an array. Each sensor element includes an ultrasonic sensing element and an acoustic matching member. The ultrasonic sensor further includes a bonding member having a thickness approximately equal to a space interval between adjacent ultrasonic sensing elements. The bonding member adhesively fixes the plurality of sensor elements, and includes a portion contacting each ultrasonic sensing element. An elastic modulus of the portion is smaller than that of each ultrasonic sensing element.

An optical coherent tomographic imaging system includes means for introducing a 180-degree phase inversion in the interference fringes, and generating a two-peak shape point spread function (PSF) in the frequency domain for the interference-based tomographic imaging system. The system further includes means for achieving sharper resolution than the diffraction-limited spectral bandwidth in the tomographic imaging system through subtracting the two-peak shape from the original Gaussian PSF. Means are provided for removing the ghost fringes in the tomographic imaging system, which is introduced by the self-interference between the different layers of the sample arm. The apparatus is configured to realize the real-time super-resolution swept-source optical coherent tomography (OCT) such that the sensitivity of the system is enhanced by suppressing the noise floor in the frequency domain, as well as removing the ghost fringes.

The invention discloses a biological colorimetric sensor, a preparation method and application in glucose detection. The preparation method comprises the following steps: putting a mixture of a glucose solution and a glucose oxidase solution into a buffer solution, performing culture, adding a methylene blue solution, uniformly mixing, and further adding an ssDNA (Single-Stranded DeoxyribonucleicAcid) buffer solution, thereby obtaining a mixed solution, namely the biological colorimetric sensor. Compared with the prior art, the biological colorimetric sensor preparation method disclosed by the invention is low in cost and simple to design, the colors of solutions can be changed with glucose of different concentrations, and the change can be read with naked eyes. Under interaction of methylene blue and single-chain DNA, and by virtue of conformation interconversion of the single-chain DNA with polycytosine, a sensor for detecting glucose can be prepared. Results show that the sensor iscapable of sensitively detecting glucose with the concentration of 5mu M to 0.8mM, and also is simple to operate, high in sensitivity and lo win detection limit.

A display device that achieves both high detection sensitivity of the touch sensor unit and smooth input on the touch sensor unit is provided. A method for driving a display device includes a first period and a second period. The display device includes pixels, a gate driver, and a touch sensor unit. The touch sensor unit detects a touch in the first period and stops detecting a touch in the second period. The gate driver supplies signals to some of the pixels and does not supply signals to the other pixels in the second period.