Abstract: The disclosure discloses an ultrasonic-assisted pretreatment method for extraction of multiple steroid hormones in a sediment, including the following steps: (1) lyophilizing the sediment, grinding the sediment, and passing the ground sediment through a 40-60-mesh sieve; (2) placing the sample obtained in step (1) in a container; (3) adding an extractant to the container in step (2), shaking the mixture for 15 s-30 s, centrifuging the mixture to collect an supernatant after ultrasonication, and repeating extraction three times; where the extractants used in the three times of extraction are two of methanol, acetonitrile and acetone; and (4) after mixing the supernatants of the three times of extraction obtained in step (3), concentrating the mixture under a nitrogen flow at 20-30° C., passing the concentrated mixture through a filter, and performing detection. By using the method of the disclosure, the maximum recovery can be up to 100%.

Abstract: Embodiments of the present disclosure relate to lipid-PEGylated solid support and phosphoramidites derivatives, methods for preparing the same, and their uses in the delivery of oligonucleotide drugs to the cellular targets.

Abstract: A multifunctional mixed oxide electrocatalyst material including a metal oxide A with oxygen storage capacity and a metal oxide B with oxygen evolution reaction is prepared by two-steps hydrothermal reactions. The electrocatalyst material is a good free radical scavenger, oxygen evolution reagent and able to alleviate carbon monoxide poisoning on catalyst, when it is applied in a membrane electrode assembly for fuel cells.

Abstract: The disclosure provides a high-frequency-reproducibility laser frequency stabilization method and device based on multi-point acquisition of laser tube temperature. The laser frequency stabilization device includes: a frequency stabilization control circuit. The frequency stabilization control circuit includes a polarizing beam splitter, an optical power conversion circuit, an A/D conversion circuit, a temperature measuring circuit, a microprocessor, a D/A converter and a heating film driver. The polarizing beam splitter is disposed outside any one of laser transmitting holes. The optical power conversion circuit is disposed on reflection and refraction optical paths of the polarizing beam splitter. The optical power conversion circuit, the A/D conversion circuit, the microprocessor, the D/A converter, the heating film driver and a plurality of groups of heating films are sequentially in one-way connection.

Abstract: A radiation emission device is provided. The radiation emission device may include an anode, a first cathode, a heating device and an enclosure. The first cathode may include a first filament that emit an electron beam striking the anode to generate radioactive rays for imaging. The heating device may be located outside of the first cathode and be configured to warm up the anode. The enclosure may be configured to enclosure the first cathode and the anode.

Abstract: The present invention relates to a method for analyzing a metalloprotein in a biological sample capable of continuously maintaining conditions of LC-ICPMS constant to measure a metalloprotein with high data reliability. The method for analyzing a metalloprotein which is a complex in a biological sample, the metalloprotein being a complex in which a biomolecule and a metal element bind to each other, includes: treating a biological sample which has been subjected to a pretreatment by liquid chromatography to separate the metalloprotein, and analyzing the separated metalloprotein by inductively coupled plasma mass spectrometry, wherein an ammonium acetate solution is used as a mobile phase.

Abstract: The disclosure provides a high-frequency-reproducibility laser frequency stabilization method and device based on multi-point acquisition of laser tube temperature. The laser frequency stabilization device includes: a frequency stabilization control circuit. The frequency stabilization control circuit includes a polarizing beam splitter, an optical power conversion circuit, an A/D conversion circuit, a temperature measuring circuit, a microprocessor, a D/A converter and a heating film driver. The polarizing beam splitter is disposed outside any one of laser transmitting holes. The optical power conversion circuit is disposed on reflection and refraction optical paths of the polarizing beam splitter. The optical power conversion circuit, the A/D conversion circuit, the microprocessor, the D/A converter, the heating film driver and a plurality of groups of heating films are sequentially in one-way connection.

Abstract: The present disclosure relates to a detection method for congeners of short-chain chlorinated paraffins as well as a device for realizing the detection method. The detection method includes the following steps: adding an internal standard substance to a test sample; subjecting the test sample to a separation process using a comprehensive two-dimensional gas chromatograph formed by connecting a non-polar or weak-polar column and a medium-polar column in series via a modulator; and detecting the sample by a mass analyzer employing a negative chemical ion source after the separation process. The method according to the present disclosure enables accurate qualitative analysis as well as accurate quantitative measurement for short-chain chlorinated paraffins. The detection is extremely accurate yet can be easily carried out with simple operations.

Abstract: A system and method for generating X-rays are disclosed. The method may include emitting an electron beam from a cathode to a focal track of a rotating target. The method may further include deflecting the electron beam onto a first region of the focal track at a first time, and deflecting the electron beam onto a second region of the focal track at a second time. The first region of the focal track may be separated from the second region of the focal track. The method may further include generating X-rays in response to the electron beam deflected onto the first region of the focal track or onto the second region of the focal track.

Abstract: A system and method for generating X-rays are disclosed. The method may include emitting an electron beam from a cathode to a focal track of a rotating target. The method may further include deflecting the electron beam onto a first region of the focal track at a first time, and deflecting the electron beam onto a second region of the focal track at a second time. The first region of the focal track may be separated from the second region of the focal track. The method may further include generating X-rays in response to the electron beam deflected onto the first region of the focal track or onto the second region of the focal track.

Abstract: A system and method for generating X-rays are disclosed. The method may include emitting an electron beam from a cathode to a focal track of a rotating target. The method may further include deflecting the electron beam onto a first region of the focal track at a first time, and deflecting the electron beam onto a second region of the focal track at a second time. The first region of the focal track may be separated from the second region of the focal track. The method may further include generating X-rays in response to the electron beam deflected onto the first region of the focal track or onto the second region of the focal track.

Abstract: A radiation emission device is provided. The radiation emission device may include an anode, a first cathode, a heating device and an enclosure. The first cathode may include a first filament that emit an electron beam striking the anode to generate radioactive rays for imaging. The heating device may be located outside of the first cathode and be configured to warm up the anode. The enclosure may be configured to enclosure the first cathode and the anode.

Abstract: The present disclosure provides a pixel structure including a plurality of pixel cells arranged into a plurality of rows. Each row includes a plurality of pixel-cell groups, each including a predetermined number of subpixels with different colors arranged along the row direction. The pixel-cell groups are arranged in a zigzag manner along a column direction. For any two neighboring rows, each subpixel in one row is divided into two secondary subpixels along the row direction, and each subpixel in the other row is divided into two secondary subpixels along the column direction. The colors of the subpixels in each pixel-cell group of the odd-numbered rows include a first color, a second color, and a third color, respectively along the row direction. The colors of the subpixels in each pixel-cell group of the even-numbered rows are the second color, the third color, and the first color, respectively along the row direction.

Abstract: A system and method for generating X-rays are disclosed. The method may include emitting an electron beam from a cathode to a focal track of a rotating target. The method may further include deflecting the electron beam onto a first region of the focal track at a first time, and deflecting the electron beam onto a second region of the focal track at a second time. The first region of the focal track may be separated from the second region of the focal track. The method may further include generating X-rays in response to the electron beam deflected onto the first region of the focal track or onto the second region of the focal track.

Abstract: Some embodiments are associated with an X-ray source configured to generate X-rays directed toward an object, wherein the X-ray source is to: (i) generate a first energy X-ray pulse, (ii) switch to generate a second energy X-ray pulse, and (iii) switch back to generate another first energy X-ray pulse. A detector may be associated with multiple image pixels, and the detector includes, for each pixel: an X-ray sensitive element to receive X-rays; a first storage element and associated switch to capture information associated with the first energy X-ray pulses; and a second storage element and associated switch to capture information associated with the second energy X-ray pulse. A controller may synchronize the X-ray source and detector.

Abstract: The present disclosure provides a pixel structure including a plurality of pixel cells arranged into a plurality of rows. Each row includes a plurality of pixel-cell groups, each including a predetermined number of subpixels with different colors arranged along the row direction. The pixel-cell groups are arranged in a zigzag manner along a column direction. For any two neighboring rows, each subpixel in one row is divided into two secondary subpixels along the row direction, and each subpixel in the other row is divided into two secondary subpixels along the column direction. The colors of the subpixels in each pixel-cell group of the odd-numbered rows include a first color, a second color, and a third color, respectively along the row direction. The colors of the subpixels in each pixel-cell group of the even-numbered rows are the second color, the third color, and the first color, respectively along the row direction.

Abstract: A start-up control device includes a processor that executes a procedure. The procedure includes: acquiring data relating to communication processing when communication connection of plural data processing devices is initiated; and based on the acquired data relating to communication processing, controlling start-up of the plural data processing devices such that a data processing device that transmitted a response to a request for the connection is started-up earlier than a data processing device that transmitted the request.

Abstract: An emitter device having an emission surface includes a plurality of ligaments configured to emit electrons in response to an applied electric field resulting from an applied electrical voltage. Further, the emitter device includes a plurality of slots configured to provide physical separation between two or more adjacently disposed ligaments of the plurality of ligaments, where one or more slots of the plurality of slots define an electrical path. Moreover, the emitter device includes a low work function layer disposed on at least a portion of a ligament of the plurality of ligaments.

Abstract: In accordance with one aspect of the present system, an X-ray detector of an X-ray imaging system includes a communication module configured to receive a pre-shot image from a detection circuitry and receive one or more pre-shot parameters from a source controller of the X-ray imaging system. The X-ray detector further includes an analysis module configured to determine one or more image characteristics of the pre-shot image. The X-ray detector further includes a determination module configured to calculate one or more main-shot parameters based on the one or more pre-shot parameters and the one or more image characteristics. The determination module is further configured to send the one or more main-shot parameters to the source controller of the X-ray imaging system.

Abstract: In accordance with one aspect of the present system, a dual energy X-ray imaging system includes a communication module configured to receive a pre-shot image from a detection circuitry and receive one or more pre-shot parameters from a source controller of the dual energy X-ray imaging system. The dual energy X-ray imaging system further includes an analysis module configured to determine one or more image characteristics of the pre-shot image. The dual energy X-ray imaging system further includes a determination module configured to calculate a first and a second set of main-shot parameters based on the one or more pre-shot parameters and the one or more image characteristics of the pre-shot image. The determination module is further configured to send the one or more main-shot parameters to the source controller of the dual energy X-ray imaging system.