PRESSURE-REGULATING LARGE-AREA WINDOWLESS AIRFLOW PROPORTIONAL COUNTER

    公开(公告)号:US20230036752A1

    公开(公告)日:2023-02-02

    申请号:US17388161

    申请日:2021-07-29

    IPC分类号: G01T1/185

    摘要: A pressure-regulating large-area windowless airflow proportional counter is provided, which includes a chamber, a metal tray, a side cover, a gas cylinder, and a voltage input and signal output terminal. The chamber has a side opening. A large-area source is placed on the metal tray and the metal tray is moved into or out of the chamber via the side opening. The side cover is fixed to the side opening by an O-ring via a locking device to form an airtight structure. The gas cylinder is used to supply a dedicated gas into the chamber. The voltage-input/signal-output terminal is used to supply voltage to an anode wire net. The free electrons generated by the large-area source due to the free phenomenon are collected by the anode wire net, and outputted to a voltage signal processing module through the voltage-input/signal-output terminal for analysis of pulse height or pulse count.

    Method for preparing a non-radioactive standard β-CFT

    公开(公告)号:US11466002B2

    公开(公告)日:2022-10-11

    申请号:US17225269

    申请日:2021-04-08

    IPC分类号: C07D451/02 C07B49/00

    摘要: This invention discloses method for preparing a non-radioactive standard β-CFT. Using cocaine hydrochloride as the starting material, and after a series of hydrolysis, dehydration, esterification and bonding reactions, a non-radioactive standard (2β-Carbomethoxy-3β-(4-fluoropenyl) tropane) is prepared. Furthermore, this preparation method has fewer steps, is easy to operate, and the purity of the product is as high as 97.97%. Therefore, the method for preparing a non-radioactive standard β-CFT can promote the development of positron imaging in the diagnosis of Parkinson's disease.

    Method of Electrode Fabrication for Super-Thin Flow-Battery

    公开(公告)号:US20220085389A1

    公开(公告)日:2022-03-17

    申请号:US17019451

    申请日:2020-09-14

    摘要: A method is provided to fabricate electrode used in super-thin flow-battery. A semi-finished cured film is prepared though colloid-mixing, impregnating, and baking. The film is pressed with different materials for fabricating various types of polar plate according to applications. Thus, a thin electrode is fabricated to contain a supporting member with thickness controllable. The electrode obtains excellent resistance to the permeation of vanadium ions; vertical-penetration volume resistance is controlled by adjusting the blending ratio of carbonaceous matter; and the demand of conductivity is met. Besides, the film is prepared to obtain a bipolar plate, a copper-containing current-collecting end plate, or other electrode material like carbon felt, carbon paper, etc. to be combined into an integrated electrode mold. Consequently, different products are obtained with different materials, where the fabrication is simple without using a high-temperature carbonization device and the component cost of flow battery is effectively reduced.

    High-efficiency desiccant wheel
    36.
    发明授权

    公开(公告)号:US11260345B2

    公开(公告)日:2022-03-01

    申请号:US16709960

    申请日:2019-12-11

    IPC分类号: B01D53/06 B01D53/26 F24F3/14

    摘要: A desiccant wheel is provided to be rotatable. Through the body of the wheel or a surface adsorbent, water vapor in humid air flow is adsorbed. By passing a high-temperature air flow through the wheel, the body or surface coating is regenerated with moisture removed. Along a cross-section radial, the wheel is divided into different areas. The body has three-dimensionally inter-connected pores. The pores can be of different types. The wheel is a complete concentric cylinder or a concentric cylinder comprising equal or unequal sectors. The equal or unequal sectors are separated with each other. The wheel can rotate at a fixed speed for continually repeating a process of adsorbing, transiting, and regenerating. Thereby, drying can be carried out without causing physical or chemical change to heat-sensitive material, which also improves drying efficiency, reduces size, lowers power consumption, and helps in carbon reduction for industry.

    Apparatus of power-generating solid oxide fuel cells tied to grid

    公开(公告)号:US11258263B1

    公开(公告)日:2022-02-22

    申请号:US17190562

    申请日:2021-03-03

    摘要: An apparatus of solid oxide fuel cells (SOFC) is provided. The SOFCs generate power and are grid-tied. The apparatus comprises a power-generating side; and a grid-connecting side using an elementary household power management. The apparatus solves problems like low voltage, high current, voltage oscillation, voltage dips, long generator-starting time, etc. The apparatus is not only used as a stable power supply (base load), but also helps adjust the regional peak electricity demands. The features include the following: 1. A grid is tied, where output power does not pass through a direct-current boost converter and, thus, has no loss from it. 2. Injures, including voltage oscillation and sudden unloading after dumping, are reduced for avoiding further damages to cell sheets. 3. With the coordination of elementary power management and the integration of grid, the limitation of long-awaiting generator-starting time is crossed out and convenience of immediate power use is achieved.

    Method of high-pressure purification of [f-18]FEONM

    公开(公告)号:US11247947B2

    公开(公告)日:2022-02-15

    申请号:US17140246

    申请日:2021-01-04

    摘要: A method is provided to purify [F-18]FEONM under a high pressure. The synthesis processes of [F-18]FEONM are integrated. An isolation process of non-toxic radio-high performance liquid chromatography (radio-HPLC) is used to purify the crude product. The method integrates a convention [F-18]FDG synthesizer and a novel radio-HPLC system together in a heat chamber. After radiofluorinating the precursor, the reaction product is purified with an alumina solid-phase column in advance to obtain the crude product while fluorine-18 is removed. Then, diphenyl semipreparative HPLC column is used for a final purification. A non-toxic solvent is used for mobile-phase eluting to remove the unreacted precursor and the phase-transfer solvent. The radiofluorination has a reaction yield about 50 percent (%). The method has an uncorrected radiochemical yield of 10˜20%. Both of the radio-HPLC and the radio-thin layer chromatography (radio-TLC) have radiochemical purity higher than 95%.