3results about How to "Effective quenching" patented technology

The application belongs to the technical field of food safety detection, and particularly relates to a photoelectrochemical aptamer sensor based on a CdS / AuNPs / SnS2 heterojunction and application thereof in detection of zearalenone. The photoelectrochemical aptamer sensor comprises a sensing working electrode and a signal control agent. The sensing working electrode is formed by modifying a CdS / AuNPs / SnS2 heterojunction as a photoactive material on the surface of a conductive glass substrate, and then modifying a capture probe and a signal probe compound in sequence. The signal probe compound is composed of graphene oxide, horseradish peroxidase, gold nanoparticles and a zearalenone aptamer. The signal control agent is a mixed solution of 4-chloro-1-naphthol and hydrogen peroxide. The photoelectrochemical aptamer sensor based on the CdS / AuNPs / SnS2 heterojunction can realize high-sensitivity detection of zearalenone, and has the advantages of stable photocurrent response, high sensitivity, low background signal and strong anti-interference ability.

This invention discloses an explosion-proof electrical control box, comprising: a box body, the box body including an explosion-proof outer shell and a front cover, the explosion-proof outer shell being a hollow shell structure with one open end, the front cover being closable at the opening, and when the front cover is closed at the opening, an explosion-proof joint structure is provided between the explosion-proof outer shell and the front cover, the explosion-proof joint structure being used to form a bent and extended explosion-proof channel to cool explosive gases and block the outward propagation of flames; a modular mounting plate for mounting electrical modules, slidably disposed within the explosion-proof outer shell, capable of being pulled out after the front cover is opened and realizing power-off interlocking in maintenance mode; and a pressure relief structure disposed on the explosion-proof outer shell, used to directionally release pressure and prevent flame propagation when there is overpressure inside the box. This application achieves comprehensive technical effects of safe maintenance, controllable pressure relief, reliable explosion-proof, and stable temperature.

The application relates to the technical field of acrylamide production, in particular to a composite polymerization inhibitor, a preparation method and application thereof. The composite polymerization inhibitor comprises modified chitosan 40-60 parts, a nano-composite 40-60 parts and copper N,N-di-n-butyl dithiocarbamate 1-3 parts; wherein the preparation method of the modified chitosan comprises the following steps: S101, dissolving chitosan in a 1wt% acetic acid solution, stirring at 60 DEG C for 2h, adding dimethylamine sulfonamide chloride, adjusting the pH to 8, reacting for 4h, filtering and freeze-drying to obtain an intermediate product; S102, mixing the intermediate product with a modified solution, reacting under a nitrogen environment for 6h, performing dialysis treatment on the obtained reaction liquid for 48h, and freeze-drying to obtain the modified chitosan. The application provides a composite polymerization inhibitor, a preparation method and application thereof, so as to effectively inhibit the problem of monomer self-polymerization in acrylamide production.