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Небесная энциклопедия

Космические корабли и станции, автоматические КА и методы их проектирования, бортовые комплексы управления, системы и средства жизнеобеспечения, особенности технологии производства ракетно-космических систем

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Мониторинг СМИ и социальных сетей. Сканирование интернета, новостных сайтов, специализированных контентных площадок на базе мессенджеров. Гибкие настройки фильтров и первоначальных источников.

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Применить Всего найдено 2. Отображено 2.
14-07-2023 дата публикации

Method for rapidly detecting sulfanilamide veterinary drug residues in aquatic products based on microenvironment response type up-conversion fluorescence biosensor

Номер: CN116429739A
Автор: TAN CHUAN SENG, WU WENWEN, OUYANG QIN, WU JIZHONG, DING XIAODAN
Принадлежит:

The invention belongs to the technical field of veterinary drug residue detection, and relates to a method for rapidly detecting sulfonamide veterinary drug residues in aquatic products based on a microenvironment response type up-conversion fluorescence biosensor. The method comprises the following steps: synthesizing an up-conversion nano material, and gradually modifying carboxyl and amino on the surface of the up-conversion nano material; a sulfadiazine aptamer and a pH sensitive dye fluorescein isothiocyanate are respectively coupled to carboxyl and amino groups around an up-conversion nano material to prepare functionalized up-conversion nano particles, and a fluorescence resonance energy transfer system is constructed; the method comprises the following steps: connecting a sulfadiazine aptamer complementary chain with acetylcholin esterase to prepare functionalized acetylcholin esterase, assembling the functionalized acetylcholin esterase with functionalized upconversion nanoparticles ...

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Номер записи: 1
12-05-2023 дата публикации

Quantitative detection method for ampicillin in milk based on up-conversion fluorescence internal filtration

Номер: CN116106276A
Автор: WANG MINGJIE, TAN CHUAN SENG, DING XIAODAN, LI HUANHUAN, ZHU AFANG, WU JIZHONG
Принадлежит:

The invention belongs to the technical field of detection of antibiotic residues in agricultural and sideline products, and particularly relates to a quantitative detection method of ampicillin in milk based on up-conversion fluorescence internal filtration. Based on fluorescence internal filtration, a solid-phase capture probe and artificial nano-enzyme are introduced, and the method for quantitatively detecting ampicillin in milk based on up-conversion fluorescence internal filtration is constructed. When the ampicillin exists in the system, the solid-phase capture probe captures the ampicillin, the aptamer functionalized platinum nano-particles are specifically adsorbed to the surface of the solid-phase capture probe to catalyze TMB oxidation, and a product and up-conversion generate a fluorescence inner filter effect and fluorescence quenching; along with the increase of the concentration of the ampicillin, the more the platinum nanoparticles loaded on the surface of the solid-phase ...

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Номер записи: 2