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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

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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Поддерживает ввод нескольких поисковых фраз (по одной на строку). При поиске обеспечивает поддержку морфологии русского и английского языка
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Применить Всего найдено 2. Отображено 2.
05-05-2023 дата публикации

Method for separating peony seed meal flavone by using organic silicon/PA (polyamide) composite membrane

Номер: CN116063265A
Автор: ZOU PING, XU YING, XU RONG, CHEN WENTAO, ZHANG YINGYANG
Принадлежит:

The invention belongs to the field of preparation of bioactive separation membranes, and particularly relates to a method for separating peony seed meal flavone by using an organic silicon/PA composite membrane. According to the invention, 1, 2-bis (triethoxy silyl) ethane is used as a silicon source precursor, hydrochloric acid is used as a catalyst, and organic silica sol is prepared. A PA support body is coated with organic silicon sol through a spin-coating method to prepare a BTESE/PA composite membrane, a PSMF solution is subjected to nanofiltration membrane separation, the molecular weight cut-off of the composite membrane is about 200 Da, the stable flux is 2-5 kg/(m < 2 >. H), the mass cut-off rate of flavone in cut-off liquid reaches 90% or above, the concentration is increased to 800-1200 mg/L, the separation effect of the BTESE/PA composite membrane on the peony seed meal total flavone solution is good, and the PSMF solution is subjected to nanofiltration membrane separation ...

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Номер записи: 1
18-08-2023 дата публикации

Column chromatography extraction method of flavone in peony seed shells

Номер: CN116606274A
Автор: WEI HAIWANG, ZHANG YINGYANG, DONG YAYUN, ZOU PING
Принадлежит:

The invention belongs to the technical field of bioactive substance extraction, and particularly relates to a column chromatography extraction method of flavone in peony seed shells. The method comprises the following steps: extracting a crude flavone extract from peony seed shells; and then separating and purifying the flavone in the peony seed shells by combining an S-8 macroporous resin-C18 silica gel column. A macroporous resin separation sample contains three flavonoid compounds, so that the adsorption selectivity on antibacterial active substances is high, and the obtained separation component has good antibacterial activity on escherichia coli and staphylococcus aureus; according to the present invention, the Penicifolin monomer is obtained after the secondary separation with the C18 silica gel column, the recovery rate can achieve 98.33 +/-0.64%, which is about 72.91% higher than the recovery rate of the Penicifolin in the crude extraction sample, the separation effect of the Penicifolin ...

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Номер записи: 2