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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 3. Отображено 3.
27-06-2023 дата публикации

Fully deacetylated chitosan oligosaccharide as well as preparation method and application thereof

Номер: CN116333011A
Автор: YANG WENJING, XIA YING, YOU QINGHUI, CAI XIANFENG, SEO HYUN-JOO, WANG MANYING
Принадлежит:

The invention belongs to the field of biological medicine, and discloses fully deacetylated chitosan oligosaccharide as well as a preparation method and application thereof. The preparation method comprises the following steps: firstly, mixing a chitosan oligosaccharide solution with the concentration of 0.1-0.2% and hydrogen type strong acid ion exchange resin according to the volume ratio of 1: (0.5-1), and stirring and adsorbing for 5-10 hours; then adding a diluted hydrochloric acid solution, and heating for 5-10 hours under the condition of 60-80 DEG C; and then adding ammonia water, stirring and desorbing for 2-5 hours, and finally freeze-drying the obtained desorption solution to obtain the fully deacetylated chitosan oligosaccharide. The preparation method is simple to operate, the used raw materials are low in cost, high-concentration inorganic acid does not need to be used as a catalyst, the experimental risk and the equipment loss are reduced, and the preparation method is safe ...

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Номер записи: 1
14-04-2023 дата публикации

Forming method of gas escape groove and fluid dynamic pressure bearing

Номер: CN115962219A
Автор: CHEN YOUYUE, YOU QINGHUI
Принадлежит:

The invention relates to a fluid dynamic pressure bearing and a forming method of a gas escape groove. The fluid dynamic pressure bearing comprises a bearing body and a gas escape groove, the rotating shaft hole is formed in the bearing body, and the rotating shaft hole penetrates through the two ends of the bearing body; the oil guide groove group is arranged on the inner wall of the rotating shaft hole, the oil guide groove group comprises a plurality of oil guide grooves, and the oil guide grooves are V-shaped; the gas escape groove is formed in the outer wall of the bearing body in a concave mode and extends to the two ends of the bearing body, a groove bottom face is formed on one side of the gas escape groove, groove side walls are formed on the two sides of the gas escape groove respectively, the two groove side walls are connected to the two sides of the groove bottom face respectively, and each groove side wall comprises an arc face. The groove side wall has at least one curvature ...

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Номер записи: 2
25-04-2023 дата публикации

Beta-cyclodextrin coated chitosan oligosaccharide and preparation method thereof

Номер: CN116003883A
Автор: YANG WENJING, ZHONG JIE, YOU QINGHUI, CAI XIANFENG, SEO HYUN-JOO, WANG MANYING
Принадлежит:

The invention belongs to the field of beta-cyclodextrin inclusion compound preparation, and discloses beta-cyclodextrin coated chitosan oligosaccharide and a preparation method thereof. The preparation method comprises the following steps: firstly, adding beta-cyclodextrin into a chitosan hydrochloride solution with the mass percent concentration of 2.0%-5.0%, so that the mass percent concentration ratio of the chitosan hydrochloride solution to the beta-cyclodextrin in the mixed solution is 1: 1; and then adding chitosanase to obtain the beta-cyclodextrin coated chitosan oligosaccharide. The preparation method is simple to operate and low in risk, the used medicines are non-toxic and harmless, the browning of the chitosan oligosaccharide can be effectively inhibited, the harm of Mn < 2 + > to a human body in the prior art is avoided, and the preparation method is suitable for being applied to industrial production on a large scale. And the beta-cyclodextrin coated chitosan oligosaccharide ...

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Номер записи: 3