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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.
23-06-2023 дата публикации

Wetland degradation risk assessment method and system

Номер: CN116307688A
Автор: LI YAN, LU CHENGPENG, WAN ZHIQI, WU CHENGCHENG, LIU BO, SHU LONGCANG
Принадлежит:

The invention discloses a wetland degradation risk assessment method and system, and particularly relates to a method for grading the wetland degradation risk by utilizing a risk assessment method coupling an analytic hierarchy process (AHP), an entropy weight method (EWM) and an improved mutation theory (ICT). Comprising the following steps: (1) establishing an evaluation index alternative set: selecting human factors, natural factors and social economic factors which influence wetland degradation in an evaluation area, and selecting characterization factors of the wetland degradation from three aspects of a wetland structure, a wetland state and a wetland function; (2) screening relatively independent unit evaluation indexes by using a variance expansion factor (VIF); (3) ranking the importance of the evaluation indexes according to the comprehensive weight determined by the AHP and the EWM; (4) calculating a risk evaluation value of wetland degradation by using ICT; and (5) comparing ...

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Номер записи: 1
22-04-2015 дата публикации

Method for increasing fucoxanthin content of Phaeodactylum tricornutum by using arachidonic acid

Номер: CN104531601A
Автор: ZHU SHUAIQI, GONG YIFU, LIU HAO, LIU SHIJIE, LU CHENGPENG, LIU ZHAO, WANG HEYU
Принадлежит:

The present invention discloses a method for increasing the fucoxanthin content of Phaeodactylum tricornutum by using arachidonic acid. The method comprises: mixing sterilized seawater and an MAD mother liquor to obtain a nutrition liquid, adding a Phaeodactylum tricornutum mother liquor to the nutrition liquid to culture, culturing for 2 days, adding arachidonic acid, continuously culturing for 6 days, collecting the algae liquid, carrying out centrifugal separation, removing the supernatant, collecting the algae, carrying out a freeze-drying treatment on the algae for 2 days, and grinding for spare. According to the present invention, with the method, the fucoxanthin content in the Phaeodactylum tricornutum can be significantly increased, the operations are simple and convenient, the cost is low, the production cycle is short, and the method is suitable for batch production and industrial production.

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Номер записи: 2