Search

Selenium-rich foods serve the dual-function of providing nutrients and organic selenium. In the situation of selenium deficiency in the entire population, it is crucial to understand the sources of selenium and its circulation in the natural environment and biological systems. Current research on selenium-rich foods focuses mostly on chemical synthesis and bio-organic conversion, which is highly specialized and not suitable for horizontal comparison of different selenium-rich foods. There are few studies on the circulation of selenium and the selenium contents and health benefits of different selenium-rich foods. This article summarizes the sources, circulation and metabolism of selenium, the sources and forms of natural selenium in selenium-rich foods, and the selenium absorption and metabolism pathways in plants, animals, and microorganisms. Next, it reviews the current status of research on selenium-rich foods from various sources, and gives an outlook on the future of selenium-rich foods. This review may serve as a foundation for in-depth comparison of selenium-rich foods from various sources, and provide scientific guidance for the research and development of novel healthy selenium-rich foods.

In view of the complex equipment fault with presents the characteristics of multiplicity, correlation and fuzziness, this paper analyzes the evolution law of the equipment heatth state, constructs the fault risk scale by using the adaptive fuzzy neural network and failure mode, effects and criticality analysis, and realizes the quantitative description of the fault risk degree of complex equipment state equipment health classification. Experimentally, the model proposed in this paper has signifticant advantages over the traditional fault prediction and quantitative method of fault risk degree, and realizes the dynamic feedback of the whole type cycle equipment from design, production, deployment and use to retirement, which is of great significance for improving the comprehensive support ability of complex equipment. [ABSTRACT FROM AUTHOR]