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- 저자 : Mengyuan Sun (검색결과 2 건)
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Chunyue Cui,Mengyuan Sun,Qingzhu Zheng 한국화학공학회 2016 Korean Journal of Chemical Engineering Vol.33 No.5
Magnetic Co1−xNixFe2O4/Carbon nanotube (CNTs) nanocomposite was successfully prepared by hydrothermal method and used for the adsorption of pentachlorophenol. The properties of Co1−xNxFe2O4/CNTs were characterized by scanning and transmission electron microscopy, energy dispersive X-ray spectroscopy, X-ray diffractometry, Brunauer-Emmett-Teller surface area determination, and magnetic measurement. Results showed that the Co1−xNixFe2O4 nanoparticles with amorphous structure are dispersed uniformly on the CNTs, which enhanced the adsorption capacity. The Co1−xNixFe2O4/CNTs as a magnetic material are easy to separate from the aqueous solution in magnetic field. The adsorption capacity and magnetization were improved by controlling the Ni content and calcination temperature. In addition, the Co1−xNixFe2O4/CNTs loaded with pentachlorophenol (PCP) could be regenerated by microwave radiation and the regeneration efficiency reached 110% after six regeneration cycles.
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Viet Ha Vu,Xiyang Li,Mengyuan Wang,Rongmei Liu,Guojian Zhang,Wei Liu,Baixue Xia,Qun Sun 아세아·태평양축산학회 2019 Animal Bioscience Vol.32 No.7
Objective: This study aimed to gain deeper insights into the dynamic changes in spoilage fungi populations during fermentation and the influence of traditional additives on silage quality. Methods: Elephant grass (Pennisetum purpureum) was prepared without any additive (control), and with the addition of 0.5% salt, and 0.5% salt–0.2% sugar mixture. The fungal community was then determined using a classic culturing method and high-throughput sequencing at 0, 5, 15, and 60 days after ensiling. Results: The results showed that the fungal community of elephant grass silage varied significantly between the natural fermentation without any additive and the two additive groups. The diversity and relative abundance of spoilage molds in the control group were much higher than those in the two treatment groups (p<0.05). Three species of yeasts (Candida sp., Pichia sp., Trichosporon sp.) and four spoilage molds (Fusarium sp., Aspergillus sp., Muco sp. and Penicillin sp.) were the predominant fungi in elephant grass during natural fermentation from 0 to 60 days, which were found to be significantly decreased in salt and sugar additive groups (p<0.05). Meanwhile, the diversity and relative abundance of undesirable molds in the 0.5%-salt additive group were the lowest among all groups. Conclusion: Adding salt and sugar, particularly 0.5% salt, is a promising effective approach to reduce the amount of undesirable fungi thus, improving the silage quality of elephant grass in northern Vietnam.
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