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Fe3O4负载ZnO 催化剂的制备及其催化合成松香甘油酯的研究
以Fe3O4作磁性中心，负载ZnO 制备了一系列磁性催化剂，并通过TEM、XＲD 和XPS 对其结构和组成进行了表征，经过筛选得出Fe3O4@ SiO2-ZnO 催化效果最佳，远优于其他催化剂，且具有较好的稳定性能
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Investigation on Internal Crack Defects in Medium Carbon Steel by Soft Reduction
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Bond strength of Polyalkasite cements with various surface preparations
This study aimed evaluate the effect of different surface treatments on the repair bond strength between existing and new Cention N restorative material. A total of 48 Cention N blocks each measuring
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Data of the research about learning in PET bottle board
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This invention pertains to a layered sheet comprising a flame resistant wet-laid nonwoven carrier having a first and second surface and an inorganic refractory layer adjacent to at least one surface o
国家林业和草原科学数据中心2023-02-12 更新60
