https://www.selleckchem.com/products/Ubenimex(Bestatin).html To overcome the limited number of equipment available, the foremost solution can be 3D printing that allows three-dimensional renderings to be realized as physical objects with the use of a printer and that revolutionized prototyping. Low-cost desktop 3D printers allow economical 3D models and guides but have less quality approvals. 3D printing is already well integrated into the process of COVID-19 battle by manufacturing the equipment that are convenient. The goals of this review are to explore the techniques of 3D printing for the equipment that are used for COVID-19 battle and evaluate the materials that are used for manufacturing and the manufactured equipment. Lastly, the advantages and disadvantages of 3D printing are figured out. Several studies have shown that afternoon napping promotes cognitive function in the elderly; on the other hand, some studies have shown opposite results. This current study further examined the relationship between afternoon napping and cognitive function in the ageing Chinese population. A total of 2214 elderly were included (napping group n=1534; non-napping group n=680). They all received cognitive evaluations by the Beijing version of the Montreal Cognitive Assessment, the Mini-Mental State Examination, and the Chinese version of the Neuropsychological Test Battery. Among all the subjects, 739 elderly volunteered to take blood lipid tests. Significant differences in cognitive function and blood lipids were observed between the napping and the non-napping groups. Afternoon napping was associated with better cognitive function including orientation, language, and memory in the present study. Subjects with the habit of afternoon napping also showed a higher level of triglyceride than the non-napping subjects. The results demonstrated that afternoon napping was related to better cognitive function in the Chinese ageing population. The results demonstrated that afternoon n