Comparison of Physical Properties and Microbial Indexes of Five Kinds of Commercial Corncob Beddings

[Objectives]This study was conducted to select suitable mouse beddings from commercial corncob bedding(A-E)produced by five different manufacturers.[Methods]The physical properties and microbial indexes of the five kinds of corncob bedding were studied by means of visual inspection,dust content determination,moisture content determination,water absorption tests and microbial detection.[Results]In visual inspection,corncob bedding A was better than other four kinds.During dust content determination,corncob bedding D was higher than other 4 kinds(1.83%±0.2983%,P<0.05).In terms of moisture content,the moisture contents of the five kinds of corncob bedding were less than or equal to 10%.In the water absorption test,the water absorption capacities of the five kinds of bedding before autoclaving were all greater than 150%,and the water absorption of corncob bedding D after autoclaving was better than other four kinds(171.0±5.3,P<0.05).During microbial detection,the total number of colonies of corncob bedding B before autoclaving was higher than those of other four types(1.42×10^(5)±4.3×10^(4),P<0.05).The five kinds of commercial corncob bedding have different physical parameters and microbial conditions,and each has its own advantages and disadvantages.When purchasing and selecting corncob bedding,it is necessary to comprehensively consider the needs of daily feeding work,and choose bedding according to the effects on the health and welfare of experimental animals.[Conclusions]This study provides a reference for selecting suitable corncob bedding for mouse.

先进制造业与现代服务业融合:研究综述及未来趋势

我国正处在经济由高速增长转向高质量发展、经济结构战略性调整、转换增长动力的攻关期,先进制造业和现代服务业融合发展成为回答制造业“大而不强”、长期在价值链中低端徘徊等发展难题的最优解。本文全面梳理了“两业融合”的相关研究成果,系统回顾了“两业融合”的内涵、维度与测量,构建了“两业融合”作为前因、结果、中介作用的研究框架,分析了现有研究的缺口。本文认为未来应关注“两业融合”理论研究的深化、标准化测量指标体系的构建、中介及调节机制研究的拓展、对融合业态模式的探索。对“两业融合”的现有研究进行梳理,并对未来趋势进行研判,能够为“两业融合”发展提供理论指导和实践支持。