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In order to obtain an industrial strain with a higher L(+)-lactic acid yield, the strain Rhizopus oryzae RF3608 was mutated by means of nitrogen ion beam implantation and the mutant strain RLC41-6 was isolated. Under optimal conditions the yield of L(+)-lactic acid produced in a shake-flask reached 133 g/L - 137 g/L after 36 h cultivation, indicating that the conversion rate based on glucose was as high as 88% - 91% and the productivity was 3.75 g/L.h. It was almost a 115% increase in lactic acid production compared with the original strain RF3608. 相似文献
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周秀红 《化工自动化及仪表》2014,(9):1084-1086
针对工业铂热电阻检定数据处理存在的计算复杂、费时费力、容易出错且效率低下的问题,采用Visual Studio 2008和C#语言编制工业铂热电阻检定数据处理软件,实现了仪表信息存储、自动数据计算、查询及打印证书等功能。 相似文献
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随着国家十二五规划对节能的重视,以及新的标准规范的相应出台,建筑门窗幕墙节能设计势在必行。尤其对于幕墙设计,隔热断桥型材的应用,以及中空玻璃暖边间隔条的应用,大大降低了幕墙型材的传热系数和中空玻璃边缘线传热系数,提高了幕墙保温隔热性能,对建筑物的整体节能起到了显著的效果。 相似文献