PLC控制系统在CCPP中的应用

本文主要介绍了重钢集团股份有限公司的CCPP（燃气-蒸汽联合循环发电机组）特点和PLC控制系统在这个项目中应用。PLC控制系统完成了CCPP工程中的燃气轮机、煤压机、余热锅炉、汽轮机等主体系统的主要功能和控制逻辑,在整个项目中起到了举足轻重的作用。     

Accumulation of Lathenum with Various Species in Oryzias Latipes Body

The accumulation and absorption kinetics of La by fish ( Oozias latipes) from both water and food were tested in fresh water. The effects of La concentration in water and food and the existence of fulvic acid on the absorption were investigated. It was demonstrated that the amount of La accumulated in fish increases with the increase in La concentration in water and food and exposure duration, which the normal physiological activity of fish was inhibited. With fulvic in the system, the absorption rate decreases significantly indicating that the fulvie combined La is not available to the fish uptake.     

应用层析技术提高低pH静脉注射丙种球蛋白制剂质量

目的　进一步提高低ｐＨ静脉注射两种球蛋白制剂质量。方法采用一步ＤＥＡＥ－Ｓｅｐｈａｒｏｓｅ　ＦＦ柱 层析吸附。结果ＩｇＡ残留量由吸附前的５．６０±３．ｍｇ／ｇ蛋白下降到１．１６±０．３８ｍｇ／ｇ蛋白,清除率达（７５．３２± １９．１９）％,总蛋白回收达（８８．５５±２．７６）％,ＩｇＧ纯度进一步提高。制剂中的ＡＣＡ、ＰＫＡ、白喉抗体、单体加二聚体比例等指标均符合规程要求。结论 ＤＥＡＥ－Ｓｅｐｈａｒｏｓｅ柱层析吸附可提高ＩＶＩｇ质量。     

射线底片局部黑度过大的处理方法

在电厂的检修中,由于透照厚度差较大,使底片的局部区域出现黑度过大而无法进行评定的情况,作者以多年的暗室工作经验结合理论知识得出一种减小这种局部黑度过大的方法。