担忧的

Why is UV absorption at 280 nm a good way to monitor for the presence of protein in the eluted fractions?

为什么280nm紫外吸收是检测洗脱组分中蛋白质的存在的好方法？

For this reason, strengthen the disinfection of air is really necessary to prevent secondary pollution in hospital.

因此，加强医院空气消毒，减少与控制因空气污染造成的医院感染是非常必要的。