<p>OK, so if a postdoc whose job it is to conduct experiments doesn’t want to show up on the necessary schedule to do the experiments (a lot of experiments in biology and chemistry are time sensitive), then he’s just negligent at his job. Experiments don’t follow a Monday to Friday, 9-5 schedule and if he wants to do lab work he surely knows that and has to accept it. I think any self-respecting lab would expect the same.</p>