Basic methods and precautions for medium preparation

1. Preparation record of culture medium Each time the medium is prepared, there should be a record, including the name of the medium, the formula and its source, and the brand of various ingredients, the final pH value, the temperature and time of sterilization, the date of preparation, and the p

New analysis of Epson high-end engineering projector

According to relevant data, in recent years, the sales ratio of engineering projectors in the field of projectors has obviously increased. With the increase of domestic exhibitions, the large screen effect of projection splicing and display is more and more applied. Engineering projectors There ar