Why the offset Petri Dishes upside down when the train
Cultured in petri Petri Disheses will produce more water vapor, water vapor will condense in the pan covered with water droplets, if the Petri Dishes is set, drop drop colonies will break up, so a large colony may be dispersed into many small colonies, culture and counting of bacteria have caused a lot of trouble. If the result, then, in the media, Petri Dishes cover in the next, no dripping water drops dripping on the colonies.
The difference between medium and Petri Disposable Petri Dishes
Medium for microbial growth and reproduction is a nutritional matrix of a class of things, the name of the apparatus, Petri Dishes, media, including solid medium (Petri Petri Disheses used in) liquid medium (with a conical bottle)
How to save in a sterile Petri Petri Dishes after?
If it is packed with a sterile plastic bags or newspapers of general use disinfectant cleaner directly on the cupboard, drawer (do not unpacked), demanding it be placed in sterile console. Do not place too long.
Han afraid to do tissue culture infection experiments suggest, then sterilized before use.
How to avoid the emergence of deep-fried Petri Dishes pattern
Analysis bombing pattern: the temperature difference is too large, the glass cracks caused by thermal expansion and contraction.
Solution: sterile petri Petri Disheses and placed in high-pressure steam sterilization pot into the oven will not bake out, directly in the pot with the outside temperature dropped quite. I am usually off Petri Dishes, and then has been on the pot. Chance to eliminate the afternoon when the medium. This is also the pot dried kraft paper, thus saving the trouble of drying condensation of water droplets. And the Plastic Petri Dishes did not find any crack phenomenon.
The article comes from Pipette.