性XXXXX搡XXXXX搡景甜,欧美成人精品区综合A片,久久夜色精品国产亚洲噜噜,精品国产精品人妻久久无码五月天

Petri dish is a lab ware for microorganisms or cell culture, by a plane of the bottom of the disc and a cover, usually made of glass or plastic, commonly used in plant materials, microbial cultivation, animal cells adherent and vaccination, marking, separation of bacteria in the laboratory and operation, etc.

As a cell culture vessel, petri dishes are widely used in biological fields such as bacteria and cell culture.The main structure of a typical dish consists of a dish body and a plate lid, which is formed by a single bottom wall and a side wall.Existing culture dishes are generally available for different culture objects.General design, often at the expense of individual needs at the expense of, when this kind of general dish is applied to some special training objects, cannot fully meet the demand for personalized, shows a general lack of petri dishes.

At present, used in petri dishes all existence of bacteria culture and installed at the bottom of the precarious situation, easy to make the cover of loose, for example, when take put only take cover, can make the bottom of the drop, cultures, affect the normal use.On the other hand, the existing petri dish also has the disadvantage of air permeability.

The culture dishes are basically divided into two categories, mainly plastic and glass, which can be used for plant materials, microbial culture and the wall culture of animal cells.Plastic may be polyethylene material, which has a one-time and multiple use, suitable for laboratory inoculation, marking and separation of bacteria, which can be used for the cultivation of plant materials.