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Petri dishes are shallow, flat, cylindrical containers made of glass or plastic, used primarily in laboratories for culturing microorganisms. They provide a sterile environment for the growth of bacteria, fungi, and other cells, allowing researchers to observe their development and behavior. The transparent nature of the dishes enables easy monitoring of cultures without the need to open the container, thus minimizing contamination risks.
| Material | Glass or polystyrene |
| Diameter | Typically 90 mm to 150 mm |
| Height | Usually 20 mm to 25 mm |
| Sterility | Sterile or non-sterile options available |
| Usage | Single-use or reusable |
| Lid type | Flat or vented lids |
When selecting petri dishes, consider the material based on your application; glass dishes are reusable and suitable for high-temperature applications, while plastic dishes are typically single-use and more cost-effective. Specify the desired diameter and height to ensure compatibility with your equipment. Additionally, determine if you need sterile dishes for sensitive cultures, and inquire about any certifications required for your specific use case.
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They can be made from glass or plastic, commonly polystyrene.
Glass petri dishes can be reused after proper sterilization, while plastic ones are typically single-use.
They are commonly available in diameters ranging from 90 mm to 150 mm.
Choose pre-sterilized petri dishes or sterilize glass dishes using an autoclave.
Yes, they are widely used in food safety testing to culture microorganisms.
Flat lids provide a seal, while vented lids allow for gas exchange, which can be important for certain cultures.