Petri Dishes

Petri Dishes are shallow transparent, lidded dishes that are used in microbiology environments to hold growth mediums in which the cells can be cultured. The dishes are named after their inventor, German bacteriologist Julius Richard Petri. It is the most common type of culture testing plate, as well as a very popular item within biotechnology. They are typically made of borosilicate glass or clear plastic (such as polystyrene or polycarbonate), they are shallow cylindrical containers with lids designed specifically for laboratory use in microbiology or cell culture applications. They come in a variety of sizes and can be disposable or reusable. Reusable petri dishes are capable of withstanding repeated wet or dry sterilization procedures.

petri dishes are excellent for automated plate filling systems since they can be stacked easily and have a high shape retention. They also come with or without ventilation cams, diameter measurements, and color or clear codings. petri dishes are flat, shallow dishes made of glass or plastic with lids. They are used to develop the culture of cells, ranging from bacteria to molds. They often contain a nutritional medium in which the given cells can grow. They are made of either glass or plastic. The glass dishes are heat resistant and can be sterilized by using autoclave for repeated use. Meanwhile, plastic dishes are often single-use and non-reusable. These dishes come in all shapes and sizes.

petri dishes are shallow cylindrical, round glasses that are used in laboratories to culture different microorganisms and cells. They are essentially used to support the growth of microorganisms. They have become one of the most important equipment in laboratory testing. They are mostly used as laboratory technology in the fields of biology and chemistry. The dish is used by providing a space for culture cells to grow in and be storaged, preventing contamination. The dish is transparent in order to make it easy to observe the growth of microorganisms early on in the process. The small size of petri dishes allows them to be kept under direct microscope observation without the need of transferring the sample into a microscopic plate.

When using petri dishes, it is important to make sure that the item is clean and free of particles that may interrupt or disturb the experiment results. A good way to guarantee this sterile nature is to clean the dishes with bleach before using it. Meanwhile, when starting the experiment, the dish must be filled with an agar medium in order to have the bacteria grow. Agars contain nutrients that allow the growth of bacteria. Plates are usually kept in refrigerators and then removed to room temperature in order to carry the experiment.

petri dishes are mostly cylindrical in shape, with diameters ranging from 30 to 200mm. They also tend to be reusable and made of glass, made with heat-resistant properties that tolerate up to 120-160°C. From the 1960s onward, plastic petri dishes also started to become more common. The dishes are covered with a transparent lid with loose fitting. Some of the glass or plastic version may have holes around the rim to allow air flow over the sample stored and also in order to prevent water condensation. Some of these petri dishes also have rings and slots in their lids and bases to avoid sliding off one another when stuck, or being stuck to a smooth surface. The smaller dishes have protruding bases that can be adapted to microscope usage in order to examine samples directly. Some of these versions have printed grids that are meant to help with measuring the sample’s density.

petri dishes are used in microbiology to cultivate microorganisms such as bacteria, yeasts, and molds. The organisms that have better growth on this media are those that proliferate on solid or semisolid surfaces. The culture media tends to be an agar plate, with a layer of agar that contains nutrients and other ingredients. These components are then dissolved in warm water and poured into the dish to cool down. The samples are then inoculated once the medium solidifies. After that, the dishes are left to rest for hours and days while the organism grows in an incubator. It is a common practice to place these tests up-side down or to cover them in order to avoid airborne contamination. petri dishes are widely used in microbiology, but smaller dishes tend to be more common in larger studies in which petri dishes would be relatively more expensive and labor-intensive to use.

petri dishes are used to detect and map the location of contamination on surfaces, such as kitchen countertops, food preparation equipment, human skin, animal fur etc. These items can be filled so that the culture media protrudes above the edges a bit, thus making it easier to take samples from hard objects and surfaces. They can also be used to cultivate isolated cells from eukaryotic organisms, such as those found on solid agar or in liquid mediums. In terms of botany and agriculture, petri dishes are used to observe the early stages of plant germination, and also to grow plants from isolated cells. When it comes to entomology, petri dishes are used as enclosures to study insect behavior, as well as the behavior of other small animals. Also in the chemistry world, petri dishes are used as containers to evaporate solvents and dry out precipitates because they have large open surfaces. Finally, they are also used to store and display samples, especially when it comes to liquids, granular or powdered samples, and small objects such as insects or seeds.

TAAG Life Sciences offers 90mm petri dishes with vents that are made of virgin polypropylene, using a production and packaging method that avoids exposure to human contact and microorganisms. They are sterilized by gamma rays and with high optical transparency, and are also suitable for automated equipment, bacteriology and routine procedures. The measures are 90x15, and each unit comes with 500 pieces.