Petri dishes are usually cylindrical, mostly with diameters ranging from 30 to 200 mm, and a height to diameter ratio ranging from 1:10 to 1:4. Squarish versions are also available.
Similarly, how are petri dishes measured?
Use the formula: [Number of colonies counted] × 10 × [how many times the sample must be multiplied to get to the original concentration: for example, 105] = Number of colony forming units (CFU) per milliliter of starting culture. This is the bacterial growth in your petri dishes.
Accordingly, how do you calculate the area of a dish?
How to calculate the area of a parabolic dish
- r=√ya (2)
- d=√ha.
- a=hd2.
- y=hd2x2 (3)
- r=√d2yh (4)
How do you measure the diameter of a petri dish?
How many mL fit in a petri dish?
As a general guideline to the total volume of medium required, allow for approximately 20 mL per 15 χ 100 mm (standard) Petri dish, or approximately 8 mL per 15 × 60 mm Petri dish. One liter of medium will fill 50 standard Petri dishes or 125 of the smaller dishes.
What is the area of a petri dish?
What is the diameter of an agar plate?
General description. Note: The actual nominal dimensions of these plates possess an inner diameter of 88mm and an outer diameter with lid of 92.4mm.
What is the size of petri dish plate in CM?
Disposable Petri Dish, Size: 9 Cm
| Size | 9 cm |
|---|---|
| Features | Disposable |
| Material | Polypropylene |
| Shape | Round |
| Packaging Type | Box |
What is the surface area of a 10cm dish?
In the case of a “10 cm” petri dish, the actual diameter of the culture surface is 86 mm. Now, 3,14 * 43^2 = 58,08 cm^2, which is more or less what different manufactures provide as the surface area for their “10 cm” dishes.
What is the surface area of a 6 well plate?
Useful information for various sizes of cell culture dishes and flasks
| Catalog No. | Surface area (cm2) | |
|---|---|---|
| Dishes | ||
| 6-well | 140675 | 9.6 |
| 12-well | 150628 | 3.5 |
| 24-well | 142475 | 1.9 |
What was the diameter of the dish?
Modern dishes intended for home television use are generally 43 cm (18 in) to 80 cm (31 in) in diameter, and are fixed in one position, for Ku-band reception from one orbital position.
Who invented petri dish?
Julius Richard Petri
Why is it called petri dish?
The Petri dish is named after German bacteriologist Julius Richard Petri. … Building on methods such as the bell jar on a glass plate technique, Petri invented a culture dish very similar to the one we are familiar with today.