Petri Cup

Petri dish
Petri Dish

Petri Cup - kind glassware, widely used in bacteriological practice for cultivation of bacteria on the solid nutrient media. Petri dish consists of two flat transparent glass cups, one of which with a large diameter, is the cover (Fig). The most often used Petri dish with a diameter of 10 cm, a height of 1.5 see Before using Petri dishes wash thoroughly with tap water with soda or soap and a brush, then rinse with distilled water and sterilise by dry heat. Before sterilization Petri dish put in a metal case or wrapped in paper.
In a sterile Petri dishes spill on 25-30 ml of cooled up to temperature 55 degrees molten nutrient medium for horizontal surfaces. Colonies of bacteria count, browsing the cups on the light. Cm. also Bacteriological examination.

Petri Cup - kind glassware, widely used in bacteriological practice for cultivation of bacteria on the solid nutrient media, screening and selection of isolated colonies, determine sensitivity of the studied bacteria to various antibacterial drugs, including antibiotics. Proposed in 1887. bacteriologist Petri (C. J. Petri) and was repeatedly modified. P. H. represents two small flat glass Cup, one of which with a large diameter, is the cover (Fig). Diameter P. H. 5-10-15-20-22 cm, height of 1,5-2 cm; the most widely used P. h 10 cm in diameter, of a height of 1.5 see For manufacturing P. H. apply transparent, neutral glass, little leaching when sterilization and washing. The bottom P. H. should be smooth and flat.
Calculation and selection of the colonies P. H. produce, browsing Cup on the light, better on the background of a special matte screen. The nutrient medium (see) spill in P. o'clock on a flat, horizontal table or special horizontal table installed in a laboratory Boxing. In P. H. pour 25-30 ml of cooled down to 55 degrees molten solid environment and cover with sterile, several larger diameter circles cut from filter paper; after full hardening environment mugs replace the lids P. H.