Universal Beer Agar 500g

Description

General description
Universal Beer Agar is a base medium supplemented with beer. Its characteristics are closer to natural environmental conditions found in a typical brewery. Thus, it supports the growth of more lactic acid bacteria and yields larger colonies in a shorter time than other brewer’s media. The addition of beer gives the medium some selectivity to the organisms adapted to existing conditions in the brewery. Hop and alcohol inhibit the growth of many other microorganisms, which are not adapted to the beer matrix.

Application
Universal Beer Agar is suitable for culturing spoilage microorganisms of significance in the brewing industry (bacteria like Lactobacillus, Pediococcus, Acetobacter, and yeasts).
Preparation Note
Suspend 62.16 g in 750 ml of distilled water. Heat to boiling to dissolve the medium completely. Add 250 ml beer, without degassing, to the hot medium and mix gently. Dispense as desired and sterilize by autoclaving at 121°C for 10 minutes. If required, add 1 ug/ml (Cat. No. 01810) of Cycloheximide to sterile medium prior to dispensing.

PROPERTIES
Quality Level
200

sterility
non-sterile

form
powder

shelf life
limited shelf life, expiry date on the label

composition
agar, 12 g/L
dextrose, 16.1 g/L
dipotassium phosphate, 0.31 g/L
ferrous sulfate, 0.006 g/L
magnesiumsulfate, 0.12 g/L
manganese sulfate, 0.006 g/L
monopotassium phosphate, 0.31 g/L
peptonized milk, 15 g/L
sodium chloride, 0.006 g/L
tomato juice, 12.2 g/L
yeast extract, 6.1 g/L

manufacturer/tradename
NutriSelect® Plus

packaging
pkg of -500 g

technique(s)
microbiological culture: suitable

final pH
6.3±0.2 (25 °C)

application(s)
bioburden testing
food and beverages
microbiology