یست اکستراکت آگار 500 گرمی میکرومدیا مجارستان


Description of MM0059

 

                                   Yeast Extract Agar

 

Use and description:  

This medium is used for the plate count of heterotrophic microorganisms in water and dairy products.

 

Composition per liter:

Peptone……………………………………5.0 g

Yeast extract………………………………3.0 g

Agar……………………………………...14.0 g

 

Final pH of the ready to use medium:   7.2 ± 0.2

 

Medium preparation:  

Add 22 grams of dehydrated culture medium to 1 liter of distilled water. Heat gently and bring to boiling to dissolve completely. Mix well and dispense into containers. Sterilise for 15 min at 121oC.

 

Quality specification:

Dehydrated medium: homogeneous, beige fine powder.

Ready to use medium: clear gel, pale straw-coloured

 

Microbiological response:

 

Organism

pH 6.2

pH 4.0

Escherichia coli ATCC 25922

Good growth

Good growth

Lactobacillus fermentum ATCC 9338

Good growth

Good growth

Saccharomyces cerevisiae ATCC 9763

Good growth

Good growth

Candida albicans ATCC 10231

Good growth

Partial to complete inhibition

Aspergillus niger ATCC 16404

Good growth

Partial to complete inhibition

 

Storage:  

Dehydrated medium should be stored between 10 to 25oC. Once opened, place the container in a dark, dry place. The dehydrated medium should not be used if there is any lump or the color has changed from the original.

 


فروشنده: آزمیران
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