A1202HA - YEAST EXTRACT
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DESCRIPTION:

Yeast Extract is considered as a principal enrichment factor in culture media. It accelerates the growth of a wide variety of microorganisms, including yeasts and molds. Because of its carbohydrate content, it is not suitable for media intended for the study of sugar fermentation. 

TYPICAL ANALYSIS

Physical characteristics :

- Aspect, color......................................................................................................................yellow powder

- Solubility in water at 5 % ...................................................................................................................total

- pH of an aqueous 5% solution ................................................................................................. 7,0 ± 0,5

- Stability at pH 7,0 after autoclaving for 15 minutes at 121 °C........................................................stable

Chemical characteristics :

- Total Nitrogen...........................................................................................................................10 - 12 %

- α-amino Nitrogen ...................................................................................................................4,5 - 6,5 %

- Indole..........................................................................................................................................absence

- Nitrites ........................................................................................................................................absence

- Chlorides (expressed as NaCl) ...................................................................................... less than 0,5 %

- Calcium........................................................................................................................................... 0,1 %

- Sulfuric ash...................................................................................................................less than 17,0 %

- Loss on drying ................................................................................................................less than 6,0 %

Total amino acids (expressed in g per 100 g of product) :

- Aspartic acid....................................................................................................................................... 6,5

- Threonine ........................................................................................................................................... 2,6

- Serine ................................................................................................................................................. 2,4

- Glutamic acid.................................................................................................................................... 11,5

- Proline ................................................................................................................................................ 2,3

- Glycine................................................................................................................................................ 3,0

- Alanine................................................................................................................................................ 4,8

- Valine.................................................................................................................................................. 4,1

- Cystine..................................................................................................................................not assayed

- Methionine.......................................................................................................................................... 0,9

- Isoleucine ........................................................................................................................................... 3,1

- Leucine ............................................................................................................................................... 4,2

- Tyrosine.............................................................................................................................................. 1,1

- Phenylalanine..................................................................................................................................... 2,6

- Lysine ................................................................................................................................................. 4,6

- Histidine.............................................................................................................................................. 1,4

- Arginine .............................................................................................................................................. 3,2

- Tryptophan ......................................................................................................................................... 0,9

 

Vitamins (expressed as mg per 100 g of product) :

- Thiamine............................................................................................................................................ 2,1

- Riboflavin.......................................................................................................................................... 12,5

- Pyridoxin............................................................................................................................................ 2,4

- Nicotinic acid .................................................................................................................................... 60,0

- Pantothenic acid.............................................................................................................................. 10,5

- Folic acid ........................................................................................................................................... 0,6

- Choline ........................................................................................................................................... 150,0

- Biotin................................................................................................................................................... 0,4

PACKAGING

Dehydrated medium : 
A1202HA - 500 g bottle
A1202GC - 5 kg drum

ENRICHMENT FACTOR FOR CULTURE MEDIA

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