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Millipore

GranuCult® plus WL nutrient agar

for yeasts, suitable for microbiology

Synonyme(s) :

Wallerstein Laboratories Nutrient Agar

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About This Item

Code UNSPSC :
41106213
Nomenclature NACRES :
NA.74

Forme

medium granules (dehydrated (DCM))

Niveau de qualité

200

Conditionnement

pkg of 500 g

Fabricant/nom de marque

GranuCult® plus

Conditions de stockage

dry media (Keep Tightly closed)

Technique(s)

microbiological culture: suitable

Couleur

blue-green

pH

5.3-5.7 (25 °C, 77 g/L in H2O, after autoclaving)

Solubilité

77 g/L

Masse volumique apparente

730 kg/m3

Application(s)

food and beverages
microbiology

Température de stockage

15-25°C

Adéquation

yeasts

Catégories apparentées

Description générale

GranuCult® plus WL (Wallerstein Laboratories) Nutrient Agar has a pH of 5.5, which is optimal for the enumeration of brewers′ yeast. If bakers′ or distillers′ yeast is to be examined, the pH should be adjusted to 6.5 (better yields). When cultivating microorganisms from an alcoholic mash, tomato juice should be added to the medium. WL differential agar contains cycloheximide to suppress yeasts and any molds that may be present; this medium allows reliable counting of all bacteria that may be encountered in the tests performed in brewery laboratories.

Application

GranuCult® plus WL nutrient agar is suitable for the enumeration and cultivation of yeasts and bacteria in the microbiological control conducted in the brewing and other fermentation industries.

Caractéristiques et avantages

  • GranuCult® offers superior granulated culture media.
  • Safe and sustainable due to reduced risks associated with fine dust and toxic substance inhalation, resulting in a safer work environment.
  • Excellent wettability, solubility, and free-flowing properties
  • Convenient, with minimal component separation and clumping, even under warm or humid conditions.
  • High batch-to-batch reproducibility
  • Prolonged shelf life of up to five years
  • High number of test strains exceeding all regulatory demands
  • Granulation technology allows many supplements to be included, with no need to add these separately

Remarque sur l'analyse

Appearance (clearness): clear
Appearance (colour): blue-green
pH-value (25 °C): 5.3 - 5.7
Growth (Candida albicans ATCC 10231 (WDCM 00054)): good to very good
Growth (Saccharomyces cerevisiae ATCC 9763 (WDCM 00058)): good to very good
Growth (Lactobacillus acidophilus ATCC 4356 (WDCM 00098)): fair to very good
Growth (Leuconostoc mesenteroides ATCC 9135 (WDCM 00108)): good to very good
Growth (Enterococcus faecalis ATCC 11700): good to very good
Growth (Escherichia coli ATCC 11775 (WDCM 00090)): good to very good
Growth (Proteus mirabilis ATCC 29906 (WDCM 00023)): good to very good
Incubation: 4 days; 28 °C; aerobic.

Note de bas de page

We offer two media types: the superior granulated GranuCult® and the cost-efficient powdered NutriSelect® culture media, depending on your needs.
The designations basic, plus, or prime are added to indicate the quality control level, from basic quality control to standard QC plus to prime for full regulatory compliance.

Informations légales

GRANUCULT is a registered trademark of Merck KGaA, Darmstadt, Germany
NutriSelect is a registered trademark of Merck KGaA, Darmstadt, Germany

Code de la classe de stockage

11 - Combustible Solids

Classe de danger pour l'eau (WGK)

WGK 3

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