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Documenti fondamentali

17215

Millipore

WL Differential Agar

suitable for microbiology, NutriSelect® Plus

Sinonimo/i:

WLD Agar, Wallerstein Differential Agar

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About This Item

Codice UNSPSC:
41171606
NACRES:
NA.74

Sterilità

non-sterile

Livello qualitativo

Stato

powder

Durata

limited shelf life, expiry date on the label

Composizione

actidione (cycloheximide), 0.004 g/L
agar, 20 g/L
bromocresol green, 0.022 g/L
calcium chloride, 0.125 g/L
casein enzymic hydrolysate, 5 g/L
dextrose, 50 g/L
ferric chloride, 0.0025 g/L
magnesium sulfate, 0.125 g/L
manganese sulfate, 0.0025 g/L
monopotassium phosphate, 0.55 g/L
potassium chloride, 0.425 g/L
yeast extract, 4 g/L

Produttore/marchio commerciale

NutriSelect® Plus

tecniche

microbiological culture: suitable

pH finale

5.5±0.2 (25 °C)

applicazioni

bioburden testing
food and beverages

microbiology

Compatibilità

selective and differential for Escherichia coli
selective and differential for Lactobacillus spp.
selective and differential for Proteus spp.
selective and differential for bacteria (General Media)
selective and differential for coliforms

Descrizione generale

WL (Wallerstein Laboratory) Differential Agar, modified is formulated as described by Green and Gray for the examination of materials encountered in brewing and for industrial fermentations containing mixed flora of yeasts and bacteria. WL Differential Agar helps in selective isolation and enumeration of bacteria encountered in breweries and industrial fermentations.

Applicazioni

WL Differential Agar has been used for the enumeration of Kluyveromyces marxianus culture.

Nota sulla preparazione

Suspend 80.26 g in 1 litre distilled water. Boil to dissolve the medium completely. Sterilize by autoclaving at 121°C for 15 minutes. If desired, to obtain a pH of 6.5, add 1% solution of sodium bicarbonate.

Nota a piè di pagina

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.

Note legali

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

Codice della classe di stoccaggio

11 - Combustible Solids

Classe di pericolosità dell'acqua (WGK)

WGK 3

Dispositivi di protezione individuale

Eyeshields, Gloves, type N95 (US)


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Certificati d'analisi (COA)

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A differential procedure for bacteriological studies useful in the fermentation industry
Green SR and Gray PP
Archives of Biochemistry and Biophysics, 32(1), 59-69 (1951)
Interactions between Kluyveromyces marxianus and Saccharomyces cerevisiae in tequila must type medium fermentation
Lopez CLF, et al.
World Journal of Microbiology & Biotechnology, 30(8), 2223-2229 (2014)

Articoli

Culture Method for Beer Quality Control

Molecular biology-based methods, like PCR, can be used for lactobacilli detection.

probiotics-and-human

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