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Merck
CN

MHA000P2D

Wallerstein Differential Broth

ampoule capacity 2 mL, filling volume 2 mL, pack of 50 ampules, for bacteria

别名:

WL Differential broth, WLD

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UNSPSC Code:
41106225
NACRES:
NA.74
eCl@ss:
32160801
Feature:
ready-to-use
Ph:
5.5±0.2 (25.0 °C)

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description

ampoule used in breweries to detect and enumerate bacteria present in small numbers in a mixed flora sample. Cycloheximide inhibits most yeasts and molds.

sterility

sterile

form

liquid

shelf life

12 mo.

feature

ready-to-use

packaging

pack of 50 ampules

ampoule capacity

2 mL

filling volume

2 mL

color

slightly opalescent green-blue

pH

5.5±0.2 (25.0 °C)

Quality Level

100

application(s)

environmental
food and beverages
industrial qc (microbial monitoring)
microbiology

compatibility

for use with MF-method, for use with Microfil®, for use with MicropreSure®, for use with Milliflex®

shipped in

wet ice

storage temp.

2-8°C

suitability

bacteria

input

sample type sport drink
sample type bottled water
sample type cosmetics
sample type beer
sample type soft drink
sample type cider
sample type food(s)
sample type wine

相关类别

General description

WL Differential media is recommended for selective isolation and enumeration of bacteria encountered in breweries and industrial fermentations. The presence of cyclohexamide inhibits the growth of yeasts.{4} Ready-to-use Liquid ampoule media solve numerous problems in microbiology laboratories where time, equipment and trained personnel are often in short supply. They are available in convenient, single test 2 mL plastic ampoules, eliminating the manipulation of glass ampoules and avoiding the waste and spoilage associated with bulk packaged media.

Application

WL differential media is used in the growth of acetic acid bacteria, Flavobacterium, Proteus and thermophilic bacteria under aerobic and growth of lactic acid bacteria and Pediococcus under anaerobic condition.{5}

Analysis Note

Bacteria appear as small colonies with green blue color. If cycloheximide resistant yeast grow, they are creamy, green-white
QC organisms
A. aceti (ATCC 15973)
Target Microorganisms: Aciduric bacteria (yeast and mold are inhibited)

Legal Information

MICROPRESURE is a registered trademark of Merck KGaA, Darmstadt, Germany
MILLIFLEX is a registered trademark of Merck KGaA, Darmstadt, Germany
MICROFIL is a registered trademark of Merck KGaA, Darmstadt, Germany

存储类别

12 - Non Combustible Liquids

wgk

WGK 1

flash_point_f

Not applicable

flash_point_c

Not applicable

法规信息

动植物来源培养基
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Compendium of methods for the microbiological examination of foods. 2001
American Public Health Association and others
American Public Health Association, 12, 43-43 (2001)
Paper read at American Society of Brewing Chemists Meeting
Wallerstein Laboratories Communications, 12, 43-43 (1950)

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