Wallerstein Nutrient Broth

别名:WL Nutrient broth, WLNB, Wallerstein Laboratory Nutrient Broth

eCl@ss:32160801

NACRES:NA.74

属性
形式
liquid

质量水平
100

保质期
12 mo.

特点
ready-to-use

包装
ampule of 2 mL
pack of 50 tests

颜色
slightly opalescent green-blue

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

pH值（酸碱度）
5.5±0.2 (25.0 °C)

application(s)
environmental
food ａnd beverages
industrial qc
microbiology

相容性
for use with MF-method
for use with Microfil®
for use with MicropreSure®
for use with Milliflex®

运输
wet ice

储存温度
2-8°C

适用性
bacteria
molds
yeasts

说明
一般描述
Wallerstein Nutrient Broth is recommended for the isolation ａnd cultivation of yeasts, molds ａnd bacteria that grow in a low pH environment mainly in the beverage industry. Yeast extract in the medium is a source of trace elements, vitamins ａnd amino acids. Peptone provides nitrogen, amino acids ａnd carbon. Dextrose is a source of carbohydrates. Monopotassium phosphate buffers the media. Potassium chloride, calcium chloride, ａnd ferric chloride are essential ions to help to maintain osmotic balance. Magnesium sulfate ａnd manganese sulfate are sources of divalent cations. Bromocresol green is the pH indicator. The WL Nutrient medium plate incubated under aerobic conditions enables the growth of mainly yeast colonies, acetic acid bacteria, flavobacterium, proteus ａnd thermophilic bacteria ａnd under anaerobic condition enables the growth of lactic acid bacteria ａnd Pediococcus. Bacterial colonies appear as non-pigmented to white, with a smooth or rough texture. Yeast appears as large creamy to white colonies.
应用
Wallerstein Nutrient Broth is used in the examination of materials encountered in brewing ａnd for industrial fermentations containing mixed flora of yeast ａnd bacteria. It is used in the beverage industry to detect bacteria, yeast, ａnd mold in wines, beer ａnd other fermentation products.
特点和优势
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.
产品规格
Incubation Temperature: 35 °C ± 2 for bacteria; 30 °C ± 2 for yeasts ａnd molds
Incubation Time: 48–72 hrs
分析说明
QC organisms
发酵乳杆菌 (ATCC 9338)

酿酒酵母 (ATCC 9763)
细菌菌落可显示为非色素至白色，具有平滑或粗燥纹理。 酵母显示为更大的乳白色、白色菌落。
Target Microorganisms: Lactic acid bacteria, yeast ａnd mold

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5 ≤IF≤10，赠送价值 1000元礼品卡
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发表刊物        影响因子           奖励金额
SCI期刊杂志      1.0≤1F＜3.0          200元
SCI期刊杂志      3.0≤1F＜6.0          400元
SCI期刊杂志      6.0≤1F＜10.0         600元
SCI期刊杂志      1F≥10                1000元