MHA000P2N

Wallerstein Nutrient Broth

ready-to-use, ampule of 2 mL, for molds, for bacteria, for yeasts, suitable for microbiology

• 同義詞: WL Nutrient broth, WLNB, Wallerstein Laboratory Nutrient Broth
• 分類程式碼代碼: 41106225
• eCl@ss: 32160801
• NACRES: NA.74

屬性

• 形狀: liquid
• 品質等級: 100
• 儲存期限: 12 mo.
• 特點: ready-to-use
• 包裝: ampule of 2 mL; pack of 50 tests
• 顏色: slightly opalescent green-blue
• 輸入: 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: 5.5±0.2 (25.0 °C)
• 應用: 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^®
• 運輸包裝: wet ice
• 儲存溫度: 2-8°C
• 適合性: bacteria; molds; yeasts

描述

一般說明

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.

應用

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.

特點和優勢

• 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.

規格

Incubation Temperature: 35 °C ± 2 for bacteria; 30 °C ± 2 for yeasts and molds

Incubation Time: 48–72 hrs

分析報告

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

法律資訊

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

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

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

安全資訊

• 儲存類別代碼: 12 - Non Combustible Liquids
• 水污染物質分類（WGK）: WGK 2
• 閃點（°F）: Not applicable
• 閃點（°C）: Not applicable