56156

M-17 肉汤

suitable for microbiology, NutriSelect^® Basic, selective medium for Streptococcus thermophilus

• 分類程式碼代碼: 41171607
• NACRES: NA.85

屬性

• 品質等級: 100
• 無菌: non-sterile
• 形狀: powder
• 儲存期限: limited shelf life, expiry date on the label
• 成份: ascorbic acid, 0.5 g/L ; lactose, 5 g/L ; magnesium sulfate, 0.25 g/L ; meat extract, 5 g/L ; meat peptone (peptic), 2.5 g/L ; sodium glycerophosphate, 19 g/L ; soya peptone (papainic), 5 g/L ; tryptone, 2.5 g/L ; yeast extract, 2.5 g/L
• 包裝: pkg of 500 g
• 製造商／商標名: NutriSelect^® Basic
• 技術: microbiological culture: suitable
• pH值: 7.0±0.2 (25 °C)
• 應用: food and beverages; microbiology
• 儲存溫度: 2-25°C
• 適合性: nonselective for Enterococcus spp.; nonselective for Staphylococcus spp.; nonselective for Streptococcus spp.

描述

一般說明

M-17 Broth is a selective medium for Streptococcus thermophilus in the common examination of yoghurt. It is superior to other comparable culture media for the cultivation of the fastidious species such as S. cremoris, S. diacetilactis and S. lactis. Mutants which are incapable of metabolizing lactose can also be isolated on these media. Tryptone, meat peptone, soya peptone, yeast extract and meat extract provide carbonaceous, nitrogenous compounds, vitamin B complex and other essential growth factors. Lactose is the fermentable carbohydrate and ascorbic acid is stimulatory for the growth of lactic Streptococci. Magnesium sulphate provides essential ions to the organisms. Sodium glycerophosphate increases the buffering capacity of the medium, this promotes the growth of lactic streptococci and inhibits lactobacilli growth.

應用

M-17 Broth is a selective medium for Streptococcus thermophilus for examination of yogurt and for the enrichment Streptococcus thermophilus in the dairy industry.

準備報告

Suspend 42 g of powder in 1 litre of distilled water and let it soak. Heat to boiling and dispense into suitable containers. Sterilize by autoclaving at 121°C for 15 minutes.

腳註

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.

法律資訊

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

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

安全資訊

• 儲存類別代碼: 11 - Combustible Solids
• 水污染物質分類（WGK）: WGK 3
• 閃點（°F）: Not applicable
• 閃點（°C）: Not applicable
• 個人防護裝備: Eyeshields, Gloves, type N95 (US)