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质量水平
无菌性
non-sterile
形式
powder
保质期
limited shelf life, expiry date on the label
组成
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
包装
pkg of 500 g
制造商/商品名称
NutriSelect® Basic
技术
microbiological culture: suitable
pH值（酸碱度）
7.0±0.2 (25 °C)
应用
food and beverages
microbiology
储存温度
2-25°C
适用性
nonselective for Enterococcus spp.
nonselective for Staphylococcus spp.
nonselective for Streptococcus spp.
一般描述
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.
应用
M-17 Broth is a selective medium for Streptococcus thermophilus for examination of yogurt and for the enrichment Streptococcus thermophilus in the dairy industry.
制备说明
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.
附注
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.
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.
法律信息
GRANUCULT is a registered trademark of Merck KGaA, Darmstadt, Germany
NutriSelect is a registered trademark of Merck KGaA, Darmstadt, Germany
WGK
WGK 3
闪点(°F)
Not applicable
闪点(°C)
Not applicable
个人防护装备
Eyeshields, Gloves, type N95 (US)
法规信息
动植物来源培养基
Simple and rapid method for isolating large plasmid DNA from lactic streptococci.Simple and rapid method for isolating large plasmid DNA from lactic streptococci.
Anderson, Douglas G., and Larry L. Mckay.
Applied and Environmental Microbiology, 46 (3), 549-552 (1983)
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