WL 营养琼脂

NA.74

WL(Walerstein Laboratory)培养基遵照Green和Gray的配方配制，可用于检测酿造过程中的材料以及含有酵母和细菌混合菌群的工业发酵物。酵母提取物是维生素、氨基酸和痕量元素的来源。酶水解酪蛋白提供氮、氨基酸和碳。右旋糖是主要的碳和能量来源。磷酸钾是一种缓冲剂。培养基中的多种盐提供必需的离子，并有助于维持渗透平衡。溴甲酚绿作为pH指示剂，而琼脂则作为固化剂。WL营养琼脂是用于检测酿造过程中的材料以及含有酵母和细菌混合菌群的工业发酵物。

WL营养琼脂适用于：

• 使酵母母种复活并用于发酵后的种群动力学研究
• 从奶酪中分离的酵母的形态表征
• 用于平板培养发酵的葡萄酒的酵母菌分离

将80.25 g悬浮于1L蒸馏水中。加热至沸腾以完全溶解培养基。在121℃加热15分钟进行高压蒸汽灭菌。如果需要得到6.5的pH值，添加1%碳酸氢钠溶液。

我们现提供两种类型的培养基：GranuCult^®优质颗粒状培养基和NutriSelect^®高性价比粉末状培养基，满足用户不同层次的需求。
商标后的品级称号basic(基础)、plus(加强)或prime(特级)代表产品的不同质控水平，从基础的质控到标准质控加强版到全面合规的特级质控水平。

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

200

non-sterile

powder

limited shelf life, expiry date on the label

agar, 20 g/L
bromocresol green, 0.022 g/L
calcium chloride, 0.125 g/L
casein enzymic hydrolysate, 5 g/L
dextrose, 50 g/L
ferric chloride, 0.0025 g/L
magnesium sulfate, 0.125 g/L
manganese sulfate, 0.0025 g/L
monopotassium phosphate, 0.55 g/L
potassium chloride, 0.425 g/L
yeast extract, 4 g/L

NutriSelect^® Plus

microbiological culture: suitable

5.5±0.2 (25 ℃)

bioburden testing
food and beverages
microbiology

nonselective and differential for Candida spp.
nonselective and differential for Escherichia coli
nonselective and differential for Lactobacillus spp.
nonselective and differential for Pichia spp.
nonselective and differential for Proteus spp.
nonselective and differential for Saccharomyces spp.
nonselective and differential for Zygosaccharomyces spp.
nonselective and differential for bacteria (General Media)
nonselective and differential for coliforms
nonselective and differential for molds (General Media)
nonselective and differential for yeasts (General Media)

11 - Combustible Solids

WGK 3

Eyeshields, Gloves, type N95 (US)