计算溶液所需的质量、体积或浓度。
CellNourish™ Basic,超纯级,适用于微生物学 级 ,适用于对基线干扰要求严格的色谱和分析工作流程。
避光,室温,充氩。常规运输 。请查阅批次 COA 获取详细规格。
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在色谱分析、有机合成和交叉偶联反应领域已被 241 篇同行评审文献引用。
以纯化培养的面包酵母为原料,经自溶酶解、离心分离、三效真空浓缩得到的膏状产品
酵母提取物是由各种酵母菌生产的——主要是酿酒酵母(Saccharomyces cerevisiae)或面包酵母(baker’s yeast)。酵母提取物除了用作微生物研究和生物技术的培养基补充剂外,还用作工业发酵复合培养基的成分。它还可以作为各种微生物培养基的营养源。
性状描述
浅黄色膏体,易溶于水;
富含游离氨基酸、多肽、B族维生素、核苷酸、微量元素等
应用
用于各种微生物的一般细菌学用途。 酵母提取物可用作以下成分: 培养大肠杆菌克隆的复合培养基,适用于摇瓶实验 培养基,用于培养木质醋酸菌(Gluconacetobacter xylinus)的培养基 用于农杆菌转化的酵母提取物牛肉(YEB)培养基 酵母提取物被用作多种微生物和分子遗传学应用的细菌学培养基成分。
理化特性
检测项目 | 指标 |
溶解度(%,常温) | 2%完全溶解 |
pH(2%溶液) | 4.0-7.2 |
水分(%) | ≤35.0 |
总氮(%) | ≥10.0 |
氨基氮(%) | ≥4.0 |
灰分(%) | ≤15.0 |
NaCl(%) | ≤2.0 |
微生物指标
检测项目 | 指标 |
菌落总数(cfu/g) | ≤50000 |
大肠菌群(MPN/g) | ≤0.3 |
酵母菌(cfu/g) | ≤10.0 |
霉菌(cfu/g) | ≤10.0 |
沙门氏菌,/25g | 不得检出 |
志贺氏菌,/25g | 不得检出 |
金黄色葡萄球菌,/25g | 不得检出 |
重金属
检测项目 | 指标 |
总砷(ppm) | ≤0.5 |
铅(ppm) | ≤1.0 |
汞(ppm) | ≤0.5 |
氨基酸
氨基酸种类 |
| 游离氨基酸(%) | 水解氨基酸(%) |
天冬氨酸 | Asp | 1.0 | 1.99 |
苏氨酸 | Thr | 0.7 | 2.04 |
丝氨酸 | Ser | 2.1 | 7.43 |
谷氨酸 | Glu | 0.5 | 1.98 |
甘氨酸 | Gly | 2.9 | 4.45 |
丙氨酸 | Ala | 1.3 | 0.52 |
半胱氨酸 | Cys | 1.5 | 2.45 |
缬氨酸 | Val | 0.8 | 0.79 |
甲硫氨酸 | Met | 1.0 | 2.06 |
异亮氨酸 | Ile | 0.9 | 4.51 |
亮氨酸 | Leu | 1.4 | 3.06 |
酪氨酸 | Tyr | 0.7 | 1.46 |
苯丙氨酸 | Phe | 0.9 | 1.24 |
赖氨酸 | Lys | 0.9 | 3.24 |
组氨酸 | His | 0.2 | 0.88 |
精氨酸 | Arg | 1.1 | 2.47 |
脯氨酸 | Pro | 0.6 | 1.76 |
合计 |
| 18.5 | 42.33 |
ps :以上指标仅供参考,具体数值以每批实测为准
Purified and cultivated baker's yeast is used as a raw material, and it is a paste product obtained by autolysing enzymatic hydrolysis, centrifugal separation, and three-effect vacuum concentration
Yeast extract is produced by various yeast species mainly by Saccharomyces cerevisiae or baker’s yeast. In addition to its use as a supplement in culture media for microbial research and biotechnology, yeast extract is also used as a component of the complex media for industrial fermentations.It also serves as a nutritional source for various microbial media.
Description
Light yellow paste, easily soluble in water;
Rich in free amino acids, peptides, B vitamins, nucleotides, trace elements, etc.
Application
For general bacteriological use with a variety of microorganisms.
Yeast Extract has been used as a component of:
complex media for culturing E. coli clones for shake flask experiments
culture media for culturing bacterial species Gluconacetobacter xylinus
yeast extract beef (YEB) media for the transformation of Agrobacterium
Yeast extract is used as a bacteriological media component for a variety of microorganisms and molecular genetics applications.
Physical-chemical characteristics
Test items | index |
Solubility (% ,normal temperature) | 2% completely dissolved |
pH (2% solution) | 4.0-7.2 |
Moisture (%) | ≤35.0 |
Total nitrogen (%) | ≥10.0 |
Amino nitrogen (%) | ≥4 .0 |
Ash content (%) | ≤15.0 |
NaCl (%) | ≤2.0 |
Microbiology
Test items | index |
Total number of colonies(cfu/g) | ≤50000 |
Coliform group(MPN/g) | ≤0.3 |
Yeast(cfu/g) | ≤10.0 |
Mold(cfu/g) | ≤10.0 |
Salmonella,/25g | Not check out |
Shigella,/25g | Not check out |
Staphylococcus aureus,/25g | Not check out |
Heavy metals
Test items | index |
Total arsenic(ppm) | ≤0.5 |
Lead(ppm) | ≤1.0 |
Mercury(ppm) | ≤0.5 |
Amino acid composition
Types of amino acids |
| Free amino acid ( % ) | Hydrolyzed amino acid ( % ) |
Aspartic acid | Asp | 1.0 | 1.99 |
Threonine | Thr | 0.7 | 2.04 |
Serine | Ser | 2.1 | 7.43 |
Glutamate | Glu | 0.5 | 1.98 |
Glycine | Gly | 2.9 | 4.45 |
Alanine | Ala | 1.3 | 0.52 |
Cysteine | Cys | 1.5 | 2.45 |
Valine | Val | 0.8 | 0.79 |
Methionine | Met | 1.0 | 2.06 |
Isoleucine | Ile | 0.9 | 4.51 |
Leucine | Leu | 1.4 | 3.06 |
Tyrosine | Tyr | 0.7 | 1.46 |
Phenylalanine | Phe | 0.9 | 1.24 |
Lysine | Lys | 0.9 | 3.24 |
Histidine | His | 0.2 | 0.88 |
Arginine | Arg | 1.1 | 2.47 |
Proline | Pro | 0.6 | 1.76 |
total |
| 18.5 | 42.33 |
ps :The above indicators are for reference only, the specific values are subject to the actual measurement of each batch
分类树(Taxonomy Tree)
| 界(kingdom) | 有机化合物 |
|---|---|
| 超类(Superclass) | 苯类化合物 |
| 类(Class) | 芴 |
| 亚类(Subclass) | 暂无 |
| 中间层级节点(Intermediate Tree Nodes) | 暂无 |
| 直接上位类(Direct Parent) | 芴 |
| 其他上位类(Alternative Parents) | 萘 一元羧酸及其衍生物 羧酸 有机氧化物 碳氢化合物衍生物 羰基化合物 |
| 分子骨架(Molecular Framework) | 芳香族同多环化合物 |
| 取代基(Substituents) | 芳香族同多环化合物 - 羰基 - 羧酰胺基 - 羧酸衍生物 - 芴 - 烃衍生物 - 单羧酸或其衍生物 - 萘 - 有机氧化物 - 有机氧化合物 - 有机氧化合物 |
| 描述(Description) | 该化合物属于芴类有机化合物。这类化合物含有芴基结构单元,该单元由两个苯环通过环戊烷、环戊烯或环戊-1,3-二烯连接而成。 |
| 外部描述符(External Descriptors) | 暂无 |
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