计算溶液所需的质量、体积或浓度。
BioReagent,生物染色剂,用于显微镜 级 ,适用于对基线干扰要求严格的色谱和分析工作流程。
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在色谱分析、有机合成和交叉偶联反应领域已被 1404 篇同行评审文献引用。
亚甲基蓝(Methylene blue)又称美蓝、次甲基蓝、次甲蓝等,含水亚甲基蓝的分子式为C₁₆H₂₄ClN₃O₃S,分子量为373.9,CAS号为7220-79-3。活细胞具有新陈代谢作用,从而使活细胞内有较强的还原能力,能使美蓝从蓝色的氧化型变为无色的还原型。因此活细胞内的美蓝呈无色,死细胞或衰老的细胞还原能力极弱或消失,被美蓝染成蓝色或淡蓝色。
吕氏碱性美蓝染色液常用于酵母菌的染色,不但可以观察酵母菌的形态,还可以区分活细胞和死细胞。因其容易氧化,染色结果不宜长久保存。
使用方法
1、取一滴吕氏碱性美蓝染色液于载玻片中央,用接种环取酵母菌与其混合均匀。
2、取一块盖玻片,将盖玻片一边与菌体接触,缓缓将盖玻片倾斜并覆盖在菌液上。
3、放置约 3min 后,先用低倍镜后用高倍镜观察酵母的形态和出芽情况,并根据颜色区别死活细胞。
4、染色 30min 后,可再次观察,注意活细胞的变化。
染色结果
| 酵母菌活细胞 | 无色 |
| 酵母菌死细胞 | 蓝色或淡蓝色 |
注意事项
取酵母菌时,应注意无菌操作。
Methylene blue, also known as methylthioninium chloride, methylene blue, or basic blue 9, has the molecular formula C₁₆H₂₄ClN₃O₃S for its hydrated form, a molecular weight of 373.9, and a CAS number of 7220-79-3. Living cells exhibit metabolic activity, which confers strong reducing capacity within them. This reduces methylene blue from its blue oxidized form to its colorless reduced form. Consequently, methylene blue appears colorless inside living cells. Dead or senescent cells possess very weak or no reducing capacity and are therefore stained blue or pale blue by methylene blue.
Löffler's alkaline methylene blue staining solution is commonly used for staining yeast cells. It not only allows observation of yeast morphology but also distinguishes between live and dead cells. Due to its susceptibility to oxidation, the staining results should not be stored for extended periods.
Usage Protocol
Place a drop of Löffler's alkaline methylene blue staining solution onto the center of a clean glass slide. Using an inoculation loop, mix a small amount of yeast culture uniformly with the stain.
Take a coverslip, place one edge in contact with the suspension, and gently lower the coverslip to cover the mixture.
Allow it to stand for approximately 3 minutes. First observe under low magnification, then switch to high magnification to examine yeast morphology and budding. Distinguish between live and dead cells based on their color.
After 30 minutes of staining, observe again to note any changes in the live cells.
Staining Results
| Yeast Cell Type | Color |
| Live yeast cells | Colorless |
| Dead yeast cells | Blue or pale blue |
Precautions
When handling yeast cultures, aseptic technique must be observed.
H302: 吞食有害
P264: 处理后要彻底洗手。
P270: 使用本产品时,请勿进食、饮水或吸烟。
P501: 将内容物/容器送到批准的废物处理厂处理
P301+P317: 如果被吞咽:请寻求医疗帮助。
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| 批号(Lot Number) | 证书类型 | 货号 |
|---|---|---|
| 分析证书 | L1509206 | |
| 分析证书 | L1509206 | |
| 分析证书 | L1509206 | |
| 分析证书 | L1509206 |
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