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Product details
名称
磷钨酸负染色液 (2%)
分子类型
生物试剂/缓冲液
英文名称
Hosphotungstic Acid Negative Staining Solution (2%)
货号
P774768-100ml
包装规格
100ml
级别
BioReagent
浓度
2%
储存温度
避光,室温
运输条件
常规运输
稳定性与储存
Store at room temperature long term (12 months). Store in the dark.
敏感性
Light-sensitive
产品介绍
负染色又称阴性染色,是由Hall发现的相对于普通染色(即正染色)而言的染色技术。其原理在于利用重金属盐包绕低电子密度的样品,增强样本四周的电子密度,造成细微结构之间的质量-厚度差异,增强散射吸收反差,使样品在黑暗的背景上呈现明亮的结构。负染色液有磷钨酸、钼酸铵、印度墨汁等,其中最常用的是1~3%磷钨酸。 磷钨酸负染色液(2%)适用于显示大分子、细菌、病毒、原生动物、噬菌体、细胞器、核酸大分子、蛋白质晶体及其他大分子材料等。染色后的样品图像呈现透明的亮光,而背景图像呈黑色。 使用说明: 一、滴染法 1. 样品低速离心 (2000g,10min) 或采用其他方法浓缩样品,制成悬浮液并且使其达到一定浓度和纯度。 2. 将样品悬浮液直接滴于带有支持膜的载网上,静置3~5min。 3. 用滤纸条从液滴边缘吸去多余液体,稍干燥。 4. 滴加负染色液,静置2~3min。 5. 吸去多余染色液,自然干燥,进行显微镜观察。 二、漂浮法 1. 样品低速离心 (2000g,10min) 或采用其他方法浓缩样品,制成悬浮液并且使其达到一定浓度和纯度。 2. 将带有支持膜的载网置于样品液滴上漂浮以沾取样品。 3. 载网置于负染色液上漂浮1~2min。 4. 吸去多余染色液,自然干燥,进行显微镜观察。 注意事项: 1、目的样本尽量新鲜。 2、样品应为均匀的悬浮液,其纯度和浓度应适宜,否则无法与染色剂之间产生特异和清晰的结合反应。 3、为了您的安全和健康,请穿实验服并戴一次性手套操作。 染色结果 样品
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Research chemical 2%; 100ml

Research chemical 2%; 100ml; supplied for laboratory research, analysis, inspection, and scientific procurement use; specifications: 2%; 100ml.

item number:P774768-100ml
Product model:100ml
level: 2%; 100ml
Lead Time:30days
sold 567 Items
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Specifications:

100ml

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