介绍了水中阴离子表面活性剂测定新方法，该法与亚甲蓝法比较，具有操作步骤简单，萃取剂用量少的优点。
The new method in the determination of negative ion surface-active agent is introduced, comparing with methylene blue method, it have merits of simple operation step and little dosage.
遗憾的是，亚甲蓝扩增染色内镜法仅探及3个经组织学证实的非典型增生患者中的1个。
Unfortunately, methylene blue magnification chromoendoscopy detected only 1 of 3 patients with biopsy-documented dysplasia.
遗憾的是，亚甲蓝扩增染色内镜法仅探及3个经组织学证实的非典型增生患者中的1个。
Unfortunately, methylene blue magnification chromoendoscopy detected only 1 of 3 patients with biopsy-documented dysplasia.
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