Nowadays, studies on biological effects of noise are mostly focused on the effect of audio noise, but studies of the effect of ultrasonic cleaning noise on human haven't been found yet.

目前，噪声的生物效应多集中于研究音频噪声造成的危害，而关于超声波清洗空化噪声对生物体生理机能影响的研究还未见报道。

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The significance and the schemes of cleaning production in biological pharmacy were described in this article.

阐述生物制药清洁生产的意义及方案。

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Since silver nanoparticles act in cleaning biological stains and smells by producing hydroxyl and other oxygen radicals, which are toxic in vivo, then if they were ingested the consequences could be dire.

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It also ignores the considerable value of services derived from the physical, biological, and chemical processes in natural ecosystems, including nutrient recycling, flood risk reduction, water cleaning and storage, climate regulation, and maintenance of biodiversity.

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