He also drew my Attention to what he claimed were certain impurities in the material of my Cupel.

However, metals and ceramics can be treated with certain impurities, and metals can be mechanically worked to make their grain structures directional.

This is commonly used for cooling gases whilst also removing certain impurities, thus solving two problems at once.

With the addition or elimination of certain impurities under controlled conditions, diamonds of various color can be produced.

It had come down from Esau and Samson, and had been accumulating hair ever since--along with certain impurities.

The water of this spring is believed to be beneficial for skin diseases and for certain impurities of the blood.

The presence of salts and certain other impurities, especially calcium, could interfere with the strand interactions and caution is used to avoid inclusion in its production.

The reverse may also occur if certain impurities of thought are not eradicated.

Basic sediment and water (BS&W) is a technical specification of certain impurities in crude oil.

Furthermore, certain impurities such as iron or copper need to be absent, to prevent quenching of possible fluorescence.