But the students identified bitter substances regardless of their hunger.

Phenolphthalein is used in a test to identify substances that are thought to be, or to contain, blood.

Paper chromatography is one method for testing the purity of compounds and identifying substances.

A test that helps identify substances to which a person may be allergic.

A blood test that helps identify substances causing a person's allergy symptoms.

It simplifies the data with an interface to easily help identify unknown substances.

This makes it possible to identify different substances within a test sample.

We spend $10 million a year on our steroid and drug programs, including the funding of research to identify new substances and improve testing.

The detector identifies substances even through the walls of their containers.

Uses: This power may be used to identify poisons or other dangerous substances, identifying contents of an object, and finding out what is below ground.