Laboratory protocols require careful labeling and storage of chemical substances to prevent accidents.

When minnows detected the alarm substances, they swam to deeper water and formed a tighter shoal.

In determining the constitutionality of the statute, the court focused on the pith and substance of the law rather than its incidental effects.

The lab identified a rare chemical substance that could revolutionize battery technology.

During the inflammatory response, substance P is released from sensory neurons and amplifies pain signaling.

The laboratory confirmed that the sample was an elementary substance composed solely of hydrogen molecules.

After losing his job, he struggled with substance abuse before finding help.

Substance-wise, the new policy offers little improvement over the old one.

Although his speech wandered through many topics, the sum and substance of his message was a call for unity.

Law enforcement officers seized several controlled substances during the traffic stop.