2) Are there significant differences between users of different substances regarding these neuropsychological functions?
But even the most simple products can contain hundreds of different substances, which each need to be tested.
Scientists now know of a whole family of GPCRs that detect hundreds of different substances in and around the body.
Critics say the three-category ranking does not reflect the danger or addictiveness of different substances.
She said people find it hard to assess the relative risks of different substances when the message is uniformly "don't do drugs".
A single laptop may contain hundreds of different substances, dozens of metals, plastics and components which are expensive to dispose of.
"But Danny takes a lot of different substances – coke, ketamine, pills, marijuana, sweets, chocolate – so I wanted to make every reaction specific.
Tumour vaccines have been created by using a number of different substances, including tumour antigens and inactivated cancer cells.
(Appropriate design, in this context, means layers of different substances assembled in a way reminiscent of molecular puff pastry).
As water moves into the coffee particles or tea leaves, it dissolves or suspends hundreds of different substances and extracts them from the solids.
There has also been a generational change with drugs: more people have had experience with a range of different substances, and they're more educated and more mature about them.
