That is where active substances of this kind are developed.

The influence of these two active substances is sure to differ from one individual to another.

Should we, then, allow an active substance in cosmetic products with absolutely no means of control?

The term has since changed its meaning to become an established field of drug research, where the active substances come from plants.

If only a few active substances are used, resistance to pesticides will develop more quickly.

Many of the active substances in black tea do not develop at temperatures lower than 90 C.

It leads us to ban active substances which do not pose any problem at all in practice.

Clear and strict criteria would be set for the approval of active substances.

In reality, the question raised concerns new, active substances.

There is proof that this is a very active substance.

As a result, not enough active substances will be available in future to combat pests properly.

Of the several active substances which were isolated, the cephalosporins have become particularly valuable.

It is a health condition involving biologically active substances in the brain.

The sclerotia have a lower content of active substances than the actual mushrooms themselves.

Such an incorporeal, active substance is called a Spirit.

Each nanocapsules is varied by size, drug concentrations, and active substance release time.

One class of emulsifiers is known as "surface active substances", or surfactants.

All three are osmotically active substances found in humans.

Enrollment of active substance abusers into drug and/or alcohol treatment programs is strongly recommended.

This represents a new process for the precisely located dispensing of active substances to the eye.

Depending on the quality of the extraction, the remaining solid matter may have some residual active substances.

He said it might even be possible to enrich other foods with the biologically active substances in tea.

"We do not accept active substance abusers, and there is no drinking or drugging allowed."

Methods of extracting the active substance from the Penicillium cultures had to be found.

Parliament could not hand over a blank cheque for something as important as the definition of active substances.