Sentence examples for substances is necessary from inspiring English sources

Therefore extended exposure to the test substances is necessary to evaluate pharmacologic/toxicologic consequences on embryonic development.

Other researchers believe that the use of activating substances is necessary to stimulate the massive release of growth factors in the foci of the lesion and thus increasing the healing process of the affected tissue [ 32].

Therefore, the continuing efforts to search for new antibacterial substances are necessary and urgently needed.

Sugars, especially the disaccharides sucrose and trehalose, are thought to play important roles in cellular desiccation tolerance [ 19], but it is clear that additional substances are necessary for a cell to attain anhydrobiosis [ 20, 21].

These substances are necessary to sterilize the ear and the piercing tools before use.

A minimum tonnage of the manufactured or imported substance is necessary to trigger registration (1 t/a).

Aquinas would no doubt say that such observation of the immediate functioning of a simple substance is necessary in order to acquire a concept of its substantial nature, and so its real definition.

But EPA's test, conducted on just two kinds of sea animals -- one species of shrimp, and one species of small fish -- only tested to see how much of a substance was necessary to kill them.

To enhance the MCM-41 capacity in adsorbing specific substances, it is necessary to make surface modifications.

To enable an efficient tracing of misused anabolic substances it is necessary to develop new screening technologies for a broad range of illegal drugs including newly designed xenobiotic anabolic agents.

And for leaders, I don't think you can paint a picture, identify the foundational substance that is necessary to be consistent and get people on board, if you don't have a certain humility that comes from knowing that you failed before and you're willing to talk about that.