In the modern synthesis, zinc is the reductant in the presence of a base.

They cannot know of the presence of a Romulan base here.

Some metal hydrides form when a metal complex is treated with hydrogen in the presence of a base.

As noted some complexes heterolytically cleave dihydrogen in the presence of a base.

Ligation does not generally occur in the presence of a mismatched 3' base.

The presence of a large American military base in the country provides the country with a guaranteed source of defense and national security.

Typically, such reactions are conducted in the presence of a base such as pyridine.

The compound can be made by reaction of acetylene and methanol in presence of a base.

Dissociation can occur in the presence of a suitable base.

This reaction proceeds by reacting phenylacetonitrile with 2-chloropyridine in the presence of a base.