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These preparative mass spectrometers can be used to produce chemical compounds in a new way.

In the context of her research, an “artifact” is a particular result of the preparative or investigative part of a scientific procedure — i.e., an unnatural one.

Because the required alkylidyne catalysts have also been greatly improved in terms of activity, functional group tolerance, and user-friendliness, this method constitutes a valuable preparative complement.

A laugh, if no argument, is a splendid preparative.

For philosophy, in its highest sense, as the science of ultimate truths, and therefore scientia scientiarum, this mere analysis of terms is preparative only, though as a preparative discipline indispensable.