Stoichiometry is a method for calculating the amount of substances in a chemical reaction.

His and her opinions ended up in a six of one, half a dozen of the other argument.

He is writing a thesis on the Yellow Peril.

He is interested in geometrical shapes.

He is conducting research on historical kana usage.

He often thinks about problems from a humanitarian perspective.

His company is facing the risk of a hostile takeover.

He is spending a lot of time on experimental research.

That plan is too impractical, it's difficult to implement.

His plan was so unrealistic that no one could believe it.