Abstractly, additive number theory includes the study of abelian groups and commutative semigroups with an addition operation.

The most common misuses of e-mail are fakemail and spam. Fakemail is the act of sending an e-mail that appears to be from another individual.

He turned into a side gallery that led into a grovy part of the garden, grading insensibly into the park proper.

Western blotting and immunofocussing would be an advantage.