|Diffusion is movement of particles solids, liquids or gases from the high concentration to the level of low concentration. This usually results in attaining of equilibration. Diffusion is a passive type of transport which does not involve any usage of chemical energy. Concentration gradient plays an important role in the process of diffusion. Diffusion may be simple or facilitative or active transport.
Scholarly peer review is the process of subjecting an author's scholarly work, research, or ideas to the scrutiny of others who are experts in the same field, before a paper describing this work is published in a journal. The work may be accepted, considered acceptable with revisions, or rejected. Peer review requires a community of experts in a given (narrowly defined) field, who are qualified and able to perform reasonably impartial review.