abstract amino acids are building blocks of proteins, and play a vital role in living beings existence and their functionality. the interaction of these compounds with metal ions is of great importance to biochemists, and chemists, because their functions can be utilized as a model in understanding enzymes mechanism for transport of metal ions to tissues. among twenty essential amino acids w...

  Background : Injuries are the most leading cause of death in many countries and head injuries form a large number of them. Accidents are preventable and preventing them is one of the major factors in having a healthy society.   Objective : To explain the characteristics of head injuries in relation to time, place and cause of accidents. Also to find out the association between the occurrence ...

investigation the archetype of mother can help the reader to understand poes works, especially his fiction, better, if not fully. motivated by internal and external drives to get into the universe in its manifold form poe was impelled to art and, from various modes of art, to symbolism. how much was poe successful to produce works of art has been a matter of dispute among critics. however, ther...