Book excerpt: Techniques in the Behavioral and Neural Sciences, Volume 12: Neglected Factors in Pharmacology and Neuroscience Research: Biopharmaceutics, Animal Characteristics, Maintenance, Testing Conditions can be used as reference in the improvement of test designs for biochemists and physiologists in the control of test conditions. The book is divided into five sections. The introduction deals with the uncertainty of animal characteristics and test conditions as hindrances to the development of general insight into biological regulatory mechanism. The first section discusses biopharmaceutics - the int...