In order to be declared brain dead, a person needs to have no activity in either the brain or brain stem, at the base of the brain. Credit: Johan Swanepoel | Shutterstock View full size image.n Jahi's case, three doctors have concluded that she is brain-dead. However, the heart's intrinsic electrical system can keep the organ beating for a short time after a person becomes brain-dead â in fact, the heart can even beat outside the body, Greene-Chandos said.
Noun. 1. anisotropy-the property of being anisotropic; having a different value when measured in different directions. property-a basic or essential attribute shared by all members of a class; a study of the physical properties of atomic particles.
Prototropy is the most common form of tautomerism and refers to the relocation of a proton. Prototropic tautomerism may be considered as a subset of acid-base behavior. Prototropic tautomers are sets of isomeric protonation states with the same empirical formula and total charge.Tautomerizations are catalyzed by:here are two specific further subcategories of tautomerizations. Annular tautomerism is a type of prototropic tautomerism wherein a proton can occupy two or more positions of a heterocyclic system, for example, 1 H-and 3 H-imidazole; 1 H -, 2 H-and 4 H - 1,2,4-triazole; 1 H-and 2 H-isoindole.