Abstract: The present invention relates to compositions and the use of such compositions in the formulation of preservation solutions for protecting mammalian (including human) biological systems such as biotechnological preparations (including recombin 10d3 ant proteins), organs, tissues (including whole blood and blood derivatives such platelets and plasma) and cells (including red blood cells, pancreatic ss-cells, stem cells and germ cells) from oxidative damage occurring, for example, during the different phases of transplantation and surgery. More particularly, this invention relates to a method for protecting and/or enhancing viability of mammalian biotechnological preparations/cells/tissues/organs during isolation (or harvesting), preservation (or storage), expansion (or colture), transplantation and surgery by using compositions containing effective amount of antioxidant cyclic (bis)-hydroxylamines derived from N-piperidine.