Cold Ischemia; Hypothermia, Induced; Kidney Transplantation/methods; Kidney/surgery; Organ Preservation/methods; Perfusion/methods; Pulsatile Flow; Tissue and Organ Harvesting; Animals; Creatinine/metabolism; Fatty Acid-Binding Proteins/metabolism; Kidney/blood supply; Kidney/metabolism; Kidney/physiopathology; Kidney Transplantation/adverse effects; Kruppel-Like Transcription Factors/genetics; Kruppel-Like Transcription Factors/metabolism; Nitric Oxide/metabolism; Nitric Oxide Synthase Type III/genetics; Nitric Oxide Synthase Type III/metabolism; Organ Preservation/adverse effects; Perfusion/adverse effects; Perfusion/instrumentation; RNA, Messenger/metabolism; Recovery of Function; Renal Circulation; Sodium/metabolism; Swine; Time Factors; Tissue and Organ Harvesting/adverse effects; Urea/metabolism; Urodynamics; Vascular System Injuries/etiology; Vascular System Injuries/physiopathology; Vascular System Injuries/prevention & control