Hydronephrosis/physiopathology; Hypertension/metabolism; Nitric Oxide/deficiency; Animals; Arginine/analogs & derivatives; Arginine/pharmacology; Arginine/urine; Blood Pressure/drug effects; Blood Pressure/physiology; Disease Models, Animal; Diuresis/drug effects; Diuresis/physiology; Enzyme Inhibitors/pharmacology; Hydronephrosis/complications; Hydronephrosis/metabolism; Hydronephrosis/pathology; Hypertension/etiology; Indazoles/pharmacology; Kidney/drug effects; Kidney/metabolism; Kidney/pathology; Kidney/physiopathology; Kidney Cortex/metabolism; Kidney Cortex/pathology; Kidney Cortex/physiopathology; Kidney Tubules, Proximal/drug effects; Kidney Tubules, Proximal/physiopathology; Male; NG-Nitroarginine Methyl Ester/pharmacology; Nitric Oxide Synthase Type I/antagonists & inhibitors; Nitric Oxide Synthase Type I/metabolism; Nitric Oxide Synthase Type III/antagonists & inhibitors; Nitric Oxide Synthase Type III/metabolism; Potassium/urine; Rats; Rats, Sprague-Dawley; Sodium/urine; Sodium Chloride, Dietary/pharmacology; Ureteral Obstruction/complications