Cytokeratin shedding in urine: a biological marker for bladder cancer? MODULATIOM OF THE HUMORAL IMMUNE RESPONSE OF RAINBOW TROUT EXPOSED TO ECOTOXIC STRESS FACTORS PROTECTIVE EFFECTS OF GARLIC "ALLIUM SATIVUM" AND KARKADA "HIBISCUS SABDARRIFA" ON ACRYLAMIDE TREATED MALE ALBINO RATS EFFECT OF HYPERCHOLESTEROLEMIA AND ISOSORBIDE DINITRATE ADMINISTRATION ON SERUM NITRIC OXIDE AND SOME RELATED BIOCHEMICAL PARAMETERS IN MALE ALBINO RATS