nitrogenous waste


Also found in: Dictionary, Thesaurus, Encyclopedia.

nitrogenous waste

the waste nitrogen produced during METABOLISM. Initially this is often in the form of AMINO ACIDS, but few animals can excrete these directly. Many invertebrates and aquatic vertebrates eliminate nitrogen as ammonia, but this would be toxic if excess water were not available. Marine teleost fish excrete TRIMETHYLAMINE OXIDE, which is nontoxic and requires little water for elimination. Mammals, turtles and amphibians excrete UREA, and land reptiles, snails, insects and birds excrete URIC ACID from which water is removed before voiding it.
References in periodicals archive ?
Oxidative damage of kidney leading to functional deterioration it such as decreasing GFR and retention of nitrogenous waste such as urea, uric acid and creatinine [26].
Of particular concern is where calorie deficits increase the use of protein as an energy source, increasing production of nitrogenous waste.
Nitrogenous waste can also come from uneaten food in the tank and hence fishes should never be fed more than what they will eat immediately, twice a day.
Ammonia is often the primary nitrogenous waste product of insects that live in aquatic or very moist environments.
Nutri-Vet Green Grass and Grass Guard dietary supplements for dogs are formulated to neutralize nitrogenous waste and maintain a slightly acidic urine pH.
The approved patent, "Prebiotic and Probiotic Compositions and their Method of use for Gut-based Therapy," protects the composition and method behind the company's oral probiotic product formulation (Kibow Biotics) which may significantly reduce concentrations of several nitrogenous waste metabolites that accumulate in renal deficiency.
The primary nitrogenous waste products of protein, which are excreted by the kidneys, include urea nitrogen, creatinine, and uric acid.
If a plant emits less nitrogenous waste than its permit allows, it can save surplus credits for the upcoming year or sell them to less-efficient plants.