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Urea is a less toxic compound than ammonia; two nitrogen atoms are eliminated through it and less water is needed for its excretion. It requires 0.05 L of water to excrete 1 g of nitrogen, approximately only 10% of that required in ammonotelic organisms. [citation needed]
Cellular waste products are formed as a by-product of cellular respiration, a series of processes and reactions that generate energy for the cell, in the form of ATP. One example of cellular respiration creating cellular waste products are aerobic respiration and anaerobic respiration .
Digestate typically contains elements, such as lignin, that cannot be broken down by the anaerobic microorganisms. Also, the digestate may contain ammonia that is phytotoxic, and may hamper the growth of plants if it is used as a soil-improving material. For these two reasons, a maturation or composting stage may be employed after digestion.
Ammonia is a direct or indirect precursor to most manufactured nitrogen-containing compounds. It is the precursor to nitric acid, which is the source for most N-substituted aromatic compounds. Amines can be formed by the reaction of ammonia with alkyl halides or, more commonly, with alcohols: CH 3 OH + NH 3 → CH 3 NH 2 + H 2 O
Urine contains large quantities of nitrogen (mostly as urea), as well as reasonable quantities of dissolved potassium. [15] The nutrient concentrations in urine vary with diet. [16] In particular, the nitrogen content in urine is related to quantity of protein in the diet: A high protein diet results in high urea levels in urine. The nitrogen ...
Ammonia seeps into aquatic ecosystem in many different ways from both anthropogenic (waste water, fertilizers, and industrial waste) and natural (Nitrogen fixation and air deposition) sources. [20] Ammonia is toxic to most aquatic life including fish, corals, and planktonic crustaceans. [21] Ammonia can have 2 different forms in water.
For this reason, few examples exist of complexes containing both CO and N 2 ligand. Transition metal-dinitrogen complexes can contain more than one N 2 as "end-on" ligands, such as mer-[Mo(N 2) 3 (PPr n 2 Ph) 3], which has octahedral geometry. [15] In another example, the dinitrogen ligand in Mo(N 2) 2 (Ph 2 PCH 2 CH 2 PPh 2) 2 can be reduced ...
This is known as carbon isotope discrimination and results in carbon-12 to carbon-13 ratios in the plant that are higher than in the free air. Measurement of this isotopic ratio is important in the evaluation of water use efficiency in plants, [32] [33] [34] and also in assessing the possible or likely sources of carbon in global carbon cycle ...