Toxic Effect of Urea on Plants: Damage to Plant Roots caused by Urea and Anhydrous Ammonia

A simple 1,10-phenanthroline-based fluorescent receptor in solution and 1,10-phenanthroline in solid state for urea recognition

“…It is the chief nitrogeneous N-product of nitrogen metabolism and a wellknown protein denaturant that can cause damage even in low concentrations. Urea is toxic and a well-known pollutant that causes serious biological disorder [1][2][3][4]. Development of an artificial receptor [5,6] with high affinity for urea is important in the clinical identifications of diabetes, kidney and thyroid disease.…”

Seed dispersal but not seed germination facilitated by seabirds: seed ecology of Cook’s scurvy grass

“…Nitrogen toxicity is more often problematic than elevated phosphorus in seabird colony environments (Ellis et al 2011) and was 10 times greater in guano than found associated with natural soils supporting populations of L. oleraceum. Nitrogen toxicity from ammonia, ammonium and nitrite have previously been observed to reduce germination of seed (Cooke 1962;Court et al 1962;Barker et al 1970;Westwood & Foy 1999). Ammonium and nitrate were at least an order of magnitude higher in fertiliser than guano (Table 1), so the lack of similarity between germination of the 0.5 gNL -1 fertiliser to 5 gNL -1 guano treatments suggests neither ammonium nor nitrate were inhibiting germination.…”

A benzthiazole-based simple receptor in fluorescence sensing of biotin ester and urea

“…4 Similarly urea is also of particular importance as it is toxic, pollutant, and causes serious biological disorders. 14,15 To the best of our knowledge, very few fluorescent receptors for urea recognition are known in the literature. Goswami et al have reported the fluorometric detection of urea by a macrocyclic receptor.…”