ammonium nitrogen

The charged ammonium nitrogen is closest to the side-chain of alpha4 Trp182.

Read the fine print to make sure that the fertilizer contains ammonium nitrogen, the kind preferred by acid-loving plants.

Fish and humans are more tolerant of nitrate nitrogen than they are of ammonium nitrogen.

Mitsch & Gosselink define nitrogen mineralisation as "the biological transformation of organically combined nitrogen to ammonium nitrogen during organic matter degradation".

The protonated ammonium nitrogen is also making polar interaction with the delocalized electron and backbone carbonyl of Trp182, and is less than 1A away from the quaternary nitrogen of docked acetylcholine.

Factors Affecting the Use of Nitrate and Ammonium Nitrogen by Apple Trees (with M.A. Blake), New Jersey Agricultural Experiment Station Bulletin 547, November 1932, pages.

The lake was drained in 2001 and specimen of water leaking out of the lake bed showed considerable levels of phosphorus phosphate and ammonium nitrogen, while levels of nutrients, zinc and copper were low.

The ammonium nitrogen value is also used in the context of properly designed landfill systems, where the leachate is being pumped to the surface and treated before it enters the ground water, testing the quality of the water exiting the treatment system.

By their distinctive color changes, levels of nutrients can be ascertained: nitrates show up yellow, ammonium nitrogen as yellow/orange, magnesium as pink/red, phosphorus as blue; potassium and calcium are measured by the turbidity of the liquid in the test-tube.