UAN - definição. O que é UAN. Significado, conceito
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O que (quem) é UAN - definição

SOLUTION OF UREA AND AMMONIUM NITRATE IN WATER USED AS A FERTILIZER
Urea ammonium nitrate; Urea Ammonium Nitrate (UAN)

UAN         
User Action Notation. A notation from VPI for representation of activity in a graphical user interface. [H. Hartson et al, ACM Trans on Info Sys, July 1990]. (1994-10-31)
UAN         
UAN is a solution of urea and ammonium nitrate in water used as a fertilizer. The combination of urea and ammonium nitrate has an extremely low critical relative humidity (18% at 30 °C) and can therefore only be used in liquid fertilizers.
Uan Muhuggiag         
ARCHAEOLOGICAL SITE IN LIBYA
Uan Muhuggiag is an archaeological site in Libya. It was occupied by pastoralists during the early- to mid-Holocene.

Wikipédia

UAN

UAN is a solution of urea and ammonium nitrate in water used as a fertilizer. The combination of urea and ammonium nitrate has an extremely low critical relative humidity (18% at 30 °C) and can therefore only be used in liquid fertilizers. The most commonly used grade of these fertilizer solutions is UAN 32.0.0 (32%N) known as UN32 or UN-32, which consists of 45% ammonium nitrate, 35% urea and only 20% water. Other grades are UAN 28, UAN 30 and UAN 18. The solutions are quite corrosive towards mild steel (up to 0.5 inches (1.3 cm) per year on C1010 steel) and are therefore generally equipped with a corrosion inhibitor to protect tanks, pipelines, nozzles, etc. Urea–ammonium nitrate solutions should not be combined with calcium ammonium nitrate (CAN-17) or other solutions prepared from calcium nitrate. A thick, milky-white insoluble precipitate forms that may plug nozzles.

Exemplos do corpo de texto para UAN
1. The new projects where ISO Propyl Alcohol, Aluminum Die Cast Parts for Automotive Industry, ISO Standard Dry Shipping Containers, Ultra Thin Aluminum Foil, and Nitric Acid & UAN–32 Solutions.