He teaches at the University of the Arts in Zurich. English Masque Dances. British Library contains the largest collection of dances from the early-seventeenth-century courtly masques to have survived, and it is thought that it was compiled by Sir Nicholas Le Strange of Hunstanton about 1624.
The USEPA recommends a limit of 0.02 ppm as NH3 in freshwater or marine environments. Total ammonia levels, at this limit, can range from 160 ppm at pH 6 and temperature of 5 degrees C to 0.06 ppm at pH 9 and temperature of 25 degrees C.he USEPA recommends a limit of 0.02 ppm as NH3 in freshwater or marine environments. Total ammonia levels, at this limit, can range from 160 ppm at pH 6 and temperature of 5 degrees C to 0.06 ppm at pH 9 and temperature of 25 degrees C.
Ammonia is toxic to aquatic life and toxicity is affected by pond pH. Ammonia-nitrogen (NH 3-N) has a more toxic form at high pH and a less toxic form at low pH, un-ionized ammonia (NH 3) and ionized ammonia (NH 4 +), respectively. In addition, ammonia toxicity increases as temperature rises.