Aspirin is a salicylate (sa-LIS-il-ate). It works by reducing substances in the body that cause pain, fever, and inflammation. Aspirin is used to treat pain, and reduce fever or inflammation. It is sometimes used to treat or prevent heart attacks, strokes, and chest pain (angina). Aspirin should be used for cardiovascular conditions only under the supervision of a doctor.
Nitrogen Grade Standards. Nitrogen is used across many industries for different purposes. Although certain names of grades are very common, the actual grades of nitrogen are not standardized across industries or even within industries. Ultimately, the manufacturer of the nitrogen chooses the name of the grade to categorize the nitrogen. For this reason, it is possible to have two nitrogen products with the same purity specifications, but listed in grades with different names. It is also possible for two nitrogen products within the same grade to have different purity specifications. It is important to select a nitrogen product based on its purity specifications and not solely its grade.
What is Ammonia? Ammonia is a nutrient that contains nitrogen and hydrogen. Its chemical formula is NH 3 in the un-ionized state and NH 4 + in the ionized form. Total ammonia is the sum of both NH 3 and NH 4 + . Total ammonia is what is measured analytically in water. Why is it Important? Ammonia is the preferred nitrogen-containing nutrient for plant growth. Ammonia can be converted to nitrite (NO 2 ) and nitrate (NO 3) by bacteria, and then used by plants. Nitrate and ammonia are the most common forms of nitrogen in aquatic systems.