1 Aussies are known for their excellent herding ability, intelligence, and high energy â and theyâre also one of the larger dogs on this list. 2  Average lifespan: 15 years. 3  Shih Tzu. 4  These âlionsâ were sweethearts of the Chinese Ming Dynasty, and today they live long lives as companion animals throughout the world.
Methylamine is used to produce a variety of important chemical products: pharmaceuticals; pesticides; fuel additives; explosives; solvents and cleaning agents; photographic precessing chemicals; and chemicals for the tanning of leather and dye processes.
Methylphenidate and amphetamines both have abuse potential. In treating children with attention-deficit hyperactivity disorder (ADHD), methylphenidate produces a calming effect. This results in a reduction in hyperactivity and an improvement in attention span. Methylphenidate also is used to treat excessive sleepiness.