DRUG DESCRIPTION. ALPHAGANÂ® P (brimonidine tartrate ophthalmic solution) 0.1% or 0.15%, sterile, is a relatively selective alpha-2 adrenergic receptor agonist (topical intraocular pressure lowering agent).The structural formula of brimonidine tartrate is: 5-bromo-6-(2-imidazolidinylideneamino) quinoxaline L-tartrate; MW= 442.24.In solution, ALPHAGANÂ® P (brimonidine tartrate ophthalmic solution) has a clear, greenish-yellow color.rimonidine tartrate appears as an off-white to pale-yellow powder and is soluble in both water (0.6 mg/mL) and in the product vehicle (1.4 mg/mL) at pH 7.7.
Siren (noun). a sea nymph (part woman and part bird) supposed to lure sailors to destruction on the rocks where the nymphs lived. Odysseus ordered his crew to plug their ears so they would not hear the Siren's fatal song. enchantress, temptress, siren, Delilah, femme fatale (noun).
What does this mean on the road? Sound outdoors falls off in level at 6dB per doubling of distance. The sound at the siren source has a maximum safe level that is largely set by the hearing protection requirements. Let's look at a general example. Assume the siren level at 10' in front of the vehicle is 100dBA. at 20' it will be 94dBA