Pyridinium Tribromide is used as a brominating agent for organic synthesis especially for pharmaceuticals and hormones. It can be replaced for n-Bromosuccinimide. (N-Bromo derivatives and ammonium tribromides are mainly used as brominating agents)
Top definition. Vlad. Vlad is usually a Russian name, sometimes romanian, and usually is an athletic all around great guy that is good at everything. He is known to have a big penis and is a legend in bed. He has an amazing body and really funny. He is very popular especially with females...fine females.
His filmography includes The Three Musketeers (2011), Sex & Drugs & Rock & Roll, and The Hobbit films. In Dracula Untold, Evans plays Vlad the Impaler, the fearsome warrior who earned his nickname by impaling his enemies, leaving them to anguish. The film connects the myth and history of Vlad the Impaler to the myth and canon of Dracula, showing his last days as a man and his first as a vampire.