Determining exactly how long Ultram is detectable in the body depends on many variables, including which kind drug test is being used. Ultram - also known as Tramadol, Ultram, Ultracet, Tram cars - can be detected for a shorter time with some tests, but can be visible for up to three months in other tests.
Definition of professor for Students. : a teacher especially of the highest rank at a college or university.
The answer depends a lot on what country and what institution you're referring to. So there's no single answer. In the US, an instructor (also sometimes called a lecturer) is someone, often without a PhD, whose only job is to teach (part-time or full-time).