Medical Definition of Clinical trials Our Clinical Trials Main Article provides a comprehensive look at the who, what, when and how of Clinical Trials Clinical trials: Trials to evaluate the effectiveness and safety of medications or medical devices by monitoring their effects on large groups of people. Clinical research trials may be conducted by government health agencies such as NIH, researchers affiliated with a hospital or university medical program, independent researchers, or private industry.
1 Over the range microwaves require a minimum 66 mounting height from floor to top of the micro. 2  The 66 from the floor dimension will allow approximately 13-16 between the cooktop and the bottom front of the microwave.
1 A given atom will absorb and emit the SAME frequencies of electromagnetic (E-M) radiation. 2  A gas of hydrogen atoms will produce an absorption line spectrum if it is between you (your telescope+spectrograph) and a continuum light source, and an emission line spectrum if viewed from a different angle. This is called an emission spectrum (just peaks, not continuous). 2  The E-M radiation frequencies absorbed and emitted match the allowed energy levels in the atom. 3  The allowed energy levels in an atom depend mostly on the electric field configuration.