Volcano of classifying magmatic volcanoes is by their frequency of eruption, with those that erupt regularly called active, those that have erupted in historical times but are now quiet called dormant or inactive, and those that have not erupted in historical times called extinct. However, these popular classifications—extinct in particular—are practically meaningless to scientists. They use classifications which refer to a particular volcano's formative and eruptive processes and resulting shapes. There is no consensus among volcanologists on how to define an "active" volcano. The lifespan of a volcano can vary from months to several million years, making such a distinction sometimes
Dormant therapy not because the patent for the drug has expired or will expire prior to the completion of research and the federal approval process. Weak or no patent protection is a disincentive for drug development as it hinders a manufacturer’s ability to recoup the investment in expensive clinical trials. This disincentive is even more pronounced for treatments for more complex conditions such as Alzheimer’s, which require more clinical data than conditions which currently have existing treatments. Dormant therapy The term “dormant therapy” refers to a new drug or a new biological product which was made the subject of a request for