There are three main types of volcano-composite or strato, shield and dome. Composite Volcanoes. Composite volcanoes, sometimes known as strato volcanoes, are steep sided cones formed from layers of ash and [lava] flows. The eruptions from these volcanoes may be a pyroclastic flow rather than a flow of lava.
A vagal episode or vasovagal response or vasovagal attack (also called neurocardiogenic syncope) is a malaise mediated by the vagus nerve. When it leads to fainting, also known as a syncope, it is called a vasovagal syncope, which is the most common type of fainting.
PUVA Therapy Overview. PUVA is an acronym for psoralen and ultraviolet A. PUVA refers to the interaction of long wavelength ultraviolet light (320-400 nm) with a pharmaceutical molecule of plant origin, psoralen, producing a type of photochemotherapy..PUVA is useful in treating a number of human diseases.UVA is an acronym for psoralen and ultraviolet A. PUVA refers to the interaction of long wavelength ultraviolet light (320-400 nm) with a pharmaceutical molecule of plant origin, psoralen, producing a type of photochemotherapy..