First developed by the United States in the early 1950s, the hydrogen or thermonuclear bomb is perhaps a thousand times more powerful than a uranium-or plutonium-based fission bomb, making it effectively the nuclear weapon's nuclear weapon.n a fusion reaction, two atoms of the lightest element, hydrogen, fuse to create one atom of helium, the next-lightest element â and release much more energy.
Clival tumors were found to enhance intensely. A clivus of very low signal intensity (signal void) on T1- or T2-weighted images was always abnormal. The clivus with marrow reconversion was uniformly hypointense relative to the pons on T1-weighted images and isointense relative to normal marrow on T2-weighted images.
Purinergic signalling (or signaling: see American and British English differences) is a form of extracellular signalling mediated by purine nucleotides and nucleosides such as adenosine and ATP.It involves the activation of purinergic receptors in the cell and/or in nearby cells, thereby regulating cellular functions.utocrine purinergic signalling is an important checkpoint in the activation of white blood cells. These mechanisms either enhance or inhibit cell activation based on the purinergic receptors involved, allowing cells to adjust their functional responses initiated by extracellular environmental cues.