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.
In normal skeletal muscle, Cl â fluxes account for 70â80% of the resting membrane conductance. With defective Cl â channels and smaller Cl â influxes, smaller influxes of Na + are needed to reach threshold and trigger action potentials, and thus muscle excitability is enhanced (1) (Fig. 4).ifferent types of delayed rectifier K + channels are found in vertebrate nerves, the heart, and skeletal muscle, and they are encoded by different genes (9). Loss of function mutations (mutations that cause channels to conduct fewer ions) in voltage-gated K + channels prolong the duration of the action potential (2).