secondary ion mass spectrum
51rare-earth element — /rair errth /, Chem. any of a group of closely related metallic elements, comprising the lanthanides, scandium, and yttrium, that are chemically similar by virtue of having the same number of valence electrons. Also called rare earth metal. [1955 …
52Magnetosphere of Jupiter — Discovery[1] Discovered by …
53Epilepsy — Epileptic redirects here. For the graphic novel, see Epileptic (graphic novel). Epilepsia redirects here. For the journal, see Epilepsia (journal). Epilepsy Classification and external resources Generalized 3 Hz spike and wave discharges in EEG …
54photochemical reaction — Chemical reaction initiated by absorption of energy in the form of visible (light), ultraviolet, or infrared radiation. Primary photochemical processes occur as an immediate result, and secondary processes may follow. The most important example… …
55plasma — plasmatic /plaz mat ik/, plasmic, adj. /plaz meuh/, n. 1. Anat., Physiol. the liquid part of blood or lymph, as distinguished from the suspended elements. 2. Cell Biol. cytoplasm. 3. whey. 4. a green, faintly translucent chalcedony. 5. Physics. a …
56Atomic clock — Nuclear clock redirects here. For the clock as a measure for risk of catastrophic destruction, see Doomsday Clock. For a clock updated by radio signals (commonly but inaccurately called an atomic clock ), see Radio clock. For the album by Zion I …
57COROT — Model of the Corot satellite General information NSSDC ID 2006 063A Organization …
58Space Solar Power Exploratory Research and Technology program — The Space Solar Power Exploratory Research and Technology program (SERT) program conducted by NASA, was initiated by John Mankins and lead by Joe Howell in March 1999 for the following purpose:* Perform design studies of selected flight… …
59geomagnetic field — Magnetic field associated with the Earth. It is essentially dipolar (i.e., it has two poles, the northern and southern magnetic poles) on the Earth s surface. Away from the surface, the field becomes distorted. Most geomagnetists explain the… …
60Natural phenol — Quercetin, a typical flavonoid, is a natural phenol Natural phenols, bioavailable phenols, plant phenolics, low molecular weight phenols or phenoloids[1][2] …
