alpha

The crystal lattice of solid americium and its compounds contains intrinsic defects, which are induced by self-irradiation with alpha particles and accumulate with time ; this results in a drift of some material properties.

The English word alphabet came into Middle English from the Late Latin word alphabetum, which in turn originated in the Greek ἀλφάβητος ( alphabētos ), from alpha and beta, the first two letters of the Greek alphabet.

Alpha decay is a type of radioactive decay in which an atomic nucleus emits an alpha particle ( two protons and two neutrons ) and thereby transforms ( or ' decays ') into an atom with a mass number 4 less and atomic number 2 less.

Visual representation of alpha decay

In the polytonic orthography of Greek, alpha, like other vowel letters, can occur with several diacritic marks: any of three accent symbols (), and either of two breathing marks (), as well as combinations of these.

This image's alpha channel falls off to zero at its base.

A representation of the 3D structure of the protein myoglobin showing turquoise alpha helix | alpha helices.

Another opposite breeding system to this is polygyny in which one male mates with many females ( e. g., lions, deer, some primates, and many systems where there is an alpha male ).

The total energy of the recoil nucleus is readily calculable, and is roughly the weight of the alpha ( 4 u ) divided by the weight of the parent ( typically about 200 u ) times the total energy of the alpha.

The word " alphabet " in English has a source in Greek language in which the first two letters were " A " ( alpha ) and " B " ( beta ), hence " alphabeta ".

The β sheet ( also β-pleated sheet ) is the second form of regular secondary structure in proteins, only somewhat less common than the alpha helix.

The proportionality operator "∝" ( in Unicode: U + 221D ) is sometimes mistaken for alpha.

Binding exposes its active site, allowing it to permanently ribosylate the Gs alpha subunit of the heterotrimeric G protein.

Stage N1 refers to the transition of the brain from alpha waves having a frequency of 8 – 13 Hz ( common in the awake state ) to theta waves having a frequency of 4 – 7 Hz.

The letter alpha represents various concepts in physics and chemistry, including alpha radiation, angular acceleration, alpha particles, alpha carbon and strength of electromagnetic interaction ( as Fine-structure constant ).

Geiger detectors are still used as a general purpose alpha / beta portable Radioactive contamination measurement and detection instrument, owing to their relatively low cost, their robustness and their relatively high detection efficiency ; particularly with high energy beta particles.

One example of protease inhibitors is the serpin superfamily, which includes alpha 1-antitrypsin, C1-inhibitor, antithrombin, alpha 1-antichymotrypsin, plasminogen activator inhibitor-1, and neuroserpin.

Premultiplied alpha has some practical advantages over normal alpha blending because premultiplied alpha blending is associative and linear interpolation gives better results, although premultiplication can cause a loss of precision and, in extreme cases, a noticeable loss of quality.

In English the noun alpha is used as a synonym for " beginning ", or " first " ( in a series ), reflecting its Greek roots.

The letter alpha represents various concepts in physics and chemistry, including alpha radiation, angular acceleration, alpha particles, alpha carbon and strength of electromagnetic interaction ( as Fine-structure constant ).

The radioisotopes typically decay into other elements upon radiating an alpha or beta particle.

At IBC in Amsterdam in September, an updated Linux demo was presented, and it was announced that the initial alpha version for Linux would become available on October 30.

An operator ( op ) is a node within a GEGL graph responsible for one action ; ops can be simple, such as " add " ( taking two inputs ) or " premultiply by alpha " ( taking one input ), or more complex, such as colorspace conversions.

Glucagon, secreted by the alpha cells of the pancreas, encourages cells to break down stored glycogen or convert non-carbohydrate carbon sources to glucose via gluconeogenesis, thus preventing hypoglycemia.

Mercaptans can be produced by photochemical addition of hydrogen sulfide ( H < sub > 2 </ sub > S ) to alpha olefins.