Nucleation
Nucleation Bubbles in a soft drink each nucleate ... independently, responding to a decrease in pressure. Nucleation is the onset of a phase transition ... released from a container of carbonated liquid. Nucleation often occurs more easily at a pre-existing interface (heterogeneous nucleation), as happens on boiling chips and string used to make rock candy. Nucleation generally occurs with much more difficulty ...
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Arp2/3 complex
... pre-existing filaments and using these as nucleation cores. However, the Arp2/3 complex stimulates actin polymerization by creating a new nucleation core. The nucleation core activity of Arp2/3 is activated ... the Arp2/3 complex to create a nucleation core. However, de novo nucleation followed by polymerization is not sufficient ...
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Recrystallization (metallurgical)
... and d s is the subgrain size. Nucleation Historically it was assumed that the nucleation rate of new recrystallised grains would be ... on these values found that the observed nucleation rate was greater than the calculated one ... the Fig 2. There is an initial 'nucleation period' t 0 while the nuclei form ... the process does not strictly follow classical nucleation theory it is often found that ...
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Polyaniline
... prevent aggregation based on a model for nucleation and aggregate formation. The model identifies two nucleation modes for particle formation, one by so-called homogeneous nucleation forming long elongated nanofibers and very stable ... that can last for months. The other nucleation mode is by heterogeneous nucleation taking place on any alien body ...
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Crystal growth
... a crystal. This happens in two stages: nucleation and growth. In the first stage, a ... containing the newly forming crystal is created. Nucleation occurs relatively slowly as the initial crystal ... adhere and form the crystal. After crystal nucleation, the second stage, growth, rapidly ensues. Crystal ... system, the crystal lattice, started in crystal nucleation. Nucleation can be either homogeneous, without the ...
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Rock microstructure
... microstructure is a combination of cooling rate, nucleation rate, eruption (if a lava), magma composition ... intrusive. aphanitic where cooling is rapid, crystal nucleation and growth is stunted, forming a uniform ... Structure Porphyritic structure is caused by the nucleation of crystal sites and the growth of ... supercooled magmas, particularly komatiite lavas. Here, low nucleation rates due to superfluidity prevent nucleation until the liquid is well below ...
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Zimm-Bragg model
... the ease of propogation with respect to nucleation. Helix-coil transition models Helix-coil transition ... is, whether the new site is a nucleation or propogation. By convention, a coil unit ... state ('H') to a previously coiled state (nucleation) is assigned a statistical weight $\backslash sigma\; ...\; math>,\; where$ \backslash sigma\; \backslash $is\; the$nucleation parameter and $s\; =\; \backslash frac\{[H]\}\{[C\; ...\; propogation\; of\; a\; helix\; more\; favorable\; than$nucleation of a helix from coil state. ...
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Talk:Cavitation
... added) I would expect that while a nucleation surface subtantially lowers the nucleation energy required to create a cavity, it ... impurities or local surfaces, if a higher nucleation energy is met. This seems analagous to the nucleation of crystals in a freezing liquid -- a ... at an impurity due to a lower nucleation energy, but absent that, crystals will ...
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Talk:Champagne (beverage)
... conditions). It will add sparkle by causing nucleation but its not exactly relevant. Factual dispute over type of nucleation source for the bubbles This regards the ... the bottom of the glass to provide nucleation sites for consistent bubble formation. Comparing an ... has been roughened by etching to provide nucleation sites. To insist that this statement requires ... up; because the salt crystals are providing nucleation sites. The same as if that ...
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Supercooling
... to the temperature at which crystal homogeneous nucleation occurs. The homogeneous nucleation can occur above the glass transition where ... ambient pressure down to its crystal homogeneous nucleation at almost 231 K (−42�C). 1 If ... 1 million K per second, the crystal nucleation can be avoided and water becomes a ... into the solution which then act as nucleation sites for the recrystallization of the ...
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