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Page "Dendrite (metal)" ¶ 4
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Nucleation and growth
* Nucleation and growth of the film on the substrate surface

Nucleation and .
Nucleation of microtubules for structural roles and for generation of the mitotic spindle are not from a canonical centriole-like MTOC.
Fine emulsions of pure water have been cooled to − 38 degrees Celsius without nucleation to form ice .. Nucleation occurs due to fluctuations in the properties of the material.
Nucleation is the process of forming aerosol mass from the condensation of a gaseous precursor, specifically a vapour.
Nucleation is the step wherein the molecules start to gather into clusters, on the nanometer scale, arranging in a defined and periodic manner that defines the crystal structure.
The Electromagnetic Containerless Processing Facility ( TEMPUS ) is used for the Experiments on Nucleation in Different Flow Regimes, Thermophysical Properties of Advanced Materials in the Undercooled Liquid State Experiment, Measurements of the Surface Tension of Liquid and Undercooled Metallic Alloys by Oscillating Drop Technique Experiment, Alloy Undercooling Experiments, the Study of the Morphological Stability of Growing Dendrites by Comparative Dendrite Velocity Measuremetns on Pure Ni and Dilute Ni-C Alloy in the Earth and Space Laboratory Experiment, the Undercooled Melts of Alloys with Polytetrahedral Short-Range Order Experiment, the Thermal Expansion of Glass Forming Metallic Alloys in the Undercooled State Experiment, the AC Calorimetry and Thermophysical Properties of Bulk Glass-Forming Metallic Liquids experiment and the Measurement of Surface Tension and Viscosity of Undercooled Liquid Metals experiment.
Nucleation occurs at a relatively high temperature ( often just below the solubility limit ) so that the kinetic barrier of surface energy can be more easily overcome and the maximum number of precipitate particles can form.
Nucleation is the extremely localized budding of a distinct thermodynamic phase.
Nucleation of crystalline, amorphous and even vacancy clusters solid materials is also important, for example to the semiconductor industry.
Nucleation normally occurs at nucleation sites on surfaces contacting the liquid or vapor.
Nucleation without preferential nucleation sites is homogeneous nucleation.
Nucleation is involved in such processes as cloud seeding and in instruments such as the bubble chamber and the cloud chamber.
Nucleation of carbon dioxide bubbles around a finger.
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 in boiling can occur in the bulk liquid if the pressure is reduced so that the liquid becomes superheated with respect to the pressure-dependent boiling point.
* Nucleation is relevant in the process of crystallization of nanometer sized materials, and plays an important role in atmospheric processes.
* Nucleation is a key concept in polymer, alloy and ceramic systems.
Nucleation generally occurs with much more difficulty in the interior of a uniform substance, by a process called homogeneous nucleation.
Nucleation rate is dominated by diffusion.
Nucleation is a topic of wide interest in many scientific studies and technological processes.
 Abraham, Farid F. ( 1974 ) Homogeneous Nucleation Theory, New York: Academic Press
* N. H. Fletcher, Size Effect in Heterogeneous Nucleation, J. Chem. Phys. 29, 1958, 572.

growth and determine
These have to do with how much and by whom curriculum should be worked out from grade to grade, how much the child ’ s emerging interests should determine classroom activities, the importance of child-centered vs. societal – centered learning, the relationship of community building to individual growth, and especially the relationship between emotion, thought and experience.
* Managers may use fundamental analysis to determine future growth rates for buying high priced growth stocks.
The determined growth rates ( of income and cash ) and risk levels ( to determine the discount rate ) are used in various valuation models.
In cases where the geometric mean is being used to determine the average growth rate of some quantity, and the initial and final values and of that quantity are known, the product of the measured growth rate at every step need not be taken.
It uses techniques from chemical mineralogy, especially isotopic studies, to determine such things as growth forms in living plants and animals as well as things like the original mineral content of fossils.
By means of these scars one can determine the age of any young branch, since each year's growth ends in the formation of a bud, the formation of which produces an additional group of bud scale scars.
Bioassays are procedures that can determine the concentration of purity or biological activity of a substance such as vitamin, hormone, and plant growth factor.
A section through a coral, dyed to determine growth rate
Antioxidants are being studied to determine whether they can help prevent or delay age-related growth of cataracts, a clouding of the tissue of the lens of the eye.
A major purpose in constructing the world model has been to determine which, if any, of these behavior modes will be most characteristic of the world system as it reaches the limits to growth.
How to combine both these knowledge would determine further growth that leads to economic development of developing nations.
Monetary policy concerns the actions of a central bank or other regulatory authorities that determine the size and rate of growth of the money supply.
If we wish to determine the implied rate of growth ( if we are given the discount rate ), we may solve for g:
To determine the influence of macrophages in muscle growth, muscle cross-sectional area in macrophage-depleted muscle area was measured against two muscle sets: muscle that was injured and had macrophage presence and muscle that was not injured and had macrophage presence.
The trunk of a Joshua tree is made of thousands of small fibers and lacks annual growth rings, making it difficult to determine the tree's age.
In fact, cell membrane receptors bind to protein layer bioactive sites and these receptor-protein binding events are transduced, through the cell membrane, in a manner that stimulates specific intracellular processes that then determine cell adhesion, shape, growth and differentiation.
Actual knowledge about what creates growth is largely unproven ; however recent advances in econometrics and more accurate measurements in many countries is creating new knowledge by compensating for the effects of variables to determine probable causes out of merely correlational statistics.
Of note, Denison carried out experiments under the direction of Lt. Col. By to determine the strength, for construction purposes of the old growth timber in the vicinity of Bytown.
" Cradle to grave " is uppermost in the thoughts of TBL manufacturing businesses, which typically conduct a life cycle assessment of products to determine what the true environmental cost is from the growth and harvesting of raw materials to manufacture to distribution to eventual disposal by the end user.
Since lifestyle plays a large role in the growth and decay of bones, it is not possible in many cases to unequivocally determine bone age.
The calcification of the hamate bone is seen on X-rays during puberty and is sometimes used in orthodontics to determine if an adolescent patient is suitable for orthognathic intervention ( i. e. before or at their growth spurt ).
He rejected the Malthusian doctrine of population, maintaining that the only situation in which the means of subsistence will determine population growth is one in which a given society is not introducing new technologies or not adopting forward-thinking governmental policy.
Layered lamellar bone makes up most of the neural spine's cross-sectional area, and contains lines of arrested growth that can be used to determine the age of each individual at death.

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