During efflux of a polymer-gas solution from the extruder, supercritical bubbles are formed inside the die and their growth mainly takes place in the atmosphere, where the nucleation
of bubbles still continues.
The temperature at which a vial freezes (ice nucleation
temperature) is critical in the process to optimize production times and improve the quality of the final product.
Effect of surface-active substances on nucleation
speed and the stability of resulting nano-particles are focused subjects in nanotechnology.
For the development of mathematical models, nucleation
and growth or birth and growth may be considered to be operational concepts.
4]) which showed ice nucleation
activity from Poh-pohan.
in Freeze-Drying: Effects on Pore Size in the Dried Product Layer, Mass Transfer Resistance and Primary Drying Rates," J.
According to Wim Van de Velde, global marketing manager, Polyethylene Nucleation
, Milliken Chemical: "Building on our global leadership in nucleation
agents for polypropylene, Milliken is now also focused on polyethylene to meet a longstanding need for processing and performance enhancements.
In addition, the scientists used a refrigerated water-ethylene glycol bath to confirm ice nucleation
Therefore, scientists need to predict the nucleation
rate based on knowledge of the composition of the critical nucleus, Zhang explains.
Now, to quantify the phenomenon of metastability, a nucleation
theory based on statistical mechanics was developed by Volmer and Weber (1926), Becker and Doring (1935), Zeldovich (1943), Kagan (1960), Blander and Katz (1973).
The company has designed the glass with bike-shaped etchings on the bottom of the interior, intended to create bubbly nucleation
when beer is poured into it, resulting in a more dramatic rolling carbonation throughout the beer.
To quantify these flows the partial nucleate boiling on single nucleation
site has been investigated experimentally using PIV technique.
Additional capabilities include color dosing, air nucleation
, and C[O.
Tokyo, Japan, June 2, 2006 - (JCN Newswire) - The National Institute of Advanced Industrial Science and Technology (AIST; Hiroyuki Yoshikawa, President) and Tohoku University (Takashi Yoshimoto, President) have theoretically and experimentally analyzed the crystal nucleation
process and the subsequent crystal growth process in the colloidal synthesis of CdSe quantum dots, and succeeded in clarification of the relationship among crystal size, crystal structure, and optical absorption spectra in the primary process of the crystal growth.
Some of the papers presented covered such topics as: thermochemistry of nodulization and inoculation of irons; nucleation
mechanisms in ductile iron; a new approach to graphite nucleation
mechanism in gray irons; and a study of hold time and fade effects on microstructure in ductile iron.