Analysis of water–ethanol nucleation rate data with two component nucleation theorems

2000 ◽  
Vol 113 (8) ◽  
pp. 3261-3269 ◽  
Author(s):  
Hanna Vehkamäki ◽  
Ian J. Ford
Keyword(s):  
Nucleation Rate ◽  
Rate Data ◽  
Two Component

Energetics of smalln-pentanol clusters from droplet nucleation rate data

2000 ◽  
Vol 112 (12) ◽  
pp. 5393-5398 ◽  
Author(s):  
Michael Knott ◽  
Hanna Vehkamäki ◽  
Ian J. Ford
Keyword(s):  
Nucleation Rate ◽  
Rate Data ◽  
Droplet Nucleation

Displacement barrier heights from experimental nucleation rate data

2008 ◽  
Vol 90 (2-4) ◽  
pp. 303-312 ◽  
Author(s):  
Jussi Malila ◽  
Antti-Pekka Hyvärinen ◽  
Yrjö Viisanen ◽  
Ari Laaksonen
Keyword(s):  
Nucleation Rate ◽  
Rate Data ◽  
Barrier Heights

Nucleation rates of droplets in supersaturated steam and water vapour–carrier gas mixtures between 200 and 450 K

2018 ◽  
Vol 232 (5) ◽  
pp. 536-549 ◽  
Author(s):  
Jan Hrubý ◽  
Michal Duška ◽  
Tomáš Němec ◽  
Michal Kolovratník
Keyword(s):  
Water Vapour ◽  
Nucleation Rate ◽  
Molecular Simulations ◽  
Temperature Trend ◽  
Nucleation Theory ◽  
Energy Conditions ◽  
Optical Data ◽  
Classical Nucleation Theory ◽  
Rate Data ◽  
Carrier Gases

We compare experimental nucleation rates for water vapour in various carrier gases, estimated nucleation rates for steam, and nucleation rates obtained from molecular simulations. The data for steam are deduced from empirical adjustments of the classical nucleation theory developed by various authors to reproduce pressure and optical data for condensing steam flows in converging-diverging nozzles and turbine stages. By combining the data for nucleation in carrier gases and the data for steam nucleation, an unprecedented temperature range of 250 K is available to study the temperature dependence of nucleation rate. Original results of molecular dynamic simulations for TIP4P/2005 force field in the NVE (system constrained by number of particles, volume and energy) conditions are provided. Correction of classical nucleation theory for non-isothermal nucleation conditions is applied to experimental and simulated data. The nucleation rate data for steam follow a similar temperature trend as the nucleation rate data for water vapour in carrier gases at lower temperatures. The ratio of observed nucleation rates to classical nucleation theory predictions decreases more steeply with temperature than the empirical correlation by Wölk et al. ( J Chem Phys 2002; 117: 4954–4960). On the contrary to experimental data, the ratios of nucleation rates computed from molecular simulations to classical nucleation theory predictions do not show a significant temperature trend.

A Computational Method for Extracting Crystallization Growth and Nucleation Rate Data from Hot Stage Microscope Images

2009 ◽  
Vol 9 (12) ◽  
pp. 5061-5068 ◽  
Author(s):  
Andrew G. F. Stapley ◽  
Chrismono Himawan ◽  
William MacNaughtan ◽  
Timothy J. Foster
Keyword(s):  
Nucleation Rate ◽  
Computational Method ◽  
Rate Data ◽  
Microscope Images

Spectroscopic Observations of Visual Double Stars

1965 ◽  
Vol 5 ◽  
pp. 109-111
Author(s):  
Frederick R. West
Keyword(s):  
Radial Velocity ◽  
High Dispersion ◽  
Velocity Difference ◽  
Spectrograph Slit ◽  
Spectroscopic Observations ◽  
Double Stars ◽  
Visual Double Stars ◽  
Relative Orbit ◽  
Two Component ◽  
Star Images

There are certain visual double stars which, when close to a node of their relative orbit, should have enough radial velocity difference (10-20 km/s) that the spectra of the two component stars will appear resolved on high-dispersion spectrograms (5 Å/mm or less) obtainable by use of modern coudé and solar spectrographs on bright stars. Both star images are then recorded simultaneously on the spectrograph slit, so that two stellar components will appear on each spectrogram.

A technique for protecting delicate specimens during processing

1989 ◽  
Vol 47 ◽  
pp. 982-983
Author(s):  
R.J. Mount ◽  
R.V. Harrison
Keyword(s):  
Basilar Membrane ◽  
Low Cost ◽  
Organ Of Corti ◽  
Region Of Interest ◽  
Sensory Epithelium ◽  
Physical Damage ◽  
Air Drying ◽  
Specimen Handling ◽  
Two Component

The sensory end organ of the ear, the organ of Corti, rests on a thin basilar membrane which lies between the bone of the central modiolus and the bony wall of the cochlea. In vivo, the organ of Corti is protected by the bony wall which totally surrounds it. In order to examine the sensory epithelium by scanning electron microscopy it is necessary to dissect away the protective bone and expose the region of interest (Fig. 1). This leaves the fragile organ of Corti susceptible to physical damage during subsequent handling. In our laboratory cochlear specimens, after dissection, are routinely prepared by the O-T- O-T-O technique, critical point dried and then lightly sputter coated with gold. This processing involves considerable specimen handling including several hours on a rotator during which the organ of Corti is at risk of being physically damaged. The following procedure uses low cost, readily available materials to hold the specimen during processing ,preventing physical damage while allowing an unhindered exchange of fluids.Following fixation, the cochlea is dehydrated to 70% ethanol then dissected under ethanol to prevent air drying. The holder is prepared by punching a hole in the flexible snap cap of a Wheaton vial with a paper hole punch. A small amount of two component epoxy putty is well mixed then pushed through the hole in the cap. The putty on the inner cap is formed into a “cup” to hold the specimen (Fig. 2), the putty on the outside is smoothed into a “button” to give good attachment even when the cap is flexed during handling (Fig. 3). The cap is submerged in the 70% ethanol, the bone at the base of the cochlea is seated into the cup and the sides of the cup squeezed with forceps to grip it (Fig.4). Several types of epoxy putty have been tried, most are either soluble in ethanol to some degree or do not set in ethanol. The only putty we find successful is “DUROtm MASTERMENDtm Epoxy Extra Strength Ribbon” (Loctite Corp., Cleveland, Ohio), this is a blue and yellow ribbon which is kneaded to form a green putty, it is available at many hardware stores.

Fifth virial coefficient of a two-component mixture of hard discs

1997 ◽  
Vol 90 (4) ◽  
pp. 679-681
Author(s):  
F. SAIJA ◽  
G. FIUMARA ◽  
P.V. GIAQUINTA
Keyword(s):  
Virial Coefficient ◽  
Component Mixture ◽  
Two Component
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