Direct Measurement of Surface Residence Times:  Nitryl Chloride and Chlorine Nitrate on Alkali Halides at Room Temperature

1998 ◽  
Vol 102 (46) ◽  
pp. 9193-9201 ◽  
Author(s):  
Thomas G. Koch ◽  
Michel J. Rossi
Keyword(s):  
Direct Measurement ◽  
Room Temperature ◽  
Alkali Halides ◽  
Residence Times ◽  
Chlorine Nitrate ◽  
Nitryl Chloride

Broadening and shifting of the depolarized component of the Raman Q branch in D2 at room temperature

1995 ◽  
Vol 73 (7-8) ◽  
pp. 530-536 ◽  
Author(s):  
P. M. Sinclair ◽  
P. Duggan ◽  
J. R. Drummond ◽  
A. D. May
Keyword(s):  
Spectral Data ◽  
Direct Measurement ◽  
Room Temperature ◽  
Theoretical Calculations

We report the first direct measurement of the broadening and shifting of the depolarized component of the Raman Q branch in D2. Spectral data were recorded from 1.5 to 12 amagat at 305.2 K. Both the measured broadening and shifting of the depolarized component are significantly different from that for the polarized Q branch. These results can be used as a check of theoretical calculations when they become available. Here they are used to correct previously reported values of the broadening of the polarized part of the Q-branch spectrum. Measured values of the ratio of the depolarized to polarized intensity for the Q-branch lines are also given.

The thermal expansion of alkali halides at low temperatures

1965 ◽  
Vol 286 (1405) ◽  
pp. 204-217 ◽  
Keyword(s):  
Low Temperatures ◽  
Room Temperature ◽  
Alkali Halides ◽  
Theoretical Models ◽  
Liquid Oxygen ◽  
Rock Salt Structure ◽  
General Behaviour ◽  
A Value ◽  
Salt Structure ◽  
Expansion Coefficients

Linear thermal expansions of eight alkali halides have been determined at liquid oxygen temperatures and at temperatures from 30 °K down to 2 °K. For temperatures T ≤ θ/20, where θ is the Debye temperature, the expansion coefficients are well represented by α = AT 3 + BT 5 . Values are reported for the Grüneisen parameter γ = 3α V/Cx , where C/V is the heat capacity per unit volume and x is the compressibility. For CsBr (b.c.c. structure) γ appears to be nearly independent of temperature, with a value of 2·0 but for the other crystals, which have the rock-salt structure, the parameter γ varies with temperature, chiefly betw een θ/10 and θ/5. At room temperature, γ lies between 1·45 and 1·7 but at low temperature this generally decreases to a value γ 0 which is ca. —0·1 for RbI, +0·3 for KCl, KBr and KI and 1·0 for NaCl and Nal; LiF does not show this decrease, γ 0 being 1·7. The values observed for γ 0 are compared with those calculated from elastic constants and their pressure derivatives and the general behaviour of γ( T ) is observed to conform qualitatively to the predictions of simple theoretical models of Born, Blackman and Barron.

scholarly journals Direct Measurement of Osmotic Pressure of Glycosaminoglycan Solutions by Membrane Osmometry at Room Temperature

2005 ◽  
Vol 89 (3) ◽  
pp. 1543-1550 ◽  
Author(s):  
Nadeen O. Chahine ◽  
Faye H. Chen ◽  
Clark T. Hung ◽  
Gerard A. Ateshian
Keyword(s):  
Osmotic Pressure ◽  
Direct Measurement ◽  
Room Temperature

scholarly journals Direct Measurement of Room-Temperature Nondiffusive Thermal Transport Over Micron Distances in a Silicon Membrane

2013 ◽  
Vol 110 (2) ◽  
Author(s):  
Jeremy A. Johnson ◽  
A. A. Maznev ◽  
John Cuffe ◽  
Jeffrey K. Eliason ◽  
Austin J. Minnich ◽  
...  
Keyword(s):  
Direct Measurement ◽  
Thermal Transport ◽  
Room Temperature ◽  
Silicon Membrane
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