X dispersive

In a previously flame-dried 1-1. three-necked, round-bottomed flask equipped with a mechanical stirrer, dropping tube, and reflux condenser fitted with a calcium chloride tube are placed 20.5 g. (0.5 mole) of a 58.5 X, dispersion of sodium hydride in mineral oil (Metal Chemicals Division, Ventron Corporation) and 200 ml. of dimethyl sulfoxide. The mixture is stirred at 20- 25, with occasional ice-bath cooling, and a solution of 123.1 g. (0.5 mole) of diethyl benzylmalonate (Aldrich) is added dropwise. Stirring is continued at 20-25" for about 30 min. (until the evolution of hydrogen is complete), then a solution of 53.8 g. (0.5 mole) of 2-dimethylaminocthyl chloride is added dropwise. After the addition is completed the stirred mixture is gradually heated to 100°. After 30 min. the mixture is cooled and poured into I 1. of ice water. The mixture is extracted with three l50-ml. portions of ether and the combined ethereal solution is dried over magnesium sulfate and transferred to a 1-1. three-necked, round-bottomed flask equipped with a mechanical stirrer, dropping funnel, and air condenser, and then... 

FlG. 10.1. Dispersion relation for an organic microcavity with a 20 nm thick NTCDA active layer. The broken curves are the uncoupled cavity photon (P) and Frenkel exciton (X) dispersion relations as determined by the fitting parameters. Inset room temperature photoluminescence and absorbance spectra for a 50 nm thick film of NTCDA. Absorption peaks at 3.19 and 3.39 eV are designated as the 0-0 and 0-1 transitions. Reprinted with permission from Holmes et al. (12). Copyright 2004, American Physical Society. 

Dutta, D., Leighton, D. X, Dispersion reduction in pressure-driven flow through microetched channels. 

Alkali-affected silicate Solid or powder 230-1400 5-20 % solution X Dispersing the ores and increasing the quality and recovery, decreasing the foam viscous and depressing the flotation of silicon and silicate Increasing the quality of concentrates Improving the recovery... 

Fig. 11. The method to determine maximum resolution of a spectrometer under specific measurement conditions. In the example shown, bandpass = resolution = FWHM X dispersion = (2 nm/20 mm) x 5 mm = 0.50 nm resolution.

Bermocoll E 320 X dispersant, water emulsions Nansa EVM 62/H Nansa EVM 50/NS Nansa EVM 70/13 Soprophor TS/60 dispersant, water hardness Egasol 910... 

Scheme 1 The number of unreacted A s 1. The number of unreaeted B s (funetion-ality- 1) X dispersity + 1.

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