Abbott

The sum of the squared differences between calculated and measures pressures is minimized as a function of model parameters. This method, often called Barker s method (Barker, 1953), ignores information contained in vapor-phase mole fraction measurements such information is normally only used for consistency tests, as discussed by Van Ness et al. (1973). Nevertheless, when high-quality experimental data are available. Barker s method often gives excellent results (Abbott and Van Ness, 1975). 

An apparent systematic error may be due to an erroneous value of one or both of the pure-component vapor pressures as discussed by several authors (Van Ness et al., 1973 Fabries and Renon, 1975 Abbott and Van Ness, 1977). In some cases, highly inaccurate estimates of binary parameters may occur. Fabries and Renon recommend that when no pure-component vapor-pressure data are given, or if the given values appear to be of doubtful validity, then the unknown vapor pressure should be included as one of the adjustable parameters. If, after making these corrections, the residuals again display a nonrandom pattern, then it is likely that there is systematic error present in the measurements. ... 

H. Modified Five-Suffix Marqules Equation (Abbott and Van Ness, 1975)... 

When the viscosities are not known, they can be estimated by the relations of Abbott et al. (1971) ... 

Kumar A, Biebuyck H A, Abbott N L and Whitesides G M 1992 The use of seif-assembied monoiayers and a seiective etch to generate patterned goid features J. Am. Chem. Soc. 114 9188-9... 

DISCO tool for deriving pharma-cophore from active Y. Martin at Abbott Labs available from... 

H. S. Corran, M Histo of Brewing, David and Charles, Newton Abbott Press, UK, 1975. 

Michael Williams MarkW. Holladay Abbott Laboratories... 

Clark A. Briggs MarkW. Holladay James F. Kerwm,Jr. James P. Sullivan Michael Williams Abbott Laboratories... 

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