<?xml version='1.0' encoding='UTF-8'?><xml><records><record><source-app name="HighWire" version="7.x">Drupal-HighWire</source-app><ref-type name="Journal Article">17</ref-type><contributors><authors><author><style face="normal" font="default" size="100%">Negueruela, A. I.</style></author><author><style face="normal" font="default" size="100%">Echavarri, J. F.</style></author><author><style face="normal" font="default" size="100%">Arcos, M. L. Los</style></author><author><style face="normal" font="default" size="100%">de Castro, M. P. Lopez</style></author></authors><secondary-authors></secondary-authors></contributors><titles><title><style face="normal" font="default" size="100%">Study of Color of Quaternary Mixtures of Wines by Means of the Scheffé Design</style></title><secondary-title><style face="normal" font="default" size="100%">American Journal of Enology and Viticulture</style></secondary-title></titles><dates><year><style  face="normal" font="default" size="100%">1990</style></year><pub-dates><date><style  face="normal" font="default" size="100%">1990-01-01 00:00:00</style></date></pub-dates></dates><pages><style  face="normal" font="default" size="100%">232-240</style></pages><doi><style  face="normal" font="default" size="100%">10.5344/ajev.1990.41.3.232</style></doi><volume><style face="normal" font="default" size="100%">41</style></volume><issue><style face="normal" font="default" size="100%">3</style></issue><abstract><style  face="normal" font="default" size="100%">Standardization of the color of each non-vintage is an important duty, but color specification is difficult. In this article we investigate empirical models using Scheffé polynomials to describe color response surface for four Rioja wine mixtures. The accuracy of color response prediction is shown as color differences in CIELAB units. The color response surfaces are visualized by preparing contour plots that depict color variation over a compositional region.</style></abstract></record></records></xml>