<?xml version="1.0" encoding="UTF-8"?><xml><records><record><source-app name="Biblio" version="7.x">Drupal-Biblio</source-app><ref-type>17</ref-type><contributors><authors><author><style face="normal" font="default" size="100%">GOMES, CMCPS</style></author><author><style face="normal" font="default" size="100%">Fernandes, A C</style></author><author><style face="normal" font="default" size="100%">DEALMEIDA, B D</style></author></authors></contributors><titles><title><style face="normal" font="default" size="100%">THE SURFACE-TENSION OF CORK FROM CONTACT-ANGLE MEASUREMENTS</style></title><secondary-title><style face="normal" font="default" size="100%">JOURNAL OF COLLOID AND INTERFACE SCIENCE</style></secondary-title></titles><keywords><keyword><style  face="normal" font="default" size="100%">chemical complexity</style></keyword><keyword><style  face="normal" font="default" size="100%">geometric method</style></keyword><keyword><style  face="normal" font="default" size="100%">harmonic method</style></keyword><keyword><style  face="normal" font="default" size="100%">physical complexity</style></keyword></keywords><dates><year><style  face="normal" font="default" size="100%">1993</style></year></dates><publisher><style face="normal" font="default" size="100%">ACADEMIC PRESS INC ELSEVIER SCIENCE</style></publisher><pub-location><style face="normal" font="default" size="100%">525 B ST, STE 1900, SAN DIEGO, CA 92101-4495 USA</style></pub-location><volume><style face="normal" font="default" size="100%">156</style></volume><pages><style face="normal" font="default" size="100%">195-201</style></pages><language><style face="normal" font="default" size="100%">eng</style></language><abstract><style face="normal" font="default" size="100%">The surface tension of cork is evaluated from contact angle measurements in cork-water-air and cork-methylene iodide-air systems, using the geometric and the harmonic mean methods. The contact angles were studied as a function of time and, in each case, the extrapolated value for t = 0 was used in the calculations to obtain γs. In spite of the chemical and physical complexity of cork, it was possible to obtain an average value for its surface tension γs = 32 ± 3 dyne cm-1 and polarity γPS/γS= 0.25. These values were compared to others obtained for several natural products such as wood or cellulose derivatives.</style></abstract><notes><style face="normal" font="default" size="100%">APS</style></notes><research-notes><style face="normal" font="default" size="100%">APS</style></research-notes></record></records></xml>