<?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%">Rocha, S</style></author><author><style face="normal" font="default" size="100%">Delgadillo, I</style></author><author><style face="normal" font="default" size="100%">Ferrer Correia, A J</style></author><author><style face="normal" font="default" size="100%">Barros, A</style></author><author><style face="normal" font="default" size="100%">Wells, P</style></author></authors></contributors><titles><title><style face="normal" font="default" size="100%">Application of an Electronic Aroma Sensing System to Cork Stopper Quality Control</style></title><secondary-title><style face="normal" font="default" size="100%">Journal of Agricultural and Food Chemistry</style></secondary-title></titles><keywords><keyword><style  face="normal" font="default" size="100%">Cork stoppers</style></keyword><keyword><style  face="normal" font="default" size="100%">electronic aroma sensing system</style></keyword><keyword><style  face="normal" font="default" size="100%">off-flavors</style></keyword><keyword><style  face="normal" font="default" size="100%">quality control</style></keyword><keyword><style  face="normal" font="default" size="100%">“standard” aroma</style></keyword></keywords><dates><year><style  face="normal" font="default" size="100%">1998</style></year></dates><publisher><style face="normal" font="default" size="100%">American Chemical Society</style></publisher><volume><style face="normal" font="default" size="100%">46</style></volume><pages><style face="normal" font="default" size="100%">145-151</style></pages><language><style face="normal" font="default" size="100%">eng</style></language><abstract><style face="normal" font="default" size="100%">Cork odors were characterized using an electronic aroma sensing system. The electronic system is a compact, benchtop instrument comprising a sensor array, signal processing hardware, a measurement algorithm, and a pattern classification system. The sensor array responds to the presence of aroma volatile compounds by changes in their electrical properties. Resistance changes are displayed as a histogram, which is a fingerprint of the aroma being analyzed. Five different cork odors were studied: NE, which is considered as standard cork odor; CO, exhibiting the pleasant boiled cork odor (it is also considered as a good odor); PO, corresponding to rotten odor; and B and BO, representing moldy and very intensely moldy odors, respectively. This electronic aroma sensing system could discriminate quickly and objectively between acceptable odor and the unacceptable taint. Characterization and selection of a subset of sensors were performed. A relation between sensors and specific odors was established. The system, once trained with representative acceptable and unacceptable samples, could be used as a simple quality control tool and incorporated into the normal quality control procedures for each batch of product, by providing real-time analysis of a sample overall aroma.</style></abstract><notes><style face="normal" font="default" size="100%">doi: 10.1021/jf970259+</style></notes><research-notes><style face="normal" font="default" size="100%">doi: 10.1021/jf970259+</style></research-notes></record><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%">Rocha, Sílvia</style></author><author><style face="normal" font="default" size="100%">Delgadillo, Ivonne</style></author><author><style face="normal" font="default" size="100%">Ferrer Correia, A J</style></author></authors></contributors><titles><title><style face="normal" font="default" size="100%">GC−MS Study of Volatiles of Normal and Microbiologically Attacked Cork from Quercus suber L.</style></title><secondary-title><style face="normal" font="default" size="100%">Journal of Agricultural and Food Chemistry</style></secondary-title></titles><keywords><keyword><style  face="normal" font="default" size="100%">Armillaria mellea</style></keyword><keyword><style  face="normal" font="default" size="100%">molds</style></keyword><keyword><style  face="normal" font="default" size="100%">musty and moldy odors</style></keyword><keyword><style  face="normal" font="default" size="100%">volatile components</style></keyword><keyword><style  face="normal" font="default" size="100%">“Normal” cork</style></keyword></keywords><dates><year><style  face="normal" font="default" size="100%">1996</style></year></dates><publisher><style face="normal" font="default" size="100%">American Chemical Society</style></publisher><volume><style face="normal" font="default" size="100%">44</style></volume><pages><style face="normal" font="default" size="100%">865-871</style></pages><language><style face="normal" font="default" size="100%">eng</style></language><abstract><style face="normal" font="default" size="100%">The volatile compounds of cork were studied by gas chromatography and combined gas chromatography?high-resolution mass spectrometry using simultaneous distillation?extraction to prepare the samples. To assess the origin of the volatiles, three different types of samples were analyzed:? ?normal?, attacked by Armillaria mellea, and infested by molds. The study of the volatiles of these different types of corks allowed the identification of the chemical modifications which may occur in cork polymers. The cork attacked by A. mellea showed higher amounts of phenols, vanillin, benzaldehyde, benzyl alcohol, and chlorinated compounds than normal cork; this may indicate lignin degradation. The cork infested by molds contained higher levels of 3-methyl-1-butanol, 1-octen-3-ol, 1-octanol, 2-methylisoborneol, chlorinated compounds, and methyl ketones. These components resulting from microbial metabolism were also present in cork attacked by A. mellea. The use of cork attacked by A. mellea is not recommended in the manufacture of cork stoppers, since these types of cork have volatile compounds likely to cause off-flavors in wine. For the same reason it is important to reduce the likelihood of mold development during the standing period. Keywords: ?Normal? cork; Armillaria mellea; molds; volatile components; musty and moldy odors</style></abstract><notes><style face="normal" font="default" size="100%">doi: 10.1021/jf9500400</style></notes><research-notes><style face="normal" font="default" size="100%">doi: 10.1021/jf9500400</style></research-notes></record><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%">Rocha, Sílvia</style></author><author><style face="normal" font="default" size="100%">Delgadillo, Ivonne</style></author><author><style face="normal" font="default" size="100%">Ferrer Correia, A J</style></author></authors></contributors><titles><title><style face="normal" font="default" size="100%">Improvement of the Volatile Components of Cork from Quercus suber L. by an Autoclaving Procedure</style></title><secondary-title><style face="normal" font="default" size="100%">Journal of Agricultural and Food Chemistry</style></secondary-title></titles><keywords><keyword><style  face="normal" font="default" size="100%">autoclaving process</style></keyword><keyword><style  face="normal" font="default" size="100%">condensed steam</style></keyword><keyword><style  face="normal" font="default" size="100%">musty and moldy odors</style></keyword><keyword><style  face="normal" font="default" size="100%">Quercus suber L.</style></keyword><keyword><style  face="normal" font="default" size="100%">volatiles</style></keyword></keywords><dates><year><style  face="normal" font="default" size="100%">1996</style></year></dates><publisher><style face="normal" font="default" size="100%">American Chemical Society</style></publisher><volume><style face="normal" font="default" size="100%">44</style></volume><pages><style face="normal" font="default" size="100%">872-876</style></pages><language><style face="normal" font="default" size="100%">eng</style></language><abstract><style face="normal" font="default" size="100%">The volatiles of cork slabs submitted to a novel industrial treatment, autoclaving, were compared with the volatiles of the untreated slabs to establish the usefulness of this treatment as a cleanup procedure. The condensed steams corresponding to the first and a second autoclaving process were also analyzed. The volatile compounds of cork and of autoclaved condensed steam were extracted by simultaneous distillation?extraction and analyzed by gas chromatography and combined gas chromatography?high-resolution mass spectrometry. Cork slabs treated with steam under pressure showed smaller amounts of the volatile components with musty, moldy, and related odors, such as 3-methyl-1-butanol, 1-octanol, and guaiacol and other mold metabolites. The condensed steam contained compounds corresponding to those extracted from the cork. The autoclaving process has potential for industrial use to clean the cork and to reduce volatiles of microbial origin in cork samples. Keywords: Quercus suber L.; volatiles; autoclaving process; condensed steam; musty and moldy odors</style></abstract><notes><style face="normal" font="default" size="100%">doi: 10.1021/jf950041s</style></notes><research-notes><style face="normal" font="default" size="100%">doi: 10.1021/jf950041s</style></research-notes></record></records></xml>