<?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%">Belhoucine, Latifa</style></author><author><style face="normal" font="default" size="100%">Bouhraoua, Rachid T</style></author><author><style face="normal" font="default" size="100%">Prats, Eva</style></author><author><style face="normal" font="default" size="100%">Pulade-Villar, Juli</style></author></authors></contributors><titles><title><style face="normal" font="default" size="100%">Fine structure and functional comments of mouthparts in Platypus cylindrus (Col., Curculionidae: Platypodinae)</style></title><secondary-title><style face="normal" font="default" size="100%">Micron</style></secondary-title></titles><keywords><keyword><style  face="normal" font="default" size="100%">Ambrosia beetle</style></keyword><keyword><style  face="normal" font="default" size="100%">Fine structure</style></keyword><keyword><style  face="normal" font="default" size="100%">Mouthpart</style></keyword><keyword><style  face="normal" font="default" size="100%">Platypus cylindrus</style></keyword></keywords><dates><year><style  face="normal" font="default" size="100%">2013</style></year></dates><volume><style face="normal" font="default" size="100%">45</style></volume><pages><style face="normal" font="default" size="100%">74-82</style></pages><language><style face="normal" font="default" size="100%">eng</style></language><abstract><style face="normal" font="default" size="100%">Oak pinhole borer, Platypus cylindrus is seen in recent years as one of the biggest enemies directly involved in the observed decline of cork oak in Mediterranean forests with all the economic implications. As an ambrosia beetle, it has developed its effective drilling mouthpart enough to make tunnels in hardwood of the tree. The fine structural aspects of the mouthpart using the field emission scanning electron microscopy are analyzed about 23 adults collected in galleries of infested cork oak trees (Quercus suber) in a littoral forest of northwest Algeria. These adults are preserved in alcohol 70%, cleaned and coated with gold. The mouthparts of this beetle consist commonly of a labrum, a pair of mandibles, a pair of maxillae and the labium but with adapted structure to excavate galleries in the hardwood. In this role is also involved the first pair of legs. The function that present the different structures related to the construction of the tunnels is discussed. Both of maxillary and labial palpi direct the food to the mouth and hold it while the mandibles chew the food. The distal ends of these palpi are flattened and have shovel-like setae. Females have larger maxillary palpi than males and this is related to the particular biology of each sex.</style></abstract></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%">PARAMESWARAN, N</style></author><author><style face="normal" font="default" size="100%">LIESE, W</style></author><author><style face="normal" font="default" size="100%">GUNZERODT, H</style></author></authors></contributors><titles><title><style face="normal" font="default" size="100%">CHARACTERIZATION OF WETCORK IN QUERCUS-SUBER L</style></title><secondary-title><style face="normal" font="default" size="100%">HOLZFORSCHUNG</style></secondary-title></titles><keywords><keyword><style  face="normal" font="default" size="100%">chemical constitutions</style></keyword><keyword><style  face="normal" font="default" size="100%">Fine structure</style></keyword><keyword><style  face="normal" font="default" size="100%">Moisture content</style></keyword><keyword><style  face="normal" font="default" size="100%">Quercus suber</style></keyword><keyword><style  face="normal" font="default" size="100%">shrinkage</style></keyword><keyword><style  face="normal" font="default" size="100%">utilization</style></keyword><keyword><style  face="normal" font="default" size="100%">wetcork</style></keyword></keywords><dates><year><style  face="normal" font="default" size="100%">1981</style></year></dates><publisher><style face="normal" font="default" size="100%">WALTER DE GRUYTER &amp; CO</style></publisher><pub-location><style face="normal" font="default" size="100%">GENTHINER STRASSE 13, D-10785 BERLIN, GERMANY</style></pub-location><volume><style face="normal" font="default" size="100%">35</style></volume><pages><style face="normal" font="default" size="100%">195-199</style></pages><language><style face="normal" font="default" size="100%">eng</style></language><abstract><style face="normal" font="default" size="100%">The wetcork containing more than 400% moisture is developed as islets in the otherwise dry cork tissue of Quercus suber. A characterization using electron moscroscopy yielded no marked differences in the wall structure, except for formation of gaps due to lack of substances in the middle lamella of some wetcork cells. The chemical constitution of the two tissues types equally showed no obvious differences. During drying the wetcork shrinks to a great extent, thus influencing the utilization of such a cork in certain fields of application.</style></abstract></record></records></xml>