<?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%">Fernandes, Emanuel M.</style></author><author><style face="normal" font="default" size="100%">Aroso, Ivo M.</style></author><author><style face="normal" font="default" size="100%">Mano, João F.</style></author><author><style face="normal" font="default" size="100%">Covas, José A.</style></author><author><style face="normal" font="default" size="100%">Reis, Rui L.</style></author></authors></contributors><titles><title><style face="normal" font="default" size="100%">Functionalized cork-polymer composites (CPC) by reactive extrusion using suberin and lignin from cork as coupling agents</style></title><secondary-title><style face="normal" font="default" size="100%">Composites Part B: Engineering</style></secondary-title></titles><keywords><keyword><style  face="normal" font="default" size="100%">Coupling agent</style></keyword><keyword><style  face="normal" font="default" size="100%">Electron microscopy</style></keyword><keyword><style  face="normal" font="default" size="100%">Extrusion</style></keyword><keyword><style  face="normal" font="default" size="100%">Fibre/matrix bond</style></keyword><keyword><style  face="normal" font="default" size="100%">Polymer-matrix composites (PMCs)</style></keyword></keywords><dates><year><style  face="normal" font="default" size="100%">2014</style></year><pub-dates><date><style  face="normal" font="default" size="100%">2014///</style></date></pub-dates></dates><urls><web-urls><url><style face="normal" font="default" size="100%">http://www.sciencedirect.com/science/article/pii/S1359836814003084</style></url></web-urls></urls><language><style face="normal" font="default" size="100%">eng</style></language><abstract><style face="normal" font="default" size="100%">High density polyethylene (HDPE) and cork powder were compounded in a co-rotating twin-screw extruder to obtain cork-polymer composites (CPC) with improved properties. Benzoyl peroxide (BPO) was used as initiator agent, and suberin or lignin isolated from cork enhanced filler-matrix bonding and promoted mechanical reinforcement with environmental benefits. The novel composites were characterized in terms of dimensional stability, evolution of morphology, thermal and mechanical properties and their performance was compared with that of composites containing polyethylene-grafted maleic anhydride (PE-g-MA) as coupling agent. As expected, composites with coupling agent present higher mechanical properties, lower water uptake and thickness swelling variation. Suberin acts as plasticizer with antioxidant benefits, while lignin works as a coupling agent, improving tensile modulus and maximum strength. Increasing lignin content does not improve the mechanical properties but improves thermal stability.</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%">Schmitt, Uwe</style></author><author><style face="normal" font="default" size="100%">Liese, Walter</style></author></authors></contributors><titles><title><style face="normal" font="default" size="100%">Response of xylem parenchyma by suberization in some hardwoods after mechanical injury</style></title><secondary-title><style face="normal" font="default" size="100%">Trees</style></secondary-title></titles><keywords><keyword><style  face="normal" font="default" size="100%">Electron microscopy</style></keyword><keyword><style  face="normal" font="default" size="100%">hardwoods</style></keyword><keyword><style  face="normal" font="default" size="100%">suberization</style></keyword><keyword><style  face="normal" font="default" size="100%">wound responses</style></keyword><keyword><style  face="normal" font="default" size="100%">xylem parenchyma</style></keyword></keywords><dates><year><style  face="normal" font="default" size="100%">1993</style></year></dates><volume><style face="normal" font="default" size="100%">8</style></volume><pages><style face="normal" font="default" size="100%">23-30</style></pages><language><style face="normal" font="default" size="100%">eng</style></language><abstract><style face="normal" font="default" size="100%">Wound responses of xylem parenchyma by suberizarion were investigated in some hardwoods by light and electron microscopy. Suberized ray and axial paren- chyma cells form a distinct boundary around the wound in all investigated species. Vessels and fibres within and close behind the suberized area appeared more or less occluded; vessels in Fagus, Quercus, and Populus contained suber- ized tyloses, those in Betula and Tilia contained amor- phous and fibrillar deposits. A common mechanism for suberin deposition in the parenchyma cells became evi- dent. Cisternae of the endoplasmic reticulum were ap- parently involved in suberization. Suberin compounds are extruded by cytoplasmic vesicles, which fused with the plasma membrane, in order to release their content. The suberin layer exhibited the typical lamellated structure; cytoplasmic continuity between suberized cells by plas- modesmata was maintained through the suberin layer. Fagus revealed the most intense suberized area as com- pared with the other species. Within the reaction zone of Fagus and Quercus, some individual ray and axial paren- chyma cells exhibited a subdivision into 2 or 3 compart- ments prior to suberization. Subdivision was achieved by the formation of a primary wall-like layer. Subsequently, the compartments became individually suberized. Wound- ing during winter did not induce suberization. Also, samples wounded and kept under water during the vegeta- tion period showed no response. The role of suberization in the effectivity of wound-associated compartmentalization is discussed.</style></abstract></record></records></xml>