The main characteristics of the cellular structure of cork from Quercus suber L. are reviewed and complt;mented with new observations of virgin and reproduction cork by scanning electron microscopy. Particular emphasis is given to cell geometry and topology and to the corrugations that are observed in the cell walls. The effect of the growth season in these features is described. Large variations in cell size, wall thickness and corrugations are reported.
Defects were introduced in a hexagonal liquid foam prepared by a novel technique and their coarsening was observed. Both isolated defect clusters, with and without dislocation character, and grain boundaries were produced. As the defects coarsen, a gradient of cell size develops along the direction of growth. Differences in the growth characteristics of isolated defects were found, depending on whether the average size of the cells in the defect clusters is larger (type I) or smaller (type II) than the size of the surrounding honeycomb cells. Clusters of type I show an approximately linear increase of diameter with time, while clusters of type II have an initial contraction. The evolution to the scaling regime of a honeycomb containing a distribution of type I clusters is discussed.
scite is a Brooklyn-based organization that helps researchers better discover and understand research articles through Smart Citations–citations that display the context of the citation and describe whether the article provides supporting or contrasting evidence. scite is used by students and researchers from around the world and is funded in part by the National Science Foundation and the National Institute on Drug Abuse of the National Institutes of Health.