A hypothesis for explaining the differential anisotropic shrinkage behavior of wood has been proposed, and it was based on the differences in the cell wall ultrastructure. The starting point of the consideration is that wood shrinkage is governed by its chemical composition, ultrastructure, and gross anatomy. It is also well known that the transverse shrinkage anisotropy of earlywood (EW) is mo...

T HE GROWING BODY of research into the ultrastructure of the myocardial cell and the function of subcellular systems in the heart has reached proportions that make it both useful and pertinent to bring important new concepts in this area to the attention of the clinical cardiologist. Work on myocardial ultrastructure is no longer the province of the cellular anatomist and physiologist; increasi...