We are studying the liquid penetration in these wood species, and trying to find some knowledge on the micropore size of the pit membrane. Or the microscopist could provide some suggestions on how to test it by using FE-SEM or TEM.
Hi Jinzhen: You can find information on this in a book I edited in 1974, entitled Wood Deterioration and its Prevention by Preservative Treatments. Vol. II. Chapter 4. Factors influencing the treitibility of wood Syracuse Univ. Press . ISBN 0-8156-5037-X.