Binarization process plays an important role in structural characterization by means of micro-CT images analysis. The choice of the correct threshold to separate porous phase from the material is the procedure for binary images creation. Slight variations of the threshold level led to substantial variations in physical parameters determination. The aim of this work is to evaluate these variatio...

The time sequence of nuclear pore frequency changes was determined for phytohemagglutinin (PHA)-stimulated human lymphocytes and for HeLa S-3 cells during the cell cycle. The number of nuclear pores/nucleus was calculated from the experimentally determined values of nuclear pores/micro(2) and the nuclear surface. In the lymphocyte system the number of pores/nucleus approximately doubles during ...

Micro silica (MS) is an extremely fine, spherical powder that is used as an additive for improving concrete performance. It is obtained as a by product of silicon metal and ferrosilicon alloy production.  Due to its pozzolanic nature, micro silica can be used to enhance the qualities of both  fresh  and  hardened  concrete. Addition of micro silica into the concrete as a cement rep...

Microwave (MW) drying method was adopted to enhance the liquid permeability of Scots pine lumber. Structure changes were characterized by stereoscope microscope, scanned electron microscope (SEM) and transmission (TEM) examination. Pore parameters before after MW treatment detected mercury intrusion porosimetry (MIP) method, effect structure on analyzed. As SEM TEM examination results shown, ma...

• Hydrate synthesis and decomposition occur simultaneously throughout phase transition process. growth habit is not monotonous change in fractured-porous medium sandstone at different stages of transition. occurences differs from that porous matrix system. The preferential occurence hydrates fracture leads to significantly permeability changes. Natural gas hydrate, as an efficient clean energy ...