Why do some amphibian organs regenerate and others do not? And why do most mammalian organs not regenerate? New work on lens regeneration indicates that the answer lies in the need for cells to dedifferentiate first, and that what makes them dedifferentiate may be the presence of thrombin in combination with cellular clotting factors.

An experimental testing program was conducted to quantify leakage through a geomembrane liner system when subjected to high hydraulic heads. Leakage through geomembranes is mainly due to the presence of defects, which may occur during installation and operation. Previous studies focused on leakage through landfill liners (i.e., low hydraulic heads) have led to analytical models and simplified e...

“Due to decades of technology acquisitions to fuel growing businesses, enterprises are now facing a breaking point with their IT systems. Some systems can’t share information and workloads, servers are highly underutilized and the cost of energy is becoming greater than the value of the systems the energy powers. In some cases, nearly 70 percent of companies’ IT budgets can be devoted to managi...

Durability problem of reinforced concrete for underground structures is a hot issue in the field of structural engineering. For underground structures, the prediction of structural service life and methodology for durability design are needed to estimate structural durability. Taking the case of Xiamen Xiang’an subsea tunnel as background, which is designed to meet the requirement of 100-year s...

Steroid receptors of the nuclear receptor superfamily are proposed to be either: 1) located in the cytosol and moved to the cell nucleus upon activation, 2) tethered to the inside of the plasma membrane, or 3) retained in the nucleus until free steroid hormone enters and activates specific receptors. Using computational methods to analyze peptide receptor topology, we find that the "classical" ...

PURPOSE Odontogenic cysts are classified into a developmental group, including follicular cysts (FC) and keratocysts, and an inflammatory group including radicular cysts (RC). In clinical cases, we frequently encounter RC and FC. The purpose of this study was to investigate the cytobiological differences between two odontogenic cyst-lining keratinocytes using a cytobiological approach from the ...