-It is widely held that sexual reproduction enhances the potential for evolution by expanding the range of variation on which selection can act. However, when nonadditive gene action contributes to the expression of traits under selection, sexual reproduction can also result in slippage of the mean genotypic value in the direction contrary to selection. We show how the magnitude of genetic slip...

We study the base pairing dynamics of DNA with repetitive sequences where local strand slippage can create, annihilate, and move bulge loops. Using an explicit theoretical model, we find a rich dynamical behavior as a function of an applied shear force f: reptationlike dynamics at f=f(c) with a rupture time tau scaling as N3 with its length N, drift-diffusion dynamics for f(c)<f<f(*), and a dyn...

As an unconventional natural gas, coalbed methane (CBM) has been recognized as a significant fuel and chemical feedstock that should be recovered. Permeability is key factor controls CBM transport in coal. The slippage effect influential phenomenon occurs during gas penetration processes, especially low-permeable media. Apparent permeability may differ greatly from intrinsic due to slippage. Ho...

Carbon nanotube yarns (CNTYs) spun only by twisting have a low mechanical strength due to the slippage of individual CNTs. This hinders practical applications CNTYs. Here, we studied slippage-inhibiting effect interfacial cross-linking nanotubes defluorination on properties free-standing MWCNTYs and compared with fracture tensile defluorinated MWCNTs. The increased increasing annealing temperat...