High-temperature butyl acrylate polymerizations in bulk and solution are investigated experimentally by kinetic Monte Carlo (kMC) simulations. The experimental data comprise conversion-time data, molar mass distributions, branching levels per polymer chain derived from size-exclusion chromatography with a multiangle laser light scattering detector. A kMC model is established, which allows for t...

1. Neuroscientists are currently hypothesizing on how voltage-dependent channels, in dendrites with spines, may be spatially distributed or how their numbers may divide between spine heads and the dendritic base. A new cable theory is formulated to investigate electrical interactions between many excitable and/or passive dendritic spines. The theory involves a continuum formulation in which the...

optimization of the condition for pcr-directed sequencing of microsatellites poly adenine (a) length polymorphisms is more difficult and sensitive compared with other common sequences. replication slippage may occur for polymerase enzyme during microsatellite amplification and direct sequencing of these pcr products will be challenging for heterozygote samples. so, the aim of this study is to i...

As a contribution to quantum optics in the vicinity of surfaces we study the single atom spontaneous emission in a linear chain of two-level atoms. The electromagnetic field is thereby treated with the help of integro-differential equations which take into account the interaction with the other atoms in the chain. The life time of the excited atom, the frequency shift of the atomic transition a...

BACKGROUND/AIMS To clarify the anatomy of the pancreatic duct system and to investigate its embryology. METHODS We reviewed pancreatograms of 256 patients with a normal pancreatic head and 36 cases of complete pancreas divisum. RESULTS Accessory pancreatograms were divided into two patterns. The long-type accessory pancreatic duct (APD) forms a straight line and joins the main pancreatic du...

regarding the importance of sciatic nerve distribution in replacement of anal sphincter and sciatic nerve block we decided to study this matter for the first time in iran. in this way 100 cadavers (88% male and 12% female) were dissected and studied by loop microscope. the results shows that primarily, according to the first branch derived from sciatic; there would be 4 main groups. if this sam...

We report dynamic Monte Carlo simulation on conformational transition of H-shaped branched polymers by varying main chain (backbone) and side chain (branch) length. H-shaped polymers in comparison with equivalent linear polymers exhibit a depression of theta temperature accompanying with smaller chain dimensions. We observed that the effect of branches on backbone dimension is more pronounced t...

Numerical simulations of pulsatile blood flow through a symmetrical branch modeling the aortic bifurcation were carried out to assess several hemodynamic theories of atherogenesis by comparing the distribution of hemodynamic variables with that of early lesions in arterial branches. Considerable spatial and temporal variations in wall shear were found when the flow was pulsatile; the highest va...