in this paper, direct numerical simulation of two-phase incompressible gas-liquid flow for simulation of bubble motion in a microtube is presented. microtube radius is 10 µm. the interface is tracked using volume of fluid (vof) method with continuous surface force (csf) model. the flow is solved using a finite volume scheme, based on piso algorithm. numerical simulation is performed on a axisym...

Two distinct deoxyribonucleic acid polymerase activities have been purified from extracts of Zactobacillus acidophilus. Fraction I may be prepared from log phase and stationary phase cells. Fraction II appears initially in late log phase and increases to a maximum of 4.5 % of the total DNA polymerase activity found in extracts of stationary phase cells. Fraction I and Fraction II have been puri...

Depletion forces play a role in the compaction and decompaction of chromosomal material in simple cells, but it has remained debatable whether they are sufficient to account for chromosomal collapse. We present coarse-grained molecular dynamics simulations, which reveal that depletion-induced attraction is sufficient to cause the collapse of a flexible chain of large structural monomers immerse...