(2) the abrasive wear rate of the non quenched-tempered steel collar and coated tubing assembly is lower than that of the 20CrMo collar and J55 tubing assembly and the 20CrMo collar and N80 tubing assembly under any temperature condition;
The pressure drawdown are measured in fore and rearward of the collar. The results show that in stationary flow formula of resstance coefficient of collar is λ=6×10~9Re~(-1.707 9), that in non stationary flow formula of resistance coefficient of collar is λ=0.223n~2-3.77n+20.390.
Fluctuations of the flow parameters of an incompressible viscous fluid in a collar-type flow throttling device
A major but probably not the sole photoreceptor pigment in Neurospora cells is WCC, a heterodimeric complex formed by the PAS-domain-containing polypeptides WC-1 and WC-2, the products of genes white collar-1 and white collar-2.
The purpose of this communication is to analyze the role of ROS in light signal transduction, mediated in Neurospora crassa cells by the White Collar Complex.
polygenea are lecithotrophic and only grow slightly in size in the course of development, and like all sacculinids, they have no flotation collar.
In males, there are lophophoral organs in the tentacular crown; under the lophophore, there is an epithelial fold or collar.