Grate bar is an industrial part which is used in the indurating furnace of an iron ore pelletizing plant. Steel part ofthe grate bars are expected to have high resistance to atmospheric oxidation because of its contact with hot gases(up to 920 °C) during the normal operation of the process. In this study, different samples from several sections ofused grate bars with apparent ...

In this study, the applicability of nanofiltration (NF) membranes as a pretreatment prior to reverse osmosis (RO) in seawater desalination was investigated. The membranes used wereNF270 and NF90 as the NF membranes, while the brackish water (BW) RO membrane BW30 was used as the RO membrane. In desalination tests, permeates of the NF membraneswere collected and used as the feed to th...

Abstract Inspired by the recent observation of a very narrow state, called , LHCb collaboration, possible bound states and low-lying resonance doubly-heavy tetraquark cc\bar{u}\bar{d} ( T_{cc} ) bb\bar{u}\bar{d} T_{bb} are searched in framework chiral quark model with an accurate few-body method, Gaussian expansion method. The real scaling method is also applied to identi...

Aims. This is the first paper of a series aimed to understand the formation and evolution of bars in early-type spirals and their influence in the evolution of the galaxy. Methods. Optical long-slit spectra along the major axis of the bar of a sample of 20 galaxies are analyzed. velocity and velocity dispersion profiles along the bar are presented. Line-strength indices in the bar region are al...