The direct collapse (DC) is a promising mechanism that provides massive seed black holes (BHs) with $\sim 10^{5}~M_{\odot}$ in the early universe. To study long-term accretion growth of DCBH thus formed, we perform cosmological radiation-hydrodynamics simulations, extending our previous work where investigated its formation stage. With high spatial resolution down below Bondi radius, show rate ...

The simple combination of a bulky TIPS group on nitrogen and C–H activation using nBuLi–TMEDA allows direct functionalization the hindered bay region carbazole.

international travel has become increasingly common and accessible, hence, about two billion passengers undertake international and domestic air travel each year. venous thromboembolism (vte) is a serious public health disorder which may occur following prolonged travel, especially after air travel. a direct relation between vte development and prolonged travels has been documented, while some ...

since the surface water is one of the main potable water resources, the usage of chlorine as a disinfectant has increased. consequently the production rate of disinfection by-products (dbps) such as trihalomethane (thm) compounds has grown dramatically. in this paper the thms concentration changes in the sangar water treatment plant (swtp) and rasht water distribution system (rwds) is presented...

A problem to account for the direct electron-positron annihilation in positron-hydrogen scattering above the positronium formation threshold has been resolved within the time independent formalism. The generalization of the optical theorem is derived for the case when an absorption potential is present in the Hamiltonian. With this theorem the annihilation cross section is fully determined by s...

Ozone process has been widely used for drinking water treatment recently. In the oxidation process, bromate is formed by three pathways, i.e., the direct pathway, the direct-indirect pathway and the indirect-direct pathway. This study developed a method to calculate the percentage of these three pathways for bromate formation during O3 process and O3/H2O2 process. Two kinds of water, distilled ...