In recent years, experimental and theoretical research on the nature of supermassive bodies that inhabit central regions galaxies has grown significantly. this contribution, we study motion unitary mass test particles in a perturbed Kerr-like metric. The metric represents approximate exterior spacetime massive rotating body with quadrupole moment $q$. Through extensive geodesics, it is found ch...

Oxytetracycline (OTC) is one of the broad-spectrum antibiotics widely used for treatment fish-farm infection. Considering that behavior directly related to reproduction, individual fitness, and survival, it important evaluate impact on behavioral repertoire in fish. Zebrafish (Danio rerio) presents a well-described reliably demonstrate complex responses chemical compound exposure. This work aim...

We show that in the Dirac-Milne universe (a matter-antimatter symmetric where two components repel each other), rotation curves are generically flat beyond characteristic distance of about 3 virial radii, and a Tully-Fisher relation with exponent $\approx 3$ is satisfied. Using 3D simulations modified version RAMSES code, we cosmology presents Faber-Jackson very small scatter an equal to betwee...