A graph is called symmetric if its full automorphism group acts transitively on the set of arcs. The Cayley graph $Gamma=Cay(G,S)$ on group $G$ is said to be normal symmetric if $N_A(R(G))=R(G)rtimes Aut(G,S)$ acts transitively on the set of arcs of $Gamma$. In this paper, we classify all connected tetravalent normal symmetric Cayley graphs of order $p^2q$ where $p>q$ are prime numbers.

background: rotaviruses cause diarrhea in infants and young children worldwide. rotavirus outer capsid protein, vp7 is major neutralizing antigen that is important component of subunit vaccine to prevent rotavirus infection. many efforts have been done to produce recombinant vp7 that maintain native characteristics. we used baculovirus expression system to produce rotavirus vp7 protein and to s...

In this Letter, the broad emission line (BEL) profiles of superluminal quasars with apparent jet velocities, βa > 10, (ultraluminal QSOs, or ULQSOs hereafter) are studied as a diagnostic of the velocity field of the BEL emitting gas in quasars. The ULQSOs are useful because they satisfy a very strict kinematical constraint, their parsec scale jets must be propagating within 12◦ of the line of s...