Gamma-ray bursts are now known to be a cosmological population of objects, which are often accompanied by X-ray and optical afterglows. The total energy emitted in the afterglow can be similar to the energy radiated in the gamma-ray burst itself. If a galaxy containing a large column density of dust is near the line of sight to a gamma-ray burst, small-angle scattering of the X-rays due to diff...

In this paper, we prove that ζ is not a solution of any non-trivial algebraic differential equation whose coefficients are polynomials in Γ(α),Γ(n),Γ(l) over the ring C, l>n>α≥0 nonnegative integers. We extend result does satisfy Γ,Γ′,Γ″ field complex numbers, which proved by Li and Ye [Li BQ, Z. Algebraic equations concerning Riemann zeta function Euler gamma function. Indiana Univ Math J. 201...

The cross section for exclusive $\mathrm{\ensuremath{\Upsilon}}$ ultraperipheral photoproduction at present and future colliders is determined using the low $x$ gluon parton distribution function extracted from an analysis of $J/\ensuremath{\psi}$ measurements performed Hadron-Electron Ring Accelerator Large Hadron Collider. Predictions are given next-to-leading order in collinear factorization...

The centrosome organizes microtubules by controlling nucleation and anchoring processes. In mammalian cells, subdistal appendages of the mother centriole are major microtubule-anchoring structures of the centrosome. It is not known how newly nucleated microtubules are anchored to these appendages. We show here that ninein, a component of subdistal appendages, localizes to the centriole via its ...

The afterglow of the Gamma-Ray Burst (GRB) 000301C exhibited achromatic, short time-scale variability that is difficult to reconcile with the standard relativistic shock model. We interpret the observed light curves as a microlensing event superimposed on power-law flux decays typical of afterglows. In general, a relativistic GRB shock appears on the sky as a thin ring expanding at a superlumin...

Pericentrin and gamma-tubulin are integral centrosome proteins that play a role in microtubule nucleation and organization. In this study, we examined the relationship between these proteins in the cytoplasm and at the centrosome. In extracts prepared from Xenopus eggs, the proteins were part of a large complex as demonstrated by sucrose gradient sedimentation, gel filtration and coimmunoprecip...

This is a further investigation of our approach to group actions in homological algebra the settings homology $$\Gamma $$ -simplicial groups, particularly -equivariant and cohomology -groups. new direction called -homological algebra. The abstract kernel non-abelian extensions its relationship with obstruction theory, second are extended case -extensions We compute rational (co)homology groups ...

Prazosin (2-[4-(2-furanoyl)-piperazin-1-yl]-4-amino-6,7-dimethoxyquinazoline) is an antihypertensive agent that was introduced to the market in 1976. It has since established an excellent safety record. However, in vitro metabolism of prazosin has not been investigated. This study describes the in vitro biotransformation of prazosin in liver microsomes from rats, dogs, and humans, as well as ra...

Let R be a commutative ring with nonzero identity and Z(R) its set of zero-divisors. The new extension the zero-divisor graph $$\widetilde{\Gamma }(R)$$ vertices $$Z(R)^{\star }$$ , two distinct x y are adjacent if only $$xy=0$$ or $$x+y\in Z(R)$$ . In this article, we study, in general case, For any R, provide sufficient necessary conditions for }(R[x_1,\dots x_n])$$ to complete. At last, pres...

BACKGROUND Proline residues affect protein folding and stability via cis/trans isomerization of peptide bonds and by the C(gamma)-exo or -endo puckering of their pyrrolidine rings. Peptide bond conformation as well as puckering propensity can be manipulated by proper choice of ring substituents, e.g. C(gamma)-fluorination. Synthetic chemistry has routinely exploited ring-substituted proline ana...