In this note, we give a precise construction ofone of the families 2-designs arose from studying ŕag-transitive with parameters(v, k, λ) whose replication numbersrare coprime to λ. We show that for given positive integer q=22n+1⩾8, there exists 2-design parameters (q2+ 1, q, q−1) and numberq 2 admitting Suzuki group Sz(q) asits automorphism group. also construct family q(q−1),(q−1)(q2−q−1)) the...

Pseudomonas aureofaciens Q2-87 produces the antibiotic 2,4-diacetophloroglucinol (Phl), which inhibits Gaeumannomyces graminis var. tritici and other fungi in vitro. Strain Q2-87 also provides biological control of take-all, a root disease of wheat caused by this fungus. To assess the role of Phl in the antifungal activity of strain Q2-87, a genetic analysis of antibiotic production was conduct...

The orbital angular momentum is one of the least understood of the spin characteristics of a proton. There are no direct ways to model Lz. However, the Jz = 1 2 sum rule includes an angular momentum component and can provide indirect access to properties of Lz. One of the other unknowns in the sum rule is the gluon polarization, ∆G. We can define the gluon spin asymmetry in a proton as A(x,Q2) ...

A simple orthogonal array OA(q2n−1, q2n−2, q, 2) is constructed by using the action of a large subgroup of PGL(n + 1, q2) on a set of non degenerate Hermitian varieties in PG(n, q2).

The pion form factor at very large Q2 is obtained by using a new pion wave function. It shows that when Q2 >> (1.8GeV )2 the pion form factor reaches the asymptotic limit αs(Q) Q .

A model for the Q2-dependent modified dual amplitude with Mandelstam analyticity (M-DAMA) is proposed. M-DAMA preserves all the attractive properties of DAMA, such as its pole structure and Regge asymptotics, and leads to a generalized dual amplitude A(s,t,Q2). This amplitude can be checked in the known kinematical limits, i.e. it should reduce to onshell hadronic scattering amplitude for Q2 = ...

The QCD sum rule for the correlator of topological charge densities χ(Q2) and related to it longitudinal part of the correlator of singlet axial currents is considered in the framework of instanton model. The coupling constant fη′ of η -meson with the singlet axial current is determined. Its value appears to be in a good coincidence with the value determined recently from the connection of the ...