نتایج جستجو برای: 1535 gr
تعداد نتایج: 14803 فیلتر نتایج به سال:
The light cone QCD sum rules are employed to calculate the πNN(1535) coupling gπNN∗ . We study the two point correlation function of two nucleon currents sandwiched between the vacuum and the pion state. The contribution from the excited states and the continuum is subtracted cleanly through the double Borel transform with respect to the nucleon andN(1535) momenta, p1, p 2 2 = (p−q) . Our calcu...
We have screened a panel of tetracycline (tc)-like compounds for their potential use with tc-repressor (tetR) based gene switches. The interaction between tc and tetR appears quite specific, as only tc itself and its close homologues anhydro-tc and doxycycline strongly inhibited DNA binding. However, a single tc-like compound, GR33076X, increased DNA binding of the tetR-VP16 fusion protein, bot...
We calculate the coupling constants, gπNS11 and gηNS11 , using QCD sum rules in the presence of an external meson field. A covariant derivative is introduced within the S11 interpolating field so that in the nonrelativistic limit the field dominantly reduces to two quarks in the s-wave state and one quark in the p-wave state. Our result for the couplings obtained by further making use of the so...
Two chimpanzees, 1535 and 1536, became persistently infected following inoculation with RNA transcripts from cDNA clones of hepatitis C virus (HCV). Analysis of the HCV genomes from both animals showed an accumulation of amino acid substitutions over time. The appearance of substitutions in the envelope genes was associated with increased antienvelope antibody titers. However, extensive mutatio...
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