1. Bonnet R. Growing group of extended-spectrum b-lactamases: the CTX-M enzymes. Antimicrob Agents Chemother 2004; 48: 1–14. 2. Weill FX, Perrier-Gros-Claude JD, Demartin Met al. Characterization of extended-spectrum-b-lactamase (CTX-M-15)-producing strains of Salmonella enterica isolated in France and Senegal. FEMS Microbiol Lett 2004; 238: 353–8. 3. Bouallègue-Godet O, Ben Salem Y, Fabre L et...

Study of spectral moments in semileptonic decays of the b hadron with the DELPHI detector at LEP. The measurement of the moments of hadronic mass spectrum and of lepton energy spectrum based on a sample of semileptonic decays of the b hadron selected from Z 0 → b ¯ b events recorded with the Delphi detector at LEP, are presented. These results are interpreted in terms of constraints on the quar...

We study the energy spectrum of bottomonium in perturbative QCD, taking α s (M Z) = 0.1181 ± 0.0020 as input and fixing m MS b (m MS b) on the Υ(1S) mass. Contrary to wide beliefs, perturbative QCD reproduces reasonably well the gross structure of the spectrum as long as the coupling constant remains smaller than one. We perform a detailed analysis and discuss the size of non-perturbative effec...

We compute the c ¯ b spectrum from a first principle Salpeter equation obtained in a preceding paper. For comparison we report also the heavy-light quarko-nium spectrum and the hyperfine separations previously presented only in a graphical form. Notice that all results are parameter free. The spectrum and properties of the c ¯ b systems have been calculated various times in the past in the fram...

background: resistance to contemporary broad-spectrum b-lactam antibiotics mediated by extended-spectrum b-lactamases (esbls) is increasing worldwide. klebsiella pneumoniae , an important cause of nosocomial and community acquired urinary tract infections has rapidly become the most common esbl producing organism. we examined esbl production in urinary isolates of k. pneumoniae in relation to t...

Let A and B be bounded linear operators on a Banach space such that ABA = A2 and BAB = B2. Then A and B have some spectral properties in common. This situation is studied in the present paper. 1. Terminology and motivation Throughout this paper X denotes a complex Banach space and L(X) the Banach algebra of all bounded linear operators on X. For A ∈ L(X), let N(A) denote the null space of A, an...

The hadronic invariant mass spectrum for the inclusive charmless semileptonic decay B → Xu e ν̄e is studied. Particular attention is paid to the region sH < mD, which may be useful for extracting the value of |Vub|. The sensitivity of the spectrum to the parameter Λ̄ ≡ mB − mb is explored. Perturbative QCD corrections to dΓ/dsH of order α 2 sβ0 are calculated. For sH ∼ Λ̄mb nonperturbative QCD eff...

The sensitivity of the Sudbury Neutrino Observatory (SNO) to measure the shape of the recoil electron spectrum in the charged-current reaction of 8B solar neutrinos interacting with deuterium can be improved if the results of a 8Li beta-decay calibration experiment are included in the test. We calculate an improvement in sensitivity, under certain idealistic assumptions, of about a factor of 2,...

Irradiating the mycelium of Neurospora crassa with moderate intensities of blue light causes a reversible photoreduction of a b-type cytochrome. The action spectrum for the photoreduction of cytochrome b is very similar to the absorption spectrum of flavin pigments. Prolonged irradiation of the mycelium with strong blue light irreversibly bleaches flavin-like pigments and as these pigments are ...