Jehan Mansour

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The L-asparaginase (E. C. 3. 5. 1. 1) enzyme was purified to homogeneity from Pseudomonas aeruginosa 50071 cells that were grown on solid-state fermentation. Different purification steps (including ammonium sulfate fractionation followed by separation on Sephadex G-100 gel filtration and CM-Sephadex C50) were applied to the crude culture filtrate to obtain(More)
We report evidence for the simultaneous production of J/ψ and ϒ mesons in 8.1  fb^{-1} of data collected at sqrt[s]=1.96  TeV by the D0 experiment at the Fermilab pp[over ¯] Tevatron Collider. Events with these characteristics are expected to be produced predominantly by gluon-gluon interactions. In this analysis, we extract the effective cross section(More)
We present a measurement of the direct CP-violating charge asymmetry in B(±) mesons decaying to J/ψK(±) and J/ψπ(±) where J/ψ decays to μ(+) μ(-), using the full run II data set of 10.4 fb(-1) of proton-antiproton collisions collected using the D0 detector at the Fermilab Tevatron Collider. A difference in the yield of B(-) and B(+) mesons in these decays(More)
Introduction Hyperpolarized noble gas magnetic resonance imaging (HP gas MRI) is a new and innovative imaging method that has made it possible, for the first time, to obtain high resolution MR images of air-filled organs such as the lungs, as well as lipid rich tissue such as the brain. Unlike conventional MRI which relies on the detection of water protons(More)
The treatment of infected nonunions is difficult. Antibiotic cement-coated (ACC) rods provide stability as well as delivering antibiotics. We conducted a review of 110 infected nonunions treated with ACC rods. Patients were divided into two groups: group A (67 patients) with an infected arthrodesis, and group B (43 patients) with an infected nonunion in a(More)
Inclusive π0 and direct-photon cross sections in the kinematic range 3.5< pT <12 GeV/c with central rapidities (ycm) are presented for 530 and 800 GeV/c proton beams and a 515 GeV/c π− beam incident on Be targets. Current Next-to-Leading-Order perturbative QCD calculations fail to adequately describe the data for conventional choices of scales. Kinematic(More)
We present the result of a search for charged Higgs decays of the top quark, produced in pp̄ collisions at √ s = 1.8 TeV. When the charged Higgs is heavy and decays to a tau lepton, which subsequently decays hadronically, the resulting events have a unique signature: large missing transverse energy and the low-charged-multiplicity tau. Data collected in the(More)
F. Abe, M. G. Albrow, S. R. Amendolia, D. Amidei, J. Antos, C. AnwayWiese, G. Apollinari, H. Areti, M. Atac, P. Auchincloss, F. Azfar, P. Azzi, N. Bacchetta, W. Badgett, M. W. Bailey, J. Bao, P. de Barbaro, A. BarbaroGaltieri, V. E. Barnes, B. A. Barnett, P. Bartalini, G. Bauer, T. Baumann, F. Bedeschi, S. Behrends, S. Belforte, G. Bellettini, J. Bellinger,(More)
We present constraints on models containing non-standard-model values for the spin J and parity P of the Higgs boson H in up to 9.7 fb(-1) of pp collisions at sqrt[s] = 1.96 TeV collected with the D0 detector at the Fermilab Tevatron Collider. These are the first studies of Higgs boson J(P) with fermions in the final state. In the ZH → ℓℓbb, WH → ℓνbb, and(More)
We report the first observation of single-top-quark production in the s channel through the combination of the CDF and D0 measurements of the cross section in proton-antiproton collisions at a center-of-mass energy of 1.96 TeV. The data correspond to total integrated luminosities of up to 9.7 fb(-1) per experiment. The measured cross section is σ(s) =(More)