3,531 research outputs found

    Ethyl 4-hydr­oxy-2,6-diphenyl-1-(2-thio­morpholinopropano­yl)-1,2,5,6-tetra­hydro­pyridine-3-carboxyl­ate

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    In the title compound, C27H32N2O4S, the thio­morpholine ring adopts a chair conformation and the tetra­hydro­pyridine ring is in a distorted envelope conformation. The mol­ecular structure is stabilized by an intra­molecular O—H⋯O inter­action and the crystal packing is stabilized by an inter­molecular C—H⋯O inter­action, generating an S(6) motif and a dimer of the type R 2 2(18), respectively

    Bocavirus Infection in Hospitalized Children, South Korea

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    This study presents the first evidence of human bocavirus infection in South Korean children. The virus was detected in 27 (8.0%) of 336 tested specimens, including 17 (7.5%) of 225 virus-negative specimens, collected from children with acute lower respiratory tract infection

    Sub-100-as timing jitter optical pulse trains from mode-locked Er-fiber lasers

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    We demonstrate sub-100-attosecond timing jitter optical pulse trains generated from free-running, 77.6-MHz repetition-rate, mode-locked Er-fiber lasers. At -0.002(\pm0.001) ps2 net cavity dispersion, the rms timing jitter is 70 as (224 as) integrated from 10 kHz (1 kHz) to 38.8 MHz offset frequency, when measured by a 24-as-resolution balanced optical cross-correlator. To our knowledge, this result corresponds to the lowest rms timing jitter measured from any mode-locked fiber lasers so far. The measured result also agrees fairly well with the Namiki-Haus analytic model of quantum-limited timing jitter in stretched-pulse fiber lasers.Comment: 4 pages, 2 figures, to appear in Optics Letter

    Nicolau Syndrome after Intramuscular Injection: 3 Cases

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    Nicolau syndrome is a rare complication of intramuscular injection consisting of ischemic necrosis of skin, soft tissue, and muscular tissue that arises locoregionally. The characteristic pattern is pain around the injection site, developing into erythema, a livedoid dermatitis patch, and necrosis of the skin, subcutaneous fat, and muscle tissue. Three patients were injected with drugs (diclofenac sodium, ketoprofen, meperidine) for pain relief. Three patients complained of pain, and a skin lesion was observed, after which necrosis developed on their buttocks. Each patient underwent debridement and coverage. The wound healed uneventfully. We report three cases of Nicolau syndrome in the buttocks following diclofenac intramuscular injection

    Regge phenomenology of pion photoproduction off the nucleon at forward angles

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    We present a Regge model for pion photoproduction which is basically free of parameters within the framework of the s-channel helicity amplitude. We use coupling constants of all exchanged mesons determined from empirical decay widths or from the SU(3) relations together with consistency check with existing estimates that are widely accepted in other reaction processes. Cross sections and spin polarization asymmetries at various photon energies are analyzed and results are obtained in better agreement with experimental data without referring to any fitting procedure.Comment: 19 pages, 20 figures, two column, revtex
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