Unlike particle correlations and the strange quark matter distillation process

We present a new technique for observing the strange quark matter distillation process based on unlike particle correlations. A simulation is presented based on the scenario of a two-phase thermodynamical evolution model.Comment: 15 pages, 2 figures, 1 tabl

Quasicondensate and superfluid fraction in the 2D charged-boson gas at finite temperature

The Bogoliubov - de Gennes equations are solved for the Coulomb Bose gas describing a fluid of charged bosons at finite temperature. The approach is applicable in the weak coupling regime and the extent of its quantitative usefulness is tested in the three-dimensional fluid, for which diffusion Monte Carlo data are available on the condensate fraction at zero temperature. The one-body density matrix is then evaluated by the same approach for the two-dimensional fluid with e^2/r interactions, to demonstrate the presence of a quasi-condensate from its power-law decay with increasing distance and to evaluate the superfluid fraction as a function of temperature at weak coupling.Comment: 9 pages, 2 figure

Observation of hard scattering in photoproduction events with a large rapidity gap at HERA

Events with a large rapidity gap and total transverse energy greater than 5 GeV have been observed in quasi-real photoproduction at HERA with the ZEUS detector. The distribution of these events as a function of the $\gamma p$ centre of mass energy is consistent with diffractive scattering. For total transverse energies above 12 GeV, the hadronic final states show predominantly a two-jet structure with each jet having a transverse energy greater than 4 GeV. For the two-jet events, little energy flow is found outside the jets. This observation is consistent with the hard scattering of a quasi-real photon with a colourless object in the proton.Comment: 19 pages, latex, 4 figures appended as uuencoded fil

Observation of Events with an Energetic Forward Neutron in Deep Inelastic Scattering at HERA

In deep inelastic neutral current scattering of positrons and protons at the center of mass energy of 300 GeV, we observe, with the ZEUS detector, events with a high energy neutron produced at very small scattering angles with respect to the proton direction. The events constitute a fixed fraction of the deep inelastic, neutral current event sample independent of Bjorken x and Q2 in the range 3 · 10-4 \u3c xBJ \u3c 6 · 10-3 and 10 \u3c Q2 \u3c 100 GeV2

Molecular cloning and expression of a purine-specific N-ribohydrolase from Trypanosoma brucei brucei. Sequence expression and molecular analysis

N-Ribohydrolases, including the inosine-adenosine-guanosine-preferring (IAG) nucleoside hydrolase, have been proposed to be involved in the nucleoside salvage pathway of protozoan parasites and may consitute rational therapeutic targets for the treatment of these diseases. Reported is the complete sequence of the Trypanosoma brucei brucei iagnh gene, which encodes IAG-nucleoside hydrolase. The 1.4 kilobase iagnh cDNA contains an open reading frame of 981 base pairs, corresponding to 327 amino acids. The iagnh gene is present as one copy/haploid genome and is located on the size-polymorphic pair of chromosome III or IV in the genome of T. b. brucei. In Southern blot analysis, the iagnh probe hybridized strongly with Trypanosoma brucei gambiense, Trypanosoma brucei rhodesiense, Trypanosoma evansi, Trypanosoma congolense, and Trypanosoma vivax and to a lesser extent, with Trypanosoma cruzi genomic DNA. The iagnh gene is expressed in blood-stream forms and procyclic (insect) life-cycle stages of T. b. brucei. There are no close amino acid homologues of LAG-nucleoside hydrolase outside bacterial, yeast, or parasitic organisms. Low amino acid sequence similarity is seen with the inosine-uridine-preferring nucleoside hydrolase isozyme from Crithidia fasciculata. The T. b. brucei iagnh open reading frame was cloned into Escherichia coli BL21 (DE3), and a soluble recombinant LAG-nucleoside hydrolase was expressed and purified to > 97 percent homogeneity. The molecular weights of the recombinant LAG-nucleoside hydrolase, based on the amino acid sequence and observed mass, were 35,735 and 35,737, respectively. The kinetic parameters of the recombinant LAG-nucleoside hydrolase are experimentally identical to the native IAG-nucleoside hydrolase

45.8-Gb/s and 125-Gb/s CP-QPSK/CP-BPSK field trial over installed submarine cable

We show successful transmission of 45.8-Gb/s and 125-Gb/s coherent-detected polarization-multiplexed quadrature phase-shift keying (CP-QPSK) over both 2054 km and 4108 km of 10-Gb/s non-return to zero (NRZ) optimized field-deployed submarine cable. Moreover we report successful transmission of 45.8-Gb/s coherent-detected polarization-multiplexed binary phase-shift keying (CP-BPSK) over 9420 km of legacy submarine fiber. We present single channel transmission results, as well as wavelength-division multiplexed (WDM) transmission results with co-propagating WDM channels placed on a 100-GHz and on a 50-GHz grid, where we optimized the transmission performance by sweeping the launch power and pre-compensation. For 45.8-Gb/s CP-QPSK a margin with respect to the FEC-limit of 1.7 dBQ was obtained after transmitting over a 4108 km distance in a 50-GHz grid WDM configuration. Considering the transmission of 125-Gb/s CP-QPSK over the same distance and with the same channel configuration, a 1.1 dBQ margin was measured, showing the feasibility of a tenfold increase in transmission capacity over legacy submarine fiber. This significantly delays the costly alternative of deploying a new submarine cable. For the transmission of a 45.8-Gb/s CP-BPSK modulated signal on a 50-GHz WDM grid over a 9420 km distance, a margin of 1.2 dBQ with respect to the FEC-limit is reported. This underlines the great robustness of CP-BPSK towards nonlinear fiber impairments and thereby the feasibility to cross trans-oceanic distances with this modulation format

Orbital wall thickness and the spread of infection from the paranasal sinuses

Peer Reviewedhttp://deepblue.lib.umich.edu/bitstream/2027.42/72646/1/j.1365-2273.1985.tb00243.x.pd