We present the first measurement of the proton–Ω correlation function in heavy-ion collisions for the central (0–40%) and peripheral (40–80%) Au + Au collisions at GeV by the STAR experiment at the ...Relativistic Heavy-Ion Collider (RHIC). Predictions for the ratio of peripheral collisions to central collisions for the proton–Ω correlation function are sensitive to the presence of a nucleon–Ω bound state. These predictions are based on the proton–Ω interaction extracted from -flavor lattice QCD calculations at the physical point. The measured ratio of the proton–Ω correlation function between the peripheral (small system) and central (large system) collisions is less than unity for relative momentum smaller than 40 MeV/c. Comparison of our measured correlation ratio with theoretical calculation slightly favors a proton–Ω bound system with a binding energy of ~ 27 MeV.
We report first measurements of e+e- pair production in the mass region 0.4 between 40 and 60 MeV/c. The absolute cross section of the excess depends weakly on centrality, while those from a ...theoretical model calculation incorporating an in-medium broadened ρ spectral function and radiation from a quark gluon plasma or hadronic cocktail contributions increase dramatically with an increasing number of participant nucleons. Model calculations of photon-photon interactions generated by the initial projectile and target nuclei describe the observed excess yields but fail to reproduce the p$\mathbb 2\atop{T}$ distributions.
The STAR Collaboration reports measurements of the longitudinal double-spin asymmetry, ALL, for neutral pions produced at forward directions in polarized proton-proton collisions, at a center-of-mass ...energy of 510 GeV. Results are given for transverse momenta in the range 2
We present the first measurements of the longitudinal double-spin asymmetry ALL for dijets with at least one jet reconstructed within the pseudorapidity range 0.8<η<1.8. The dijets were measured in ...polarized pp collisions at a center-of-mass energy s=200 GeV. Values for ALL are determined for several distinct event topologies, defined by the jet pseudorapidities, and span a range of parton momentum fraction x down to x~0.01. The measured asymmetries are found to be consistent with the predictions of global analyses that incorporate the results of previous RHIC measurements. They will provide new constraints on Δg(x) in this poorly constrained region when included in future global analyses.
Here, rapidity-odd directed flow measurements at midrapidity are presented for Λ, $\bar{Λ}$, K±, K$0\atop{s}$ and Φ at √sNN = 7.7, 11.5, 14.5, 19.6, 27, 39, 62.4 and 200 GeV in Au+Au collisions ...recorded by the STAR detector at the Relativistic Heavy Ion Collider. These measurements greatly expand the scope of data available to constrain models with differing prescriptions for the equation of state of quantum chromodynamics. Results show good sensitivity for testing a picture where flow is assumed to be imposed before hadron formation and the observed particles are assumed to form via coalescence of 3 constituent quarks. Lastly, the pattern of departure from a coalescence-inspired sum-rule can be a valuable new tool for probing the collision dynamics.
This paper presents a specialized system for quantitative measurement of medical images. Using Visual C++, we developed a computer-aided software based on Image-Pro Plus (IPP), a software development ...platform. When transferred to the hard disk of a computer by an MVPCI-V3A frame grabber, medical images can be automatically processed by our own IPP plug-in for immunohistochemical analysis, cytomorphological measurement and blood vessel segmentation. In 34 clinical studies, the system has shown its high stability, reliability and ease of utility.
Several approximate methods for propagating the density matrix of systems coupled to baths based on linearized approximations have been presented. Using influence functional formalism this ...approximation is explored in various limits for a condensed phase model. A new iterative stochastic propagation scheme is introduced that integrates out some of the bath degrees of freedom giving an effective evolution resembling Brownian dynamics. We show that this approach satisfies the fluctuation–dissipation theorem in various limits. The method is compared with alternative approximate full dimensional propagation schemes for the spin-boson model. The accuracy of the results is surprising since the scheme makes approximations about initialization at each iteration. This accuracy is encouraging since these kind of approaches hold significant potential computational saving for condensed phase quantum dynamics simulations as they give a systematic way of eliminating the explicit integration of a large number of environmental degrees of freedom.
The purification and characterization of a thermophilic neutral protease from Thermophilic bacillus strain HS08, originally isolated from a soil sample collected from the Tulufan Crater of China, is ...presented in this paper. The purification steps included ammonium sulfate precipitation, with columns of DEAE-Sepharose anion exchange chromatography and Sephacryl S-100HR on AKTA purifier 100 protein liquid chromatography. The method gave a 4.25 fold increase of the specific activity and had a yield of 5.1%. The molecular weight of the protease was found to be around 30.9 kDa by SDS-PAGE technique. The optimal pH and optimal temperature of the protease were at pH 7.5 and 65 degree C, respectively. The protease was found stable during the 1 h incubation at 5 degree C. The protease activity showed wide range of variation in the presence of different reagents: it was inhibited remarkably by EDTA or PMSF and was almost activated by 2 mM Zn super(2+), even though it was only marginally inhibited by other inhibitors. We concluded that the protease was a Zn super(2+)-acitived serine protease. Substrates specificity tests indicated that azocasein was the best substrate among the three substrates tested (azocasein, casein, and BSA).
Cobalt Sulfophthalocyanine (CoSPc) sensitized TiO@d2 sol samples were prepared through a Sol-Gel method using Cobalt Sulfophthalocyanine as a sensitizer. Loading and modified floating photocatalyst ...was prepared by hydrothermal method using fly-ash cenospheres as a carrier. The properties of the samples were characterized by scanning electron microscopy (SEM), X-ray diffraction (XRD), Fourier transform infrared (FT-IR) and UV-vis diffuse reflectance spectrum (DRS). Photocatalytic activity was studied by degrading wastewater of methylene blue under visible light. The results indicate that the fly-ash cenospheres are covered by modified TiO@d2 film which composed of the anatase, brookite and rutile misch crystal phase. CoSPc/TiO@d2/fly-ash cenospheres samples have good catalytic activity under visible light, and have strong absorbency during 600-700nm. The sensitization of CoSPc can enhance visible light catalytic activity of TiO@d2/fly-ash cenospheres. The degradation rate of methylene blue reaches 73.36% in 180min under the visible light illumination. But too much CoSPc can decrease its catalytic activity.
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