10 research outputs found

    Observation of a new boson at a mass of 125 GeV with the CMS experiment at the LHC

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    Kinetic and stoichiometric characterization for efficient enhanced biological phosphorus removal (EBPR) process at high temperatures

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    A recently reported stable and efficient EBPR system at high temperatures around 30 degrees C has led to characterization of kinetic and stoichiometric parameters of the Activated Sludge Model no. 2d (ASM2d). Firstly, suitable model parameters were selected by identifiability analysis. Next, the model was calibrated and validated. ASM2d was found to represent the processes well at 28 and 32 degrees C except in polyhyroxyalkanoate (PHA) accumulation of the latter. The values of the kinetic parameters for PHA storage (q(PHA)), polyphosphate storage (q(PP)) and growth (mu(PAO)) of polyphosphate-accumulating organisms (PAOs) at 28 and 32 degrees C were found to be much higher than those reported by previous studies. Besides, the value of the stoichiometric parameter for the requirement of polyphosphate for PHA storage (Y-PO4) was found to decrease as temperature rose from 28 to 32 degrees C. Values of two other stoichiometric parameters, i.e. the growth yield of heterotrophic organisms (Y-H) and PAOs (Y-PAO), were high at both temperatures. These calibrated parameters imply that the extremely active PAOs of the study were able to store PHA, store polyphosphate and even utilize PHA for cell growth. Besides, the parameters do not follow the Arrhenius correlation due to the previously reported unique microbial clade at 28 and 32 degrees C, which actively performs EBPR at high temperatures

    Cytotoxic Lignan Esters from Cinnamomum osmophloeum

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    ! The bark and roots of Cinnamomum osmophloeum are widely used in Taiwan as spice substitutes for C. cassia. We have isolated three novel lignan esters, one dibenzylbutane-type ligan ester [9,9'di- O-feruloyl-(+)-5,5'-dimethoxy secoisolariciresinol (3)] and two cyclolignan esters [(7' S, 8' R, 8R) -lyoniresinol-9-O-(E)-feruloyl ester (5) and (7' S, 8' R, 8R)-lyoniresinol-9,9'-di-O-(E) -feruloyl ester (6)], and several known lignans from the heartwood and roots of C. osmophloeum. We identified these compounds using 1D and 2D NMR spectroscopy and mass spectrometry. Cytotoxicity assays of these novel lignan esters revealed that compound 6 has strong activities against human liver cancer (HepG2 and Hep3B) and oral cancer (Ca9-22) cells, with IC(50) values of 7.87, 4.31, and 2.51 mu g/mL, respectively

    Steroid Reference Collection. Announcement

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    A New Boson with a Mass of 125 GeV Observed with the CMS Experiment at the Large Hadron Collider

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    The Higgs boson was postulated nearly five decades ago within the framework of the standard model of particle physics and has been the subject of numerous searches at accelerators around the world. Its discovery would verify the existence of a complex scalar field thought to give mass to three of the carriers of the electroweak force-the W+, W-, and Z(0) bosons-as well as to the fundamental quarks and leptons. The CMS Collaboration has observed, with a statistical significance of five standard deviations, a new particle produced in proton-proton collisions at the Large Hadron Collider at CERN. The evidence is strongest in the diphoton and four-lepton (electrons and/or muons) final states, which provide the best mass resolution in the CMS detector. The probability of the observed signal being due to a random fluctuation of the background is about 1 in 3 x 10(6). The new particle is a boson with spin not equal to 1 and has a mass of about 1.25 giga-electron volts. Although its measured properties are, within the uncertainties of the present data, consistent with those expected of the Higgs boson, more data are needed to elucidate the precise nature of the new particle

    Observation of a new boson at a mass of 125 GeV with the CMS experiment at the LHC

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    The article is the pre-print version of the final publishing paper that is available from the link below.Results are presented from searches for the standard model Higgs boson in proton–proton collisions At √s = 7 and 8 TeV in the Compact Muon Solenoid experiment at the LHC, using data samples corresponding to integrated luminosities of up to 5.1 fb−1 at 7TeV and 5.3 fb−1 at 8 TeV. The search is performed in five decay modes: γγ, ZZ, W+W−, τ+τ−, and bb. An excess of events is observed above the expected background, with a local significance of 5.0 standard deviations, at a mass near 125 GeV, signalling the production of a new particle. The expected significance for a standard model Higgs boson of that mass is 5.8 standard deviations. The excess is most significant in the two decay modes with the best mass resolution, γγ and ZZ; a fit to these signals gives a mass of 125.3±0.4(stat.)±0.5(syst.) GeV. The decay to two photons indicates that the new particle is a boson with spin different from one

    Architecture of Polymers: Topological Structure–Properties Relationship

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