3,625 research outputs found

    Review of \u3cem\u3eThe Epistemology of Resistance\u3c/em\u3e by Jose Medina

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    HOVERING CHARACTERISTICS OF A ROTOR HAVING AN AIRFOIL SECTION DESIGNED FOR AUTILITY TYPE OF HELICOPTER

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    Hovering characteristics of rotor having airfoil section designed for utility type helicopte

    A note on the effect of post-mortem maturation on colour of bovine Longissimus dorsi muscle

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    peer-reviewedFinancial support to P.G. Dunne was provided under the Walsh Fellowship programme of Teagasc.Fifteen heifers were housed and fed a concentrate diet while 54 counterparts grazed at pasture for 90 days at which stage six heifers from each group were slaughtered. The remaining animals in the pasture group were then housed and offered either: concentrate only; concentrate plus grass silage with silage accounting for either 20% or 50% of the total dry matter offered; or zero-grazed grass plus concentrate with grass accounting for 83% of the dry matter offered. Heifers (3/diet) were slaughtered 28, 56, 91 and 120 days thereafter. Colour characteristics of M. longissimus dorsi (LD) were measured at 48 h post mortem. The LD was then vacuum-packaged and stored at between 0 and 4 °C in darkness for 12 days, when colour characteristics were again measured. Maturation of LD resulted in meat that had higher redness values (‘a’ value; P<0.001) and a more intense red colour (higher ‘C’ value; P<0.001) at 14 days post mortem than at 2 days, regardless of diet/duration of feeding. Maturation also resulted in a brighter colour (higher ‘L’ value; P<0.001) but this difference was greatest when cattle were slaughtered the day-56 time point

    New methods for B meson decay constants and form factors from lattice NRQCD

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    We determine the normalisation of scalar and pseudoscalar current operators made from non-relativistic bb quarks and Highly Improved Staggered light quarks in lattice Quantum Chromodynamics (QCD) through O(αs)\mathcal{O}(\alpha_s) and ΛQCD/mb\Lambda_{\text{QCD}}/m_b. We use matrix elements of these operators to extract BB meson decay constants and form factors, then compare to those obtained using the standard vector and axial-vector operators. This provides a test of systematic errors in the lattice QCD determination of the BB meson decay constants and form factors. We provide a new value for the BB and BsB_s meson decay constants from lattice QCD calculations on ensembles that include uu, dd, ss and cc quarks in the sea and those which have the u/du/d quark mass going down to its physical value. Our results are fB=0.196(6)f_B=0.196(6) GeV, fBs=0.236(7)f_{B_s}=0.236(7) GeV and fBs/fB=1.207(7)f_{B_s}/f_B =1.207(7), agreeing well with earlier results using the temporal axial current. By combining with these previous results, we provide updated values of fB=0.190(4)f_B=0.190(4) GeV, fBs=0.229(5)f_{B_s}=0.229(5) GeV and fBs/fB=1.206(5)f_{B_s}/f_B = 1.206(5).Comment: 14 pages, 10 figure

    Fission yeast SWI/SNF and RSC complexes show compositional and functional differences from budding yeast.

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    SWI/SNF chromatin-remodeling complexes have crucial roles in transcription and other chromatin-related processes. The analysis of the two members of this class in Saccharomyces cerevisiae, SWI/SNF and RSC, has heavily contributed to our understanding of these complexes. To understand the in vivo functions of SWI/SNF and RSC in an evolutionarily distant organism, we have characterized these complexes in Schizosaccharomyces pombe. Although core components are conserved between the two yeasts, the compositions of S. pombe SWI/SNF and RSC differ from their S. cerevisiae counterparts and in some ways are more similar to metazoan complexes. Furthermore, several of the conserved proteins, including actin-like proteins, are markedly different between the two yeasts with respect to their requirement for viability. Finally, phenotypic and microarray analyses identified widespread requirements for SWI/SNF and RSC on transcription including strong evidence that SWI/SNF directly represses iron-transport genes
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