57,301 research outputs found
Gene trees for orthologous groups from "The evolution of nitrogen fixation in cyanobacteria"
No full textPhylogenetic trees for the orthologous groups predicted across 49 taxa of Cyanobacteria and 16 Proteobacteria by Latysheva et al. (2012, Bioinformatics 28:603-606; doi:10.1093/bioinformatics/bts008) are provided here. For the 13854 groups containing at least three protein sequences, phylogenies were reconstructed as follows. Multiple alignment of protein sequences was performed using MAFFT (Katoh and Toh 2008, doi:10.1093/bib/bbn013), in "E-INS-I" mode with 1000 iterations. A phylogenetic model was selected for each protein multiple alignment by the Bayesian Information Criterion in MODELGENERATOR (Keane et al. 2006, doi:10.1186/1471-2148-6-29), with four Gamma-distributed rate categories for "+G" models. 200 bootstrap replicates of the multiple alignment were generated using seqboot in the PHYLIP package (Felsenstein, J. Distributed by the author. Department of Genome Sciences, University of Washington, Seattle). Using the selected model, phylogeny was reconstructed by maximum likelihood with PhyML (Guindon et al. 2010, doi:10.1093/sysbio/syq010), both for the original alignment and for the bootstrap replicates.mltrees.zip: 13584 unrooted ML trees in PHYLIP format. The start of each filename gives the orthologous group number. Tip labels in trees consist of the protein accession, followed by an underscore, then the three-letter abbreviation for the taxon. Orthologous group numbers and taxon abbreviations are as in Latysheva et al. (2012, 10.1093/bioinformatics/bts008).
bstrees.zip: 13584 bootstrap samples, each of 200 trees, in PHYLIP format. The start of each filename gives the orthologous group number. Tips are labelled as in mltrees.zip
Wilson G. Barker
No full textWilson Barker founded the Buffalo Male and Female Institute (later Milligan College), in 1867
Resolution of electrical imaging of fluid movement in landfills
No full textThis paper investigates the efficacy of time-lapse electrical imaging using surface electrodes to monitor the movement of leachate within a landfill. A laboratory-based study allowed direct comparison between observed physical dewatering and time-lapse electrical imaging data. In combination with a forward modelling study this demonstrated the limitations and advantages of this geophysical technique in terms of its applicability, resolution and complementarity to conventional dewatering monitoring techniques. It also confirmed the nature, likely magnitude and impact of artefacts created by the resistivity inversion process and highlighted the potential for misinterpretation of results. An 18-month study provided field results comparing hydrogeological and imaging data during the dewatering of a real landfill system. Insights gained from the laboratory study and forward modelling exercise greatly enhanced the interpretation of the field data, enabling the method to be applied with greater confidence in the future. The need to combine a forward modelling exercise with any interpretation of resistivity data is clearly demonstrate
[Letter to J. G. O'Rielly Regarding Firefighting - October 15, 1943]
No full textLetter to J. G. O'Rielly of W. S. Darley & Company discussing the champion type "H" pump and an enclosed list of fire chiefs located throughout the Middle East. The author of this letter recommends that Mr. Rielly send photographs and the highest pressure recorded on this pump to Captain James C. Thompson
Letter re: Will Rogers visit
No full textLetter from Nora Barker to Amon Carter regarding the meeting plans Barker had with Will Roger
Use of synchrotron tomographic techniques in the assessment of diffusion parameters for solute transport in groundwater flow
No full textThis technical note describes the use of time-resolved synchrotron radiation tomographic energy dispersive diffraction imaging (TEDDI) and tomographic X-ray fluorescence (TXRF) for examining ion diffusion in porous media. The technique is capable of tracking the diffusion of several ion species simultaneously. This is illustrated by results which compare the movement of Cs+, Ba2+ and La3+ ions from solution into a typical sample of English chalk. The results exhibited somewhat anomalous (non-Fickian) behaviour and revealed heterogeneities (in 1D) on the scale of a few millimetres
Insights into deposit formation in high pressure diesel fuel injection equipment
No full textThe need to meet the US 2007 emissions legislation has necessitated a change in Diesel engine technology, particularly to the fuel injection equipment (FIE). At the same time as these engine technology changes, legislation has dictated a reduction in fuel sulphur levels and there has also been increased use of fatty acid methyl esters (FAME) or biodiesel as a fuel blending component. The combination of changes to the engine and the fuel has apparently led to a sharp rise in the number of reports of field problems resulting from deposits within the FIE. The problem is usually manifested as a significant loss of power or the engine failing to start. These symptoms are often due to deposits to be found within the fuel injectors or to severe fouling of the fuel filter. The characteristics of the deposits found within different parts of the fuel system can be noticeably different. A variety of analytical techniques have been investigated to gain knowledge of the characteristics of these different forms of deposit. Work has also been performed to characterise some of the fuels that may be causing the deposits.This paper concentrates on the characterisation of deposits found specifically in the fuel injectors. Deposits found within different parts of the injector have been analysed using, Gas Chromatography with Mass Spectrometry detection (GC/MS), Fourier Transform Infra-red analysis (FTIR), Inductively Coupled Plasma spectroscopy (ICP), Nuclear Magnetic Resonance spectroscopy (NMR) and elemental analysis. Fuel samples that have been associated with the deposit formation have also been analysed. The techniques discussed are high resolution mass spectrometry, and ICP. The results are also placed in context with previously published work on both filter and injector deposits
FIGURE 1 in Nine new species of Castiarina Gory & Laporte, 1838 (Coleoptera: Buprestidae)
No full textFIGURE 1. Photographs of male genitalia of Castiarina species: a. C. macarthuri sp. nov.b. C. turneri (Barker) c. C. setifera sp. nov. d. C. jacki sp. nov. e. C. mayoiana (Barker) f. C. purcellae sp. nov. g. C. keyzeri sp. nov. h. C. lycida sp. nov. i. C. suehasenpuschae sp. nov. j. C. inermis (Kerremans) k. C. quadriguttata (Macleay) l. C. allensundholmi sp. nov. Scale bar = 1 mm.Published as part of Barker, Shelley, 2005, Nine new species of Castiarina Gory & Laporte, 1838 (Coleoptera: Buprestidae), pp. 57-68 in Zootaxa 1062 on page 59, DOI: 10.5281/zenodo.27327
Measurement of the ratio of prompt χ c to J / ψ production in pp collisions at √s = 7 TeV
No full textThe prompt production of charmonium χ c and J / ψ states is studied in proton-proton collisions at a centre-of-mass energy of √s = 7 TeV at the Large Hadron Collider. The χ c and J / ψ mesons are identified through their decays χ c → J / ψ γ and J / ψ → μ + μ - using 36 pb - 1 of data collected by the LHCb detector in 2010. The ratio of the prompt production cross-sections for χ c and J / ψ, σ (χ c → J / ψ γ) / σ (J / ψ), is determined as a function of the J / ψ transverse momentum in the range 2 < p T J / ψ < 15 GeV / c. The results are in excellent agreement with next-to-leading order non-relativistic expectations and show a significant discrepancy compared with the colour singlet model prediction at leading order, especially in the low p T J / ψ region
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