58,628 research outputs found
Efficient preservation of young terrestrial organic carbon in sandy turbidity-current deposits
No full text© The Author(s), 2020. This article is distributed under the terms of the Creative Commons Attribution License. The definitive version was published in Hage, S., Galy, V. V., Cartigny, M. J. B., Acikalin, S., Clare, M. A., Grocke, D. R., Hilton, R. G., Hunt, J. E., Lintern, D. G., McGhee, C. A., Parsons, D. R., Stacey, C. D., Sumner, E. J., & Talling, P. J. Efficient preservation of young terrestrial organic carbon in sandy turbidity-current deposits. Geology, 48(9), (2020): 882-887, doi:10.1130/G47320.1.Burial of terrestrial biospheric particulate organic carbon in marine sediments removes CO2 from the atmosphere, regulating climate over geologic time scales. Rivers deliver terrestrial organic carbon to the sea, while turbidity currents transport river sediment further offshore. Previous studies have suggested that most organic carbon resides in muddy marine sediment. However, turbidity currents can carry a significant component of coarser sediment, which is commonly assumed to be organic carbon poor. Here, using data from a Canadian fjord, we show that young woody debris can be rapidly buried in sandy layers of turbidity current deposits (turbidites). These layers have organic carbon contents 10× higher than the overlying mud layer, and overall, woody debris makes up >70% of the organic carbon preserved in the deposits. Burial of woody debris in sands overlain by mud caps reduces their exposure to oxygen, increasing organic carbon burial efficiency. Sandy turbidity current channels are common in fjords and the deep sea; hence we suggest that previous global organic carbon burial budgets may have been underestimated.We thank C. Johnson, M. Lardie, A. Gagnon, A. McNichol, and the NOSAMS (National Ocean Sciences Accelerator Mass Spectrometry) team (Woods Hole Oceanographic Institution [WHOI], Massachusetts, USA) for their help with ramped oxidation system and isotopes. We thank the captain and crew of CCGS Vector. Support was provided by UK Natural Environment Research Council (NERC) grants NE/M007138/1 (to Cartigny) and NE/L013142/1 (to Talling), NE/P005780/1 and NE/P009190/1 (to Clare); a Royal Society Research Fellowship (to Cartigny); an International Association of Sedimentologists Postgraduate Grant and National Oceanography Centre Southampton–WHOI exchange program funds (to Hage); an independent study award from WHOI (to Galy); the Climate Linked Atlantic Sector Science (CLASS) program (NERC grant NE/R015953/1); and the European Research Council under the European Union’s Horizon 2020 research and innovation program (Grant 725955, to Parsons). We thank François Baudin, Xingqian Cui, editor James Schmitt, and three anonymous reviewers
The Idaho Forester - 1997 (Vol. 78)
No full textEditorial, by Stacey Wales 3 Memorial to Richard C. Konopacky, Submttted by Christine Moffit 4 Professor Arthur "Doc" Partridge Retires, by Joseph Ullfman 5 CFWR Welcomes Three New Faculty, by Snag staff 7 Feature Articles Timber Sale and Logging Agreements, by Rodertck D.]ohnson 10 The Role of Snow in Animal Evolution and Ecology, by Dennis Murray 12 Livestock: A Powerful Wildlife Management Tool, by Karen Launchbaugh 14 Roger Tory Peterson 1908-1996, by Nathan Burkepile 16 Poem: Finally Spring, by Dentse Ortiz 16 Fire Rejuvenates Midwestern Oak Savannas, by Rich Patterson 17 A Little History, by Col. Ancil D. Baker 18 What I Learned During Summer Vacation, by Dennis Sasse 20 Poem: Strictly Functional, by Denise Ortiz 22 Poem: An Idaho Perspective, by Ron McFarland 23 Departments Student Employment Survey Data 27 Forest Resources 28 Forest Products 29 Range Resources 30 Fishery Resources 31 Wildlife Resources 32 Resource Recreation and Tourism 33 Faculty & Staff 34 College Focus 1996-1997 Calendar of Events 42 1st Annual CFWR Open House, by Stacey Wales 43 CFWR Recognized by Vice President Gore, by Denise Orttz 44 1995 George H. Savage Excellence in Writing Contest Winners First Place: Sacred Ground, by Travis Wall 46 Second Place: Becoming an Ancient Culture, by Nancy Wright 48 Third Place: Living, Working and Playing in Bear Country, by Pamela J. Town 50 Outstanding Faculty & Staff Award Recipients, by Denise Oritz 53 Where Do We End Up? by Jennifer Jacobson 56 Alumni News, by Stacey Wales 57 CFWR Students 1996-1997 61 Student Organizations American Fisheries Society 66 Forest Products Club 67 Resource Recreation and Tourism Assodation 67 The Range Club 68 Logger Sports Club 68 Student Management Unit 69 Swu'nmp'twa 69 The Wildlife Society 70 Student Affairs Council 71 Xi Sigma Pi, Epsilon Chapter 71 The Idaho Forester 72 The Snag 72 Food for thought 73 In Memory 74 Thank You, Forester, by DelMar Jaquish 75 Poem: Whiteness, by George La Bar 76 Index to Advertisers 76 Poem: Hourly Prayers, by Denise Ortiz (back cover
A multi-stage genome-wide association study of bladder cancer identifies multiple susceptibility loci.
No full textWe conducted a multi-stage, genome-wide association study of bladder cancer with a primary scan of 591,637 SNPs in 3,532 affected individuals (cases) and 5,120 controls of European descent from five studies followed by a replication strategy, which included 8,382 cases and 48,275 controls from 16 studies. In a combined analysis, we identified three new regions associated with bladder cancer on chromosomes 22q13.1, 19q12 and 2q37.1: rs1014971, (P = 8 × 10⁻¹²) maps to a non-genic region of chromosome 22q13.1, rs8102137 (P = 2 × 10⁻¹¹) on 19q12 maps to CCNE1 and rs11892031 (P = 1 × 10⁻⁷) maps to the UGT1A cluster on 2q37.1. We confirmed four previously identified genome-wide associations on chromosomes 3q28, 4p16.3, 8q24.21 and 8q24.3, validated previous candidate associations for the GSTM1 deletion (P = 4 × 10⁻¹¹) and a tag SNP for NAT2 acetylation status (P = 4 × 10⁻¹¹), and found interactions with smoking in both regions. Our findings on common variants associated with bladder cancer risk should provide new insights into the mechanisms of carcinogenesis
"Closing the R&D Gap, Evaluating the Sources of R&D Spending"
No full textBoth spending and tax policies have been implemented in the United States with the goal of stimulating private sector research and development (R&D). Karier questions whether current R&D policy, especially the research and experimentation tax credit, can contribute to closing the gap between nondefense expenditures on R&D in the United States and such expenditures in other countries, such as Japan and Germany. He also explores possible changes to our current R&D policy to make it more effective.
Letter from C. D. Dawson, Tusayan Copper Mining and Smelting, to Carl Hayden
No full textLetter from C. D. Dawson to Carl Hayden urging him to consider the rights of miners and farmers when drawing up the boundaries for the proposed park
Decomposition, shrinkage and evolution with temperature of aligned hexagonal ferrite fibres
No full textThe decomposition, shrinkage and evolution of aligned gel fibres with the stoichiometric compositions for BaM, SrM and Co2Z were investigated over a range of temperatures. SrM and BaM began to form by 750 and 800°C respectively, giving pure SrM and BaM phases at 900 and 1000°C. The Z phase formed at 1250°C, and only after the full crystallisation of the M and Y phases at 1000°C. Pure phase fibres of all ferrites were produced from stoichiometric mixes, unlike standard ceramic preparations. The fibres shrank by up to 22-23% at 1200°C, with no loss of alignment, and were appeared sintered (∼97%) by this point. The formation of the M ferrite phases seemed to occur at unexpectedly high temperatures compared to previous work on bulk sol-gel M ferrites. Halides were retained in the fibre over 800°C, and ferrite formation was delayed until the halides were lost. © 2001 Acta Materialia Inc. Published by Elsevier Science Ltd. All rights reserved
The manufacture and characterisation of aligned fibres of the ferroxplana ferrites Co2Z, 0.67% CaO-doped Co2Z, Co2Y and Co2W
No full textGel fibres of Co2Z, 0.67% CaO-doped Co2Z, Co2Y and Co2W ferrite were blow spun from an aqueous inorganic sol and collected as an aligned tow blanket, with an alignment comparable to that found in commercial fibres. The fibres were then heated to produce the desired ceramic phases, characterised by various techniques and their ferromagnetic resonance spectra measured. Single phase Co2Z was found by X-ray diffraction to form at a relatively low temperature of between 1200°C and 1250°C, and the material exhibited the expected microwave properties. Furthermore, an addition of 0.67% CaO was found to promote the formation of Co2Z at an even lower temperature of below 1200°C and delay the exaggerated platy grain growth, which is normally encountered at the onset of formation of the Co2Z phase and which results in a mechanically weakened fibre. © 1998 Elsevier Science B.V. All rights reserved
Measurement of the D+/- production asymmetry in 7 TeV pp collisions
No full textThe asymmetry in the production cross-section \sigma of D+/- mesons, A_P = (\sigma(D+) - \sigma(D-))/(\sigma(D+) + \sigma(D-)), is measured in bins of pseudorapidity \eta and transverse momentum p_T within the acceptance of the LHCb detector. The result is obtained with a sample of D+ -> K_S pi+ decays corresponding to an integrated luminosity of 1.0 fb^-1, collected in pp collisions at a centre of mass energy of 7 TeV at the Large Hadron Collider. When integrated over the kinematic range 2.0 K_S pi+ decay is negligible. No significant dependence on \eta or p_T is observed
D* (D)over-bar* molecule interpretation of Z(c)(4025)
No full textWe have used QCD sum rules to study the newly observed charged state Z(c)(4025) as a hidden-charm D*(D) over bar* molecular state with the quantum numbers I-G(J(P)) =1(+)(1(+)). Using a D*(D) over bar* molecular interpolating current, we have calculated the two-point correlation function and the spectral density up to dimension eight at leading order in alpha(s). The extracted mass is m(X) = (4.04 +/- 0.24) GeV. This result is compatible with the observed mass of Z(c)(4025) within the errors, which implies a possible molecule interpretation of this new resonance. We also predict the mass of the corresponding hidden-bottom B*(B) over bar* molecular state: m(Zb) = (9.98 +/- 0.21) GeV.Physics, Particles & FieldsSCI(E)[email protected]; [email protected]; [email protected]; [email protected]
Antibiotic Resistance Monitoring and Detection (ARM-D™) PCR Kits: ARM-D™ for β-Lactamase ID – Technical Note
No full text6317-3185
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