Galaxy formation using halo merger histories taken from N-body simulations     

John C. Helly _&#;  Shaun Cole  Carlos S. Frenk  Carlton M. Baugh  rew Benson  Cedric Lacey 《Monthly notices of the Royal Astronomical Society》2003,338(4):903-912

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Multi-object near-infrared Hα spectroscopy of z∼ 1 star-forming galaxies in the Hubble Deep Field North     

Michelle Doherty  rew Bunker  Robert Sharp  Gavin Dalton  Ian Parry  Ian Lewis  Emily MacDonald  Christian Wolf  Hans Hippelein 《Monthly notices of the Royal Astronomical Society》2004,354(1):L7-L12

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Analytical predictions for statistics of cosmic shear: tests against simulations     

Patrick Valageas  rew J. Barber  Dipak Munshi 《Monthly notices of the Royal Astronomical Society》2004,347(2):654-666

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Results from the Wide-Angle Search for Planets prototype (WASP0) – I. Analysis of the Pegasus field     

Stephen R. Kane  rew Collier Cameron  Keith Horne  David James  Tim A. Lister  Don L. Pollacco  Rachel A. Street  Yiannis Tsapras 《Monthly notices of the Royal Astronomical Society》2004,353(2):689-696

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Jurassic planktonic foraminifera from the United Kingdom     

Melissa J. Oxford  F. JohnGregory  Malcolm B. Hart  rew S. Henderson  Michael D. Simmons  & Matthew P. Watkinson 《地学学报》2002,14(3):205-209

Unequivocal planktonic foraminifera have been discovered in Oxfordian strata from Dorset and Scotland. These assemblages are, in part, coeval with previously reported occurrences of planktonic taxa in the Oxfordian of Normandy and Seine Maritime (France). Three species are now reported from the United Kingdom for the first time: Globuligerina oxfordiana ( Grigelis, 1958 ), Haeuslerina helvetojurassica ( Haeusler, 1881 ) and Compactogerina sp. cf. C. stellapolaris ( Grigelis, 1977 ). There appears to be a close relationship between the distribution of these planktonic taxa in the UK and a marked sea-level highstand.  相似文献   

Redating the advance of the New Zealand Franz Josef Glacier during the Last Termination: evidence for asynchronous climate change     

C.S.M. Turney  R.G. Roberts  N. de Jonge  C. Prior  J.M. Wilmshurst  M.S. McGlone  J. Cooper 《Quaternary Science Reviews》2007,26(25-28):3037-3042

Dating climatic and environmental records with accuracy and precision is critical if we are to robustly test hypotheses of synchronous change between the hemispheres. In the southern hemisphere, the advance of the New Zealand Franz Josef Glacier to the Waiho Loop terminal moraine has been used as evidence of synchronous global change during the Younger Dryas Chronozone. However, radiocarbon ages for wood incorporated into the sediments associated with the advance span an interval of 900 years. Here we demonstrate that weathered ‘old’ wood was incorporated into the deposit prior to, or during, the advance, and that this material is highly susceptible to contamination by young carbon, resulting in the wide range of age estimates reported previously. We have identified material with little evidence of reworking (well-preserved wood with bark attached) that provides a statistically robust mean radiocarbon age of 11,062±30 BP (13.1 ka) for the advance of the Franz Josef Glacier. The timing of this event falls within the later part of the Antarctic Cold Reversal. Comparison with local, regional and global records suggests that cold conditions in the Southern Ocean were probably experienced in New Zealand at this time, driving the glacial advance.  相似文献   

Combining the use of gradients and reference areas to study bioaccumulation in wild oysters in the Hunter River estuary, New South Wales, Australia     

Lincoln-Smith MP  Cooper TF 《Marine pollution bulletin》2004,48(9-10):873-883

Two approaches for measuring the effects of human activities on aquatic biota are gradient studies and comparison of impacted areas to external references. Wild oysters were sampled at 12 sites adjacent to, upstream and downstream of a steelworks in the Hunter River estuary and in two reference estuaries. Regression analyses for the Hunter indicated reduced concentrations with distance from the point source for some metals and PAHs. Data compared from the reference estuaries to the two sites nearest and the two furthest from the point source in the Hunter indicated elevated concentrations of contaminants both near the point source and on an estuary-wide basis. The gradient approach was useful in identifying the industrial effluent as a point source for bioavailable chemicals. Combining this with the use of reference estuaries provided a broad geographic context in which to interpret results from the Hunter and identified estuary-wide effects.  相似文献   

Probing the Fundamental Physics of the Solar Corona with Lunar Solar Occultation Observations     

S. Rifai Habbal  H. Morgan  M. Druckmüller  A. Ding  J. F. Cooper  A. Daw  E. C. Sittler Jr. 《Solar physics》2013,285(1-2):9-24

Imaging and spectroscopy of the solar corona, coupled with polarimetry, are the only tools available at present to capture signatures of physical processes responsible for coronal heating and solar wind acceleration within the first few solar radii above the solar limb. With the recent advent of improved detector technology and image processing techniques, broad-band white light and narrow-band multi-wavelength observations of coronal forbidden lines, made during total solar eclipses, have started to yield new views about the thermodynamic and magnetic properties of coronal structures. This paper outlines these unique capabilities, which until present, have been feasible primarily with observations during natural total solar eclipses. This work also draws attention to the exciting possibility of greatly increasing the frequency and duration of solar eclipse observations with Moon orbiting observatories utilizing lunar limb occultation of the solar disk for coronal measurements.  相似文献   

Methods for reactive oxygen species (ROS) detection in aqueous environments     

Justina M. Burns  William J. Cooper  John L. Ferry  D. Whitney King  Brian P. DiMento  Kristopher McNeill  Christopher J. Miller  William L. Miller  Barrie M. Peake  Steven A. Rusak  Andrew L. Rose  T. David Waite 《Aquatic Sciences - Research Across Boundaries》2012,74(4):683-734

This review summarizes direct and indirect analytical methods for the detection and quantification of the reactive oxygen species (ROS): ¹O₂, O ₂ ^·? /HOO·, H₂O₂, HO·, and CO ₃ ^·? in aqueous solution. Each section briefly describes the chemical properties of a specific ROS followed by a table (organized alphabetically by detection method, i.e., absorbance, chemiluminescence, etc.) summarizing the nature of the observable (associated analytical signal) for each method, limit of detection, application notes, and reaction of the probe molecule with the particular ROS.  相似文献   

A bioindicator system for water quality on inshore coral reefs of the Great Barrier Reef     

Fabricius KE  Cooper TF  Humphrey C  Uthicke S  De'ath G  Davidson J  LeGrand H  Thompson A  Schaffelke B 《Marine pollution bulletin》2012,65(4-9):320-332

Responses of bioindicator candidates for water quality were quantified in two studies on inshore coral reefs of the Great Barrier Reef (GBR). In Study 1, 33 of the 38 investigated candidate indicators (including coral physiology, benthos composition, coral recruitment, macrobioeroder densities and FORAM index) showed significant relationships with a composite index of 13 water quality variables. These relationships were confirmed in Study 2 along four other water quality gradients (turbidity and chlorophyll). Changes in water quality led to multi-faceted shifts from phototrophic to heterotrophic benthic communities, and from diverse coral dominated communities to low-diversity communities dominated by macroalgae. Turbidity was the best predictor of biota; hence turbidity measurements remain essential to directly monitor water quality on the GBR, potentially complemented by our final calibrated 12 bioindicators. In combination, this bioindicator system may be used to assess changes in water quality, especially where direct water quality data are unavailable.  相似文献