Role of ACC-deaminase and/or nitrogen fixing rhizobacteria in growth promotion of wheat (<Emphasis Type="Italic">Triticum aestivum</Emphasis> L.) under cadmium pollution     

Waseem Hassan  Safdar Bashir  Farhan Ali  Muhammad Ijaz  Mubshar Hussain  Julie David 《Environmental Earth Sciences》2016,75(3):267

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Could Crop Height Affect the Wind Resource at Agriculturally Productive Wind Farm Sites?     

Brian Vanderwende  Julie K. Lundquist 《Boundary-Layer Meteorology》2016,158(3):409-428

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Intercomparison of statistical and dynamical downscaling models under the EURO- and MED-CORDEX initiative framework: present climate evaluations     

Pradeebane Vaittinada Ayar  Mathieu Vrac  Sophie Bastin  Julie Carreau  Michel Déqué  Clemente Gallardo 《Climate Dynamics》2016,46(3-4):1301-1329

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Oyster Disease and Climate Change. Are Yearly Changes in Perkinsus marinus Parasitism in Oysters (Crassostrea virginica) Controlled by Climatic Cycles in the Gulf of Mexico?     

Eric N.  Powell  Julie D.  Gauthier  Elizabeth A.  Wilson  Alanna  Nelson  Roger R.  Fay James M.  Brooks 《Marine Ecology》1992,13(3):243-270

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Ichthyoplankton distribution and abundance in the Celtic Sea   总被引：1，自引：1，他引：1  

Horstman  Katherine R.; Fives  Julie M. 《ICES Journal of Marine Science》1994,51(4):447-460

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Climate change, reproductive performance and diet composition of marine birds in the southern California Current system, 1969–1997     

William J. Sydeman  Michelle M. Hester  Julie A. Thayer  Franklin Gress  Paige Martin  Joelle Buffa 《Progress in Oceanography》2001,49(1-4)

We studied the effects of low-frequency climate change on the reproductive performance of 11 species of marine bird in the southern California Current system, 1969–1997. Reproductive performance of Brown Pelican (Pelecanus occidentalis) and Double-crested Cormorant (Phalacrocrax auritus) in southern California demonstrated an increase in the 1970s and early 1980s, attributable to recovery from organochlorine contamination (primarily DDE). Brandt's Cormorant (Phalacrocorax penicillatus) in central California was the only species to demonstrate a secular increase in performance through time, a pattern that remains unexplained. Ashy Storm-petrel (Oceanodroma homochroa) and Pelagic Cormorant (Phalacrocorax pelagicus) demonstrated curvilinear patterns of change, with decreasing reproductive performance in the past decade. All other species including Western Gull (Larus occidentalis), Pigeon Guillemot (Cepphus columba), Xantus's Murrelet (Synthiloboramphus hypoleucus), Common Murre (Uria aalge), Cassin's Auklet (Ptychoramphus aleuticus) and Rhinoceros Auklet (Cerorhinca monocerata) showed diminishing reproductive performance through time. Patterns of change for the murre and auklets were not significant, presumably because of a lack of reproductive variation for these species, which display a conservative breeding effort (i.e. single-egg clutches). Changes in the birds' abilities to provision young and maintain chick survival during May–July each year appeared most closely related to overall changes in reproductive performance. Dietary change indicated a decline in use of juvenile rockfish (Sebastes spp.) by marine birds in central California. There was also significant interannual variability in consumption of juvenile rockfish and the euphausiid Thysanoessa spinifera. Patterns of change in marine bird reproductive performance were generally concordant between southern and central California after considering the period of recovery for Brown Pelican and Double-crested Cormorant. The decline in reproductive performance and changes in diet composition do not appear directly related to the polarity reversal of the Pacific Decadal Oscillation in 1976/1977. Instead, reproductive performance and dietary characteristics indicate substantial change in the late 1980s, suggesting another regime-shift at that time.  相似文献   

Zonal and seasonal variations in zooplankton community structure off the central Oregon coast, 1998–2000     

Julie E. Keister  William T. Peterson 《Progress in Oceanography》2003,57(3-4):341

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Enceladus' plume: Compositional evidence for a hot interior     

Dennis L. Matson  Julie C. Castillo  Torrence V. Johnson 《Icarus》2007,187(2):569-573

The combined observations of Saturn's moon Enceladus by the Cassini CAPS, INMS and UVIS instruments detected water vapor geysers in which were present molecular nitrogen (N₂), carbon dioxide (CO₂), methane (CH₄), propane (C₃H₈), acetylene (C₂H₂), and several other species, together with all of the decomposition products of water. We propose that the presence of N₂ in the plume indicates thermal decomposition of ammonia, and hence high temperatures in the interior of the moon (e.g., 500 to 800 K). Such an environment also appears to be suitable for the production of methane (CH₄) from carbon monoxide (CO), or carbon dioxide (CO₂). The presence of C₂H₂ and C₃H₈ strongly suggest that catalytic reactions took place within a very hot environment. The internal environment of Enceladus is inferred to be or have been favorable for aqueous, catalytic chemistry. This permits the synthesis of many complex organic compounds that could be detected in future Cassini observations.  相似文献   

Influence of redox conditions on the intensity of Mars crustal magnetic anomalies          下载免费PDF全文

Stefanie Brachfeld  Deepa Shah  Emily First  Julia Hammer  Julie Bowles 《Meteoritics & planetary science》2015,50(10):1703-1717

We evaluate the relationship between the intensity of remanent magnetization and fO₂ in natural and synthetic Mars meteorites. The olivine‐phyric shergottite meteorite Yamato 980459 (Y‐980459) and a sulfur‐free synthetic analog (Y‐98*) of identical major element composition were analyzed to explore the rock magnetic and remanence properties of a basalt crystallized from a primitive melt, and to explore the role of magmatic and alteration environment fO₂ on Mars crustal anomalies. The reducing conditions under which Y‐980459 is estimated to have formed (QFM‐2.5; Shearer et al. 2006) were replicated during the synthesis of Y‐98*. Y‐980459 contains pyrrhotite and chromite. Chromite is the only magnetic phase in Y‐98*. The remanence‐carrying capacity of Y‐980459 is comparable to other shergottites that formed in the fO₂ range of QFM‐3 to QFM‐1. The remanence‐carrying capacity of these low fO₂ basalts is 1–2 orders of magnitude too weak to account for the intense crustal anomalies observed in Mars's southern cratered highlands. Moderately oxidizing conditions of >QFM‐1, which are more commonly observed in nakhlites and Noachian breccias, are key to generating either a primary igneous assemblage or secondary alteration assemblage capable of acquiring an intense remanent magnetization, regardless of the basalt character or thermal history. This suggests that if igneous rocks are responsible for the intensely magnetized crust, these oxidizing conditions must have existed in the magmatic plumbing systems of early Mars or must have existed in the crust during secondary processes that led to acquisition of a chemical remanent magnetization.  相似文献   

Photochemistry of methane-water ices     

Robert Hodyss  Paul V. Johnson  Julie V. Stern  Jay D. Goguen  Isik Kanik 《Icarus》2009,200(1):338-156

We report a study on the broadband ultraviolet photolysis of methane-water ice mixtures, at low methane concentrations and temperatures relevant to the icy satellites of the outer Solar System. The photochemistry of these mixtures is dominated by the action of hydroxyl radicals on methane and the resulting products. This implies that, given sufficient exposure time, the methane will eventually be completely oxidized to carbon dioxide. The presence of methane inhibits the formation of hydrogen peroxide by serving as a trap for hydroxyl radicals. The distribution of photochemical products is broadly similar to that previously conducted using ion and electron sources, with some differences possibly attributable to the difference in radiation source. The results are applicable to a variety of icy bodies in the Solar System. On Enceladus, where methane mixed with water is measured in the plumes, methane in the surface ices is subject to oxidation and will eventually be converted to CO₂. The CH stretch feature detected in the VIMS spectra of the Enceladus surface ice suggests that methane is currently being supplied to the surface ice, likely from re-condensation of the plume gas.  相似文献