2,758 research outputs found
Prince Edward Island in the 'Age of Discovery': an exhibition of maps and engravings from the collection of James W. MacNutt
No full texttext by Boyde Beck and Edward MacDonald.; Catalogue of an exhibition held 13 September to 25 October, 1992, Confederation Centre Art Gallery and Musuem.; Front and back cover illustration of map "Nova Scotia Drawn from Surveys By T Kitching"
The Dragonflies and Damselflies (Odonata) of the Holden Arboretum, Lake and Geauga Counties, Ohio
No full textAuthor Institution: Memorial School, Mentor, OhioPERRY, T. EDWARD, The dragonflies and damselflies (Odonata) of the Holden Arboretum, Lake and Geauga Counties, Ohio. Ohio J. Sci. 75(1): 14, 1975
The complaint: or, night-thoughts [electronic resource] : on life, death, and immortality. To which is prefixed The life of the author.
No full textAnonymous. By Edward Young.The life of the author is by George Wright.With a final, paginated advertisement leaf.Final leaf = Z2 (reported by E)Electronic reproduction.English Short Title Catalog,Reproduction of original from British Library
Experimental and theoretical constraints on lithium isotope fractionation during brine evaporation and halite precipitation
No full textMarine evaporitic halite, precipitating from the advanced stage of extremely evaporated seawater, is the most common
7 and abundant evaporitic mineral. The extent to which lithium (Li) is incorporated into evaporitic halite during geo8
logical periods of massive halite deposition, and the mechanisms of incorporation, are both unknown. These are each
9 important, however, for the quantification of the isotope effect of the evaporitic sink on δ7Liseawater, and for the poten10
tial use of halite as a recorder of seawater δ7Li. Here, new experimental data are presented for the Li fractionation
11 factor for halite from an isothermal evaporation experiment (25◦C for 100 days) using marine-derived brine, compara12
ble in composition to Phanerozoic CaCl2 oceans. The resultant solids were characterized by X-ray diffraction (XRD)
13 and scanning electron microscopy (SEM) to confirm the mineralogy and crystallinity of the product. Our results show
14 that Li isotopes are not constant during the evaporation process implying that there must be a process that fractionates
15 Li isotopes during halite precipitation. We suggest that this results from Li ionic substitution for sodium (Na) in crys16
talline halite, a scenario supported by ab-initio calculations, but we also show that Li within halite is predominantly
17 present within fluid inclusions. Thus, the Li isotopic composition of halite is controlled by a mixture of Li within the
18 fluid inclusions and Li that is incorporated into the halite crystal. Overall, the brine becomes enriched in 7Li during
19 evaporation due to the preferential incorporation of 6Li into chloride precipitates, and the evolution of δ7Librine is con20
trolled by the precipitated mineral assemblage. The theoretical equilibrium fractionation factor 1000lnα(mineral−f luid)
21 is -7.8 ‰ for Li-halite (LiNa26Cl27) at 25 ◦C at equilibrium, which is at the lower limit of Li isotope fractionation
22 factors. Rayleigh fractionation models were fitted to the experimental data yielding a fractionation factor of -25 ± 3
23 ‰. The difference in Li isotope fractionation factor between brine and structurally bound Li may result from kinetic
24 fractionation effects. This study presents a scenario highlighting that extensive halite deposits, formed over geological
25 time, could potentially impact the δ7Li values of seawater during that period, and place constraints on their utility as
26 an archive for δ7Liseawater
Partitioning riverine sulfate sources using oxygen and sulfur isotopes: Implications for carbon budgets of large rivers
No full textThe weathering of carbonate rocks with sulfuric acid releases carbon dioxide (CO2) to the atmosphere, offsetting the CO2 drawdown from carbonic acid weathering of silicates thought to regulate global climate. Quantifying CO2 release from sulfuric acid weathering requires the partitioning of riverine sulfate between its two main sources: sedimentary sulfate and sulfide. Although the sulfur ( δ 34 S S O 4 ) and oxygen ( δ 18 O S O 4 ) isotope ratios of sedimentary sulfates (gypsum and anhydrite) of different ages are well constrained, the δ 34 S of sulfide minerals is highly variable, restricting the utility of δ 34 S for partitioning sulfur sources. Here, we use oxygen isotope ratios in the river water ( δ 18 O H 2 O ) and sulfate molecules ( δ 18 O S O 4 ) to partition the fraction of sulfate and associated uncertainty delivered by the oxidative weathering of pyrite ( f pyr ). The partitioning is illustrated using the Mekong River, one of the world's largest river basins, presenting new δ 18 O S O 4 , δ 18 O H 2 O and δ 34 S S O 4 data collected on 18 tributaries and 6 mainstem sites over two field seasons at peak flux. The geological, geomorphological and climatic diversity of the Mekong River basin make it an ideal field site to quantify the role of sulfuric acid weathering and its implications for the carbon cycle. There is a 12‰ range in both the difference between δ 18 O S O 4 and δ 18 O H 2 O ( Δ 18 O S O 4 − H 2 O ) and δ 34 S in the river waters of the basin. In the Mekong tributaries, sources of sulfate are highly variable with the fraction of sulfate derived from pyrite oxidation ( f pyr ) ranging from 0.19 to 0.84. In the mainstem, f pyr reflects the flux-weighted mean of these tributary inputs, with 56 ± 7 % (1σ) of the sulfate delivered to the ocean at the Mekong mouth being derived from the oxidative weathering of pyrite. As a result, we estimate that ∼70% of CO2 consumed through silicate weathering in the Mekong basin is offset by the release of CO2 via the dissolution of carbonates by sulfuric acid
The solo songs of Edward MacDowell : an examination of style and literary influence
No full textEdward MacDowell is widely recognized as America's first great native-born composer. His music has come to be characterized as being extremely lyrical and harmonically inventive. Solo songs constitute an overlooked area of MacDowell's output and no serious study has been undertaken of them to date. The goal of this dissertation is to obtain a more complete portrait of MacDowell through a detailed examination of his songs.Previously unstudied manuscripts and sketches from the MacDowell Collection of the Library of Congress provide important insights into his songwriting process. The choice of text proved to be such an important determinant in MacDowell's settings that the author has chosen to divide the songs into three stylistic groupings based primarily on MacDowell's selection of texts rather than on chronology.In MacDowell's first-period songs, he concentrated on setting German texts while living in Germany from 1880 to 1888. Poetry by Heine, Goethe, and Klopstock plays an important role in these songs, which are stylistically similar to the nineteenth-century Lied. Chromatic harmonies, frequent modulations, and active piano accompaniments characterize these songs.MacDowell's second-period songs, written between 1886 and 1890, use English texts and differ markedly from the earlier Lieder. While many of their texts (and consequently, best songs of this group show the development of MacDowell's characteristic harmonic language and lyricism.The second-period songs serve as a transition into MacDowell's final songwriting period (c. 1893-1901), during which he wrote his most successful works. The third-period songs are delineated by the use of original poetry and represent a synthesis of the first two periods. The chromaticism and active piano parts of the lieder are combined with the new lyricism of the second-period songs.Songwriting spans MacDowell's entire career and is evidence of the seriousness with which he viewed the medium. A thorough study of the songs, both published and unpublished, reveals a steady line of development throughout MacDowell's career, with many musical advances predicated by the text. This development, which closely mirrors similar advances in the piano music, is an important factor in MacDowell's entire creative output.Thesis (D.A.
Trichinella spiralis in sylvatic hosts from Prince Edward Island
No full textLarvae of Trichinella sp. were found in two of 208 red foxes (Vulpes vulpes) and one of 125 coyotes (Canis latrans) obtained from trappers from Prince Edward Island (Canada) in 1995 and 1996. A polymerase chain reaction based DNA biotyping method revealed the larvae to be isolates of Trichinella spiralis. This is the first verified identification of T. spiralis in sylvatic hosts from Canada.LR: 20031114; PUBM: Print; JID: 0244160; ppublishSource type: Electronic(1
The effect of high air and water temperature on juvenile Mytilus edulis in Prince Edward Island, Canada
No full textMussel aquaculture on Prince Edward Island (PEI), Canada, is an important but relatively new industry. Although seed manipulation using hatcheries for mussel culture occurs on the west coast of North America, seed supply on the east coast of Canada, including Prince Edward Island (PEI), is based solely on wild collection. Two techniques for culling seed ( http://upei-resolver.asin-risa.ca?sid=SP:CABI&id=pmid:&id=&issn=0044-8486&isbn=&volume=243&issue=1%2f4&spage=185&pages=185-194&date=2005&title=Aquaculture%20&atitle=The%20effect%20of%20high%20air%20and%20water%20temperature%20on%20juvenile%20Mytilus%20edulis%20in%20Prince%20Edward%20Island%2c%20Canada.&aulast=LeBlanc&pid=%3Cauthor%3ELeBlanc%2c%20N%3bLandry%2c%20T%3bStryhn%2c%20H%3bTremblay%2c%20R%3bMcNiven%2c%20M%3bDavidson%2c%20J%3C%2Fauthor%3E%3CAN%3E20053018734%3C%2FAN%3E%3CDT%3EJournal%20article%3C%2FDT%3
Development of longline mussel farming and the influence of sleeve spacing in Prince Edward Island, Canada
No full textThis paper describes the historical development of blue mussel (Mytilus edulis) farming in Tracadie Bay (Prince Edward Island, Canada) and relates the spacing of suspended sleeves (SS) on longlines to seston uptake. From 1990 to 2001, mussel biomass in Tracadie Bay increased by a factor of four (from 1137 to 4743 t). By 2001, seston uptake rates were approximately three-fold water renewal rates, and harvest yields (kg sleeve−1) were significantly lower than in the early 1990s. A one-year field experiment was carried out to determine whether a change in SS could restore harvest yields. We found that SS (10, 20, 40, 60, 80 cm) had no significant effect on the condition index of mussels. However, high SS positively affected shell growth and abundance for small seeds that were densely packed within sleeves. A complete husbandry shift toward high SS and high seeding densities (within sleeves) may enhance farm productivity (production per unit of effort) and curtail seston uptake at the bay scale
Georgia’S Banks: The Impact of Regulatory Stabilization Efforts
No full textAuthor\u27s biography: Edward H. Sibbald is the BB&T executive in residence in banking, College of Business Administration, Georgia Southern University and director of the college’s Center for Excellence in Financial Services. Contact him at [email protected]
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