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  • 1
    Electronic Resource
    Electronic Resource
    Kinetics of the shock wave pyrolysis of pentafluoroethane (1971)
    s.l. : American Chemical Society
    The @journal of physical chemistry 〈Washington, DC〉 75 (1971), S. 3493-3498 
    Details
    Source: ACS Legacy Archives
    Topics: Chemistry and Pharmacology , Physics
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1021/j100692a001
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  • 2
    Electronic Resource
    Electronic Resource
    Kinetics of the shock wave thermolysis of 1,1,2,2-tetrafluoroethane (1971)
    s.l. : American Chemical Society
    The @journal of physical chemistry 〈Washington, DC〉 75 (1971), S. 3195-3201 
    Details
    Source: ACS Legacy Archives
    Topics: Chemistry and Pharmacology , Physics
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1021/j100690a001
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  • 3
    Electronic Resource
    Electronic Resource
    Kinetic analysis of the shock wave decomposition of 1,1,1,2-tetrafluoroethane (1972)
    s.l. : American Chemical Society
    The @journal of physical chemistry 〈Washington, DC〉 76 (1972), S. 292-298 
    Details
    Source: ACS Legacy Archives
    Topics: Chemistry and Pharmacology , Physics
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1021/j100647a002
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  • 4
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    ATLANTIS - MODERN THEORIES AND ANCIENT TALES (1973)
    London : Periodicals Archive Online (PAO)
    History Today. 23:7 (1973:July) 503 
    Details
    ISSN: 0018-2753
    Topics: History
    URL: http://gateway.proquest.com/openurl?url_ver=Z39.88-2004&res_dat=xri:pao:&rft_dat=xri:pao:article:4109-1973-023-07-000008
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  • 5
    Electronic Resource
    Electronic Resource
    206/207PB isotopic ratios applied to particulate transport processes-North eastern Irish Sea (1994)
    Springer
    Aquatic ecology 28 (1994), S. 353-358 
    Details
    ISSN: 1573-5125
    Keywords: Irish Sea ; lead isotopic ratio ; lead ; suspended particulate matter ; pollution ; transport processes
    Source: Springer Online Journal Archives 1860-2000
    Topics: Biology
    Notes: Abstract Samples of suspended particulate matter (SPM) were collected from the north eastern Irish Sea, under different tidal conditions. The SPM was extracted with 1M HCl and concentrations of Pb and stable isotopic ratios of Pb (206/207Pb) determined using atomic absorption spectrometry and ICP-MS. Lead concentrations were found to be in the range 49 to 115 μg g−1 for spring tides and 72 to 148 μg g−1 for neap tides. The206/207Pb ratios, which were between 1.140 and 1.194, were used to establish possible sources of SPM during the tidal cycle. Samples of surface sediments from along the coastline showed evidence of anthropogenic Pb contamination in the vicinity of Liverpool Bay, with low206/207Pb ratios of about 1.144, which increased northwards away from the estuary. The results are discussed in terms of the tidally-induced transport of SPM in the coastal boundary zone of the Irish Sea.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF02334204
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  • 6
    Electronic Resource
    Electronic Resource
    Particle sources and trace element reactivity in the Humber plume (1994)
    Springer
    Aquatic ecology 28 (1994), S. 359-364 
    Details
    ISSN: 1573-5125
    Keywords: Particles ; trace elements ; reactivity ; North Sea
    Source: Springer Online Journal Archives 1860-2000
    Topics: Biology
    Notes: Abstract Samples of suspended particulate matter (SPM) collected from the Humber Estuary had higher concentrations of particulate metals than SPM from Holderness coastal waters (U.K.). Characterised SPM from both sources was used in laboratory experiments involving the uptake of radiotracer109Cd,137Cs,54Mn and65Zn. Kinetic experiments, over five days, showed that the rate and extent of uptake was highly dependent on particle type, with109Cd,54Mn and65Zn being more reactive with Humber Estuary particles than those from Holderness and137Cs having the opposite trend. Adsorption experiments were also carried out on suspensions in which SPM from the Humber Estuary and Holderness coastal water were mixed in various proportions. These experiments revealed that Kd for65Zn increased linearly with the proportion of Humber SPM, Kd for137Cs decreased linearly with increase in Humber SPM and Kd for54Mn and109Cd displayed non-linear behaviour. The results of the study were used to develop an algorithm for predicting the partition coefficients in the Humber Plume based on the extent of particle mixing from the two source regions. The use of206/207Pb ratios in determining the extent of particle mixing is discussed, along with the application of the algorithm to the modelling of particulate trace metal behaviour in the Humber-Wash coastal zone.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF02334205
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  • 7
    Electronic Resource
    Electronic Resource
    Seasonal variability in mercury inputs into the Ria de Aveiro, Portugal (1995)
    Springer
    Aquatic ecology 29 (1995), S. 291-296 
    Details
    ISSN: 1573-5125
    Keywords: mercury ; seasonal inputs ; sediments ; Ria de Aveiro
    Source: Springer Online Journal Archives 1860-2000
    Topics: Biology
    Notes: Abstract Water, suspended particulate matter (SPM) and sediments were collected from the Esteiro de Estarreja (Ria de Aveiro, Portugal), which receives considerable quantities of waste mercury from a chlor-alkali plant. Dissolved and particulate Hg concentrations in the effluent ranged between 4 –167 μg I−1 and 141–3144 μg g−1, respectively, at pH values of 〉10. The effluent plume undergoes significant chemical changes during advection downestuary. The evidence suggested that adsorption of dissolved Hg onto organic-rich SPM was an important process. A maximum sediment Hg concentration of 500 μg g−1 was found about 1.5 km from the discharge, as a result of the settling of Hg-rich SPM. Downestuary Hg concentrations in sediments decline to about 100 μg g−1 at the mouth of the Esteiro. The particle-water interactions are discussed in terms of the transport of dissolved and particulate Hg into the Ria de Aveiro.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF02084227
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  • 8
    Electronic Resource
    Electronic Resource
    Changes in benthic community structure following construction of a harbour impoundment scheme (1995)
    Springer
    Aquatic ecology 29 (1995), S. 449-457 
    Details
    ISSN: 1573-5125
    Keywords: Benthic macrofauna ; changes ; heavy metals ; harbour development ; MDS
    Source: Springer Online Journal Archives 1860-2000
    Topics: Biology
    Notes: Abstract Long-term monitoring (May 1990 – November 1994) of benthic macrofauna and sediment composition was undertaken to examine changes in community structure following the construction of a tidal barrage at the entrance to Sutton Harbour, Plymouth (South West England). The harbour has permanently anoxic sediments, below a depth of 3 cm, consisting mainly of silt with relatively high total metal concentrations in the m〈63 μm fraction for Cu (96 – 222 μg g−1), Hg (0.7 – 2.0 μg g−1), Pb (93 – 297 μg g−1) and Zn (114 – 460 μg g−1). Polychaete worms, particularly of the family Cirratulidae, dominated the 93 taxa that form the macrofauna of the fine sediments. Multi-dimensional scaling (MDS) identified significant changes, surpassing all seasonal variability, in benthic community structure between pre-construction and construction phases and the similarities percentages procedure (SIMPER) isolated the species differentiating pre- and post-construction samples. Principal components analysis (PCA) revealed changes in heavy metal concentrations and sediment size distribution, primarily between surveys encompassing the start of construction. Rank correlations between the biotic and abiotic similarity matrices (BIOENV) were highest for sediment Pb and Zn concentrations, indicating that these variables offered a potential explanation of the changes in community structure. The results demonstrate the sensitivity of the benthic community to man-induced change and the need for ecological factors to be accounted for in harbour development at other locations.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF02084243
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  • 9
    Electronic Resource
    Electronic Resource
    Methylated arsenic species in estuarine porewaters (1987)
    New York, NY [u.a.] : Wiley-Blackwell
    Applied Organometallic Chemistry 1 (1987), S. 427-433 
    Details
    ISSN: 0268-2605
    Keywords: Inorganic arsenic ; methylated arsenic ; porewaters ; dialysis membrane filtration ; hydride generation ; liquid nitrogen trapping ; coupled gas chromatography-atomic absorption spectroscopy ; arsenic methylation ; Chemistry ; Organic Chemistry
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Chemistry and Pharmacology
    Notes: Inorganic arsenic, monomethylarsenic and dimethylarsenic species have been observed in samples of sediment porewater collected from the Tamar Estuary in South-West England. Porewater samples were collected using in situ dialysis. The arsenic species were separated by hydride generation and concentrated by liquid nitrogen trapping, prior to analysis by directly coupled gas chromatography-atomic absorption spectroscopy. The predominant dissolved arsenic species present was inorganic arsenic (5-62 m̈g dm-3). However, this is the first time significant concentrations of methylated arsenic species have been quantified in estuarine porewaters (0.04-0.70 m̈g dm-3), accounting for between 1 and 4% of the total dissolved arsenic. The presence of methylated arsenic compounds in porewaters is attributed to in situ environmental methylation, although the possibility of methylated arsenic species being derived from biological debris cannot be excluded.
    Additional Material: 2 Ill.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1002/aoc.590010507
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  • 10
    Electronic Resource
    Electronic Resource
    Methylation of inorganic lead by Tamar Estuary (UK) sediments (1988)
    New York, NY [u.a.] : Wiley-Blackwell
    Applied Organometallic Chemistry 2 (1988), S. 87-90 
    Details
    ISSN: 0268-2605
    Keywords: Lead methylation ; inorganic lead ; estuarine sediments ; coupled gas chromatography-atomic absorption spectrophotometry (GC AA) ; Chemistry ; Organic Chemistry
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Chemistry and Pharmacology
    Notes: Tetramethyllead (TML) has been produced from inorganic lead salts using biologically active sediments and waters from the Tamar Estuary, S. W. England. The TML production was a two-stage process involving an initial lag phase of about 100 hours followed by the exponential appearance of TML, which amounted to about 0.03% of total added lead. The methylation process is discussed in the context of lead transport in estuaries.
    Additional Material: 2 Ill.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1002/aoc.590020113
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