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  • 1
    Electronic Resource
    Electronic Resource
    Mercury in the Calcasieu River/Lake Complex, Louisiana (1989)
    Springer
    Bulletin of environmental contamination and toxicology 42 (1989), S. 71-80 
    Details
    ISSN: 1432-0800
    Source: Springer Online Journal Archives 1860-2000
    Topics: Energy, Environment Protection, Nuclear Power Engineering , Medicine
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF01699206
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  • 2
    Electronic Resource
    Electronic Resource
    Variations of heavy metals and arsenic in fish and other organisms from the Calcasieu River and Lake, Louisiana (1989)
    Springer
    Archives of environmental contamination and toxicology 18 (1989), S. 804-818 
    Details
    ISSN: 1432-0703
    Source: Springer Online Journal Archives 1860-2000
    Topics: Energy, Environment Protection, Nuclear Power Engineering , Medicine
    Notes: Abstract The edible parts of several species of fish and other marine organisms inhabiting the Calcasieu River/Lake, Louisiana were analyzed for Cd, Cr, Cu, Pb, Hg, Ag, Zn, and As. Concentrations of all metals measured in both intra and interspecies showed no significant variation with sample location. Differences in elemental concentrations were related to organism mobility and not to site-specific variations in metal loadings. Different species of finfish contained only trace amounts of Cd (0.02-0.08), Ag (〈0.01–0.3), Pb (〈0.2–0.5), and As (〈0.1–0.3) mg kg−1. Concentrations of Cu and Cr were highly variable, in contrast to Zn, which was present in relatively constant amounts across all species (28 ± 7 mg kg−1). Sessile organisms such as oysters had the highest concentrations of heavy metals, including Cd. Periphyton and Zooplankton were the only groups that showed differences in metal concentrations with sampling location.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF01160294
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  • 3
    Electronic Resource
    Electronic Resource
    Thermal decomposition of potassium hexacyanoferrate(II) trihydrate (1978)
    Springer
    Journal of thermal analysis and calorimetry 14 (1978), S. 253-264 
    Details
    ISSN: 1572-8943
    Source: Springer Online Journal Archives 1860-2000
    Topics: Chemistry and Pharmacology
    Description / Table of Contents: Resumé Le ferrocyanure de potassium trihydraté, K4Fe(CN)6·3H2O, a été chauffé en présence d'oxygÊne dans un Derivatograph, dans des conditions bien déterminées de masse et de vitesse de chauffage. Le chauffage a été interrompu à diverses températures et les spectres Mössbauer ainsi que les diffractogrammes de rayons X ont été enregistrés aprÊs trempe du matériau à la température ambiante. On a étudié de cette faÇon le déroulement de la réaction; on décrit les avantages et les inconvénients de chacune de ces techniques. On a pu déceler la présence de K4Fe(CN)6,α-Fe2O3, Fe3O4 Fe3C, Fe, FeO, KFeO2,Β-FeOOH, KOCN, K2CO3 et KCN aux différentes étapes du traitement thermique.
    Abstract: Zusammenfassung Kaliumhexacyanoferrat(II)trihydrat, K4[Fe(CN)6.3H2O wurde unter kontrollierten Bedingungen in einem Derivatographen in Gegenwart von Sauerstoff erhitzt. Das Aufheizen wurde bei verschiedenen Temperaturen gestoppt und Mössbauer-Spektren, sowie Röntgendiffraktogramme aufgenommen. Der Reaktionsweg wurde auf diese Weise untersucht und die Vor- und Nachteile jeder der Techniken beschrieben. Bei den verschiedenen Stufen des thermischen Vorganges konnten K4[Fe(CN)6],α-Fe2O3, Fe3O4, Fe3C, Fe, FeO, KFeO2,Β-FeOOH, KOCN, K2CO3 und KCN nachgewiesen werden.
    Notes: Abstract Potassium hexacyanoferrate(II) trihydrate, K4Fe(CN)6·3H2O, was heated under controlled conditions of mass and rate in a derivatograph in the presence of oxygen. The heating was stopped at different temperatures and Mössbauer spectra and X-ray diffractograms were taken on the quenched material at room temperature. The reaction pathway was studied in this way and the advantages and drawbacks of each of the techniques are described. At different stages of the thermal process we were able to show the presence of K4Fe(CN)6,α-Fe2O3, Fe3O4, Fe3C, Fe, FeO, KFeO2,Β-FeOOH, KOCN, K2CO3 and KCN.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF01915163
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  • 4
    Electronic Resource
    Electronic Resource
    Heavy metal content of sediments in the Calcasieu River/Lake Complex, Louisiana (1990)
    Springer
    Hydrobiologia 192 (1990), S. 149-165 
    Details
    ISSN: 1573-5117
    Keywords: heavy metals ; sediments ; Calcasieu River/Lake ; Louisiana
    Source: Springer Online Journal Archives 1860-2000
    Topics: Biology
    Notes: Abstract The heavy metals Cd, Cr, Cu, Pb, Hg, Ag, and Zn, and the metalloid As were measured in surface sediments at permanent stations located in the Calcasieu River/Lake Complex. The relationships among metal concentrations in different areas of the system were investigated to determine sources, source strength, and transport. The point-source inputs of heavy metals were assumed to be industrial outfalls (Bayou d'Inde) and sewage outfalls (Bayou d'Inde and Contraband Bayou). Although these inputs have not seriously affected the entire river/lake system, stressed regions exist within each bayou. The background levels of arsenic and heavy metals were: 0.60 (As), 0.3 to 1.4 (Cd), 25 (Cr), 10 (Cu), 15 (Pb), 〈 0.05 (Hg), 0.07 (Ag), and 40 mg kg−1 (Zn). Stations near sewage outfalls and industrial outfalls had increased metal concentrations above these background levels, but the increases were restricted to the regions near the outfalls. The metals discharged into the bayous were not being transported to the remainder of the river/lake complex.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF00006011
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  • 5
    Electronic Resource
    Electronic Resource
    Spatial and temporal variation of heavy metals in sediment cores from the calcasieu river/lake complex (1989)
    Springer
    Water, air & soil pollution 43 (1989), S. 213-230 
    Details
    ISSN: 1573-2932
    Source: Springer Online Journal Archives 1860-2000
    Topics: Energy, Environment Protection, Nuclear Power Engineering
    Notes: Abstract Sediment cores were obtained from several locations in the Calcasieu River/Lake Complex (Lousiana), including Calcasieu Lake, Calcasieu River, two bayou tributaries, and Lake Charles, during the period from November 1983 to November 1985. The cores were analyzed for Cu, Zn, Cr, and Pb. The approximate sedimentation rate and a core chronology were determined by the use of 137Cs and 210Pb. The increase in metal concentrations after 1933, particularly along Bayou d'Inde where most industries are located, points to anthropogenic input of these metals to the system. The fact that metal concentrations tend to merge to a common value prior to 1940 throughout the system suggests that geological factors do not contribute to the observed variations in metal concentrations of heavy metals found in this area. The background concentrations of heavy metals found in this study for the Calcasieu River/Lake Complex were: Cu (10 mg kg−1), Cr (25 mg kg−1), Pb (8 mg kg−1), and Zn (40 mg kg−1), The main emphasis of the study focused along Bayou d'Inde due to the enhanced levels of heavy metals found.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF00279193
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  • 6
    Electronic Resource
    Electronic Resource
    Distribution of Al, V, and Mn in lichens across Calcasieu Parish, Louisiana (1987)
    Springer
    Water, air & soil pollution 33 (1987), S. 155-164 
    Details
    ISSN: 1573-2932
    Source: Springer Online Journal Archives 1860-2000
    Topics: Energy, Environment Protection, Nuclear Power Engineering
    Notes: Abstract The lichen Ramalina stenospora was collected from 16 location in Calcasieu Parish and from 2 locations in Cameron Parish in Southwestern Louisiana. The metals V, Mn, and Al were measured in lichen specimens collected during three seasons — fall 1983, winter and spring 1984. The metals were determined using thermal neutron activation analysis. Vanadium was found to range in concentration from 2.1 to 10 mg kg−1; and Al from 900 to 4500 mg kg−1. Metal concentration was found to decrease exponentially with distance outward from the industrial corridor. The major industries included were an Al plant, two refineries and five chemical plants mostly related to plastics production.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF00191384
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  • 7
    Electronic Resource
    Electronic Resource
    Hyperfine field determination for Wolframite (Fe,Mn)WO4 (1981)
    Springer
    Hyperfine interactions 10 (1981), S. 1013-1015 
    Details
    ISSN: 1572-9540
    Source: Springer Online Journal Archives 1860-2000
    Topics: Physics
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF01022046
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  • 8
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    Uncertainty analysis for seismic hazard in Northern and Central Italy (2006)
    Details
    Publication Date: 2019-11-04
    Description: In this study we examine uncertainty and parametric sensitivity of Peak Ground Acceleration (PGA) and 1-Hz Spectral Acceleration (1-Hz SA) in probabilistic seismic hazard maps (10% probability of exceedance in 50 years) of Northern and Central Italy. The uncertainty in hazard is estimated using a Monte Carlo approach to randomly sample a logic tree that has three input-variables branch points representing alternative values for bvalue, maximum magnitude (Mmax) and attenuation relationships. Uncertainty is expressed in terms of 95% confidence band and Coefficient Of Variation (COV). The overall variability of ground motions and their sensitivity to each parameter of the logic tree are investigated. The largest values of the overall 95% confidence band are around 0.15 g for PGA in the Friuli and Northern Apennines regions and around 0.35 g for 1-Hz SA in the Central Apennines. The sensitivity analysis shows that the largest contributor to seismic hazard variability is uncertainty in the choice of ground-motion attenuation relationships, especially in the Friuli Region (∼0.10 g) for PGA and in the Friuli and Central Apennines regions (∼0.15 g) for 1-Hz SA. This is followed by the variability of the b-value: its main contribution is evident in the Friuli and Central Apennines regions for both 1-Hz SA (∼0.15 g) and PGA (∼0.10 g). We observe that the contribution of Mmax to seismic hazard variability is negligible, at least for 10% exceedance in 50-years hazard. The overall COV map for PGA shows that the uncertainty in the hazard is larger in the Friuli and Northern Apennine regions, around 20-30%, than the Central Apennines and Northwestern Italy, around 10-20%. The overall uncertainty is larger for the 1-Hz SA map and reaches 50- 60% in the Central Apennines and Western Alps.
    Description: JCR Journal
    Description: open
    Keywords: seismic hazard ; uncertainty analysis ; Italy ; 04. Solid Earth::04.06. Seismology::04.06.11. Seismic risk
    Repository Name: Istituto Nazionale di Geofisica e Vulcanologia (INGV)
    Type: article
    Format: 4778301 bytes
    Format: application/pdf
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  • 9
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    Electron-Hole Tunneling Revealed by Quantum Oscillations in the Nodal-Line Semimetal HfSiS (2018)
    American Physical Society
    Details
    Publication Date: 2018-12-18
    Print ISSN: 0031-9007
    Electronic ISSN: 1079-7114
    Topics: Physics
    Published by American Physical Society
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  • 10
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    Increasing seismicity in the U. S. midcontinent: Implications for earthquake hazard (2015)
    Society of Exploration Geophysicists (SEG)
    Details
    Publication Date: 2015-06-03
    Description: Earthquake activity in parts of the central United States has increased dramatically in recent years. The space-time distribution of the increased seismicity, as well as numerous published case studies, indicates that the increase is of anthropogenic origin, principally driven by injection of wastewater coproduced with oil and gas from tight formations. Enhanced oil recovery and long-term production also contribute to seismicity at a few locations. Preliminary hazard models indicate that areas experiencing the highest rate of earthquakes in 2014 have a short-term (one-year) hazard comparable to or higher than the hazard in the source region of tectonic earthquakes in the New Madrid and Charleston seismic zones.
    Print ISSN: 1070-485X
    Electronic ISSN: 1938-3789
    Topics: Geosciences
    Published by Society of Exploration Geophysicists (SEG)
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