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  • 1
    Electronic Resource
    Electronic Resource
    Equation of State for Molten Alkali Metals from Surface Tension. Part II (1998)
    Springer
    International journal of thermophysics 19 (1998), S. 331-340 
    Details
    ISSN: 1572-9567
    Keywords: alkali metals ; corresponding states ; equation of state ; surface tension
    Source: Springer Online Journal Archives 1860-2000
    Topics: Physics
    Notes: Abstract This work presents a new method for predicting the equation of state for molten alkali metals, based on statistical–mechanical perturbation theory from two scaling constants that are available from measurements at ordinary pressures and temperatures. The scaling constants are the surface tension and the liquid density at the boiling temperature (γb, ρb). Also, a reference temperature, T Ref, is presented at which the product (T Ref T b 1/2 ) is an advantageous corresponding temperature for the second virial coefficient, B 2(T). The virial coefficient of alkali metals cannot be expected to obey a law of corresponding states for normal fluids, because two singlet and triplet potentials are involved. The free parameter of the Ihm–Song–Mason equation of state compensates for the uncertainties in B 2(T). The vapor pressure of molten alkali metals at low temperatures is very low and the experimental data for B 2(T) of these metals are scarce. Therefore, an equation of state for alkali metals from the surface tension and liquid density at boiling temperature (γb, ρb) is a suitable choice. The results, the density of Li through Cs from the melting point up to several hundred degrees above the boiling temperature, are within 5%.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1023/A:1021475808271
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    Paper (German National Licenses)
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  • 2
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    An analytical equation of state for mercury (1997)
    Springer
    Details
    Publication Date: 1997-09-01
    Print ISSN: 0195-928X
    Electronic ISSN: 1572-9567
    Topics: Physics
    Published by Springer
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    PAPER CURRENT
  • 3
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    Assessing benthic health of hard substratum macrobenthic community using soft bottom indicators and their relationship with environmental condition (2018)
    Details
    Publication Date: 2021-05-19
    Description: This study aimed to assess ecological quality status of hard substratum macroinvertebrates communities of the Caspian Sea with three ecological indices and their relationship with environmental factors. For this purpose, benthic communities of the Caspian Sea basin were studied seasonally during 2014 in 8 sampling sites. Temperature, salinity, dissolved oxygen, pH, nitrate, nitrite, silicate and phosphate were measured as environmental factors. The benthic classification indices AMBI (AZTI Marine Biotic Index), M-AMBI (Multivariate AMBI) and BENTIX (BENthic IndeX) were applied to assess the ecological status of the studied area. Results showed low dissimilarity based on species composition and abundance among seasons, while all seasons discriminated clearly based on environmental factors. In addition, AMBI index was more successful to assess ecological health of hard substratum in the Caspian Sea basin than M-AMBI and BENTIX. Furthermore, AMBI showed high sensitivity to environmental variation. Results indicated that temperature, nitrate, silicate, phosphate and nitrite were the most important factors in the composition and abundance fluctuation of hard substratum macroinvertebrates communities, respectively
    Description: Published
    Keywords: Benthic health ; AMBI ; M-AMBI ; BENTIX ; Environmental factors ; Macrobenthic
    Repository Name: AquaDocs
    Type: Journal Contribution , Refereed
    Format: pp.641-656
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  • 4
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    Assessing benthic health of hard substratum macrobenthic community using soft bottom indicators and their relationship with environmental condition (2021)
    In:  http://aquaticcommons.org/id/eprint/25996 | 18721 | 2018-10-19 17:50:43 | 25996 | Iranian Fisheries Science Research Institute
    Details
    Publication Date: 2021-07-24
    Description: This study aimed to assess ecological quality status of hard substratum macroinvertebrates communities of the Caspian Sea with three ecological indices and their relationship with environmental factors. For this purpose, benthic communities of the Caspian Sea basin were studied seasonally during 2014 in 8 sampling sites. Temperature, salinity, dissolved oxygen; pH, nitrate, nitrite, silicate and phosphate were measured as environmental factors. The benthic classification indices AMBI (AZTI Marine Biotic Index), M-AMBI (Multivariate AMBI) and BENTIX (BENthic IndeX) were applied to assess the ecological status of the studied area. Results showed low dissimilarity based on species composition and abundance among seasons, while all seasons discriminated clearly based on environmental factors. In addition, AMBI index was more successful to assess ecological health of hard substratum in the Caspian Sea basin than M-AMBI and BENTIX. Furthermore, AMBI showed high sensitivity to environmental variation. Results indicated that temperature, nitrate, silicate, phosphate and nitrite were the most important factors in the composition and abundance fluctuation of hard substratum macroinvertebrates communities, respectively.
    Keywords: Ecology ; Iran ; Caspian Sea ; Benthic health ; AMBI ; M-AMBI ; BENTIX ; Environmental factors ; Macrobenthic
    Repository Name: AquaDocs
    Type: article , TRUE
    Format: application/pdf
    Format: application/pdf
    Format: 641-656
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