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  • GEOPHYSICS  (2)
  • PCR-denaturing gradient gel electrophoresis  (2)
  • Surface physics, nanoscale physics, low-dimensional systems  (2)
  • 1
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    Diversity of eukaryotic plankton of aquaculture ponds with Carassius auratus gibelio, using denaturing gradient gel electrophoresis (2018)
    Details
    Publication Date: 2021-05-19
    Description: PCR-denaturing gradient gel electrophoresis (DGGE) and canonical correspondence analysis (CCA) were used to explore the relationship between eukaryotic plankton community succession and environmental factors in two aquaculture pond models with gibel carp Carassius auratus gibelio. The main culture species of pond 1 were gibel carp and grass carp, and the combined density was 46224 fingerling/ha (gibel carp/grass carp/silver carp/bighead carp, 17:4:6:1). The main culture species of pond 2 was gibel carp, and the combined density was 37551 fingerling/ha (Gibel carp/silver carp/bighead carp, 52:1:1). Water samples were collected monthly. The results showed that the annual average concentrations of TP and PO4-P in pond 1were significantly higher than pond 2 (p〉0.05). The concentration of chlorophyll a (chl a) has no significantly difference between pond 1 and pond 2. DGGE profiles of 18S rRNA gene fragments from the two ponds revealed that the diversity of eukaryotic plankton assemblages was highly variable. 91 bands and 71 bands were detected in pond 1 and pond 2, respectively. The average Shannon–Wiener index of pond 1 was significantly higher than pond 2. Canonical correspondence analysis (CCA) revealed that temperature played a key role in the structure of the eukaryotic plankton community in both ponds, but the nutrient concentration did not affect it. Our results suggest that DGGE method is a cost-effective way to gain insight into seasonal dynamics of eukaryotic plankton communities in culture ponds, and the increase in the number of filter-feeding silver carp and bighead carp could increase the diversity of the eukaryotic plankton community.
    Description: Published
    Keywords: Genetics ; 18S rRNA genes ; PCR-denaturing gradient gel electrophoresis ; CCA ; Eukaryotic plankton community ; Environmental factors
    Repository Name: AquaDocs
    Type: Journal Contribution , Refereed
    Format: pp.1540-1555
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  • 2
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    Diversity of eukaryotic plankton of aquaculture ponds with Carassius auratus gibelio, using denaturing gradient gel electrophoresis (2021)
    In:  http://aquaticcommons.org/id/eprint/22971 | 18721 | 2018-06-08 21:26:05 | 22971 | Iranian Fisheries Science Research Institute
    Details
    Publication Date: 2021-07-12
    Description: PCR-denaturing gradient gel electrophoresis (DGGE) and canonical correspondence analysis (CCA) were used to explore the relationship between eukaryotic plankton community succession and environmental factors in two aquaculture pond models with gibel carp Carassius auratus gibelio. The main culture species of pond 1 were gibel carp and grass carp, and the combined density was 46224 fingerling/ha (gibel carp/grass carp/silver carp/bighead carp, 17:4:6:1). The main culture species of pond 2 was gibel carp, and the combined density was 37551 fingerling/ha (gibel carp/silver carp/bighead carp, 52:1:1). Water samples were collected monthly. The results showed that the annual average concentrations of TP and PO_4-P in pond 1 were significantly higher than pond 2 (p〉0.05). The concentration of chlorophyll a (chl a) has no significantly difference between pond 1 and pond 2. DGGE profiles of 18S rRNA gene fragments from the two ponds revealed that the diversity of eukaryotic plankton assemblages was highly variable. 91 bands and 71 bands were detected in pond 1 and pond 2, respectively. The average Shannon–Wiener index of pond 1 was significantly higher than pond 2. Canonical correspondence analysis (CCA) revealed that temperature played a key role in the structure of the eukaryotic plankton community in both ponds, but the nutrient concentration did not affect it. Our results suggest that DGGE method is a cost-effective way to gain insight into seasonal dynamics of eukaryotic plankton communities in culture ponds, and the increase in the number of filter-feeding silver carp and bighead carp could increase the diversity of the eukaryotic plankton community.
    Description: The corresponding author is Dong (not Liu, as shown on title page of article).
    Keywords: Aquaculture ; Biology ; Ecology ; 18S rRNA genes ; PCR-denaturing gradient gel electrophoresis ; CCA ; Eukaryotic plankton community ; Environmental factors ; Genetics ; China
    Repository Name: AquaDocs
    Type: article , TRUE
    Format: application/pdf
    Format: application/pdf
    Format: 1540-1555
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  • 3
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    Plasmon and coupled plasmon-phonon modes in graphene in the presence of a driving electric field (2014)
    American Physical Society (APS)
    Details
    Publication Date: 2014-05-30
    Description: Author(s): C. X. Zhao, W. Xu, H. M. Dong, and F. M. Peeters We present a theoretical study of the plasmon and coupled plasmon-phonon modes induced by intraband electron-electron interaction in graphene in the presence of driving dc electric field. We find that the electric field dependence of these collective excitation modes in graphene differs significantl... [Phys. Rev. B 89, 195447] Published Thu May 29, 2014
    Keywords: Surface physics, nanoscale physics, low-dimensional systems
    Print ISSN: 1098-0121
    Electronic ISSN: 1095-3795
    Topics: Physics
    Published by American Physical Society (APS)
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  • 4
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    Interplay between lattice dynamics and superconductivity in Nb_{3}Sn thin films (2013)
    American Physical Society (APS)
    Details
    Publication Date: 2013-07-27
    Description: Author(s): S. Couet, H. Peelaers, M. Trekels, K. Houben, M. Y. Hu, J. Y. Zhao, W. Bi, E. E. Alp, E. Menéndez, B. Partoens, F. M. Peeters, M. J. Van Bael, A. Vantomme, and K. Temst We investigate the link between superconductivity and atomic vibrations in Nb 3 Sn films with a thickness ranging from 10 to 50 nm. The challenge of measuring the phonon density of states (PDOS) of these films has been tackled by employing the technique of nuclear inelastic scattering by 119 Sn isotope... [Phys. Rev. B 88, 045437] Published Fri Jul 26, 2013
    Keywords: Surface physics, nanoscale physics, low-dimensional systems
    Print ISSN: 1098-0121
    Electronic ISSN: 1095-3795
    Topics: Physics
    Published by American Physical Society (APS)
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  • 5
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    Development of diapiric structures in the upper mantle due to phase transitions (1991)
    In:  Other Sources
    Details
    Publication Date: 2011-08-19
    Description: Solid-state phase transition in time-dependent mantle convection can induce diapiric flows in the upper mantle. When a deep mantle plume rises toward phase boundaries in the upper mantle, the changes in the local thermal buoyancy, local heat capacity, and latent heat associated with the phase change at a depth of 670 kilometers tend to pinch off the plume head from the feeding stem and form a diapir. This mechanism may explain episodic hot spot volcanism. The nature of the multiple phase boundaries at the boundary between the upper and lower mantle may control the fate of deep mantle plumes, allowing hot plumes to go through and retarding the tepid ones.
    Keywords: GEOPHYSICS
    Type: Science (ISSN 0036-8075); 252; 1836-183
    Format: text
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  • 6
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    Hard turbulent thermal convection and thermal evolution of the mantle (1993)
    In:  Other Sources
    Details
    Publication Date: 2019-08-28
    Description: Hard turbulent convection is investigated using laboratory experiments and numerical simulations. In Newtonian mantle convection, the appearance of disconnected plumes marks the transition from soft to hard turbulence. For non-Newtonian rheology, the transition to hard turbulence takes place at much lower Nusselt numbers than it does for Newtonian rheology. This has important ramifications for the mantle. Large curvatures are developed in the trajectories of non-Newtonian plumes in the hard turbulent regime, in contrast to the trajectories of Newtonian plumes. When phase transitions are considered, mantle convection tends to become more layered with increasing Rayleigh numbers. The manner of mantle convection might have changed with time from a layered to a more whole mantle type of flow. Superplume events could have been caused by catastrophic overturns associated with strong gravitational instabilities in the transition zone.
    Keywords: GEOPHYSICS
    Type: Journal of Geophysical Research (ISSN 0148-0227); 98; E3; p. 5355-5373.
    Format: text
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