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  • 1
    Electronic Resource
    Electronic Resource
    Springer
    Il nuovo cimento della Società Italiana di Fisica 15 (1993), S. 1489-1506 
    ISSN: 0392-6737
    Keywords: Liquid crystals
    Source: Springer Online Journal Archives 1860-2000
    Topics: Physics
    Notes: Summary The elastic deformations in nematic liquid crystals are analysed in one and two dimensions. The influence of the flexoelectric polarization on the elastic properties of the medium is studied. It is shown that for one-dimensional deformations, the presence of the flexoelectric polarization introduces a renormalization of the elastic constants. On the contrary in the bidimensional case, the effect of the flexoelectricity is not a simple renormalization of the elastic constants. The profiles of the electric potential and of the tilt angle are evaluated for the cases in which the substrate is an insulating or conducting material. The validity of the calculations is discussed by considering the value of Debye's screening length of the nematic liquid crystal.
    Type of Medium: Electronic Resource
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  • 2
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    Freshwater Biological Association | Windermere, UK
    In:  http://aquaticcommons.org/id/eprint/4805 | 1256 | 2011-09-29 15:52:22 | 4805 | Freshwater Biological Association
    Publication Date: 2021-07-06
    Description: The rhythm of division of 9 species belonging to different groups of algae were analysed in situ and in the laboratory. The research which developed in different environmental conditions attempted to establish the capacity for multiplication and assimilation of chlorophyll on the part of the algae under study with a view to placing them in a culture. The results obtained showed that the green multicellular algae (eg. Ulothrix) and the blue algae (eg. Lyngbya, Oscillatoria) are able to produce an appreciable quantity of dry matter, just as the unicellular algae. At the same time it arises that amongst the numerous factors of the environment, temperature plays one of the most important roles in the process of multiplication.
    Description: Translated from Romanian into English
    Keywords: Biology ; Limnology ; Algae ; Chlorophylls ; Cycles ; Phytoplankton ; Growth ; Salt lakes ; Romania ; Lake Sarat
    Repository Name: AquaDocs
    Type: monograph
    Format: application/pdf
    Format: application/pdf
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