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    The Mechanics of Axially Symmetric Liposomes

    Source: Journal of Biomechanical Engineering:;1993:;volume( 115 ):;issue: 002::page 149
    Author:
    D. C. Pamplona
    ,
    C. R. Calladine
    DOI: 10.1115/1.2894115
    Publisher: The American Society of Mechanical Engineers (ASME)
    Abstract: Hotani has filmed morphological transformations in unilamellar liposomes, starting from a spherical shape, when the interior volume decreases steadily. Hotani’s liposomes showed no evidence of general thermal fluctuations. We use a finite-deformation theory of axisymmetric, quasi-static thin shells to analyze theoretically bifurcations and changes of shape in liposomes under decreasing volume. The main structural action in a lipid bilayer is generally agreed to be its elastic resistance to bending, and it is usual to regard surface deformation as being like that of a two-dimensional liquid. We find, however, that some in-plane shear elasticity is also needed in order to produce the observed post-bifurcation behavior. Such an elasticity would be difficult to measure directly.
    keyword(s): Elasticity , Deformation , Electrical resistance , Surface deformation , Fluctuations (Physics) , Shear (Mechanics) , Bifurcation , Lipid bilayers , Shapes AND Thin shells ,
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      The Mechanics of Axially Symmetric Liposomes

    URI
    http://yetl.yabesh.ir/yetl1/handle/yetl/111575
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    • Journal of Biomechanical Engineering

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    contributor authorD. C. Pamplona
    contributor authorC. R. Calladine
    date accessioned2017-05-08T23:40:44Z
    date available2017-05-08T23:40:44Z
    date copyrightMay, 1993
    date issued1993
    identifier issn0148-0731
    identifier otherJBENDY-25897#149_1.pdf
    identifier urihttp://yetl.yabesh.ir/yetl/handle/yetl/111575
    description abstractHotani has filmed morphological transformations in unilamellar liposomes, starting from a spherical shape, when the interior volume decreases steadily. Hotani’s liposomes showed no evidence of general thermal fluctuations. We use a finite-deformation theory of axisymmetric, quasi-static thin shells to analyze theoretically bifurcations and changes of shape in liposomes under decreasing volume. The main structural action in a lipid bilayer is generally agreed to be its elastic resistance to bending, and it is usual to regard surface deformation as being like that of a two-dimensional liquid. We find, however, that some in-plane shear elasticity is also needed in order to produce the observed post-bifurcation behavior. Such an elasticity would be difficult to measure directly.
    publisherThe American Society of Mechanical Engineers (ASME)
    titleThe Mechanics of Axially Symmetric Liposomes
    typeJournal Paper
    journal volume115
    journal issue2
    journal titleJournal of Biomechanical Engineering
    identifier doi10.1115/1.2894115
    journal fristpage149
    journal lastpage159
    identifier eissn1528-8951
    keywordsElasticity
    keywordsDeformation
    keywordsElectrical resistance
    keywordsSurface deformation
    keywordsFluctuations (Physics)
    keywordsShear (Mechanics)
    keywordsBifurcation
    keywordsLipid bilayers
    keywordsShapes AND Thin shells
    treeJournal of Biomechanical Engineering:;1993:;volume( 115 ):;issue: 002
    contenttypeFulltext
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