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    Passive Deformations and Active Motions of Leukocytes

    Source: Journal of Biomechanical Engineering:;1990:;volume( 112 ):;issue: 003::page 295
    Author:
    Richard Skalak
    ,
    Cheng Dong
    ,
    Cheng Zhu
    DOI: 10.1115/1.2891187
    Publisher: The American Society of Mechanical Engineers (ASME)
    Abstract: The purpose of this paper is to review the development of continuum mechanics models of single leukocytes in both passive deformations and active motions and to indicate some future directions. Models of passive deformations describe the overall rheological behavior of single leukocytes under externally applied forces and predict the average mechanical properties from experimental data. Various “apparent” viscoelastic coefficients are obtained depending on the models assumed and the types of test used. Models of spontaneous motions postulate active driving mechanisms which must be derived internally from the cell itself and probably have different bases for different kind of motions. For pseudopod protrusion on leukocytes, energy transduction from chemical potential to mechanical work associated with actin polymerization at the tip of the projection is assumed to supply the motive power. For pseudopod retraction, active contraction due to actin-myosin interaction is assumed to be the driving force. The feasibility of the hypotheses are tested via numerical examples and comparison of the theoretical results with experimental measurements.
    keyword(s): Motion , Deformation , Leukocytes , Force , Mechanisms , Measurement , Continuum mechanics , Mechanical properties , Chemical potential AND Polymerization ,
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      Passive Deformations and Active Motions of Leukocytes

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    http://yetl.yabesh.ir/yetl1/handle/yetl/106570
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    contributor authorRichard Skalak
    contributor authorCheng Dong
    contributor authorCheng Zhu
    date accessioned2017-05-08T23:32:03Z
    date available2017-05-08T23:32:03Z
    date copyrightAugust, 1990
    date issued1990
    identifier issn0148-0731
    identifier otherJBENDY-25860#295_1.pdf
    identifier urihttp://yetl.yabesh.ir/yetl/handle/yetl/106570
    description abstractThe purpose of this paper is to review the development of continuum mechanics models of single leukocytes in both passive deformations and active motions and to indicate some future directions. Models of passive deformations describe the overall rheological behavior of single leukocytes under externally applied forces and predict the average mechanical properties from experimental data. Various “apparent” viscoelastic coefficients are obtained depending on the models assumed and the types of test used. Models of spontaneous motions postulate active driving mechanisms which must be derived internally from the cell itself and probably have different bases for different kind of motions. For pseudopod protrusion on leukocytes, energy transduction from chemical potential to mechanical work associated with actin polymerization at the tip of the projection is assumed to supply the motive power. For pseudopod retraction, active contraction due to actin-myosin interaction is assumed to be the driving force. The feasibility of the hypotheses are tested via numerical examples and comparison of the theoretical results with experimental measurements.
    publisherThe American Society of Mechanical Engineers (ASME)
    titlePassive Deformations and Active Motions of Leukocytes
    typeJournal Paper
    journal volume112
    journal issue3
    journal titleJournal of Biomechanical Engineering
    identifier doi10.1115/1.2891187
    journal fristpage295
    journal lastpage302
    identifier eissn1528-8951
    keywordsMotion
    keywordsDeformation
    keywordsLeukocytes
    keywordsForce
    keywordsMechanisms
    keywordsMeasurement
    keywordsContinuum mechanics
    keywordsMechanical properties
    keywordsChemical potential AND Polymerization
    treeJournal of Biomechanical Engineering:;1990:;volume( 112 ):;issue: 003
    contenttypeFulltext
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