Open AccessNematic ordering pattern formation in the process of self-organization of microtubules in a gravitational field
Author(s) -
Jian Hu,
Qiu Xi-Jun
Publication year - 2014
Publication title -
wuli xuebao
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.199
H-Index - 47
ISSN - 1000-3290
DOI - 10.7498/aps.63.078201
Subject(s) - physics , liquid crystal , phase transition , scaling , isotropy , pattern formation , gravitation , gravitational field , field (mathematics) , condensed matter physics , phase (matter) , classical mechanics , optics , quantum mechanics , geometry , mathematics , biology , pure mathematics , genetics
By virtue of a functional scaling, the free energy for cytoskeletal microtubule (MT) solution system in the gravitational field has been proposed theoretically, and on this basis the influence of gravitational field on MT’s self-organization process is studied. A concentration gradient coupled with orientational order characteristic of nematic ordering pattern formation is the new feature emerging in the presence of gravity. Theoretical calculation results show that gravity facilitates the isotropic to nematic phase transition, which is reflected in a significantly broader transition region and the phase coexistence region increases with increasing g or MT concentration. We also discuss the numerical results obtained due to local MT concentration changing with the height of the vessel and some phase transition properties.