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1. Verfasser:	L. Martínez-Balbuena
Format:	Artículo científico
Sprache:	es
Veröffentlicht:	Sociedad Mexicana de Física A.C. 2010
Schlagworte:	Física, Astronomía y Matemáticas bicapas lipídicas membranas biológicas elasticidad de membranas Energía libre de Helfrich
Online-Zugang:	https://www.redalyc.org/articulo.oa?id=57048153013
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Elasticidad de las membranas biológicas L. Martínez-Balbuena A. Maldonado-Arce E. Hernández-Zapata Física, Astronomía y Matemáticas bicapas lipídicas membranas biológicas elasticidad de membranas Energía libre de Helfrich En este art ́ıculo se presenta una revisi ́on del conocimiento actual sobre las propiedades el ́asticas de las membranas de origen biol ́ogico. Bajola hip ́otesis del mosaico fluido se considera a una bicapa de fosfol ́ıpido como la base estructural de una membrana biol ́ogica y se expone unmodelo debido a Helfrich a partir del cual se obtiene una expresi ́on para la energ ́ıa el ́astica de una membrana. La energ ́ıa libre queda com-pletamente caracterizada por sus curvaturas locales principales y cuatro par ́ametros dependientes de la composici ́on qu ́ımica de la membranay de su entorno local. As ́ı mismo, se expone la justificaci ́on te ́orica de un m ́etodo experimental (que hace uso de micromanipulaci ́on conmicropipetas) que permite medir la constante el ́astica de curvatura media de una membrana. Finalmente se describen algunas consecuenciasf ́ısicas de estos conceptos, como la explicaci ́on de la transici ́on de una fase lamelar a una esponja o la aparici ́on de la interacci ́on est ́ericaentre membranas. 2010 artículo científico 0035-001X https://www.redalyc.org/articulo.oa?id=57048153013 es http://www.redalyc.org/revista.oa?id=570 Revista Mexicana de Física application/pdf Sociedad Mexicana de Física A.C. Revista Mexicana de Física (México) Num.1 Vol.56

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