Water defects induced by expansion and electrical fields in DMPCand DMPE monolayers: contribution of hydration and confined water

Autores
Almaleck, Samuel Hugo; Gordillo, Gabriel Jorge; Disalvo, Edgardo Anibal
Año de publicación
2012
Idioma
inglés
Tipo de recurso
artículo
Estado
versión publicada
Descripción
The values of capacitance of dimyristoylphosphatidylcholine (DMPC) and dimyristoylphosphatidylethanolamine (DMPE) monolayers on Hg, derived from cyclic voltammetry studies indicate that when the lipids are near the phase transition temperature fractures are formed at a critical area beyond that corresponding to the hydration shell of the lipids in the liquid expanded state. Similar fractures are inferred to be formed when an electric field is applied at constant area, at a breaking potential which is a function of the lipid species. These voltage values denote that energy involved in the transition induced by the electrical field is much higher for DMPE than for DMPC at low areas. This can be explained by the higher intermolecular lateral interactions by H-bonds between the ethanolamine and phosphate groups. However, at larger areas, the energy values for DMPC are as high as for DMPE which is understood to be due to the higher hydration of phosphocholine head groups. This finding gives a new insight in relation to the dynamics of the lipid head groups at the membrane interphase region in terms of the states of water between the lipids. This is congruent with previous results evaluated with the well known ΔΠ vs. surface pressure plots in monolayers of the same lipids at air-water interfaces.
Fil: Almaleck, Samuel Hugo. Universidad de Buenos Aires. Facultad de Farmacia y Bioquímica. Departamento de Química Analítica y Fisicoquímica. Cátedra de Química General e Inorgánica; Argentina
Fil: Gordillo, Gabriel Jorge. Universidad de Buenos Aires. Facultad de Ciencias Exactas y Naturales. Departamento de Química Inorgánica, Analítica y Química Física; Argentina. Consejo Nacional de Investigaciones Científicas y Técnicas. Oficina de Coordinación Administrativa Ciudad Universitaria. Instituto de Química, Física de los Materiales, Medioambiente y Energía. Universidad de Buenos Aires. Facultad de Ciencias Exactas y Naturales. Instituto de Química, Física de los Materiales, Medioambiente y Energía; Argentina
Fil: Disalvo, Edgardo Anibal. Consejo Nacional de Investigaciones Científicas y Técnicas; Argentina. Universidad de Buenos Aires. Facultad de Farmacia y Bioquímica. Departamento de Química Analítica y Fisicoquímica. Cátedra de Química General e Inorgánica; Argentina
Materia
Lipid Monolayers
Capacitance Measurements
Head Group Rotation-Head Group Hydration
Dimyristoylphosphatidylcholine (Dmpc)
Dimyristoylphosphatidylethanolamine (Dmpe)
Nivel de accesibilidad
acceso abierto
Condiciones de uso
https://creativecommons.org/licenses/by-nc-sa/2.5/ar/
Repositorio
CONICET Digital (CONICET)
Institución
Consejo Nacional de Investigaciones Científicas y Técnicas
OAI Identificador
oai:ri.conicet.gov.ar:11336/23085
Acceder
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oai_identifier_str oai:ri.conicet.gov.ar:11336/23085
network_acronym_str CONICETDig
repository_id_str 3498
network_name_str CONICET Digital (CONICET)
spelling Water defects induced by expansion and electrical fields in DMPCand DMPE monolayers: contribution of hydration and confined waterAlmaleck, Samuel HugoGordillo, Gabriel JorgeDisalvo, Edgardo AnibalLipid MonolayersCapacitance MeasurementsHead Group Rotation-Head Group HydrationDimyristoylphosphatidylcholine (Dmpc)Dimyristoylphosphatidylethanolamine (Dmpe)https://purl.org/becyt/ford/1.4https://purl.org/becyt/ford/1The values of capacitance of dimyristoylphosphatidylcholine (DMPC) and dimyristoylphosphatidylethanolamine (DMPE) monolayers on Hg, derived from cyclic voltammetry studies indicate that when the lipids are near the phase transition temperature fractures are formed at a critical area beyond that corresponding to the hydration shell of the lipids in the liquid expanded state. Similar fractures are inferred to be formed when an electric field is applied at constant area, at a breaking potential which is a function of the lipid species. These voltage values denote that energy involved in the transition induced by the electrical field is much higher for DMPE than for DMPC at low areas. This can be explained by the higher intermolecular lateral interactions by H-bonds between the ethanolamine and phosphate groups. However, at larger areas, the energy values for DMPC are as high as for DMPE which is understood to be due to the higher hydration of phosphocholine head groups. This finding gives a new insight in relation to the dynamics of the lipid head groups at the membrane interphase region in terms of the states of water between the lipids. This is congruent with previous results evaluated with the well known ΔΠ vs. surface pressure plots in monolayers of the same lipids at air-water interfaces.Fil: Almaleck, Samuel Hugo. Universidad de Buenos Aires. Facultad de Farmacia y Bioquímica. Departamento de Química Analítica y Fisicoquímica. Cátedra de Química General e Inorgánica; ArgentinaFil: Gordillo, Gabriel Jorge. Universidad de Buenos Aires. Facultad de Ciencias Exactas y Naturales. Departamento de Química Inorgánica, Analítica y Química Física; Argentina. Consejo Nacional de Investigaciones Científicas y Técnicas. Oficina de Coordinación Administrativa Ciudad Universitaria. Instituto de Química, Física de los Materiales, Medioambiente y Energía. Universidad de Buenos Aires. Facultad de Ciencias Exactas y Naturales. Instituto de Química, Física de los Materiales, Medioambiente y Energía; ArgentinaFil: Disalvo, Edgardo Anibal. Consejo Nacional de Investigaciones Científicas y Técnicas; Argentina. Universidad de Buenos Aires. Facultad de Farmacia y Bioquímica. Departamento de Química Analítica y Fisicoquímica. Cátedra de Química General e Inorgánica; ArgentinaElsevier2012-10info:eu-repo/semantics/articleinfo:eu-repo/semantics/publishedVersionhttp://purl.org/coar/resource_type/c_6501info:ar-repo/semantics/articuloapplication/pdfapplication/pdfhttp://hdl.handle.net/11336/23085Almaleck, Samuel Hugo; Gordillo, Gabriel Jorge; Disalvo, Edgardo Anibal; Water defects induced by expansion and electrical fields in DMPCand DMPE monolayers: contribution of hydration and confined water; Elsevier; Colloids and Surfaces B: Biointerfaces; 102; 10-2012; 871-8780927-7765CONICET DigitalCONICETenginfo:eu-repo/semantics/altIdentifier/url/http://www.sciencedirect.com/science/article/pii/S0927776512005437info:eu-repo/semantics/altIdentifier/doi/10.1016/j.colsurfb.2012.09.031info:eu-repo/semantics/openAccesshttps://creativecommons.org/licenses/by-nc-sa/2.5/ar/reponame:CONICET Digital (CONICET)instname:Consejo Nacional de Investigaciones Científicas y Técnicas2025-10-15T14:27:32Zoai:ri.conicet.gov.ar:11336/23085instacron:CONICETInstitucionalhttp://ri.conicet.gov.ar/Organismo científico-tecnológicoNo correspondehttp://ri.conicet.gov.ar/oai/requestdasensio@conicet.gov.ar; lcarlino@conicet.gov.arArgentinaNo correspondeNo correspondeNo correspondeopendoar:34982025-10-15 14:27:32.795CONICET Digital (CONICET) - Consejo Nacional de Investigaciones Científicas y Técnicasfalse
dc.title.none.fl_str_mv Water defects induced by expansion and electrical fields in DMPCand DMPE monolayers: contribution of hydration and confined water
title Water defects induced by expansion and electrical fields in DMPCand DMPE monolayers: contribution of hydration and confined water
spellingShingle Water defects induced by expansion and electrical fields in DMPCand DMPE monolayers: contribution of hydration and confined water
Almaleck, Samuel Hugo
Lipid Monolayers
Capacitance Measurements
Head Group Rotation-Head Group Hydration
Dimyristoylphosphatidylcholine (Dmpc)
Dimyristoylphosphatidylethanolamine (Dmpe)
title_short Water defects induced by expansion and electrical fields in DMPCand DMPE monolayers: contribution of hydration and confined water
title_full Water defects induced by expansion and electrical fields in DMPCand DMPE monolayers: contribution of hydration and confined water
title_fullStr Water defects induced by expansion and electrical fields in DMPCand DMPE monolayers: contribution of hydration and confined water
title_full_unstemmed Water defects induced by expansion and electrical fields in DMPCand DMPE monolayers: contribution of hydration and confined water
title_sort Water defects induced by expansion and electrical fields in DMPCand DMPE monolayers: contribution of hydration and confined water
dc.creator.none.fl_str_mv Almaleck, Samuel Hugo
Gordillo, Gabriel Jorge
Disalvo, Edgardo Anibal
author Almaleck, Samuel Hugo
author_facet Almaleck, Samuel Hugo
Gordillo, Gabriel Jorge
Disalvo, Edgardo Anibal
author_role author
author2 Gordillo, Gabriel Jorge
Disalvo, Edgardo Anibal
author2_role author
author
dc.subject.none.fl_str_mv Lipid Monolayers
Capacitance Measurements
Head Group Rotation-Head Group Hydration
Dimyristoylphosphatidylcholine (Dmpc)
Dimyristoylphosphatidylethanolamine (Dmpe)
topic Lipid Monolayers
Capacitance Measurements
Head Group Rotation-Head Group Hydration
Dimyristoylphosphatidylcholine (Dmpc)
Dimyristoylphosphatidylethanolamine (Dmpe)
purl_subject.fl_str_mv https://purl.org/becyt/ford/1.4
https://purl.org/becyt/ford/1
dc.description.none.fl_txt_mv The values of capacitance of dimyristoylphosphatidylcholine (DMPC) and dimyristoylphosphatidylethanolamine (DMPE) monolayers on Hg, derived from cyclic voltammetry studies indicate that when the lipids are near the phase transition temperature fractures are formed at a critical area beyond that corresponding to the hydration shell of the lipids in the liquid expanded state. Similar fractures are inferred to be formed when an electric field is applied at constant area, at a breaking potential which is a function of the lipid species. These voltage values denote that energy involved in the transition induced by the electrical field is much higher for DMPE than for DMPC at low areas. This can be explained by the higher intermolecular lateral interactions by H-bonds between the ethanolamine and phosphate groups. However, at larger areas, the energy values for DMPC are as high as for DMPE which is understood to be due to the higher hydration of phosphocholine head groups. This finding gives a new insight in relation to the dynamics of the lipid head groups at the membrane interphase region in terms of the states of water between the lipids. This is congruent with previous results evaluated with the well known ΔΠ vs. surface pressure plots in monolayers of the same lipids at air-water interfaces.
Fil: Almaleck, Samuel Hugo. Universidad de Buenos Aires. Facultad de Farmacia y Bioquímica. Departamento de Química Analítica y Fisicoquímica. Cátedra de Química General e Inorgánica; Argentina
Fil: Gordillo, Gabriel Jorge. Universidad de Buenos Aires. Facultad de Ciencias Exactas y Naturales. Departamento de Química Inorgánica, Analítica y Química Física; Argentina. Consejo Nacional de Investigaciones Científicas y Técnicas. Oficina de Coordinación Administrativa Ciudad Universitaria. Instituto de Química, Física de los Materiales, Medioambiente y Energía. Universidad de Buenos Aires. Facultad de Ciencias Exactas y Naturales. Instituto de Química, Física de los Materiales, Medioambiente y Energía; Argentina
Fil: Disalvo, Edgardo Anibal. Consejo Nacional de Investigaciones Científicas y Técnicas; Argentina. Universidad de Buenos Aires. Facultad de Farmacia y Bioquímica. Departamento de Química Analítica y Fisicoquímica. Cátedra de Química General e Inorgánica; Argentina
description The values of capacitance of dimyristoylphosphatidylcholine (DMPC) and dimyristoylphosphatidylethanolamine (DMPE) monolayers on Hg, derived from cyclic voltammetry studies indicate that when the lipids are near the phase transition temperature fractures are formed at a critical area beyond that corresponding to the hydration shell of the lipids in the liquid expanded state. Similar fractures are inferred to be formed when an electric field is applied at constant area, at a breaking potential which is a function of the lipid species. These voltage values denote that energy involved in the transition induced by the electrical field is much higher for DMPE than for DMPC at low areas. This can be explained by the higher intermolecular lateral interactions by H-bonds between the ethanolamine and phosphate groups. However, at larger areas, the energy values for DMPC are as high as for DMPE which is understood to be due to the higher hydration of phosphocholine head groups. This finding gives a new insight in relation to the dynamics of the lipid head groups at the membrane interphase region in terms of the states of water between the lipids. This is congruent with previous results evaluated with the well known ΔΠ vs. surface pressure plots in monolayers of the same lipids at air-water interfaces.
publishDate 2012
dc.date.none.fl_str_mv 2012-10
dc.type.none.fl_str_mv info:eu-repo/semantics/article
info:eu-repo/semantics/publishedVersion
http://purl.org/coar/resource_type/c_6501
info:ar-repo/semantics/articulo
format article
status_str publishedVersion
dc.identifier.none.fl_str_mv http://hdl.handle.net/11336/23085
Almaleck, Samuel Hugo; Gordillo, Gabriel Jorge; Disalvo, Edgardo Anibal; Water defects induced by expansion and electrical fields in DMPCand DMPE monolayers: contribution of hydration and confined water; Elsevier; Colloids and Surfaces B: Biointerfaces; 102; 10-2012; 871-878
0927-7765
CONICET Digital
CONICET
url http://hdl.handle.net/11336/23085
identifier_str_mv Almaleck, Samuel Hugo; Gordillo, Gabriel Jorge; Disalvo, Edgardo Anibal; Water defects induced by expansion and electrical fields in DMPCand DMPE monolayers: contribution of hydration and confined water; Elsevier; Colloids and Surfaces B: Biointerfaces; 102; 10-2012; 871-878
0927-7765
CONICET Digital
CONICET
dc.language.none.fl_str_mv eng
language eng
dc.relation.none.fl_str_mv info:eu-repo/semantics/altIdentifier/url/http://www.sciencedirect.com/science/article/pii/S0927776512005437
info:eu-repo/semantics/altIdentifier/doi/10.1016/j.colsurfb.2012.09.031
dc.rights.none.fl_str_mv info:eu-repo/semantics/openAccess
https://creativecommons.org/licenses/by-nc-sa/2.5/ar/
eu_rights_str_mv openAccess
rights_invalid_str_mv https://creativecommons.org/licenses/by-nc-sa/2.5/ar/
dc.format.none.fl_str_mv application/pdf
application/pdf
dc.publisher.none.fl_str_mv Elsevier
publisher.none.fl_str_mv Elsevier
dc.source.none.fl_str_mv reponame:CONICET Digital (CONICET)
instname:Consejo Nacional de Investigaciones Científicas y Técnicas
reponame_str CONICET Digital (CONICET)
collection CONICET Digital (CONICET)
instname_str Consejo Nacional de Investigaciones Científicas y Técnicas
repository.name.fl_str_mv CONICET Digital (CONICET) - Consejo Nacional de Investigaciones Científicas y Técnicas
repository.mail.fl_str_mv dasensio@conicet.gov.ar; lcarlino@conicet.gov.ar
_version_ 1846082731315822592
score 13.22299

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