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
- Institución
- Consejo Nacional de Investigaciones Científicas y Técnicas
- OAI Identificador
- oai:ri.conicet.gov.ar:11336/23085
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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 Técnicas2025-09-29T09:38:22Zoai: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:34982025-09-29 09:38:22.436CONICET 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 |
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1844613211963260928 |
score |
13.070432 |