Conformation of Jojoba oil esters at the air-water interface

Autores
Caruso, Benjamin; Martini, María Florencia; Pickholz, Mónica Andrea
Año de publicación
2016
Idioma
inglés
Tipo de recurso
documento de conferencia
Estado
versión publicada
Descripción
Wax esters (WE) are lipids highly abundant in nature (providing energy storage, buoyancy or preventing dessication) and a constituent of many technological applications (foods, cosmetics, paintings). However, their interfacial behavior has been scarcely described and focusing on those with saturated chains (thus in solid state) which don’t form stable monolayers. Previously, we evaluated the configuration of the WE from ”jojoba oil” (J) at the air-water interface and we associated the ability of the long chains of WE to form monomolecular layers with its physical state. Thus, we proposed that, in the solid phase, WE exhibited a linear configuration whereas in the fluid state it adopted a hairpin structure with an amphipathic-driven orientation, being this one the structure organizable like compressible monolayers. Such hypothetic configurations were derived just from molecular area measurements. In the present work we contributed with further experimental evidences by combining Langmuir isotherms, measurements of surface potential, PM-IRRAS analysis of J and atomic-scale molecular dynamic simulations of an ether representative of WE. The surface potential (SP) of the monolayers during compression exhibited a pattern similar to that of most glycerophospholipids. The maximal SP, derived from a model that considered two populations of oriented water, was very close to the experimental value. The orientation of the ester group that was assumed in that calculation was coherent with the PM-IRRAS behavior of the carbonyl group with the C=O oriented towards the water and the C-O lying along the surface and were in accordance with their orientational angles ( 45° and 90°, respectively) determined by atomic-scale molecular dynamic simulations. Taken together the present results confirm a hairpin configuration of WE at the air-water interface.
Fil: Caruso, Benjamin. Consejo Nacional de Investigaciones Científicas y Técnicas. Centro Científico Tecnológico Conicet - Córdoba. Instituto de Investigaciones Biológicas y Tecnológicas. Universidad Nacional de Córdoba. Facultad de Ciencias Exactas, Físicas y Naturales. Instituto de Investigaciones Biológicas y Tecnológicas; Argentina
Fil: Martini, María Florencia. Consejo Nacional de Investigaciones Científicas y Técnicas. Oficina de Coordinación Administrativa Houssay. Instituto de Química y Metabolismo del Fármaco. Universidad de Buenos Aires. Facultad de Farmacia y Bioquímica. Instituto de Química y Metabolismo del Fármaco; Argentina
Fil: Pickholz, Mónica Andrea. Consejo Nacional de Investigaciones Científicas y Técnicas. Oficina de Coordinación Administrativa Ciudad Universitaria. Instituto de Física de Buenos Aires. Universidad de Buenos Aires. Facultad de Ciencias Exactas y Naturales. Instituto de Física de Buenos Aires; Argentina. Consejo Nacional de Investigaciones Científicas y Técnicas. Oficina de Coordinación Administrativa Houssay. Instituto de Nanobiotecnología. Universidad de Buenos Aires. Facultad de Farmacia y Bioquímica. Instituto de Nanobiotecnología; Argentina
XLV Reunión Anual de la SAB
San Miguel de Tucumán
Argentina
Sociedad Argentina de Biofísica
Materia
Wax esters
Monolayers
Jojoba oil
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:11336/244786
Acceder
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network_name_str CONICET Digital (CONICET)
spelling Conformation of Jojoba oil esters at the air-water interfaceCaruso, BenjaminMartini, María FlorenciaPickholz, Mónica AndreaWax estersMonolayersJojoba oilhttps://purl.org/becyt/ford/1.6https://purl.org/becyt/ford/1Wax esters (WE) are lipids highly abundant in nature (providing energy storage, buoyancy or preventing dessication) and a constituent of many technological applications (foods, cosmetics, paintings). However, their interfacial behavior has been scarcely described and focusing on those with saturated chains (thus in solid state) which don’t form stable monolayers. Previously, we evaluated the configuration of the WE from ”jojoba oil” (J) at the air-water interface and we associated the ability of the long chains of WE to form monomolecular layers with its physical state. Thus, we proposed that, in the solid phase, WE exhibited a linear configuration whereas in the fluid state it adopted a hairpin structure with an amphipathic-driven orientation, being this one the structure organizable like compressible monolayers. Such hypothetic configurations were derived just from molecular area measurements. In the present work we contributed with further experimental evidences by combining Langmuir isotherms, measurements of surface potential, PM-IRRAS analysis of J and atomic-scale molecular dynamic simulations of an ether representative of WE. The surface potential (SP) of the monolayers during compression exhibited a pattern similar to that of most glycerophospholipids. The maximal SP, derived from a model that considered two populations of oriented water, was very close to the experimental value. The orientation of the ester group that was assumed in that calculation was coherent with the PM-IRRAS behavior of the carbonyl group with the C=O oriented towards the water and the C-O lying along the surface and were in accordance with their orientational angles ( 45° and 90°, respectively) determined by atomic-scale molecular dynamic simulations. Taken together the present results confirm a hairpin configuration of WE at the air-water interface.Fil: Caruso, Benjamin. Consejo Nacional de Investigaciones Científicas y Técnicas. Centro Científico Tecnológico Conicet - Córdoba. Instituto de Investigaciones Biológicas y Tecnológicas. Universidad Nacional de Córdoba. Facultad de Ciencias Exactas, Físicas y Naturales. Instituto de Investigaciones Biológicas y Tecnológicas; ArgentinaFil: Martini, María Florencia. Consejo Nacional de Investigaciones Científicas y Técnicas. Oficina de Coordinación Administrativa Houssay. Instituto de Química y Metabolismo del Fármaco. Universidad de Buenos Aires. Facultad de Farmacia y Bioquímica. Instituto de Química y Metabolismo del Fármaco; ArgentinaFil: Pickholz, Mónica Andrea. Consejo Nacional de Investigaciones Científicas y Técnicas. Oficina de Coordinación Administrativa Ciudad Universitaria. Instituto de Física de Buenos Aires. Universidad de Buenos Aires. Facultad de Ciencias Exactas y Naturales. Instituto de Física de Buenos Aires; Argentina. Consejo Nacional de Investigaciones Científicas y Técnicas. Oficina de Coordinación Administrativa Houssay. Instituto de Nanobiotecnología. Universidad de Buenos Aires. Facultad de Farmacia y Bioquímica. Instituto de Nanobiotecnología; ArgentinaXLV Reunión Anual de la SABSan Miguel de TucumánArgentinaSociedad Argentina de BiofísicaSociedad Argentina de BiofísicaSica, Mauricio Pablo2016info:eu-repo/semantics/publishedVersioninfo:eu-repo/semantics/conferenceObjectReuniónBookhttp://purl.org/coar/resource_type/c_5794info:ar-repo/semantics/documentoDeConferenciaapplication/pdfapplication/pdfapplication/pdfapplication/pdfapplication/pdfhttp://hdl.handle.net/11336/244786Conformation of Jojoba oil esters at the air-water interface; XLV Reunión Anual de la SAB; San Miguel de Tucumán; Argentina; 2016; 133-134CONICET DigitalCONICETenginfo:eu-repo/semantics/altIdentifier/url/https://biofisica.org.ar/reuniones-cientificas/reunionsab-previas/Internacionalinfo:eu-repo/semantics/openAccesshttps://creativecommons.org/licenses/by-nc-sa/2.5/ar/reponame:CONICET Digital (CONICET)instname:Consejo Nacional de Investigaciones Científicas y Técnicas2025-09-03T09:50:20Zoai:ri.conicet.gov.ar:11336/244786instacron: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:34982025-09-03 09:50:21.075CONICET Digital (CONICET) - Consejo Nacional de Investigaciones Científicas y Técnicasfalse
dc.title.none.fl_str_mv Conformation of Jojoba oil esters at the air-water interface
title Conformation of Jojoba oil esters at the air-water interface
spellingShingle Conformation of Jojoba oil esters at the air-water interface
Caruso, Benjamin
Wax esters
Monolayers
Jojoba oil
title_short Conformation of Jojoba oil esters at the air-water interface
title_full Conformation of Jojoba oil esters at the air-water interface
title_fullStr Conformation of Jojoba oil esters at the air-water interface
title_full_unstemmed Conformation of Jojoba oil esters at the air-water interface
title_sort Conformation of Jojoba oil esters at the air-water interface
dc.creator.none.fl_str_mv Caruso, Benjamin
Martini, María Florencia
Pickholz, Mónica Andrea
author Caruso, Benjamin
author_facet Caruso, Benjamin
Martini, María Florencia
Pickholz, Mónica Andrea
author_role author
author2 Martini, María Florencia
Pickholz, Mónica Andrea
author2_role author
author
dc.contributor.none.fl_str_mv Sica, Mauricio Pablo
dc.subject.none.fl_str_mv Wax esters
Monolayers
Jojoba oil
topic Wax esters
Monolayers
Jojoba oil
purl_subject.fl_str_mv https://purl.org/becyt/ford/1.6
https://purl.org/becyt/ford/1
dc.description.none.fl_txt_mv Wax esters (WE) are lipids highly abundant in nature (providing energy storage, buoyancy or preventing dessication) and a constituent of many technological applications (foods, cosmetics, paintings). However, their interfacial behavior has been scarcely described and focusing on those with saturated chains (thus in solid state) which don’t form stable monolayers. Previously, we evaluated the configuration of the WE from ”jojoba oil” (J) at the air-water interface and we associated the ability of the long chains of WE to form monomolecular layers with its physical state. Thus, we proposed that, in the solid phase, WE exhibited a linear configuration whereas in the fluid state it adopted a hairpin structure with an amphipathic-driven orientation, being this one the structure organizable like compressible monolayers. Such hypothetic configurations were derived just from molecular area measurements. In the present work we contributed with further experimental evidences by combining Langmuir isotherms, measurements of surface potential, PM-IRRAS analysis of J and atomic-scale molecular dynamic simulations of an ether representative of WE. The surface potential (SP) of the monolayers during compression exhibited a pattern similar to that of most glycerophospholipids. The maximal SP, derived from a model that considered two populations of oriented water, was very close to the experimental value. The orientation of the ester group that was assumed in that calculation was coherent with the PM-IRRAS behavior of the carbonyl group with the C=O oriented towards the water and the C-O lying along the surface and were in accordance with their orientational angles ( 45° and 90°, respectively) determined by atomic-scale molecular dynamic simulations. Taken together the present results confirm a hairpin configuration of WE at the air-water interface.
Fil: Caruso, Benjamin. Consejo Nacional de Investigaciones Científicas y Técnicas. Centro Científico Tecnológico Conicet - Córdoba. Instituto de Investigaciones Biológicas y Tecnológicas. Universidad Nacional de Córdoba. Facultad de Ciencias Exactas, Físicas y Naturales. Instituto de Investigaciones Biológicas y Tecnológicas; Argentina
Fil: Martini, María Florencia. Consejo Nacional de Investigaciones Científicas y Técnicas. Oficina de Coordinación Administrativa Houssay. Instituto de Química y Metabolismo del Fármaco. Universidad de Buenos Aires. Facultad de Farmacia y Bioquímica. Instituto de Química y Metabolismo del Fármaco; Argentina
Fil: Pickholz, Mónica Andrea. Consejo Nacional de Investigaciones Científicas y Técnicas. Oficina de Coordinación Administrativa Ciudad Universitaria. Instituto de Física de Buenos Aires. Universidad de Buenos Aires. Facultad de Ciencias Exactas y Naturales. Instituto de Física de Buenos Aires; Argentina. Consejo Nacional de Investigaciones Científicas y Técnicas. Oficina de Coordinación Administrativa Houssay. Instituto de Nanobiotecnología. Universidad de Buenos Aires. Facultad de Farmacia y Bioquímica. Instituto de Nanobiotecnología; Argentina
XLV Reunión Anual de la SAB
San Miguel de Tucumán
Argentina
Sociedad Argentina de Biofísica
description Wax esters (WE) are lipids highly abundant in nature (providing energy storage, buoyancy or preventing dessication) and a constituent of many technological applications (foods, cosmetics, paintings). However, their interfacial behavior has been scarcely described and focusing on those with saturated chains (thus in solid state) which don’t form stable monolayers. Previously, we evaluated the configuration of the WE from ”jojoba oil” (J) at the air-water interface and we associated the ability of the long chains of WE to form monomolecular layers with its physical state. Thus, we proposed that, in the solid phase, WE exhibited a linear configuration whereas in the fluid state it adopted a hairpin structure with an amphipathic-driven orientation, being this one the structure organizable like compressible monolayers. Such hypothetic configurations were derived just from molecular area measurements. In the present work we contributed with further experimental evidences by combining Langmuir isotherms, measurements of surface potential, PM-IRRAS analysis of J and atomic-scale molecular dynamic simulations of an ether representative of WE. The surface potential (SP) of the monolayers during compression exhibited a pattern similar to that of most glycerophospholipids. The maximal SP, derived from a model that considered two populations of oriented water, was very close to the experimental value. The orientation of the ester group that was assumed in that calculation was coherent with the PM-IRRAS behavior of the carbonyl group with the C=O oriented towards the water and the C-O lying along the surface and were in accordance with their orientational angles ( 45° and 90°, respectively) determined by atomic-scale molecular dynamic simulations. Taken together the present results confirm a hairpin configuration of WE at the air-water interface.
publishDate 2016
dc.date.none.fl_str_mv 2016
dc.type.none.fl_str_mv info:eu-repo/semantics/publishedVersion
info:eu-repo/semantics/conferenceObject
Reunión
Book
http://purl.org/coar/resource_type/c_5794
info:ar-repo/semantics/documentoDeConferencia
status_str publishedVersion
format conferenceObject
dc.identifier.none.fl_str_mv http://hdl.handle.net/11336/244786
Conformation of Jojoba oil esters at the air-water interface; XLV Reunión Anual de la SAB; San Miguel de Tucumán; Argentina; 2016; 133-134
CONICET Digital
CONICET
url http://hdl.handle.net/11336/244786
identifier_str_mv Conformation of Jojoba oil esters at the air-water interface; XLV Reunión Anual de la SAB; San Miguel de Tucumán; Argentina; 2016; 133-134
CONICET Digital
CONICET
dc.language.none.fl_str_mv eng
language eng
dc.relation.none.fl_str_mv info:eu-repo/semantics/altIdentifier/url/https://biofisica.org.ar/reuniones-cientificas/reunionsab-previas/
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
application/pdf
application/pdf
application/pdf
dc.coverage.none.fl_str_mv Internacional
dc.publisher.none.fl_str_mv Sociedad Argentina de Biofísica
publisher.none.fl_str_mv Sociedad Argentina de Biofísica
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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