On the dielectric spectra of proteins in conducting media
- Autores
- Ruderman, Graciela; Xammar Oro, Juan Roberto de
- Año de publicación
- 1991
- Idioma
- inglés
- Tipo de recurso
- artículo
- Estado
- versión publicada
- Descripción
- The effect of conductivity on the dielectric measurements of proteins is studied. For that purpose the dielectric spectra (0.03–13 MHz) of serum albumin and myoglobin in solutions of varying conductivities were recorded. The results presented confirm that Maxwell's prediction of a threshold frequency in conducting materials also holds for protein solutions. The threshold frequency of a serum albumin solution is experimentally determined and the ionic screening of the electric field when performing dielectric spectra of these samples discussed. Three distinct frequency regions must be considered: a low frequency region where the sample behaves like a conductor; an intermediate region centered around the threshold frequency where the free charges partially screen the fixed charges; and a high frequency region where the sample behaves like a good dielectric. Dielectric measurements in the low frequency region defined above, are not possible.
Instituto de Física de Líquidos y Sistemas Biológicos - Materia
-
Física
Ciencias Exactas
Proteins
dielectric spectra
Maxwell’s frequency
permittivity
conductivity - Nivel de accesibilidad
- acceso abierto
- Condiciones de uso
- http://creativecommons.org/licenses/by/4.0/
- Repositorio
.jpg)
- Institución
- Universidad Nacional de La Plata
- OAI Identificador
- oai:sedici.unlp.edu.ar:10915/139408
Ver los metadatos del registro completo
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On the dielectric spectra of proteins in conducting mediaRuderman, GracielaXammar Oro, Juan Roberto deFísicaCiencias ExactasProteinsdielectric spectraMaxwell’s frequencypermittivityconductivityThe effect of conductivity on the dielectric measurements of proteins is studied. For that purpose the dielectric spectra (0.03–13 MHz) of serum albumin and myoglobin in solutions of varying conductivities were recorded. The results presented confirm that Maxwell's prediction of a threshold frequency in conducting materials also holds for protein solutions. The threshold frequency of a serum albumin solution is experimentally determined and the ionic screening of the electric field when performing dielectric spectra of these samples discussed. Three distinct frequency regions must be considered: a low frequency region where the sample behaves like a conductor; an intermediate region centered around the threshold frequency where the free charges partially screen the fixed charges; and a high frequency region where the sample behaves like a good dielectric. Dielectric measurements in the low frequency region defined above, are not possible.Instituto de Física de Líquidos y Sistemas Biológicos1991info:eu-repo/semantics/articleinfo:eu-repo/semantics/publishedVersionArticulohttp://purl.org/coar/resource_type/c_6501info:ar-repo/semantics/articuloapplication/pdf167-174http://sedici.unlp.edu.ar/handle/10915/139408enginfo:eu-repo/semantics/altIdentifier/issn/0092-0606info:eu-repo/semantics/altIdentifier/issn/1573-0689info:eu-repo/semantics/altIdentifier/doi/10.1007/bf00417805info:eu-repo/semantics/openAccesshttp://creativecommons.org/licenses/by/4.0/Creative Commons Attribution 4.0 International (CC BY 4.0)reponame:SEDICI (UNLP)instname:Universidad Nacional de La Platainstacron:UNLP2025-09-29T11:32:02Zoai:sedici.unlp.edu.ar:10915/139408Institucionalhttp://sedici.unlp.edu.ar/Universidad públicaNo correspondehttp://sedici.unlp.edu.ar/oai/snrdalira@sedici.unlp.edu.arArgentinaNo correspondeNo correspondeNo correspondeopendoar:13292025-09-29 11:32:02.433SEDICI (UNLP) - Universidad Nacional de La Platafalse |
| dc.title.none.fl_str_mv |
On the dielectric spectra of proteins in conducting media |
| title |
On the dielectric spectra of proteins in conducting media |
| spellingShingle |
On the dielectric spectra of proteins in conducting media Ruderman, Graciela Física Ciencias Exactas Proteins dielectric spectra Maxwell’s frequency permittivity conductivity |
| title_short |
On the dielectric spectra of proteins in conducting media |
| title_full |
On the dielectric spectra of proteins in conducting media |
| title_fullStr |
On the dielectric spectra of proteins in conducting media |
| title_full_unstemmed |
On the dielectric spectra of proteins in conducting media |
| title_sort |
On the dielectric spectra of proteins in conducting media |
| dc.creator.none.fl_str_mv |
Ruderman, Graciela Xammar Oro, Juan Roberto de |
| author |
Ruderman, Graciela |
| author_facet |
Ruderman, Graciela Xammar Oro, Juan Roberto de |
| author_role |
author |
| author2 |
Xammar Oro, Juan Roberto de |
| author2_role |
author |
| dc.subject.none.fl_str_mv |
Física Ciencias Exactas Proteins dielectric spectra Maxwell’s frequency permittivity conductivity |
| topic |
Física Ciencias Exactas Proteins dielectric spectra Maxwell’s frequency permittivity conductivity |
| dc.description.none.fl_txt_mv |
The effect of conductivity on the dielectric measurements of proteins is studied. For that purpose the dielectric spectra (0.03–13 MHz) of serum albumin and myoglobin in solutions of varying conductivities were recorded. The results presented confirm that Maxwell's prediction of a threshold frequency in conducting materials also holds for protein solutions. The threshold frequency of a serum albumin solution is experimentally determined and the ionic screening of the electric field when performing dielectric spectra of these samples discussed. Three distinct frequency regions must be considered: a low frequency region where the sample behaves like a conductor; an intermediate region centered around the threshold frequency where the free charges partially screen the fixed charges; and a high frequency region where the sample behaves like a good dielectric. Dielectric measurements in the low frequency region defined above, are not possible. Instituto de Física de Líquidos y Sistemas Biológicos |
| description |
The effect of conductivity on the dielectric measurements of proteins is studied. For that purpose the dielectric spectra (0.03–13 MHz) of serum albumin and myoglobin in solutions of varying conductivities were recorded. The results presented confirm that Maxwell's prediction of a threshold frequency in conducting materials also holds for protein solutions. The threshold frequency of a serum albumin solution is experimentally determined and the ionic screening of the electric field when performing dielectric spectra of these samples discussed. Three distinct frequency regions must be considered: a low frequency region where the sample behaves like a conductor; an intermediate region centered around the threshold frequency where the free charges partially screen the fixed charges; and a high frequency region where the sample behaves like a good dielectric. Dielectric measurements in the low frequency region defined above, are not possible. |
| publishDate |
1991 |
| dc.date.none.fl_str_mv |
1991 |
| dc.type.none.fl_str_mv |
info:eu-repo/semantics/article info:eu-repo/semantics/publishedVersion Articulo 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://sedici.unlp.edu.ar/handle/10915/139408 |
| url |
http://sedici.unlp.edu.ar/handle/10915/139408 |
| dc.language.none.fl_str_mv |
eng |
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eng |
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info:eu-repo/semantics/altIdentifier/issn/0092-0606 info:eu-repo/semantics/altIdentifier/issn/1573-0689 info:eu-repo/semantics/altIdentifier/doi/10.1007/bf00417805 |
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info:eu-repo/semantics/openAccess http://creativecommons.org/licenses/by/4.0/ Creative Commons Attribution 4.0 International (CC BY 4.0) |
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openAccess |
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http://creativecommons.org/licenses/by/4.0/ Creative Commons Attribution 4.0 International (CC BY 4.0) |
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application/pdf 167-174 |
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