On the dielectric spectra of proteins in conducting media
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 fre...
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| Formato: | Articulo |
| Lenguaje: | Inglés |
| Publicado: |
1991
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| Acceso en línea: | http://sedici.unlp.edu.ar/handle/10915/139408 |
| Aporte de: | Aportado por :
SEDICI (UNLP) de
Universidad Nacional de La Plata .
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| id |
I19-R120-10915-139408 |
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I19-R120-10915-1394082022-07-13T04:04:28Z http://sedici.unlp.edu.ar/handle/10915/139408 issn:0092-0606 issn:1573-0689 On the dielectric spectra of proteins in conducting media Ruderman, Graciela Xammar Oro, Juan Roberto de 1991 2022-07-12T18:37:16Z en Física Ciencias Exactas Proteins dielectric spectra Maxwell’s frequency permittivity conductivity 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 Articulo Articulo http://creativecommons.org/licenses/by/4.0/ Creative Commons Attribution 4.0 International (CC BY 4.0) application/pdf 167-174 |
| institution |
Universidad Nacional de La Plata |
| institution_str |
I-19 |
| repository_str |
R-120 |
| collection |
SEDICI (UNLP) |
| language |
Inglés |
| topic |
Física Ciencias Exactas Proteins dielectric spectra Maxwell’s frequency permittivity conductivity |
| spellingShingle |
Física Ciencias Exactas Proteins dielectric spectra Maxwell’s frequency permittivity conductivity Ruderman, Graciela Xammar Oro, Juan Roberto de On the dielectric spectra of proteins in conducting media |
| topic_facet |
Física Ciencias Exactas Proteins dielectric spectra Maxwell’s frequency permittivity conductivity |
| 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. |
| format |
Articulo Articulo |
| author |
Ruderman, Graciela Xammar Oro, Juan Roberto de |
| author_facet |
Ruderman, Graciela Xammar Oro, Juan Roberto de |
| author_sort |
Ruderman, Graciela |
| title |
On the dielectric spectra of proteins in conducting media |
| 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 |
| publishDate |
1991 |
| url |
http://sedici.unlp.edu.ar/handle/10915/139408 |
| work_keys_str_mv |
AT rudermangraciela onthedielectricspectraofproteinsinconductingmedia AT xammarorojuanrobertode onthedielectricspectraofproteinsinconductingmedia |
| _version_ |
1741622799214051328 |