On the specific role of coions and counterions on κ-carrageenan conformation
The role of the nature and concentration of counterions and coions on the conformation of κ-carrageenan is discussed; particularly, that of iodide compared with chloride based on the results obtained from optical rotation, viscometry and microcalorimetry. Iodide gives a more stable helical conformat...
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1997
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| Acceso en línea: | https://bibliotecadigital.exactas.uba.ar/collection/paper/document/paper_01418130_v20_n1_p35_Ciancia http://hdl.handle.net/20.500.12110/paper_01418130_v20_n1_p35_Ciancia |
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paper:paper_01418130_v20_n1_p35_Ciancia2023-06-08T15:11:22Z On the specific role of coions and counterions on κ-carrageenan conformation Ciancia, Marina Ionic interaction Solution conformation κ-carrageenan carrageenan chloride iodide article conformational transition microcalorimetry molecular weight optical rotation viscometry The role of the nature and concentration of counterions and coions on the conformation of κ-carrageenan is discussed; particularly, that of iodide compared with chloride based on the results obtained from optical rotation, viscometry and microcalorimetry. Iodide gives a more stable helical conformation, with a larger degree of order; at the same time, it represses aggregation of the helices and the gelation ability. Concerning the ordered conformation obtained in the presence of iodide colons, the results obtained are not conclusive. From the enthalpy of the conformational change, it seems that, even in the presence of iodide, the ordered conformation remains a double helix. On the other hand, no doubling of molecular weight was obtained by MALLS/GPC. Thus, this aspect remains still under discussion. Fil:Ciancia, M. Universidad de Buenos Aires. Facultad de Ciencias Exactas y Naturales; Argentina. 1997 https://bibliotecadigital.exactas.uba.ar/collection/paper/document/paper_01418130_v20_n1_p35_Ciancia http://hdl.handle.net/20.500.12110/paper_01418130_v20_n1_p35_Ciancia |
| institution |
Universidad de Buenos Aires |
| institution_str |
I-28 |
| repository_str |
R-134 |
| collection |
Biblioteca Digital - Facultad de Ciencias Exactas y Naturales (UBA) |
| topic |
Ionic interaction Solution conformation κ-carrageenan carrageenan chloride iodide article conformational transition microcalorimetry molecular weight optical rotation viscometry |
| spellingShingle |
Ionic interaction Solution conformation κ-carrageenan carrageenan chloride iodide article conformational transition microcalorimetry molecular weight optical rotation viscometry Ciancia, Marina On the specific role of coions and counterions on κ-carrageenan conformation |
| topic_facet |
Ionic interaction Solution conformation κ-carrageenan carrageenan chloride iodide article conformational transition microcalorimetry molecular weight optical rotation viscometry |
| description |
The role of the nature and concentration of counterions and coions on the conformation of κ-carrageenan is discussed; particularly, that of iodide compared with chloride based on the results obtained from optical rotation, viscometry and microcalorimetry. Iodide gives a more stable helical conformation, with a larger degree of order; at the same time, it represses aggregation of the helices and the gelation ability. Concerning the ordered conformation obtained in the presence of iodide colons, the results obtained are not conclusive. From the enthalpy of the conformational change, it seems that, even in the presence of iodide, the ordered conformation remains a double helix. On the other hand, no doubling of molecular weight was obtained by MALLS/GPC. Thus, this aspect remains still under discussion. |
| author |
Ciancia, Marina |
| author_facet |
Ciancia, Marina |
| author_sort |
Ciancia, Marina |
| title |
On the specific role of coions and counterions on κ-carrageenan conformation |
| title_short |
On the specific role of coions and counterions on κ-carrageenan conformation |
| title_full |
On the specific role of coions and counterions on κ-carrageenan conformation |
| title_fullStr |
On the specific role of coions and counterions on κ-carrageenan conformation |
| title_full_unstemmed |
On the specific role of coions and counterions on κ-carrageenan conformation |
| title_sort |
on the specific role of coions and counterions on κ-carrageenan conformation |
| publishDate |
1997 |
| url |
https://bibliotecadigital.exactas.uba.ar/collection/paper/document/paper_01418130_v20_n1_p35_Ciancia http://hdl.handle.net/20.500.12110/paper_01418130_v20_n1_p35_Ciancia |
| work_keys_str_mv |
AT cianciamarina onthespecificroleofcoionsandcounterionsonkcarrageenanconformation |
| _version_ |
1768543838947770368 |