Effect of crosslinking with Ca<sup>++</sup> and Zn<sup>++</sup> in the formation of gellan gum gels

Autores
Verma, Anurag; Pandit, Jayant K.; Wahi, Arun K.
Año de publicación
2012
Idioma
inglés
Tipo de recurso
artículo
Estado
versión publicada
Descripción
This study involves an investigation of the effects of crosslinking of gellan gum (GG) with Ca++ or Zn++ on the physical properties of GG gels. GG gels crosslinked with different concentrations of Ca++ or Zn++ were prepared and parameters such as % water holding capacity and penetration thickness were investigated as measures of the extent of interaction of Ca++ or Zn++ with GG molecules. Data generated from the above studies revealed that Zn++ interacted with the GG molecules to a greater extent than Ca++ . In order to further strengthen our finding, we have prepared Zn++ crosslinked and Ca++ crosslinked floating GG beads respectively by ionotropic gelation in the presence of a gas-generating agent (NaHCO3 ) and compared their physico-chemical properties such as density, drug entrapment efficiency and release in 0.1 M HCl (pH 1.2) using metronidazole (MTZ) as a model drug. Experimental data suggested that Zn++ crosslinked floating GG beads were denser and less buoyant than Ca++ crosslinked floating beads but capable of significantly (p < 0.05) improving MTZ entrapment efficiency and sustaining the MTZ release in 0.1 M HCl (pH 1.2) compared to Ca++ crosslinked floating beads. The difference in observed behavior may be attributed to differences in specificity, soft and hard character, enthalpies of hydration and ionization potentials of Ca++ and Zn++ .
Colegio de Farmacéuticos de la Provincia de Buenos Aires
Materia
Farmacia
floating beads
gellan gum
penetration thickness
entrapment efficiency
water holding capacity
Nivel de accesibilidad
acceso abierto
Condiciones de uso
Licencia de distribución no exclusiva SEDICI
Repositorio
SEDICI (UNLP)
Institución
Universidad Nacional de La Plata
OAI Identificador
oai:sedici.unlp.edu.ar:10915/25642

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network_name_str SEDICI (UNLP)
spelling Effect of crosslinking with Ca<sup>++</sup> and Zn<sup>++</sup> in the formation of gellan gum gelsVerma, AnuragPandit, Jayant K.Wahi, Arun K.Farmaciafloating beadsgellan gumpenetration thicknessentrapment efficiencywater holding capacityThis study involves an investigation of the effects of crosslinking of gellan gum (GG) with Ca<sup>++</sup> or Zn++ on the physical properties of GG gels. GG gels crosslinked with different concentrations of Ca<sup>++</sup> or Zn<sup>++</sup> were prepared and parameters such as % water holding capacity and penetration thickness were investigated as measures of the extent of interaction of Ca<sup>++</sup> or Zn<sup>++</sup> with GG molecules. Data generated from the above studies revealed that Zn<sup>++</sup> interacted with the GG molecules to a greater extent than Ca++ . In order to further strengthen our finding, we have prepared Zn<sup>++</sup> crosslinked and Ca<sup>++</sup> crosslinked floating GG beads respectively by ionotropic gelation in the presence of a gas-generating agent (NaHCO3 ) and compared their physico-chemical properties such as density, drug entrapment efficiency and release in 0.1 M HCl (pH 1.2) using metronidazole (MTZ) as a model drug. Experimental data suggested that Zn<sup>++</sup> crosslinked floating GG beads were denser and less buoyant than Ca<sup>++</sup> crosslinked floating beads but capable of significantly (p < 0.05) improving MTZ entrapment efficiency and sustaining the MTZ release in 0.1 M HCl (pH 1.2) compared to Ca++ crosslinked floating beads. The difference in observed behavior may be attributed to differences in specificity, soft and hard character, enthalpies of hydration and ionization potentials of Ca<sup>++</sup> and Zn<sup>++</sup> .Colegio de Farmacéuticos de la Provincia de Buenos Aires2012info:eu-repo/semantics/articleinfo:eu-repo/semantics/publishedVersionArticulohttp://purl.org/coar/resource_type/c_6501info:ar-repo/semantics/articuloapplication/pdf815-820http://sedici.unlp.edu.ar/handle/10915/25642enginfo:eu-repo/semantics/altIdentifier/url/http://www.latamjpharm.org/resumenes/31/6/LAJOP_31_6_1_4.pdfinfo:eu-repo/semantics/altIdentifier/issn/0326-2383info:eu-repo/semantics/openAccessLicencia de distribución no exclusiva SEDICIreponame:SEDICI (UNLP)instname:Universidad Nacional de La Platainstacron:UNLP2025-09-29T10:56:18Zoai:sedici.unlp.edu.ar:10915/25642Institucionalhttp://sedici.unlp.edu.ar/Universidad públicaNo correspondehttp://sedici.unlp.edu.ar/oai/snrdalira@sedici.unlp.edu.arArgentinaNo correspondeNo correspondeNo correspondeopendoar:13292025-09-29 10:56:18.691SEDICI (UNLP) - Universidad Nacional de La Platafalse
dc.title.none.fl_str_mv Effect of crosslinking with Ca<sup>++</sup> and Zn<sup>++</sup> in the formation of gellan gum gels
title Effect of crosslinking with Ca<sup>++</sup> and Zn<sup>++</sup> in the formation of gellan gum gels
spellingShingle Effect of crosslinking with Ca<sup>++</sup> and Zn<sup>++</sup> in the formation of gellan gum gels
Verma, Anurag
Farmacia
floating beads
gellan gum
penetration thickness
entrapment efficiency
water holding capacity
title_short Effect of crosslinking with Ca<sup>++</sup> and Zn<sup>++</sup> in the formation of gellan gum gels
title_full Effect of crosslinking with Ca<sup>++</sup> and Zn<sup>++</sup> in the formation of gellan gum gels
title_fullStr Effect of crosslinking with Ca<sup>++</sup> and Zn<sup>++</sup> in the formation of gellan gum gels
title_full_unstemmed Effect of crosslinking with Ca<sup>++</sup> and Zn<sup>++</sup> in the formation of gellan gum gels
title_sort Effect of crosslinking with Ca<sup>++</sup> and Zn<sup>++</sup> in the formation of gellan gum gels
dc.creator.none.fl_str_mv Verma, Anurag
Pandit, Jayant K.
Wahi, Arun K.
author Verma, Anurag
author_facet Verma, Anurag
Pandit, Jayant K.
Wahi, Arun K.
author_role author
author2 Pandit, Jayant K.
Wahi, Arun K.
author2_role author
author
dc.subject.none.fl_str_mv Farmacia
floating beads
gellan gum
penetration thickness
entrapment efficiency
water holding capacity
topic Farmacia
floating beads
gellan gum
penetration thickness
entrapment efficiency
water holding capacity
dc.description.none.fl_txt_mv This study involves an investigation of the effects of crosslinking of gellan gum (GG) with Ca<sup>++</sup> or Zn++ on the physical properties of GG gels. GG gels crosslinked with different concentrations of Ca<sup>++</sup> or Zn<sup>++</sup> were prepared and parameters such as % water holding capacity and penetration thickness were investigated as measures of the extent of interaction of Ca<sup>++</sup> or Zn<sup>++</sup> with GG molecules. Data generated from the above studies revealed that Zn<sup>++</sup> interacted with the GG molecules to a greater extent than Ca++ . In order to further strengthen our finding, we have prepared Zn<sup>++</sup> crosslinked and Ca<sup>++</sup> crosslinked floating GG beads respectively by ionotropic gelation in the presence of a gas-generating agent (NaHCO3 ) and compared their physico-chemical properties such as density, drug entrapment efficiency and release in 0.1 M HCl (pH 1.2) using metronidazole (MTZ) as a model drug. Experimental data suggested that Zn<sup>++</sup> crosslinked floating GG beads were denser and less buoyant than Ca<sup>++</sup> crosslinked floating beads but capable of significantly (p < 0.05) improving MTZ entrapment efficiency and sustaining the MTZ release in 0.1 M HCl (pH 1.2) compared to Ca++ crosslinked floating beads. The difference in observed behavior may be attributed to differences in specificity, soft and hard character, enthalpies of hydration and ionization potentials of Ca<sup>++</sup> and Zn<sup>++</sup> .
Colegio de Farmacéuticos de la Provincia de Buenos Aires
description This study involves an investigation of the effects of crosslinking of gellan gum (GG) with Ca<sup>++</sup> or Zn++ on the physical properties of GG gels. GG gels crosslinked with different concentrations of Ca<sup>++</sup> or Zn<sup>++</sup> were prepared and parameters such as % water holding capacity and penetration thickness were investigated as measures of the extent of interaction of Ca<sup>++</sup> or Zn<sup>++</sup> with GG molecules. Data generated from the above studies revealed that Zn<sup>++</sup> interacted with the GG molecules to a greater extent than Ca++ . In order to further strengthen our finding, we have prepared Zn<sup>++</sup> crosslinked and Ca<sup>++</sup> crosslinked floating GG beads respectively by ionotropic gelation in the presence of a gas-generating agent (NaHCO3 ) and compared their physico-chemical properties such as density, drug entrapment efficiency and release in 0.1 M HCl (pH 1.2) using metronidazole (MTZ) as a model drug. Experimental data suggested that Zn<sup>++</sup> crosslinked floating GG beads were denser and less buoyant than Ca<sup>++</sup> crosslinked floating beads but capable of significantly (p < 0.05) improving MTZ entrapment efficiency and sustaining the MTZ release in 0.1 M HCl (pH 1.2) compared to Ca++ crosslinked floating beads. The difference in observed behavior may be attributed to differences in specificity, soft and hard character, enthalpies of hydration and ionization potentials of Ca<sup>++</sup> and Zn<sup>++</sup> .
publishDate 2012
dc.date.none.fl_str_mv 2012
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/10915/25642
url http://sedici.unlp.edu.ar/handle/10915/25642
dc.language.none.fl_str_mv eng
language eng
dc.relation.none.fl_str_mv info:eu-repo/semantics/altIdentifier/url/http://www.latamjpharm.org/resumenes/31/6/LAJOP_31_6_1_4.pdf
info:eu-repo/semantics/altIdentifier/issn/0326-2383
dc.rights.none.fl_str_mv info:eu-repo/semantics/openAccess
Licencia de distribución no exclusiva SEDICI
eu_rights_str_mv openAccess
rights_invalid_str_mv Licencia de distribución no exclusiva SEDICI
dc.format.none.fl_str_mv application/pdf
815-820
dc.source.none.fl_str_mv reponame:SEDICI (UNLP)
instname:Universidad Nacional de La Plata
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reponame_str SEDICI (UNLP)
collection SEDICI (UNLP)
instname_str Universidad Nacional de La Plata
instacron_str UNLP
institution UNLP
repository.name.fl_str_mv SEDICI (UNLP) - Universidad Nacional de La Plata
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