Performance of alginate films for retention of l-[+]-ascorbic acid
In view of acting as controlled delivery systems for nutritional supplementation, therapy or antioxidant activity at interfaces, alginate films of different copolymer composition and glycerol plasticizer levels were developed in the presence of Ca2+ for achieving higher stability of l-[+]-ascorbic a...
| Otros Autores: | , , , , , |
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| Formato: | Artículo |
| Lenguaje: | Inglés |
| Materias: | |
| Acceso en línea: | http://ri.agro.uba.ar/files/intranet/articulo/2013denobili.pdf LINK AL EDITOR |
| Aporte de: | Registro referencial: Solicitar el recurso aquí |
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| 024 | |a 10.1016/j.ijpharm.2013.04.027 | ||
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| 245 | 1 | 0 | |a Performance of alginate films for retention of l-[+]-ascorbic acid |
| 520 | |a In view of acting as controlled delivery systems for nutritional supplementation, therapy or antioxidant activity at interfaces, alginate films of different copolymer composition and glycerol plasticizer levels were developed in the presence of Ca2+ for achieving higher stability of l-[+]-ascorbic acid [AA]. The ability of the alginate network to preserve AA from hydrolysis, tested by storage under vacuum at 25 C, only decreased with the relative humidity [RH] increase when alginates were mainly constituted by guluronic-guluronic acid blocks [GG], whereas also decreased with the glycerol level increase when mannuronic-mannuronic acid [MM] and/or alternating guluronic-mannuronic [GM + MG] flexible blocks were present in higher proportions. This result could be probably related to the lower capability of the latter alginate block compositions to immobilize water in the network as they are not able to constitute Ca2+ mediated junction zones where water molecules are highly retained. Films also studied under air storage showed that even at less favorable conditions of RH and glycerol levels, both GG and GM + MG enriched alginate networks in general preserved AA from oxidation. It also demonstrated that hydrolysis is the principal way by which AA is lost when supported in films. | ||
| 653 | 0 | |a ALGINATE FILMS | |
| 653 | 0 | |a ANTIOXIDANT INTERFACE | |
| 653 | 0 | |a ASCORBIC ACID HYDROLYSIS | |
| 653 | 0 | |a BIOMOLECULE DELIVERY | |
| 653 | 0 | |a GLYCEROL | |
| 653 | 0 | |a ALGINIC ACID | |
| 653 | 0 | |a ASCORBIC ACID | |
| 653 | 0 | |a CALCIUM ALGINATE | |
| 653 | 0 | |a MANNURONIC ACID | |
| 653 | 0 | |a WATER | |
| 653 | 0 | |a DRUG HYDROLYSIS | |
| 653 | 0 | |a DRUG STABILITY | |
| 653 | 0 | |a HUMIDITY | |
| 653 | 0 | |a MOLECULE | |
| 653 | 0 | |a TEMPERATURE | |
| 653 | 0 | |a ALGINATES | |
| 653 | 0 | |a DRUG STORAGE | |
| 653 | 0 | |a HYDROLYSIS | |
| 653 | 0 | |a OXIDATION-REDUCTION | |
| 653 | 0 | |a PLASTICIZERS | |
| 700 | 1 | |a De Nobili, María D. |9 70150 | |
| 700 | 1 | |a Curto, Lucrecia M. |9 72599 | |
| 700 | 1 | |a Delfino, José María |9 72600 | |
| 700 | 1 | |9 49057 |a Soria, Marcelo Abel | |
| 700 | 1 | |a Fissore, Eliana N. |9 68705 | |
| 700 | 1 | |a Rojas, Ana M. |9 70153 | |
| 773 | |t International Journal of Pharmaceutics |g vol.450, no.1-2 (2013), p.95-103 | ||
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| 856 | |u http://www.elsevier.com/ |x MIGRADOS2018 |z LINK AL EDITOR | ||
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| 900 | |a 10.1016/j.ijpharm.2013.04.027 | ||
| 900 | |a ^tPerformance of alginate films for retention of l-[+]-ascorbic acid | ||
| 900 | |a ^aDe'Nobili^bM.D. | ||
| 900 | |a ^aCurto^bL.M. | ||
| 900 | |a ^aDelfino^bJ.M. | ||
| 900 | |a ^aSoria^bM. | ||
| 900 | |a ^aFissore^bE.N. | ||
| 900 | |a ^aRojas^bA.M. | ||
| 900 | |a ^aDe'Nobili^bM. D. | ||
| 900 | |a ^aCurto^bL. M. | ||
| 900 | |a ^aDelfino^bJ. M. | ||
| 900 | |a ^aSoria^bM. A. | ||
| 900 | |a ^aFissore^bE. N. | ||
| 900 | |a ^aRojas^bA. M. | ||
| 900 | |a ^aDe'Nobili, M.D.^tDepartamento de Industrias, Facultad de Ciencias Exactas y Naturales, University of Buenos Aires, 1428 Buenos Aires, Argentina | ||
| 900 | |a ^aCurto, L.M.^tDepartment of Biological Chemistry, Institute of Biochemistry and Biophysics - IQUIFIB (CONICET), University of Buenos Aires, Junín 956, 1113 Buenos Aires, Argentina | ||
| 900 | |a ^aDelfino, J.M.^tDepartment of Biological Chemistry, Institute of Biochemistry and Biophysics - IQUIFIB (CONICET), University of Buenos Aires, Junín 956, 1113 Buenos Aires, Argentina | ||
| 900 | |a ^aSoria, M.^tMicrobiologia Agricola, Instituto de Investigaciones en Biociencias Agricolas y Ambientales - INBA, Facultad de Agronomía, University of Buenos Aires, Av. San Martin 4453, 1417 Buenos Aires, Argentina | ||
| 900 | |a ^aFissore, E.N.^tDepartamento de Industrias, Facultad de Ciencias Exactas y Naturales, University of Buenos Aires, 1428 Buenos Aires, Argentina | ||
| 900 | |a ^aRojas, A.M.^tDepartamento de Industrias, Facultad de Ciencias Exactas y Naturales, University of Buenos Aires, 1428 Buenos Aires, Argentina | ||
| 900 | |a ^tInternational Journal of Pharmaceutics^cInt. J. Pharm. | ||
| 900 | |a en | ||
| 900 | |a 95 | ||
| 900 | |a ^i | ||
| 900 | |a Vol. 450, no. 1-2 | ||
| 900 | |a 103 | ||
| 900 | |a ALGINATE FILMS | ||
| 900 | |a ANTIOXIDANT INTERFACE | ||
| 900 | |a ASCORBIC ACID HYDROLYSIS | ||
| 900 | |a BIOMOLECULE DELIVERY | ||
| 900 | |a GLYCEROL | ||
| 900 | |a ALGINIC ACID | ||
| 900 | |a ASCORBIC ACID | ||
| 900 | |a CALCIUM ALGINATE | ||
| 900 | |a MANNURONIC ACID | ||
| 900 | |a WATER | ||
| 900 | |a DRUG HYDROLYSIS | ||
| 900 | |a DRUG STABILITY | ||
| 900 | |a HUMIDITY | ||
| 900 | |a MOLECULE | ||
| 900 | |a TEMPERATURE | ||
| 900 | |a ALGINATES | ||
| 900 | |a DRUG STORAGE | ||
| 900 | |a HYDROLYSIS | ||
| 900 | |a OXIDATION-REDUCTION | ||
| 900 | |a PLASTICIZERS | ||
| 900 | |a In view of acting as controlled delivery systems for nutritional supplementation, therapy or antioxidant activity at interfaces, alginate films of different copolymer composition and glycerol plasticizer levels were developed in the presence of Ca2+ for achieving higher stability of l-[+]-ascorbic acid [AA]. The ability of the alginate network to preserve AA from hydrolysis, tested by storage under vacuum at 25 C, only decreased with the relative humidity [RH] increase when alginates were mainly constituted by guluronic-guluronic acid blocks [GG], whereas also decreased with the glycerol level increase when mannuronic-mannuronic acid [MM] and/or alternating guluronic-mannuronic [GM + MG] flexible blocks were present in higher proportions. This result could be probably related to the lower capability of the latter alginate block compositions to immobilize water in the network as they are not able to constitute Ca2+ mediated junction zones where water molecules are highly retained. Films also studied under air storage showed that even at less favorable conditions of RH and glycerol levels, both GG and GM + MG enriched alginate networks in general preserved AA from oxidation. It also demonstrated that hydrolysis is the principal way by which AA is lost when supported in films. | ||
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