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dc.contributor.authorSabando, Constanza
dc.contributor.authorIde, Walther
dc.contributor.authorRodríguez-Llamazares, Saddys
dc.contributor.authorBastías, Richard
dc.contributor.authorValenzuela, Miguel
dc.contributor.authorRojas, Claudio
dc.contributor.authorCastaño, Johanna
dc.contributor.authorPettinelli, Natalia
dc.contributor.authorBouza, Rebeca
dc.contributor.authorMüller, Niels
dc.date.accessioned2022-07-12T09:58:05Z
dc.date.available2022-07-12T09:58:05Z
dc.date.issued2022
dc.identifier.citationSabando, C.; Ide, W.; Rodríguez-Llamazares, S.; Bastías, R.M.; Valenzuela, M.; Rojas, C.; Castaño, J.; Pettinelli, N.; Bouza, R.; Müller, N. Preparation of Poly(vinyl Alcohol) Microparticles for Freeze Protection of Sensitive Fruit Crops. Polymers 2022, 14, 2452. https://doi.org/10.3390/polym14122452es_ES
dc.identifier.issn2073-4360
dc.identifier.urihttp://hdl.handle.net/2183/31163
dc.description.abstract[Abstract] Poly(vinyl alcohol) (PVA) displays ice recrystallization inhibition (IRI) properties as many antifreeze proteins found in cold tolerant organisms. The molecular architecture and composition (molecular weight and distribution of pendant OH and acetate groups) have been studied to improve the antifreezing properties of PVA, suggesting that the molecular architecture of PVA plays an important role in IRI activity. The present work deals with the preparation of PVA microparticles using an alkaline treatment. The effect of PVA molecular weight on the morphology and antifreezeing properties of PVA microparticles was investigated. The antifreezeing property of PVA microparticles on the susceptibility of flower bud tissues to freeze damage was also evaluated. The alkaline treatment of an aqueous PVA solution produced stable polymer chain aggregates with spherical shapes. The average size of the PVA microparticles increased significantly with the increasing molecular weight of the PVA macromolecule precursor. The PVA microparticles inhibited the growth of ice crystals and blocked ice growth at concentrations as low as 0.01 % w/v. The effect of impeding ice crystal growth by preventing the joining of adjacent ice crystals is attributed to the larger size of the PVA particles adsorbed on the ice surface compared to the aggregated PVA macromolecules in saline solution. The thermal hysteresis activity of PVA macromolecules and microparticles was not detected by differential scanning calorimetry analysis. The PVA microparticles reduced the incidence of freeze injuries in flower bud tissues by 55% and their application, considering the low toxicity of PVA, has a high potential for freeze protection in fruit crops.es_ES
dc.description.sponsorshipChile. Comisión Nacional de Investigación Científica y Tecnológica; ID16I10425es_ES
dc.description.sponsorshipChile. Comisión Nacional de Investigación Científica y Tecnológica; ID16I20425es_ES
dc.description.sponsorshipChile. Gobierno Regional del Biobío; R17A10003es_ES
dc.description.sponsorshipChile. Agencia Nacional de Investigación y Desarrollo; ACE210016es_ES
dc.description.sponsorshipChile. Agencia Nacional de Investigación y Desarrollo; ACE210012es_ES
dc.description.sponsorshipChile. Comisión Nacional de Investigación Científica y Tecnológica; AFB170007es_ES
dc.description.sponsorshipThis research was funded by projects CONICYT + FONDEF/tercer concurso IDeA en Dos Etapas del Fondo al Desarrollo Científico Y Tecnológico, FONDEF/CONICYT 2016 [grant numbers ID16I10425 and ID16I20425], CIPA, ANID Regional, GORE BIO BIO [grant number: R17A10003], ANID [grant numbers: ACE210016 and ACE210012] and CONICYT PIA/APOYO CCTE [grant number: AFB170007]
dc.language.isoenges_ES
dc.publisherMDPIes_ES
dc.relation.urihttps://doi.org/10.3390/polym14122452es_ES
dc.rightsAttribution (CC BY) licensees_ES
dc.rights.urihttps://creativecommons.org/licenses/by/4.0/*
dc.subjectPVA microparticleses_ES
dc.subjectIce recrystallization inhibitiones_ES
dc.subjectFreeze injuryes_ES
dc.subjectCherry plantses_ES
dc.titlePreparation of Poly(vinyl Alcohol) Microparticles for Freeze Protection of Sensitive Fruit Cropses_ES
dc.typeinfo:eu-repo/semantics/articlees_ES
dc.rights.accessinfo:eu-repo/semantics/openAccesses_ES
UDC.journalTitlePolymerses_ES
UDC.volume14es_ES
UDC.issue12es_ES
UDC.startPage1es_ES
UDC.endPage12es_ES
dc.identifier.doi10.3390/polym14122452


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