Publicación:
HEAT-INDUCED CHANGES IN MICROSTRUCTURE OF SPRAY-DRIED PLANT PROTEIN ISOLATES AND ITS IMPLICATIONS ON IN VITRO GASTRIC DIGESTION

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dc.creatorYAMIRA CEPERO BETANCOURT
dc.creatorGIPSY ELIZABETH TABILO MUNIZAGA
dc.date2020
dc.date.accessioned2025-01-10T15:09:41Z
dc.date.available2025-01-10T15:09:41Z
dc.date.issued2020
dc.description.abstractTHE QUICKLY EXPANDING FIELD OF PLANT-BASED FOOD, GENERALLY USES PROTEIN CONCENTRATES OR ISOLATES AS PROTEIN SOURCE. IT IS HOWEVER NOT CLEAR TO WHAT EXTENT THE INTENSIVE PROCESSING OF THESE RAW MATERIALS AFFECTS THEIR DIGESTIBILITY. WE HERE REPORT ON THE IN VITRO GASTRIC DIGESTIBILITY OF THE STRUCTURES PRESENT IN UNHEATED AND HEATED DISPERSIONS OF SPRAY-DRIED PROTEIN ISOLATES OF SOYBEAN AND YELLOW PEA. UNHEATED DISPERSIONS CONSIST PRIMARILY OF INSOLUBLE INDIVIDUAL SPRAY-DRIED PARTICLES, AGGLOMERATES OF THESE AND ONLY A SMALL FRACTION OF SOLUBLE PROTEIN. PEPSIN ACTIVITY WAS FOLLOWED IN REAL-TIME THROUGH MICROSCOPIC OBSERVATIONS, SHOWING THE DISASSOCIATION OF AGGLOMERATES AND INWARD-BREAKDOWN OF INDIVIDUAL PARTICLES, WHICH ARE OTHERWISE STABLE AT GASTRIC PH AND IONIC STRENGTH. THIS DEMONSTRATES THAT SOLUBILITY IS NOT NECESSARILY AN INCENTIVE FOR GASTRIC PROTEIN DIGESTION. HEATING DOES NOT SIGNIFICANTLY AFFECT THE OVERALL DIGESTIBILITY OF PROTEIN ISOLATE DISPERSIONS. NEVERTHELESS, HEATING DISRUPTS THE STRUCTURE OF SPRAY-DRIED PARTICLES, INCREASING THE AMOUNT OF SMALLER AND BETTER DIGESTIBLE PARTICLES THAT REMAIN SUSPENDED AFTER CENTRIFUGATION. CONVERSELY, HEAT-INDUCED AGGREGATES REMAIN IN THE PELLET AND ARE UP TO 50% LESS DIGESTIBLE THAN THEIR UNHEATED COUNTERPARTS. THIS IMPAIRED DIGESTIBILITY IS COUNTERBALANCED BY A REDUCED PROPORTION OF POORLY-DIGESTIBLE SPECIES IN THE FULL SYSTEM (UP TO 11% FOR SOY AND 23% FOR PEA).
dc.formatapplication/pdf
dc.identifier.doi10.1016/j.lwt.2019.108795
dc.identifier.issn1096-1127
dc.identifier.issn0023-6438
dc.identifier.urihttps://repositorio.ubiobio.cl/handle/123456789/10710
dc.languagespa
dc.publisherLWT-FOOD SCIENCE AND TECHNOLOGY
dc.relation.uri10.1016/j.lwt.2019.108795
dc.rightsPUBLICADA
dc.titleHEAT-INDUCED CHANGES IN MICROSTRUCTURE OF SPRAY-DRIED PLANT PROTEIN ISOLATES AND ITS IMPLICATIONS ON IN VITRO GASTRIC DIGESTION
dc.title.alternativeCAMBIOS INDUCIDOS POR EL CALOR EN LA MICROESTRUCTURA DE LOS AISLADOS DE PROTEÍNA VEGETAL SECADOS POR PULVERIZACIÓN Y SUS IMPLICACIONES EN LA DIGESTIÓN GÁSTRICA IN VITRO
dc.typeARTÍCULO
dspace.entity.typePublication
ubb.EstadoPUBLICADA
ubb.Otra ReparticionDEPARTAMENTO DE INGENIERIA EN ALIMENTOS
ubb.Otra ReparticionDEPARTAMENTO DE INGENIERIA EN ALIMENTOS
ubb.SedeCHILLÁN
ubb.SedeCHILLÁN
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