The supporting effect of ultrasound on the acid hydrolysis of granular potato starch.
Carbohydr Polym
; 230: 115633, 2020 Feb 15.
Article
em En
| MEDLINE
| ID: mdl-31887911
ABSTRACT
The modification of starch owing to acid-thinning (AT) is intensified by a concomitant ultrasound (US) treatment, but the specific effect of the US on molecular changes, and the respective contribution of the single impacts are still unknown. The present study investigates the supporting effect of the US via examination and comparison of the single modifications [general conditions starch slurry (40 % w/w), 40 °C, stirring; US gradation of amplitude (50 and 100 %), cycle (0.50 and 0.75) and sonication time (20 and 60 min); AT 0.36 M HCl, reaction time of 4 h] with the corresponding US assisted AT modified starches (US-AT) in terms of granular, molecular and functional properties. The US induced essentially a molecular degradation (debranching) of the amylopectin (AP), whereas chain cleavage within the amylose (AM) wasn't excluded completely. Altogether, the US was estimated to be a separate and assisting modification rather than an AT accelerating component.
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Coleções:
01-internacional
Base de dados:
MEDLINE
Idioma:
En
Revista:
Carbohydr Polym
Ano de publicação:
2020
Tipo de documento:
Article