A photographic approach to the possible mechanism of retrogradation of sweet potato starch.
Int J Biol Macromol
; 48(1): 125-8, 2011 Jan 01.
Article
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| MEDLINE
| ID: mdl-20969889
ABSTRACT
Although the subject of starch retrogradation has been studied for about 20 years, the mechanism of starch retrogradation seems not yet to be completely established. In this paper, the possible retrogradation mechanism of sweet potato starch was postulated from four optical micrographs at the stages of melting of the starch granules, autoclaving treatment and aging. The possible process of retrogradation consists of three stages. Firstly, starch granules was swelled and melted with loss of X-ray crystallinity and formation of both crystalline and amorphous lamellae; secondly, in crystalline lamellae, amylopectin began to form nucleation when they were autoclaved; finally, the nucleus grew up to great rod-like crystals as the result of congregating of amylose on plates which were composed of and prolongated by amylopectin.
Texto completo:
1
Colección:
01-internacional
Banco de datos:
MEDLINE
Asunto principal:
Almidón
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Ipomoea batatas
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Microscopía
Idioma:
En
Revista:
Int J Biol Macromol
Año:
2011
Tipo del documento:
Article