Isolated starches from yams (Dioscorea sp) grown at the Venezuelan Amazons: structure and functional properties.
Carbohydr Polym
; 98(1): 650-8, 2013 Oct 15.
Article
em En
| MEDLINE
| ID: mdl-23987395
This work aimed to characterize the molecular structure and functional properties of starches isolated from wild Dioscorea yams grown at the Amazons, using conventional and up-to-date methodologies. Among the high purity starches isolated (≥99%), the chain lengths were similar, whereas variations in gelatinization profile were observed. Starches have shown varied-shaped granules with monomodal distribution, and B-type crystallinity. Variations in amylose contents found by three analyses were hypothesized being related to intermediate material. Linear chain lengths were similar, and their amylopectins showed a dense, spherical conformation and similar molecular characteristics. The average molar mass and the radius of gyration of the chromatograms of the yam amylopectin, M¯W and R¯G were ranging between 174×10(6) g mol(-1) and 237×10(6) g mol(-1), and 201 nm and 233 nm, respectively. The white yams starches were more sensible to enzymes than the other two. All starches have shown a wide range of functional and nutritional properties.
Palavras-chave
Texto completo:
1
Coleções:
01-internacional
Base de dados:
MEDLINE
Assunto principal:
Amido
/
Dioscorea
País/Região como assunto:
America do sul
/
Venezuela
Idioma:
En
Revista:
Carbohydr Polym
Ano de publicação:
2013
Tipo de documento:
Article
País de afiliação:
Venezuela
País de publicação:
Reino Unido