Understanding the fine structure of intermediate materials of maize starches.
Food Chem
; 233: 450-456, 2017 Oct 15.
Article
em En
| MEDLINE
| ID: mdl-28530598
ABSTRACT
Here we concern the molecular fine structure of intermediate material (IM) fraction in regular maize starch (RMS) and Starpro 40 maize starch (S40). IM had a branching degree and a molar mass (Mw) somewhere between amylopectin (AP) and amylose (AM). Compared with AP, IM had more extra-long (Fr I) and long (Fr II) chains and fb3-chains (degree of polymerization (DP)>36), with a higher average chain length (CL). Also, IM contained less A-chains but more B-chains (both BS-chains with DP 3-25 and BL-chains with DP≥26), accompanied by longer B- and BL-chains, total internal chains (TICL) and average internal chains (ICL), and a similar average external chain length (ECL). Furthermore, relative to RMS-IM, the IM of S40 (with higher apparent amylose content than RMS) showed increases in relatively-long chains, e.g., Fr II, fb3-chains and BL-chains, but reductions in Mw, relatively-short chains (those with DP 6-12, etc.).
Palavras-chave
Amylopectin; Amylopectin (PubChem CID: 439207); Amylose; Dimethyl sulfoxide (PubChem CID: 679); Fine structure; Intermediate material; Isoamyl alcohol (PubChem CID: 31260); Sodium Azide (PubChem CID: 33557); Sodium acetate (PubChem CID: 517045); Starch; Starch (PubChem: CID24836924); Water (PubChem CID: 962); n-Butanol (PubChem CID: 263)
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1
Base de dados:
MEDLINE
Assunto principal:
Amido
/
Zea mays
Idioma:
En
Ano de publicação:
2017
Tipo de documento:
Article