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Effects of amylose and amylopectin molecular structures on starch electrospinning
Carbohydrate Polymers, 2022The role of amylose content in electrospinning starch nanofibres is well understood, but that is not the case for the roles of the molecular structures of amylose and amylopectin. Here, correlations between starch molecular-structure parameters and electrospinnability evaluation indices (average droplet number, average bead number, and average fibre ...
Cao, Panpan +8 more
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Development and characterization of potato amylopectin-substituted starch materials
Food Science and Biotechnology, 2021This study characterized the blends of corn starch with potato amylopectin (PAP) and PAP hydrolysates treated with branching enzyme (BR), pullulanase (PL), and BR-BL cocktail. PAP/PAP hydrolysates were deposited or bound (particularly in intact and PL-treated PAPs) on the surfaces of corn starch granules. Although PAP/PAP hydrolysates rarely affect the
Ree Jae Kim, Hyun-Seok Kim
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Determination of Amylose: Amylopectin Ratios of Starches
Starch - Stärke, 1981AbstractA method has been developed for the determination of amylose: amylopectin ratios of starches which offers an alternative to iodimetric methods. Starches solubilized in dimethylsulphoxide were debranched with isoamylase and the resulting linear components quantitated by gel permeation chromatography on a column of Sepharose CL‐6B.
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Molecular weight heterogeneity in starch amylopectins
Journal of Polymer Science, 1957AbstractThe number‐average molecular weight of a corn amylopectin sample is concluded to be approximately 300,000 on basis of both osmotic pressure and reducing group determination. The weight‐average molecular weight of this preparation was previously shown to be approximately 80 × 106.
Carl J. Stacy, Joseph F. Foster
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Evolution of amylopectin structure in developing wheat endosperm starch
Carbohydrate Polymers, 2014In this study, starches extracted from wheat grains harvested at 7, 14, 28, and 35 days after anthesis (DAA) were used as a means of examining the molecular structure of amylopectin (AP) from developing wheat grain. Scanning electron microscopy of wheat grain cross-sections revealed the presence of endosperm at 7 DAA and contained lenticular-shaped ...
Danusha N, Kalinga +5 more
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Effects of the amylose–amylopectin ratio on starch–hydrocolloid interactions
Carbohydrate Polymers, 2013Combinations of 4 rice starches with amylose (AM) contents of 0%, 15%, 22%, and 28% and 8 hydrocolloids (xanthan, guar gum, CMC, sodium alginate, HPMC, κ-, ι-, λ-carrageenan) were used (4.75% starch and 0.25% hydrocolloid). With a few exceptions, addition of a hydrocolloid increased peak and final η, breakdown, setback, G″, and η(*), K, and ηa,100 ...
Hyun-Seok, Kim +2 more
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A review of starch‐branching enzymes and their role in amylopectin biosynthesis
IUBMB Life, 2014AbstractStarch‐branching enzymes (SBEs) are one of the four major enzyme classes involved in starch biosynthesis in plants and algae, and their activities play a crucial role in determining the structure and physical properties of starch granules. SBEs generate α‐1,6‐branch linkages in α‐glucans through cleavage of internal α‐1,4 bonds and transfer of ...
Ian J, Tetlow, Michael J, Emes
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Structure of Starch: Mode of Attachment of the Side-chains in Amylopectin
Nature, 1947Estimations of the proportion of glucose residues present as end-groups in the amylopectin component of starch have shown that some 5 per cent of the glucose residues occur as terminal groups. Since amylopectin has a high molecular weight, of the order of 106, a branched-chain structure must be present in the molecule.
T. G. HALSALL +3 more
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Amylopectin Starch Promotes the Development of Insulin Resistance in Rats
The Journal of Nutrition, 1995Starches that are high in amylopectin are digested and absorbed more quickly than starches with a high amylose content and produce larger postprandial glucose and insulin responses. The aim of this study was to test the hypothesis that feeding rats a diet containing quickly digested starch could promote insulin resistance.
S E, Byrnes, J C, Miller, G S, Denyer
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Surface Composition and Morphology of Starch, Amylose, and Amylopectin Films
Biomacromolecules, 2002The surfaces of solution-cast films of starch, amylose, and amylopectin were examined with scanning electron microscopy (SEM), atomic force microscopy (AFM), electron spectroscopy for chemical analysis (ESCA), and time-of-flight secondary ion mass spectrometry (ToF-SIMS).
Asa, Rindlav-Westling, Paul, Gatenholm
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