Characterization of branched limit dextrin and impact on corn starch pasting properties

Characterization of branched limit dextrin and impact on corn starch pasting properties Branched limit dextrins (BLDs) are composed of linear chains of alpha-(1,4)- d-glucose residues connected through alpha-(1,6)-linkages. In this work, BLDs were prepared by hydrolysis of starch by alpha- and beta-amylases and subsequent ethanol precipitation into fractions of different molecular weights and structures. The characterization of BLDs was done using matrix-assisted laser desorption/ionization time-of-flight mass spectrometry and 1H nuclear magnetic resonance spectroscopy. The average molecular weights of BLDs from both corn and waxy corn starches decreased upon an increase in ethanol concentration from 70% to 90%, that is, from 1918.30 to 1274.23 and from 1938.11 to 1356.35, while the ratio of alpha-(1,4) to alpha-(1,6) glycosidic linkages increased from both corn (from 5.27 to 8.46) and waxy corn starches (from 3.80 to 4.62). The effect of BLDs with different degrees of polymerization on the pasting properties of corn starch was investigated by rapid visco-analysis (RVA). Confocal laser scanning microscopy (CLSM) observation of the BLD/cornstarch mixtures was also carried out to explore the possible interaction between corn starch and BLDs. RVA showed that BLDs significantly changed the viscosity parameters of the BLD/cornstarch mixtures. The results of CLSM observation of samples further indicate that the cornstarch and BLDs interacted in the cornstarch–BLD system because of the low molecular weight and mobility of BLDs. http://www.deepdyve.com/assets/images/DeepDyve-Logo-lg.png Food Hydrocolloids Elsevier

Characterization of branched limit dextrin and impact on corn starch pasting properties

Loading next page...
 
/lp/elsevier/characterization-of-branched-limit-dextrin-and-impact-on-corn-starch-tWWexw3dT4
Publisher
Elsevier
Copyright
Copyright © 2017 Elsevier Ltd
ISSN
0268-005X
eISSN
1873-7137
D.O.I.
10.1016/j.foodhyd.2017.12.005
Publisher site
See Article on Publisher Site

Abstract

Branched limit dextrins (BLDs) are composed of linear chains of alpha-(1,4)- d-glucose residues connected through alpha-(1,6)-linkages. In this work, BLDs were prepared by hydrolysis of starch by alpha- and beta-amylases and subsequent ethanol precipitation into fractions of different molecular weights and structures. The characterization of BLDs was done using matrix-assisted laser desorption/ionization time-of-flight mass spectrometry and 1H nuclear magnetic resonance spectroscopy. The average molecular weights of BLDs from both corn and waxy corn starches decreased upon an increase in ethanol concentration from 70% to 90%, that is, from 1918.30 to 1274.23 and from 1938.11 to 1356.35, while the ratio of alpha-(1,4) to alpha-(1,6) glycosidic linkages increased from both corn (from 5.27 to 8.46) and waxy corn starches (from 3.80 to 4.62). The effect of BLDs with different degrees of polymerization on the pasting properties of corn starch was investigated by rapid visco-analysis (RVA). Confocal laser scanning microscopy (CLSM) observation of the BLD/cornstarch mixtures was also carried out to explore the possible interaction between corn starch and BLDs. RVA showed that BLDs significantly changed the viscosity parameters of the BLD/cornstarch mixtures. The results of CLSM observation of samples further indicate that the cornstarch and BLDs interacted in the cornstarch–BLD system because of the low molecular weight and mobility of BLDs.

Journal

Food HydrocolloidsElsevier

Published: Jun 1, 2018

References

You’re reading a free preview. Subscribe to read the entire article.


DeepDyve is your
personal research library

It’s your single place to instantly
discover and read the research
that matters to you.

Enjoy affordable access to
over 18 million articles from more than
15,000 peer-reviewed journals.

All for just $49/month

Explore the DeepDyve Library

Search

Query the DeepDyve database, plus search all of PubMed and Google Scholar seamlessly

Organize

Save any article or search result from DeepDyve, PubMed, and Google Scholar... all in one place.

Access

Get unlimited, online access to over 18 million full-text articles from more than 15,000 scientific journals.

Your journals are on DeepDyve

Read from thousands of the leading scholarly journals from SpringerNature, Elsevier, Wiley-Blackwell, Oxford University Press and more.

All the latest content is available, no embargo periods.

See the journals in your area

DeepDyve

Freelancer

DeepDyve

Pro

Price

FREE

$49/month
$360/year

Save searches from
Google Scholar,
PubMed

Create lists to
organize your research

Export lists, citations

Read DeepDyve articles

Abstract access only

Unlimited access to over
18 million full-text articles

Print

20 pages / month

PDF Discount

20% off