To provide more insight into the cation facilitated pectin-gel structure-function relationship, the microstructure of pectin-gels was explored using cryo-scanning electron microscopy (Cryo-SEM) in combination with physiochemical and rheological analysis. Pectin with different degrees of methylesterification, DM, was obtained from commercial citrus pectin (CP) and sugar beet pectin (SBP) by action of carrot pectin methylesterase. Pectin characterisation confirmed that pectin properties other than DM were unaltered and pectin from the two sources exhibited different structures. Cryo-SEM visualisation of pectin-gels prepared with different cations revealed that the network density increased with decreasing DM and increasing pH, pectin and cation-concentration. At a given DM, the more linear and less acetylated pectin (CP) exhibited a more intertwined fibrous network compared to the highly branched and more acetylated pectin (SBP). Furthermore, gel-microstructure was influenced by type of cation with Zn2+, Fe2+ and Ca2+-pectin gels showing a more intertwined network compared to Mg2+-pectin gels. Finally, rheological properties of gels complementing Cryo-SEM observations showed that as the network density increased, the gel-stiffness (G′) increased.
Food Hydrocolloids – Elsevier
Published: Dec 1, 2016
It’s your single place to instantly
discover and read the research
that matters to you.
Enjoy affordable access to
over 12 million articles from more than
10,000 peer-reviewed journals.
All for just $49/month
Read as many articles as you need. Full articles with original layout, charts and figures. Read online, from anywhere.
Keep up with your field with Personalized Recommendations and Follow Journals to get automatic updates.
It’s easy to organize your research with our built-in tools.
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.
“Hi guys, I cannot tell you how much I love this resource. Incredible. I really believe you've hit the nail on the head with this site in regards to solving the research-purchase issue.”Daniel C.
“Whoa! It’s like Spotify but for academic articles.”@Phil_Robichaud
“I must say, @deepdyve is a fabulous solution to the independent researcher's problem of #access to #information.”@deepthiw
“My last article couldn't be possible without the platform @deepdyve that makes journal papers cheaper.”@JoseServera