VIDEO: 3D image of the microstructure of potato chip made from potato flakes determined by X-ray micro-computed tomography.
The study - published in the journal Nature Food - “resulted from a collaboration between ourselves [researchers at KU Leuven University in Flanders, Belgium], scientists from the Kellogg Company, and to a lesser extent, Yangzhou University,” co-author Jan Delcour, PhD, a professor of food science at KU Leuven, told FoodNavigator-USA.
“The work is an excellent example of the triple helix approach to innovation in which academia, industry, and a government agency [Flanders Innovation & Entrepreneurship] collaborate to create value for society.”
The fine structure of extractable amylose in potato flakes dictates oil uptake
The researchers focused on deep-fried chips such as Pringles that are manufactured from sheets of dough made from potato flakes (rather than regular potato chips made from thinly sliced whole potatoes).
They found that the fine structure of extractable amylose (a type of starch) in potato flakes dictates oil uptake during frying, and thus their caloric density.
“We found that higher levels of short extractable amylose chains increase dough strength,” said Dr Delcour.
“The strong amylose networks in these dough sheets slow down water evaporation during deep-frying, which in turn reduces product expansion and oil uptake.”
Basically, he observed, any approach that would result in an increased level of short extractable amylose chains in potato flakes should result in these effects.
“One way of doing so, as shown in the Nature Food publication, is by selecting potato flakes that already contain high levels of these extractable amylose chains.” [The reason why some flakes contain higher levels is twofold, he said: specific potato cultivars may contain higher levels, while the potato flake production process may induce the release of more of these chains into the extracellular space.]
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December 07, 2020 at 11:59PM
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New research highlights opportunity to slash fat in Pringles-style potato chips - FoodNavigator-USA.com
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