Neutron scattering explains why gluten-free pasta falls apart (2025)
Recorded: May 23, 2026, 2:58 a.m.
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The science of spaghetti: Neutron scattering explains why gluten-free pasta falls apart Topics Week's top Latest news Unread news Subscribe Science X Account Sign In Sign in with Forget Password? Not a member? Learn more Nanotechnology Physics Earth Astronomy & Space Chemistry Biology Other Sciences Medicine Technology share this! 1 Tweet Share Home Nanotechnology Nanophysics Home Nanotechnology Nanomaterials September 8, 2025 The science of spaghetti: Neutron scattering explains why gluten-free pasta falls apart by Diamond Light Source edited by Editors' notes This article has been reviewed according to Science X's fact-checked trusted source proofread The GIST Add as preferred source Credit: Food Hydrocolloids (2025). DOI: 10.1016/j.foodhyd.2025.111855 Using small angle neutron and X-ray scattering, researchers from the European Spallation Source and RWTH Aachen University have compared the nanostructure of gluten-free and normal spaghetti, finding that the kind with gluten is much more forgiving to varied cooking conditions. Andrea Scotti from RWTH Aachen University, Judith Houston from the European Spallation Source (ESS) have worked with Nathan Cowieson from Diamond's B21 beamline and Greg Smith from ISIS as well as collaborators from the Institut Laue Langevin to study the nanostructure of spaghetti. More specifically, they were looking at the different structures created by gluten-free spaghetti, in comparison to gluten-containing spaghetti. The study is published in the journal Food Hydrocolloids. They also saw that salt not only affects the taste, but also the structural integrity. Adding salt preserved the structure of the spaghetti, but only when used at the right concentration, and if the pasta was cooked for the right length of time. More information Key concepts Provided by Citation: This document is subject to copyright. 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Researchers from the European Spallation Source and RWTH Aachen University, collaborating with others, utilized small angle neutron and X-ray scattering techniques to investigate the nanostructure differences between gluten-free and conventional spaghetti. The study aimed to explain why gluten-free pasta tends to disintegrate under varying cooking conditions compared to gluten-containing pasta. In conventional pasta, the structure is maintained by the interaction between starch and gluten; starch forms expandable, ball-like structures, while gluten forms a stringy mesh that tangles around these starch balls, thereby preventing the starch from falling apart when heated and expanded. Gluten-free alternatives lack this gluten network, which allows the starch granules to over-swell, resulting in the pasta becoming sticky or falling apart, particularly when cooked for extended periods. The experimental methodology involved comparing the structure of spaghetti across different stages—raw, boiled for various times, and boiled with salt—using both X-ray and neutron scattering. To effectively isolate the effects of starch and gluten, the team experimented with mixtures of hydrogen oxide and heavy water deuterium oxide, allowing them to selectively observe the behavior of different molecular components. The neutron experiments, conducted in D2O, further demonstrated the distinct behaviors of the components during cooking. Specifically, the starch granules were observed to swell and disperse upon heating, whereas the gluten proteins coagulated to form a dense network that effectively trapped the starch, thus preserving the pasta's structural integrity. The research also examined the role of salt, finding that it influences structural integrity; salt can preserve the pasta's structure, but this effect is contingent upon using the correct concentration and cooking duration. The findings suggest that the structural stability of pasta is fundamentally dependent on the architecture provided by the gluten network interacting with the expanded starch matrix. Future research plans by the team involve expanding these investigations to study the structural variations in pasta shapes and manufacturing processes, as well as examining the structural effects experienced by the pasta once consumed in the stomach. |