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Home»News»Integrating small-angle neutron scattering with machine learning enhances measurements of complex molecular structures
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Integrating small-angle neutron scattering with machine learning enhances measurements of complex molecular structures

July 22, 2024No Comments2 Mins Read
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Integrating small-angle neutron scattering with machine learning enhances measurements of complex molecular structures
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Graphic abstract. Credit: The European Physical Journal E (2024). DOI: 10.1140/epje/s10189-024-00435-6

Small-angle scattering (SAS) is a powerful technique for studying nanoscale samples. So far, however, its use in research has been held back by its inability to operate without some prior knowledge of a sample’s chemical composition. Through new research published in The European Physical Journal E, Eugen Anitas at the Bogoliubov Laboratory of Theoretical Physics in Dubna, Russia, presents a more advanced approach, which integrates SAS with machine learning algorithms.

Named α-SAS, the technique can analyze molecular samples without any need for extensive preparation or computing resources, and could enable researchers to gain more detailed insights into the properties of complex biomolecules: such as proteins, lipids, and carbohydrates.

SAS measures the deflection of radiation—typically X-rays or neutrons—after interacting with molecular structures suspended in a solvent. By adjusting the solvent’s composition, researchers can enhance or diminish the visibility of certain components of the system: a technique named “contrast variation.” For this to work, however, researchers still need some knowledge of the sample’s chemical composition before the experiment begins.

α-SAS: Improving measurements of complex molecular structures
α-SAS for Janus particles. Credit: E M Anitas.

Through his study, Anitas overcame this limitation by integrating SAS with machine learning algorithms, creating a technique named α-SAS. This approach estimated the results of small-angle neutron scattering (SANS) by running many random simulations of the suspended sample, and analyzing the distribution of their results.

Anitas demonstrated the capabilities of α-SAS through two different case studies. The first of these investigated “Janus particles”: artificial, self-propelling structures with a well-known contrast variation and neutron scattering intensity. Secondly, he tested the technique on a complex, protein-based molecular system.

In each case, Anitas’ measurements of the molecular structures were far more efficient than they would have been without any integration with machine learning. Based on these promising results, Anitas is now hopeful that, through his approach, SAS could soon become an even more powerful tool for analyzing molecular structures.

See also  Tunable metasurface can control optical light in space and time, offering path to wireless communication channels


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