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• W3205113883 endingPage "104873" @default.
• W3205113883 startingPage "104873" @default.
• W3205113883 abstract "Spider major ampullate (MA) silk is characterized by high strength and toughness and is adaptable across environments. Experiments depriving spiders of protein have enabled researchers to examine nutritionally induced changes in gene expression, protein structures, and bulk properties of MA silk. However, it has not been elucidated if it varies in a similar way at a nanoscale. Here we used Atomic Force Microscopy (AFM) to simultaneously examine the topographic, structural, and mechanical properties of silks spun by two species of spider, Argiope keyserlingi and Latrodectus hasselti, at a nanoscale when protein fed or deprived. We found height, a measure of localized width, to substantially vary across species and treatments. We also found that Young's modulus, which may be used as an estimate of localized stiffness, decreased with protein deprivation in both species' silk. Our results suggest that nanoscale skin-core structures of A. keyserlingi's MA silk varied significantly across treatments, whereas only slight structural and functional variability was found for L. hasselti's silk. These results largely agreed with examinations of the bulk properties of each species' silk. However, we could not directly attribute the decoupling between protein structures and bulk mechanics in L. hasselti's silk to nanoscale features. Our results advance the understanding of processes inducing skin and core structural variations in spider silks at a nanoscale, which serves to enhance the prospect of developing biomimetic engineering programs." @default.
• W3205113883 created "2021-10-25" @default.
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• W3205113883 date "2022-01-01" @default.
• W3205113883 modified "2023-10-12" @default.
• W3205113883 title "Nutritionally induced nanoscale variations in spider silk structural and mechanical properties" @default.
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• W3205113883 doi "https://doi.org/10.1016/j.jmbbm.2021.104873" @default.
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• W3205113883 hasPublicationYear "2022" @default.
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