The impact of HSM and HPH pre-treatments on the morphological characteristics of tomato peels and cutin extracts was assessed through scanning electron microscopy (SEM), as described by Pirozzi et al. [16 (link)]. Briefly, the samples were mounted to an aluminum stub and coated with a 10 nm thick layer of gold–palladium alloy via sputter coating before examination under a high-resolution ZEISS HD15 Scanning Electron Microscope (Zeiss, Oberkochen, Germany) at 1000× magnification.
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