Effect of different cocoon stifling meth

This study explores the impact of various stifling treatments on silk cocoons, which are critical for the production of silk fibroin biomaterials. The objective was to assess how different stifling methods, commonly employed by silk-producing countries, affect the structural and mechanical properties of fibroin films. Through the application of SDS-PAGE, we observed significant protein degradation in fibroin solutions derived from stifled cocoons, alongside alterations in the β-sheet content as determined by infrared spectroscopy. Specifically, higher temperatures during stifling resulted in increased structural stability, although mechanical testing revealed reduced tensile strength and strain at break when dry heat and sun exposure were used. Interestingly, fibroblast proliferation on the treated materials showed improvement compared to controls, with the most pronounced effects seen in fibroin from cocoons treated with dry heat. These findings underscore the need for careful consideration of stifling methods in the development of silk fibroin biomaterials, as they significantly influence both the material properties and biological responses.