RESUMO
Inspired by the natural antimicrobial effect of the topographical features of insect wings, this study prepared urchin-like gold nanoparticles (UGNPs) and deposited them on poly(ε-caprolactone) (PCL)/chitosan (P/C) electrospun nanofiber film to strengthen antibacterial activities of this active packaging. Results showed that L-Dopa was a suitable reducing agent to prepare UGNPs, and the spine length of UGNPs increased from 21.23 to 35.83 nm as the molar ratio of L-Dopa:HAuCl4 increased from 1 to 3. As the nanofiber film was immersed in the nanoparticle solution for a longer time, the UGNP content in P/C nanofibers increased. As the spine length of UGNPs and depositing UGNP content increased, the inhibition rate against S. aureus and E. coli. of P/C nanofiber film increased. In addition, P/C nanofiber film deposited with UGNPs also exhibited good thermal stability, hydrophilicity, mechanical strength, and water vapor permeability, exhibiting its potential as an antibacterial active packaging.
RESUMO
In China, three Rosaceae fruits with distinctive flavours and functions have recently been transformed from edible plants into standardised juice or beverage products. To enhance the development of these fruit products, the results and conclusions from various investigations of the chemical and biological properties of fruits should be summarised. Based on industrial advances, there are still some limitation in the research and development of these fruit products that need to be addressed. Therefore, in this report, we provided a comprehensive and rigorous review to summarise critical data from phytochemical and biological investigations and from flavour profiles and industrial development of these fruit products. Our goal is to provide insights into recent research findings in order to advance studies and developments of products of these flavourful fruits from a reasonable perspective.
