Paper items from historical archives and libraries are frequently colonized by biodeteriogens, the management of which is a major concern. Essential oil Volatile Organic Compounds (VOCs) of thymol, carvacrol and eugenol, with high levels of antimicrobial and insect repellent activity, were stabilized within crystalline networks of β-cyclodextrins and phenazine-based cocrystals, as a new tool for the control of paper-degrading agents. These formulations were obtained via solvent-free methodologies and resulted as easy handling powders, suitable for the treatment of paper items by indirect contact. Their antimicrobial activity was evaluated on the following species isolated from a book depository at Forte Belvedere (Florence, IT): Alternaria alternata, Aspergillus sp., Cladosporium sp., Trichoderma orientale, Metschnikowia sp., and Bacillus sp. Both formulates displayed a significant antimicrobial activity in vitro, with cocrystals showing higher efficacy than β-cyclodextrins. The formulates were also tested against the pest Lasioderma serricorne, towards which the cocrystals entrapping carvacrol and thymol exhibited repellent activity. Overall, the phenazine-carvacrol cocrystal was the best-performing formulate, also giving favourable outcomes in terms of antifungal activity in an on-paper in vitro experiment designed to reproduce on a small-scale the critical conditions of an infested archive. These promising results pave the way towards further experimentations of VOC-based solid formulates, to shed light on such products applicability for the preservation of paper items.
Effects of trapped-into-solids volatile organic compounds on paper biodeteriogens / Menicucci, F.; Palagano, E.; Michelozzi, M.; Cencetti, G.; Raio, A.; Bacchi, A.; Mazzeo, P. P.; Cuzman, O. A.; Sidoti, A.; Guarino, S.; Basile, S.; Riccobono, O.; Peri, E.; Vizza, F.; Ienco, A.. - In: INTERNATIONAL BIODETERIORATION & BIODEGRADATION. - ISSN 0964-8305. - 174:(2022), p. 105469. [10.1016/j.ibiod.2022.105469]
Effects of trapped-into-solids volatile organic compounds on paper biodeteriogens
Bacchi A.;Mazzeo P. P.;
2022-01-01
Abstract
Paper items from historical archives and libraries are frequently colonized by biodeteriogens, the management of which is a major concern. Essential oil Volatile Organic Compounds (VOCs) of thymol, carvacrol and eugenol, with high levels of antimicrobial and insect repellent activity, were stabilized within crystalline networks of β-cyclodextrins and phenazine-based cocrystals, as a new tool for the control of paper-degrading agents. These formulations were obtained via solvent-free methodologies and resulted as easy handling powders, suitable for the treatment of paper items by indirect contact. Their antimicrobial activity was evaluated on the following species isolated from a book depository at Forte Belvedere (Florence, IT): Alternaria alternata, Aspergillus sp., Cladosporium sp., Trichoderma orientale, Metschnikowia sp., and Bacillus sp. Both formulates displayed a significant antimicrobial activity in vitro, with cocrystals showing higher efficacy than β-cyclodextrins. The formulates were also tested against the pest Lasioderma serricorne, towards which the cocrystals entrapping carvacrol and thymol exhibited repellent activity. Overall, the phenazine-carvacrol cocrystal was the best-performing formulate, also giving favourable outcomes in terms of antifungal activity in an on-paper in vitro experiment designed to reproduce on a small-scale the critical conditions of an infested archive. These promising results pave the way towards further experimentations of VOC-based solid formulates, to shed light on such products applicability for the preservation of paper items.I documenti in IRIS sono protetti da copyright e tutti i diritti sono riservati, salvo diversa indicazione.
