3 research outputs found

    Detection of volatile metabolites of moulds isolated from a contaminated library

    Get PDF
    The principal fungal species isolated from a contaminated library environment were tested for their microbial volatile organic compound (MVOC) production ability. Aspergillus creber, A. penicillioides, Cladosporium cladosporioides, Eurotium chevalieri, E. halophilicum, Penicillium brevicompactum and P. chrysogenum were cultivated on suitable culture media inside sample bottles specifically designed and created for direct MVOC injection to a GC-MS instrument. The fungal emissions were monitored over several weeks to detect changes with the aging of the colonies, monitored also by respirometric tests. A total of 55 different MVOCs were detected and isopropyl alcohol, 3-methyl-1-butanol and 2-butanone were the principal compounds in common between the selected fungal species. Moreover, 2,4-dimethylheptane, 1,4-pentadiene, styrene, ethanol, 2-methyl-1-butanol, acetone, furan and 2-methylfuran were the most detected compounds. For the first time, the MVOC production for particular fungal species was detected. The species A. creber, which belongs to the recently revised group Aspergillus section Versicolores, was characterized by the production of ethanol, furan and 1,4-pentadiene. For the xerophilic fungus E. halophilicum, specific production of acetone, 2-butanone and 1,4-pentadiene was detected, supported also by respirometric data. The results demonstrated the potential use of this method for the detection of fungal contamination phenomena inside Cultural Heritage's preservation environments. (C) 2016 Elsevier B.V. All rights reserved

    Variabilit\ue0 della componente carboniosa del particolato atmosferico fine in stazioni di pianura e montane del Veneto

    No full text
    Su 170 campioni di PM2.5 raccolti nel periodo estivo ed in quello invernale del 2019 presso tre stazioni della rete di monitoraggio del Veneto, due di pianura (Venezia citt\ue0 e zona industriale di Marghera) ed una montana (Feltre), \ue8 stata determinata la concentrazione di carbonio organico (OC), carbonio elementare (EC), carbonio idrosolubile e levoglucosano. La componente idrosolubile risulta quella maggiormente presente tra le specie carboniose. Mediante strumenti statistici si \ue8 cercato di individuare le sorgenti del particolato, evidenziando come la componente dovuta alla combustione da biomassa risulta preponderante, soprattutto nel periodo invernale e nella stazione montana. Altre differenze si sono notate tra le stazioni di campionamento, in particolare una marcata influenza del traffico acqueo nella stazione di Venezia. Data l\u2019elevata stabilit\ue0 atmosferica verificatasi nel corso delle campagne di campionamento, si \ue8 inoltre potuto verificare come le sorgenti locali di inquinamento contribuiscano in modo determinante alla componente carboniosa del particolato
    corecore