Publications by authors named "S Ridolfo"
The rapid expansion of the aviation sector raises concerns about air quality impacts within and around airports. Ultrafine particles (UFP, diameter < 100 nm) are of particular concern due to their potential adverse health effects. In this study, particle number concentrations (PNC), particle number size distribution (PNSD), and other ancillary pollutants such as particulate matter (PM), nitrogen oxides (NO), black carbon (BC), sulfur dioxide (SO), ozone (O), carbon monoxide (CO) and benzene, as well as organic markers and trace elements (in quasi-UFP) were measured at Barcelona-El Prat Airport (80 m and 250 m from the main taxiway and runway).
View Article and Find Full Text PDFAmbient air ultrafine particles (UFP, particles with a diameter <100 nm) have gained significant attention in World Health Organization (WHO) air quality guidelines and European legislation. This review explores UFP concentrations and particle number size distributions (PNC-PNSD) in various transportation hotspots, including road traffic, airports, harbors, trains, and urban commuting modes (walking, cycling, bus, tram, and subway). The results highlight the lack of information on personal exposure at harbors and railway stations, inside airplanes and trains, and during various other commuting modes.
View Article and Find Full Text PDFArticle Synopsis
- The study discusses the challenges of selecting appropriate chemical components for Positive Matrix Factorization (PMF) in aerosol source apportionment, highlighting that this choice greatly affects the identified sources and contribution estimates.
- It emphasizes that the absence of specific source tracers, like levoglucosan, can skew results and lead to uncertainties in identifying and quantifying sources of particulate matter (PM).
- The research includes sensitivity analyses across different urban conditions in Europe, revealing that while vehicle exhaust analysis may be less sensitive to component choices, neglecting certain inorganic elements can hinder the identification of non-exhaust sources.
Background: Histologically assessed liver fibrosis stage has prognostic significance in patients with non-alcoholic fatty liver disease (NAFLD) and is accepted as a surrogate endpoint in clinical trials for non-cirrhotic NAFLD. Our aim was to compare the prognostic performance of non-invasive tests with liver histology in patients with NAFLD.
Methods: This was an individual participant data meta-analysis of the prognostic performance of histologically assessed fibrosis stage (F0-4), liver stiffness measured by vibration-controlled transient elastography (LSM-VCTE), fibrosis-4 index (FIB-4), and NAFLD fibrosis score (NFS) in patients with NAFLD.