S. Marchetti results 55
· Newest (Page 1/3, per page 25)
Author: S. Marchetti ×Clear All Filters
Search Results
Genesis of the hot spring mercury deposits of the Mt. Amiata geothermal system (Italy) constrained by Hg and S isotope geochemistryNARA Subscribed
The world-class geothermal system of Mt. Amiata, Italy, comprises a district of 14 hot-spring cinnabar ± stibnite deposits. We determined the Hg isotopic compositions of cinnabar and basement rocks of the geothermal system, coupled with S isotopic compositions of cinnabar, marcasite and stibnite, to constrain the source rocks in this geological environment. Most cinnabar, stibnite, and marcasite samples have δ 34 S between − 0...
Language matters in shaping perceptions and guiding behaviour. The term stakeholder is widely used, yet little attention is paid to the possibility that its use may inadvertently perpetuate colonial narratives and reinforce systemic inequities. In this article, we critically examine the limitations of the stakeholder concept and its ambiguity, normativity, and exclusionary implications. We emphasise the importance of using lan...
Risk assessments are increasingly reliant on information from in vitro assays. The in vitro micronucleus test (MNvit) is a genotoxicity test that detects chromosomal abnormalities, including chromosome breakage (clastogenicity) and/or whole chromosome loss (aneugenicity). In this study, MNvit datasets for 292 chemicals, generated by the US EPA’s ToxCast program, were evaluated using a decision tree-based pipeline for hazard id...
Incidence and risk factors for respiratory tract bacterial colonization and infection in lung transplant recipientsNARA Subscribed
To evaluate incidence of and risk factors for respiratory bacterial colonization and infections within 30 days from lung transplantation (LT). We retrospectively analyzed microbiological and clinical data from 94 patients transplanted for indications other than cystic fibrosis, focusing on the occurrence of bacterial respiratory colonization or infection during 1 month of follow-up after LT. Thirty-three percent of patients de...
The West Antarctic Peninsula (henceforth “Peninsula”) is experiencing rapid warming and melting that is impacting the regional marine food web. The primary phytoplankton groups along the Peninsula are diatoms and cryptophytes. Relative to diatoms, there has been little focus on regional cryptophytes, and thus our understanding of their diversity and ecology is limited, especially at the species level. This gap is important, as...
Efficient zinc/cobalt inter‐replacement in northeast Pacific diatoms and relationship to high surface dissolved Co : Zn ratiosNARA Subscribed
The importance of zinc (Zn) as a nutrient and its ability to be substituted for by cobalt (Co) have been characterized in model marine diatoms. However, the extent to which this substitution capability is distributed among diatom taxa is unknown. Zn/Co metabolic substitution was assayed in four diatom species as measured by the effect of free ion concentrations of Zn 2+ and Co 2+ on specific growth rate. Analysis of growth res...