Assessment of particulate matter genotoxicity at Limeira city (SP) using the micronucleus assay in Tradescantia pallida (TRAD-MCN)

The use of plants for air contamination biomonitoring has been increased due to the low costs and the easy application and handling. Thus, this study aimed to evaluate the genotoxic potential of inhalable particulate matter in the atmosphere of Limeira city (SP, Brazil) by assessing micronucleus (Trad-MCN) in Tradescantia pallida. Samples were collected from august 30th to October 8th, 2007 using large volume samplers (HI-VOL-PM10). The results indicated that particulate matter levels are within the tolerable limits defined by the legislation. However, they were higher than the annual average values. A genotoxic potential of the particulate matter was seen in some cases where micronucleus frequency more than double in relation to the control. As conclusion, Limeira air contaminants are potentially genotoxic, and the combination of micronucleuos assay and T. pallida showed a good sensibility, and can be used in further studies as a tool of air quality monitoring. Keywords: genotoxicity, Tradescantia pallida, particulate matter (PM10), atmosphere pollution

Terrestrial impact structures as geoheritage: an assessment method of their scientific value and its application to Brazil

Terrestrial impact structures are geological and geomorphological features with particular importance to understand the history and evolution of the planet. Impact structures are scattered around the world but in many countries these features are under threat, essentially due to anthropic factors. Impact structures with higher scienti c value should be considered as geological heritage and, consequently, be subjected to geoconservation strategies. In order to select the most important impact structures to be properly conserved and managed, this paper proposes a quantitative assessment method of the scienti c value of these structures. The eight Brazilian impact structures were used to test this method that has the potential to be applied to any geological context in any country. The structures known as Araguainha Dome-MT and Serra da Cangalha-TO reached a higher scienti c value, which justi es the need to develop geoconservation strategies and a proper management.The Conselho Nacional de Pesquisa e Desenvolvimento (CNPq / National Council for Research and Development) and the Programa Ciências sem Fronteiras / Science Without Borders Programme are acknowledged for the support of the postdoctoral grant No 233209/2013-1 of the 1st author. The work was co-funded by the European Union through the European Regional Development Fund, based on COMPETE 2020 (Programa Operacional da Competitividade e Internacionalização), project ICT (UID/ GEO/04683/2013) with reference POCI-01-0145- FEDER-007690 and Portuguese funds provided by Fundação para a Ciência e Tecnologia.info:eu-repo/semantics/publishedVersio

Dating The Araguainha Impact Structure With Thermochronologic Methods

511A449A44979th Annual Meeting of the Meteoritical-SocietyAUG 07-12, 2016Berlin, GERMAN