A5041234527- Archaeology and ancient environmental studies
- Geology and Paleoclimatology Research
- Isotope Analysis in Ecology
- Amazonian Archaeology and Ethnohistory
- Nuclear Physics and Applications
- Microplastics and Plastic Pollution
- Landslides and related hazards
- Environmental Sustainability and Education
- Environmental Impact and Sustainability
- Recycling and Waste Management Techniques
- Graphite, nuclear technology, radiation studies
- biodegradable polymer synthesis and properties
- Metallurgy and Cultural Artifacts
- Pleistocene-Era Hominins and Archaeology
- Geological formations and processes
- Soil Carbon and Nitrogen Dynamics
- Effects and risks of endocrine disrupting chemicals
- Astro and Planetary Science
- Pacific and Southeast Asian Studies
- Geological and Geochemical Analysis
Universidade Federal Fluminense
2015-2024
University of Arizona
2017
Institut de l'Information Scientifique et Technique
2017
New York University Press
2017
Weizmann Institute of Science
2017
Abstract Although radiocarbon-accelerator mass spectrometry ( 14 C-AMS) is an important tool for the establishment of soil chronology, its application challenging due to complex nature samples. In present study, chemical extraction methodologies were tested obtain most representative age Amazonian deposition by C-AMS. We performed acid hydrolysis with different numbers extractions, as well treatments combining and bases quartered non-quartered The ages organic matter (SOM) fractions compared...
Abstract Geomorphological, geochronological and paleoenvironmental data were integrated to examine how Holocene environmental changes have influenced geomorphic responses, particularly recurrent landslides colluvial deposition on the steep slopes of Rio de Janeiro mountains. This study focuses a pilot hillslope (32°) with concave‐up topographic hollow associated shallow translational landslides, enhancing our understanding extreme climatic events shaped landscape evolution in region prior...
Abstract The Radiocarbon Laboratory of the Universidade Federal Fluminense, in Brazil, has been successfully applying zinc reduction method for graphitization carbon samples since development its early protocols 2009. Successive methodological research aiming to improve and, ultimately, optimize precision and accuracy our results indicates that temperatures as low 460°C promote erratic 13 C isotopic fractionation, but an approximately constant fractionation about –5‰ is achieved at 520°C. In...
ABSTRACT The Radiocarbon Laboratory of the Fluminense Federal University was installed in 2009, and its NEC Single Stage Accelerator Mass Spectrometry system has been operational since 2012. As first 14 C-AMS facility Latin America, LAC-UFF became a reference center for radiocarbon ( C) dating Brazil. Over years we have implemented pretreatment protocols several kinds materials, such as cellulose, soil, bone, biofuels. In present paper describe our current preparation these types samples....
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A Reserva Extrativista Marinha de Itaipu (RESEX Itaipu) é uma categoria Unidade Conservação Uso Sustentável prevista no Sistema Nacional Unidades Conservação. RESEX localiza-se na região oceânica do município Niterói e visa proteger a pesca artesanal tradicional os recursos naturais que se encontram ameaçados nesta localidade, garantir exploração sustentável dos mesmos. O presente estudo foi realizado extensão da Praia Itaipu, utilizando-se questionário estruturado semiestruturado, além...