Publicações - ciências exatas e da terra
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BARBOSA, GUILHERME A.;
PIOVAN, LEANDRO;
HUGHES, DAVID L.;
BRIGANTI, MATTEO;
Poneti, Giordano;
NUNES, GIOVANA G.;
SANTANA, FRANCIELLI S.;
Jaisa Fernandes Soares;
CARNEIRO NETO, JOSÉ SEVERIANO;
STOEBERL, BRUNO J.;
WISBECK, SARITA;
GIESE, SIDDHARTHA O. K.;
YOKAICHIYA, FABIANO;
COSTA, DANIEL DA S.;
Barison, Andersson;
RIBEIRO, RONNY R.
Palavra-chave:
RMN
Áreas do conhecimento:
Ciências Exatas e da Terra; Química; Química Orgânica; Estrutura, Conformação e Estereoquímica
resumo ...
Ten anhydrous rare-earth (RE) chloride solvates were prepared by dehydration of RECl3·6H2O with triethylorthoformate (teof) in O-donor solvents as an accessible and general synthetic route. Reactions are quick, safe, mild, easily reproducible, and cost-effective. They run at room temperature or under reflux
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AUGUSTO BARBOSA, GUILHERME AUGUSTO;
Leandro Piovan;
D. L. Hughes;
BRIGANTI, MATTEO;
Giordano Poneti;
GIOPPO NUNES, GIOVANA;
SANTANA, FRANCIELLI;
Jaisa Fernandes Soares;
José Severiano Carneiro Neto;
STOEBERL, BRUNO JOSÉ;
Sarita Wisbeck;
GIESE, SIDDHARTHA OM KUMAR;
YOKAICHIYA, FABIANO;
DA SILVA COSTA, DANIEL;
Barison, Andersson;
RIBEIRO, RONNY R
Palavra-chave:
rare earths;
synthetic methods;
alkyl orthoformates;
structure elucidation;
Magnetic properties
Áreas do conhecimento:
Ciências Exatas e da Terra; Química; Química Inorgânica; Química de Coordenação;
Ciências Exatas e da Terra; Química; Síntese Inorgânica;
Ciências Exatas e da Terra; Química; Magnetismo Molecular
resumo ...
Ten anhydrous rare-earth (RE) chloride solvates were prepared by dehydration of RECl3·6H2O with triethylorthoformate (teof) in O-donor solvents as an accessible and general synthetic route. Reactions are quick, safe, mild, easily reproducible, and cost-effective. They run at room temperature or under reflux
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Albert Martin;
Eduardo Cunha de Almeida;
Oscar Romero;
Anna Queralt
Palavra-chave:
Data Profiling;
Denial Constraints
Áreas do conhecimento:
Ciências Exatas e da Terra; Ciência da Computação; Metodologia e Técnicas da Computação; Banco de Dados
resumo ...
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MARGARIDA, BRUNA RICETTI;
AMBROSIO, ISADORA ZANGARI;
KANDA, LUIS RICARDO SHIGUEYUKI;
DA CRUZ LIMA, ALINE ANDREZA;
NEPEL, ANGELITA;
Barison, Andersson;
CORAZZA, MARCOS L.;
DE LIMA LUZ JUNIOR, LUIZ FERNANDO
Palavra-chave:
RMN
Áreas do conhecimento:
Ciências Exatas e da Terra; Química; Química Orgânica; Estrutura, Conformação e Estereoquímica
resumo ...
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ARAÚJO, ISAAC MOURA;
REBELO, RICARDO ANDRADE;
Luiz Everson da Silva;
DOMICIANO, CAROLINA BANDEIRA;
COUTINHO, HENRIQUE DOUGLAS MELO;
PEREIRA, RAIMUNDO LUIZ SILVA;
DE ARAÚJO, ANA CAROLINA JUSTINO;
GONÇALVES, SHEILA ALVES;
TINTINO, SAULO RELISON;
DE MORAIS OLIVEIRA-TINTINO, CÍCERA DATIANE;
DE MENEZES, IRWIN ROSE ALENCAR;
SALAMONI, RENATA;
BEGNINI, IEDA MARIA
Áreas do conhecimento:
Ciências Exatas e da Terra; Química; Química Orgânica; Síntese Orgânica
resumo ...
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ANTONELLI, FRANCESCO;
STEVANATO, RODOILTON;
RODIZES, ANGELA;
SERRANO, VINICIUS DIAS;
YAMAMOTO, JORGE KAZUO;
ABREU, GUSTAVO;
Francisco José Fonseca Ferreira;
FRIES, MAXIMILIAN
Palavra-chave:
Advancing gold exploration;
Magnetic and radiometric data integration;
Airborne and ground geophysics;
Geoeletrical merhods (resistivity and IP);
Castro Basin, PR
Áreas do conhecimento:
Ciências Exatas e da Terra; Geociências; Mineral Exploration;
Ciências Exatas e da Terra; Geociências; Geofísica; Applied geophysics;
Ciências Exatas e da Terra; Geociências; Airborne and ground geophysics
resumo ...
(en)
The gold exploration in the Castro Basin, Brazil, has been hampered by complex geology, disseminated low-grade ore, and the subsurface nature of quartz-adularia veins. To address these challenges, this study applied airborne geophysical techniques (gamma-ray spectrometry and magnetometry) to identify hydrothermal alteration zones and related structures. Radiometric parameters and magnetic gradient variations were analyzed to correlate with gold occurrences. Results indicated a strong association between potassium enrichment and magnetic lineaments, which was confirmed by geochemical samples. Based on these results, the Torre Target was selected for ground geophysical surveys. Electrical resistivity, induced polarization and magnetometry data were collected and integrated with digital elevation models. Geoelectrical sections and maps delineated the main ore body characterized by high chargeability anomalies associated with argillic alteration and disseminated sulfides. Resistivity data highlighted potential vertical contacts and fault structures indicative of an epithermal system. Magnetic techniques identified areas of magnetite concentrations within breccias and rhyolite, suggesting a connection to the mineralization events. In addition, magnetic data helped differentiate chargeability anomalies associated with the ore body from those associated with residual soil from diabase dikes. Results were validated by drilling, confirming the accuracy of the targets identified. This study demonstrates the effectiveness of geophysical techniques for the exploration of challenging gold deposits in the Castro Basin.
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Kelvin Willian de Souza Siqueira;
Cláudia Pereira Krueger;
Luiz Fernando Sapucci;
AMAGUA, CHRISTIAN GONZALO PILAPANTA
Áreas do conhecimento:
Ciências Exatas e da Terra; Geociências; Geodésia; Sensoriamento Remoto
resumo ...
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SCHAFFKA, VINICIUS MONTEIRO;
GUARINGUE, RAPHAELA PEREIRA;
KOZAN, LARISSA;
KEREK, ANDRÉ LUIS;
MAGALHÃES, CÁSSIA GONÇALVES;
Barison, Andersson;
FIORIN, BARBARA CELÂNIA
Palavra-chave:
RMN
Áreas do conhecimento:
Ciências Exatas e da Terra; Química; Química Orgânica; Estrutura, Conformação e Estereoquímica
resumo ...
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SGARLATE, BRUNA;
KANAAN, AKEL FERREIRA;
CORAZZA, MARCOS LÚCIO;
Luiz Pereira Ramos
Palavra-chave:
biocarvão;
Biochar;
Pirólise lenta;
adsorção;
Tratamento de Efluentes;
cinética
Áreas do conhecimento:
Ciências Exatas e da Terra; Química; Biocombustíveis e Bioenergia;
Engenharias; Engenharia Química; Tecnologia Química; Petróleo e Petroquímica;
Ciências Exatas e da Terra; Química; Química Orgânica; Síntese Orgânica
resumo ...
(en)
This study investigates the synthesis and characterization of biochar derived from the slow pyrolysis of industrial digestate (IDT), a byproduct of anaerobic digestion. The biochars were characterized by their water uptake capacity, surface characteristics (BET), and its sorption capacity against model molecules (e.g. methyl violet (MV) and potassium dichromate (K2Cr2O7) in aqueous solutions. The results showed that the water uptake capacity was ~38.3% for all tested biochars independent of pyrolysis processing procedure. However, a linear relationship between biochar surface area and pyrolysis temperature was attained where greater surface area was observed for higher pyrolysis temperature. Biochars presented mesoporous structure independent of pyrolysis temperature. The MV removal efficiency reached 63.9% for C350-22.5 and 74.6% for C550-22.5 at 25 °C. The kinetic data was best described by the Pseudo-second order (PSO) model. Nevertheless, the study found that the biochars had no significant adsorption capacity for K2Cr2O7, indicating specificity in their adsorption capabilities. Biochars obtained from pyrolyzed IDT represents a sustainable alternative to the design of sorbent platforms, contributing to improved water quality and resource recovery.
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BERGUE, CRISTIANINI TRESCASTRO;
NAUMCHEVA, MARIA;
Da Silva, Rafael Costa;
FOREL, MARIE-BÉATRICE;
Fernando Antonio Sedor
Palavra-chave:
Paleolimnology;
Taxonomy;
Permian;
Paraná Basin;
Micropaleontology
Áreas do conhecimento:
Ciências Exatas e da Terra; Geociências; Paleontologia; Paleontologia de Vertebrados;
Ciências Exatas e da Terra; Geociências; Geologia; Paleontologia Estratigráfica;
Ciências Exatas e da Terra; Oceanografia; Zoologia
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