Results 31 to 40 of about 184,439 (293)
A selecao de adicao mineral pozolânica para compor a matriz de cimento Portland requer determinacao previa de sua reatividade, o que e realizado diretamente, por meio do ensaio Chapelle modificado (NBR 15.895), ou indiretamente, pelo ensaio de ...
J. Filho +4 more
semanticscholar +1 more source
Objetivo: Avaliar o conteúdo de minerais e compostos bioativos presentes em farinha de bagaço de uva das cultivares Bordô e Seibel. Métodos: Foram coletados bagaço das uvas dos tanques de fermentação de vinhos, posteriormente submetidos a secagem em ...
Gabriela Moreira +5 more
semanticscholar +1 more source
As rochas vulcano-sedimentares do orógeno do Rio Alegre ocorrem no SW do Cráton Amazônico e compreendem rochas vulcânicas máficas e ultramáficas, rochas sedimentares químicas, além de rochas intrusivas máficas a félsicas.
João Batista de Matos +4 more
doaj +1 more source
Hydrophysical Database for Brazilian Soils (HYBRAS) and Pedotransfer Functions for Water Retention
Core Ideas We propose a Hydrophysical Database for Brazilian Soils (HYBRAS). Data in HYBRAS comprise 445 soil profiles, with 1075 samples of Brazilian soils. We compared the accuracy of water retention estimates based on climate‐based PTFs. In general, the Brazilian PTFs performed better than the temperate models for HYBRAS.
Marta Vasconcelos Ottoni +4 more
wiley +1 more source
Geochemical characterization of surficial sediments from the southwestern Iberian continental shelf
The impact of trace elements (Ba, Nb, Zr, Y, Sr, Rb, Pb, As, Zn, Cu, Ni, Co, Cr, V, La, Ce, Nd, Sm, Eu, Tb, Yb and Lu) transported by the Guadiana, Tinto-Odiel and Guadalquivir rivers on sediments from the southwestern Iberian continental shelf has been
A Machado +5 more
doaj +1 more source
Jean Sérgio da Silvaa, Lucas da Fonseca Roberti Garciaa,*, Bruno Alexandre Pacheco de Castro Henriquesb,c, Cleonice da Silveira Teixeiraa, Eduardo Antunes Bortoluzzia a Departamento de Odontologia, Área de Endodontia, Centro de Ciências da Saúde ...
J. Silva +4 more
semanticscholar +1 more source
Sialolithiasis is a pathologic condition that affects 60 million people per year, which is caused by the presence of calcified structures, named sialoliths, inside the salivary glands and their salivary ducts. Despite the large incidence of sialolithiasis, its etiology is still unknown.
Ademir Franco +7 more
wiley +1 more source
Estimating recharge rates with baseflow separation in the Ibicuí Watershed (South America)
This study aims to estimate the groundwater recharge rates in the Ibicuí Watershed, in the state of Rio Grande do Sul, using baseflow separation method. The watershed’s main aquifer is the Guarani Aquifer System, in its confined areas (West) and outcrop (
Camila Dalla Porta Mattiuzi +3 more
doaj +1 more source
Molecular Characterization of TP53 Gene in Human Populations Exposed to Low‐Dose Ionizing Radiation
Ionizing radiation, such as that emitted by uranium, may cause mutations and consequently lead to neoplasia in human cells. The TP53 gene acts to maintain genomic integrity and constitutes an important biomarker of susceptibility. The present study investigated the main alterations observed in exons 4, 5, 6, 7, and 8 of the TP53 gene and adjacent ...
Igor Brasil-Costa +9 more
wiley +1 more source
Recursos minerais não-metálicos [PDF]
OS RECURSOS minerais não-metálicos, embora muito importantes para o atendimento das necessidades da população e para o comércio exterior, são pouco contemplados pelas ações governamentais e ignorados pelo público. Geralmente não-incluída no planejamento territorial, a mineração de não-metálicos no Brasil causa extensos impactos ambientais mal ...
openaire +4 more sources

