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Glass Microbeads in Analog Models of Thrust Wedges Anais da ABC (AABC)
D'ANGELO,TAYNARA; GOMES,CAROLINE J.S..
ABSTRACT Glass microbeads are frequently used in analog physical modeling to simulate weak detachment zones but have been neglected in models of thrust wedges. Microbeads differ from quartz sand in grain shape and in low angle of internal friction. In this study, we compared the structural characteristics of microbeads and sand wedges. To obtain a better picture of their mechanical behavior, we determined the physical and frictional properties of microbeads using polarizing and scanning electron microscopy and ring-shear tests, respectively. We built shortening experiments with different basal frictions and measured the thickness, slope and length of the wedges and also the fault spacings. All the microbeads experiments revealed wedge geometries that were...
Tipo: Info:eu-repo/semantics/article Palavras-chave: Compressional deformation models; Sand; Microbeads; Physical and frictional characterizations..
Ano: 2017 URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0001-37652017000100073
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Microplastics induce dose-specific transcriptomic disruptions in energy metabolism and immunity of the pearl oyster Pinctada margaritifera ArchiMer
Gardon, Tony; Morvan, Lucie; Huvet, Arnaud; Quillien, Virgile; Soyez, Claude; Le Moullac, Gilles; Le Luyer, Jeremy.
A combined approach integrating bioenergetics and major biological activities is essential to properly understand the impact of microplastics (MP) on marine organisms. Following experimental exposure of polystyrene microbeads (micro-PS of 6 and 10 μm) at 0.25, 2.5, and 25 μg L−1, which demonstrated a dose-dependent decrease of energy balance in the pearl oyster Pinctada margaritifera, a transcriptomic study was conducted on mantle tissue. Transcriptomic data helped us to decipher the molecular mechanisms involved in P. margaritifera responses to micro-PS and search more broadly for effects on energetically expensive maintenance functions. Genes related to the detoxification process were impacted by long-term micro-PS exposure through a decrease in...
Tipo: Text Palavras-chave: Microbeads; Marine bivalve; Differentially expressed genes; Stress response; Energy-limited tolerance.
Ano: 2020 URL: https://archimer.ifremer.fr/doc/00640/75213/75351.pdf
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