Sérgio Pinheiro dos Santos

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Coral reefs are increasingly affected by high-temperature stress events and associated bleaching. Monitoring and predicting these events have largely utilized sea surface temperature data, due to the convenience of using large-scale remotely sensed satellite measurements. However, coral bleaching has been observed to vary in severity throughout the water(More)
BACKGROUND Accurate mechanical characterization by the atomic force microscope at the highest spatial resolution requires that topography is deconvoluted from indentation. The measured height of nanoscale features in the atomic force microscope (AFM) is almost always smaller than the true value, which is often explained away as sample deformation, the(More)
During their synthesis, multi-walled carbon nanotubes can be aligned and impregnated in a polymer matrix to form an electrically conductive and flexible nanocomposite with high backing density. The material exhibits the highest reported electrical conductivity of CNT-epoxy composites (350 S/m). Here, we show how conductive atomic force microscopy can be(More)
Cork is a material with a wide array of properties that make it uniquely suitable for many technological applications. All industrial cork comes from a single tree species, the cork-oak (Quercus suber L.), which is limited to the western Mediterranean region. A number of other trees and shrubs with “corky barks” are found in savannah-type ecosystems, namely(More)
DNA topoisomerases control the topology of DNA. Type II topoisomerases exhibit topology simplification, whereby products of their reactions are simplified beyond that expected based on thermodynamic equilibrium. The molecular basis for this process is unknown, although DNA bending has been implicated. To investigate the role of bending in topology(More)
Induction machines (IMs) play a pivotal role in industry and there is a strong demand for their reliable and safe operation. IMs are susceptible to problems such as stator current imbalance and broken bars, usually detected when the equipment is already broken, and sometimes after irreversible damage has occurred. Condition monitoring can significantly(More)
We present the first results from the largest Hα survey of star formation and AGN activity in galaxy clusters. Using 9 different narrow band filters, we select > 3000 Hα emitters within 19 clusters and their larger scale environment over a total volume of 1.3 × 10 5 Mpc 3. The sample includes both relaxed and merging clusters, covering the 0.15 − 0.31(More)
High-resolution microscopy techniques have been extensively used to investigate the structure of soft, biological matter at the nanoscale, from very thin membranes to small objects, like viruses. Electron microscopy techniques allow for obtaining extraordinary resolution by averaging signals from multiple identical structures. In contrast, atomic force(More)