We review the principal aspects of EEG and SEP to detect and prevent cerebral ischaemia
in the operating room during interventions at risk. EEG and SEP are variables that indirectly …

The emergence and expansion of animal life on Earth represents a dramatic shift in the
structure and complexity of the biosphere. A lack of firm constraints on surface oxygen levels …

We studied eleven patients with intrathecal extramedullary arteriovenous fistulas identified
by selective angiography and myelography. The fistulas were located on the surface of the …

The formation of a primordial crust is a critical step in the evolution of terrestrial planets but
the timing of this process is poorly understood. The mineral zircon is a powerful tool for …

… N i isotope determination, (b) to determine the N i isotope composition of various geological
reference materials, (c) to assess the isotope composition of the B ulk S ilicate E arth relative …

Aims. – Motor threshold (MT) is an important parameter for the practice of transcranial magnetic
stimulation. Our goal was to compare three methods to estimate MT in a clinical setting. …

The biogeochemical cycling of zinc (Zn) is intimately coupled with organic carbon in the
ocean. Based on an extensive new sedimentary Zn isotope record across Earth's history, we …

The chromium (Cr) isotope composition of marine sediments has the potential to provide
new insights into the evolution of Earth-surface redox conditions. There are significant but …

Nickel (Ni) isotopes have recently emerged as a new biogeochemical tracer in marine
environments, but our understanding of the mechanisms of Ni isotope fractionation in natural …

Emerging geochemical proxies have improved our understanding of the broad-scale history
of Earth’s oxygenation. However, paleoredox work does not always include extensive …