Abstract Calcite veins are common in organic-rich mudrocks, but their genesis and ability to transmit fluids debated. A combined microstructural isotopic investigation of an array calcite recovered core from the Marcellus Formation reveals that grew via a combination continuous fibrous growth punctuated fracture-opening increments. Continuous opening is result pressure-solution creep involves n...

In the absence of sensory input, neuronal networks are far from being silent. Whether spontaneous changes in ongoing activity reflect previous sensory experience or stochastic fluctuations in brain activity is not well understood. Here we demonstrate reactivation of stimulus-evoked activity that is distributed across large areas in the human brain. We performed simultaneous electrocorticography...

evidence acquisition medline, pubmed, ovid and embase were used to search for clinical studies comparing with or without prophylactic use of lamivudine for hbv reactivation in breast cancer patients receiving chemotherapy. outcomes of interest were the rate of hbv reactivation, incidence of hepatitis and incidence of hepatitis attributable to hbv reactivation, severity of hepatitis and severity...

The rapid growth in natural gas consumption has increased the need for gas storage, in particular in the form of injection into depleted reservoirs. Also, CO2 sequestration into the depleted reservoirs has attracted a large attention recently. However, it is important to ensure that the injection pressure is maintained below a certain limit to avoid unsealing the cap rock or reactivation of any...

Glucose 6-phosphate dehydrogenase (G6PD) from Streptomyces aureofaciens was purified and denatured in 6 M urea. Denaturation led to complete dissociation of the enzyme into its inactive monomers, 98% loss of the enzyme activity, about 30% decrease in the protein fluorescence and a 10 nm red shift in the emission maximum. Dilution of urea-denatured enzyme resulted in regaining of the enzyme acti...

Fault- and fracture-hosted multi-stage mineral assemblages that formed by fracture reactivation fluid migration, constitute archives of the tectonic evolution Precambrian cratons. Complex intergrowth patterns these records often hinder absolute dating mineralization events for geological models. We apply LA-ICP-MS/MS in situ Rb-Sr single crystal growth zones sub-mm-wide vein including illite, K...

Retrieval-mediated learning is a powerful way to make memories last, but its neurocognitive mechanisms remain unclear. We propose that retrieval acts as a rapid consolidation event, supporting the creation of adaptive hippocampal-neocortical representations via the 'online' reactivation of associative information. We describe parallels between online retrieval and offline consolidation and offe...

The extinction of learned associations has traditionally been considered to involve new learning, which competes with the original memory for control over behavior. However, a recent resurgence of interest in reactivation-dependent amnesia has revealed that the retrieval of fear-related memory (with what is essentially a brief extinction session) can result in its destabilization. This review d...