Results 261 to 270 of about 460,152 (328)

Dynamic risk stratification using Markov chain modelling in patients with chronic heart failure. [PDF]

open access: yesESC Heart Fail, 2022
Kazmi S   +7 more
europepmc   +1 more source

Pre‐aged organic matter dominates organic carbon burial in a major perialpine lake system

open access: yesLimnology and Oceanography, EarlyView.
Abstract Organic carbon (OC) burial in lake sediments is comparable to that in marine sediments globally. However, climatic and carbon cycle implications depend on the origin of buried OC. This study utilizes high‐resolution radiocarbon (14C) measurements in combination with stable carbon isotopes (13C) and total organic carbon/total nitrogen ratios to
Benedict V. A. Mittelbach   +8 more
wiley   +1 more source

Gas transfer velocity (k600$$ {k}_{600} $$) increases with discharge in steep streams but not in low‐slope streams

open access: yesLimnology and Oceanography Letters, EarlyView.
Abstract Gas transfer velocity (k600$$ {\mathrm{k}}_{600} $$) controls gas fluxes between aquatic ecosystems and the atmosphere. In streams, k600$$ {\mathrm{k}}_{600} $$ is controlled by turbulence and, thus, local hydrology and geomorphology. Resultantly, variability in k600$$ {\mathrm{k}}_{600} $$ can be large and modeling k600$$ {\mathrm{k}}_{600} $$
Kelly S. Aho   +6 more
wiley   +1 more source

Selective Effects of Substantia Nigra and Locus Coeruleus Degeneration on Cognition in Parkinson's Disease

open access: yesMovement Disorders, EarlyView.
Abstract Background The substantia nigra (SN) and locus coeruleus (LC) are among the first brain regions to degenerate in Parkinson's disease (PD). This has important implications for early cognitive deficits because these nuclei are sources of ascending neuromodulators (i.e., dopamine and noradrenaline) that support various cognitive functions such as
Sophie Sun   +6 more
wiley   +1 more source

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