Selective death of CA1 pyramidal neurons after transient forebrain ischemia has attracted interest for its possible relation to the pathogenesis of memory deficits and dementia. Using whole cell patch-clamp recording from CA1 pyramidal neurons in hippocampal slices of gerbils after ischemia we studied the intracellular signaling mechanisms related to the… (More)
The removal of molecular hydrogen (H 2) from the atmosphere is dominated by the uptake in soils. Notwithstanding , estimates of the magnitude of this important process on a global scale are highly uncertain. The CARIBIC aircraft observations of the seasonal variations of H 2 and its D/H isotopic ratio in the Northern Hemisphere allow an independent , better… (More)
We report measurements of the deuterium content of molecular hydrogen (H 2) obtained from a suite of air samples that were collected during a stratospheric balloon flight between 12 and 33 km at 40 • N in October 2002. Strong deuterium enrichments of up to 400‰ versus Vienna Standard Mean Ocean Water (VSMOW) are observed, while the H 2 mixing ratio remains… (More)
An intensive measurement campaign was performed in June 2000 at the Mt. Cimone station (44 • 11 N – 10 • 42 E, 2165 m asl, the highest mountain in the northern Italian Apennines) to study photochemical ozone production in the lower free troposphere. In general, average mixing ratios of important trace gases were not very high (121 ± 20 5 ppbv CO, 0.284 ±… (More)
The removal of molecular hydrogen (H 2) from the atmosphere is dominated by the uptake in soils. Notwithstanding, estimates of the magnitude of this important process on a global scale are highly uncertain. The CARIBIC aircraft observations of the seasonal variations of H 2 and its D/H isotopic ratio in the northern hemisphere allow an inde-5 pendent,… (More)
Hydrogen isotope fractionation in the photolysis of formaldehyde T. S. Rhee et al.
To better estimate annual primary production in the Amundsen Sea, which is one of the highest productivity regions in the Southern Ocean, the seasonal variations in carbon and nitrogen uptake rates of phytoplankton were investigated in this study. Based on 13C–15N dual isotope tracer techniques, the average daily productivities for the Amundsen polynya… (More)