Nannofossil biostratigraphy, strontium and carbon isotope stratigraphy, cyclostratigraphy and an astronomically calibrated duration of the Late Campanian Radotruncana calcarata Zone

AbstractA section from the southern (Austro-Alpine Northern Calcareous Alps) margin of the Penninic Ocean in the NW Tethys realm of Late Campanian age is investigated stratigraphically. Plankton foraminifer and nannofossil biostratigraphy designate the presence of the Globotruncana ventricosa Zone and the Radotruncana (Globotruncanita) calcarata Zone, and standard nannofossil zones CC21–UC15cTP and CC22ab–UC15deTP. The combination of carbon isotope stratigraphy, strontium isotopes, and cyclostratigraphy allows a detailed chronostratigraphic correlation. Periodicity was obtained by power spectral analysis, sinusoidal regression, and Morlet wavelets. The duration of the calcarata Total Range Zone is calculated by orbital cyclicity expressed in thickness data of limestone–marl rhythmites and stable carbon isotope data. Precessional, obliquity, and short and long eccentricity cycles are identified and give an extent of c. 806kyr for the zone. Mean sediment accumulation rates are as low as 1.99cm/kyr and correspond well to sediment accumulation rates in similar settings. We further discuss chronostratigraphic implications of our data

Molecular Characterization of a Novel Intracellular ADP-Ribosyl Cyclase

Background. ADP-ribosyl cyclases are remarkable enzymes capable of catalyzing multiple reactions including the synthesis of the novel and potent intracellular calcium mobilizing messengers, cyclic ADP-ribose and NAADP. Not all ADP-ribosyl cyclases however have been characterized at the molecular level. Moreover, those that have are located predominately at the outer cell surface and thus away from their cytosolic substrates. Methodology/Principal Findings. Here we report the molecular cloning of a novel expanded family of ADP-ribosyl cyclases from the sea urchin, an extensively used model organism for the study of inositol trisphosphate-independent calcium mobilization. We provide evidence that one of the isoforms (SpARC1) is a soluble protein that is targeted exclusively to the endoplasmic reticulum lumen when heterologously expressed. Catalytic activity of the recombinant protein was readily demonstrable in crude cell homogenates, even under conditions where luminal continuity was maintained. Conclusions/Significance. Our data reveal a new intracellular location for ADP-ribosyl cyclases and suggest that production of calcium mobilizing messengers may be compartmentalized

Field Theory with Coordinate Dependent Noncommutativity

International audienceWe discuss the formulation of classical field theoretical models on $n$-dimensional noncommutative space-time defined by a generic associative star product. A simple procedure for deriving conservation laws is presented and applied to field theories in noncommutative space-time to obtain local conservation laws (for the electric charge and for the energy-momentum tensor of free fields) and more generally an energy-momentum balance equation for interacting fields. For free field models an analogy with the damped harmonic oscillator in classical mechanics is pointed out, which allows us to get a physical understanding for the obtained conservation laws. To conclude, the formulation of field theories on curved noncommutative space is addressed

FESST@HH meteorological network measurements

This data set contains meteorological measurement data collected during the Field Experiment on Sub-mesoscale Spatio-Temporal variability at Hamburg (FESST@HH) between June and August 2020. The observational set up of FESST@HH consisted of a ground-based network of 103 autonomous measurement stations (see photos), that covered the greater area (50 km x 35 km) of Hamburg (Germany; 53.5 °N 10.0 °E) with the primary goal to observe the spatial dimension of convective cold pools. During the experiment 82 low-cost and self-designed APOLLO (Autonomous cold POoL LOgger) stations sampled air temperature and pressure at 1-s resolution, while 21 WXT weather stations with commercial sensors provided additional information on relative humidity, wind speed and precipitation at 10-s resolution. All variables are sampled at a height of 3 m above ground, if not indicated otherwise

FESST@HH meteorological network measurements

This data set contains meteorological measurement data collected during the Field Experiment on Sub-mesoscale Spatio-Temporal variability at Hamburg (FESST@HH) between June and August 2020. The observational set up of FESST@HH consisted of a ground-based network of 103 autonomous measurement stations, that covered the greater area (50 km x 35 km) of Hamburg (Germany; 53.5 °N 10.0 °E) with the primary goal to observe the spatial dimension of convective cold pools. During the experiment 82 low-cost and self-designed APOLLO (Autonomous cold POoL LOgger) stations sampled air temperature and pressure at 1-s resolution, while 21 WXT weather stations with commercial sensors provided additional information on relative humidity, wind speed and precipitation at 10-s resolution. All variables are sampled at a height of 3 m above ground, if not indicated otherwise