From 1.5 million kilometres away from Earth, the Solar and Heliospheric Observatory (SOHO) constantly watches the Sun, returning spectacular pictures and data of the storms that rage across its surface.On this page you can see the latest images from two instruments on board SOHO: the Extreme ultraviolet Imaging Telescope (EIT) and the Large Angle Spectrometric Coronagraph (LASCO). The images are automatically updated throughout the day.

Neurotoxicity is frequently observed in the global aquatic environment, threatening aquatic ecosystems and human health. However, a very limited proportion of neurotoxic effects (∼1%) has been explain...

A method for producing active human aryl sulfatase A by transient transfection of HEK293 cells. Accessory plasmids are included to enhance active site conversion and assist with expression/export.

European Journal of Mass Spectrometry, Ahead of Print. The stability of gas-phase clusters primarily depends on their size, with magic numbers exhibiting exceptional conformal stability due to symmetric or closed-shell configurations. This phase is ideal for analyzing intrinsic properties, that is, as cluster ...

Palmitate, which is the end product of fatty acid synthase, is the key fatty acid for understanding of lipid biosynthetic process in mammalian cells. …

Per- and polyfluoroalkyl substances (PFAS) are widespread environmental contaminants that have been shown to contribute to human exposure, thereby rai…

ABSTRACT Rationale The molecular anion WF5 − constitutes an isobaric interference for the mass spectrometric detection of the HfF5 − anion. The latter is expected to form an extremely sensitive way of detecting the radionuclide 182Hf at natural levels using, for example, accelerator mass spectrometry. Methods Photoinduced detachment of WF5 − molecular anions was studied in the Double ElectroStatic Ion Ring ExpEriment (DESIREE), with the ring cooled to cryogenic temperatures (~13 K). Photon energies from 2.5 to 4.5 eV were applied using an OPO laser system for excitation. This energy range covers the threshold for the removal of an electron from that anion species. Results Photoinduced reactions were observed which indicate the existence of an energy threshold for WF5 − anions above which the neutralization yield increases strongly. In that range, the data of the neutral signal could be fitted by a linear function of photon energy E, yielding a threshold energy E th = 3.13 ± 0.01 eV. This result constitutes a substantial improvement both in the range and the resolution of the photon energy as compared to previous data and provides now a rather precise value for that threshold. Conclusions This knowledge is required for any attempts to suppress WF5 − anions by photodetachment in the ultrasensitive detection of the very rare radioisotope 182Hf using the 182HfF5 − analyte anion; for that, the 182WF5 − anion would be a stable isobaric mass interference for analyses by accelerator mass spectrometry. The radionuclide 182Hf is considered of great interest in various astrophysical environments such as nucleosynthetic processes.