The marine cyclopoid Oithona similis sensu lato Claus, 1866, is considered to be one of the most abundant and ubiquitous copepods in the world. However, its minimal original diagnosis and the unclear connection with its (subjective) senior synonym Oithona helgolandica Claus, 1863, may have caused frequent misidentification of the species. Consequently, it seems possible that several closely rel...

The β-barrel assembly machine (BAM) is essential for folding outer membrane proteins (OMPs) into the (OM) of Gram-negative bacteria. Structures BAM have been solved using X-ray crystallography and cryoEM, but conformation in highly crowded native OM remained unsolved. Using EPR spectroscopy intact E. coli cells, structure situ has now revealed Research Article (e202218783) by Sheena Radford, Ch...

The production of elemental sulphur and calcium carbonate (CaCO3) from gypsum waste can be achieved by thermally reducing the waste into calcium sulphide (CaS), which is then subjected to a direct aqueous carbonation step for the generation of hydrogen sulphide (H2S) and CaCO3. H2S can subsequently be converted to elemental sulphur via the commercially available chemical catalytic Claus process...

A mathematical model, based on the dusty-gas model extended with surface diffusion, is presented that describes mass transport owing to molecular diffusion and viscous flow, as well as an instantaneous reversible reaction inside a membrane reactor. The reactants are fed to opposite sides of the membrane, considering masstransfer resistances in the gas phase outside the membrane. The Claus react...

Claus process is a widely adopted to reduce emissions from refineries by converting H2S into elemental sulfur. On the other hand, Haldor Topsoe’s Wet Gas Sulfuric Acid (WSA) an alternative convert directly sulfuric acid. The purpose of this project was simulate both these state-of-the-art technologies and evaluate their suitability for various acid gas capacity concentrations. Three sustainabil...

Along with oil and gas operations, huge amounts of sulfur byproducts are produced. For example, in the State Qatar which has third largest proven reserves natural gas, an incredible amount is produced as byproduct from its processing facilities. The surpasses by far that can be utilized currently country. Hydrogen sulfide (H2S) existing extracted Qatar’s North Field converted to elemental using...