Gypsum is the dihydrate form of calcium sulfate. The word "gypsum," however, is used to describe different phases of the same material, including anhydrite (calcium sulfate, with no water of crystallization), selenite, calcined gypsum, and plaster of Paris. It forms as evaporites from marine waters and is usually found collectively with other mineral deposits such as quartz, sulfur, and clays. ...

Traffic is a major source of anthropogenic aerosol in urban atmosphere. In this study, particles were measured with TEM-EDX system at the roadside main road northwestern part Beijing, China, under clear and hazy conditions. Soot, organic, sulfur-rich (S-rich), mineral, metal particles, as well mixtures, frequently encountered aerosols. Under conditions, S-rich coated organic matter (S-OM partic...

Sulfur deficiency in plants has severe impacts on both growth and nutrient composition. Fumigation with sub-lethal concentrations of H2S facilitates the supply of reduced sulfur via the leaves while sulfate is depleted from the roots. This restores growth while sulfate levels in the plant tissue remain low. In the present study this system was used to reveal interactions of sulfur with other nu...

[1] Atmospheric sulfate aerosols have a cooling effect on the Earth’s surface and can change cloud microphysics and precipitation. China has heavy loading of sulfate, but their sources and formation processes remain uncertain. In this study we characterize possible sources and formation processes of atmospheric sulfate by analyzing sulfur isotope abundances (S, S, 34S, and S) and by detailed X‐...

Roasting is often required to convert sulfidic minerals into their sulfate and/or oxide forms with the aim increase extractability of targeted metals. In this study, tailings Neves Corvo Cu-Zn-Pb-mine (Portugal) underwent conventional roasting (CR) and microwave-assisted (MR) compare effect both heating technologies on behavior. Upon in air, transformations mineral phases were studied by differ...

Abstract Subglacial Lake Whillans lies below around 800 m of Antarctic ice and is isolated from fresh sources photosynthetic organic matter to sustain life. The diverse microbial ecosystems within the lake underlying sediments are therefore dependent on a combination relict, overridden, marine-derived mineral-derived energy. Here, we conduct experiments replicate subglacial erosion involving bo...

The goal of primary tooth pulp therapy is the preservation of the primary teeth until their normal time of exfoliation. Teeth with carious involvement approaching the pulp can be treated with a variety of approaches, including three pulpotomy techniques--diluted formocresol, ferric sulfate, and mineral trioxide aggregate--and an indirect pulp therapy technique. Accurate diagnosis of the vitalit...

Ce(2)(SO(4))(3)(H(2)O)(4) was obtained hydro-thermally from an aqueous solution of cerium(III) oxide, trimethyl-amine and sulfuric acid. The precision of the structure determination has been significantly improved compared with the previous result [Dereigne (1972 ▶). Bull. Soc. Fr. Mineral. Cristallogr.95, 269-280]. The coordination about the two Ce atoms is achieved by seven and six bridging O...