title: Sulphur formation from gypsum by microorganisms.
mesh_terms: D002118:Calcium; D013431:Sulfates / Q000378:metabolism*; D013455:Sulfur / Q000096:biosynthesis*; D013855:Thiobacillus / Q000378:metabolism*
chemical_list: D013431:Sulfates; D013455:Sulfur; D002118:Calcium