Silicosis is a fibronodular lung disease caused by inhalation of dust containing crystalline silica (alpha-quartz or silicon dioxide), which is distributed widely, or its polymorphs (tridymite or cristobalite), which are distributed less widely.ilicosis is a fibronodular lung disease caused by inhalation of dust containing crystalline silica (alpha-quartz or silicon dioxide), which is distributed widely, or its polymorphs (tridymite or cristobalite), which are distributed less widely.
A phosphodiester bond occurs when exactly two of the hydroxyl groups in phosphoric acid react with hydroxyl groups on other molecules to form two ester bonds.Phosphodiester bonds are central to all life on Earth, as they make up the backbone of the strands of nucleic acid. phosphodiester bond occurs when exactly two of the hydroxyl groups in phosphoric acid react with hydroxyl groups on other molecules to form two ester bonds. Phosphodiester bonds are central to all life on Earth, as they make up the backbone of the strands of nucleic acid.
These 10 animal facts will amaze you. In biochemistry, the term pyrophosphate (PPi) is used to refer to chemical compounds that encompass the esters, salts, and anion of pyrophosphoric acid.The latter, being a negatively charged anhydrous acid of phosphate, becomes reactive when heated.or example, disodium pyrophosphate is used in the processing of leather to prevent oxidation that may lead to staining from ferrous oxides. It is also used to improve the fluidity of cement and petroleum when added to act as a plasticizer.