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      Types of biogenic quartz and its coupling storage mechanism in organic-rich shales: A case study of the Upper Ordovician Wufeng Formation to Lower Silurian Longmaxi Formation in the Sichuan Basin, SW China

      , , , , ,
      Petroleum Exploration and Development
      Elsevier BV

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          Self-assembly of highly phosphorylated silaffins and their function in biosilica morphogenesis.

          Silaffins are uniquely modified peptides that have been implicated in the biogenesis of diatom biosilica. A method that avoids the harsh anhydrous hydrogen fluoride treatment commonly used to dissolve biosilica allows the extraction of silaffins in their native state. The native silaffins carry further posttranslational modifications in addition to their polyamine moieties. Each serine residue was phosphorylated, and this high level of phosphorylation is essential for biological activity. The zwitterionic structure of native silaffins enables the formation of supramolecular assemblies. Time-resolved analysis of silica morphogenesis in vitro detected a plastic silaffin-silica phase, which may represent a building material for diatom biosilica.
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            Environmental influences on the chemical composition of shales and clays

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              Shale gas in China: Characteristics, challenges and prospects (II)

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                Author and article information

                Journal
                Petroleum Exploration and Development
                Petroleum Exploration and Development
                Elsevier BV
                18763804
                August 2021
                August 2021
                : 48
                : 4
                : 813-823
                Article
                10.1016/S1876-3804(21)60068-X
                3b35115c-c423-4f91-bd6c-8a8a2de6191f
                © 2021

                https://www.elsevier.com/tdm/userlicense/1.0/

                http://creativecommons.org/licenses/by-nc-nd/4.0/


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