The C30 diahopane in sedimentary rock extracts and oils may be derived from bacterial hopanoid precursors that have experienced oxidation and rearrangement by clay-mediated acidic catalysis.
Since bentonite has a very good sorption capability for many radionuclides, the displacement of the clay might lead to a "clay-mediated" contaminant transport into the rock.
Pt-NC gels were synthesized through exfoliated clay-mediated in situ reduction of Pt ions in the NC gel at ambient temperature.
The results reveal that the acidic clay acted as clay-mediated acidic catalysis in the formation and degradation of rearranged hopanes, but there is no positive correlation between clay content and rearranged hopanes in lacustrine source rocks.
Numerous studies have reinforced the hypothesis of a clay-mediated origin of life.
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In accordance with the methods of Wang et al. [ 14], Jar-test was employed, with some modification, to determine bioflocculant concentration optimally mediating flocculation of Kaolin clay suspension (4.0 g/L).
By intercalation of organic polymers into the layered clay galleries, organic inorganic nanocomposites can be formed in which the clay framework serves to protect, stabilize and orient the polymer, and to mediate its function (Lu et al. 2001).
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