Hopanoids are mainly derived from bacteriohopanpolyols that occur especially in bacteria. show the importance of bacterial lipid contributions in geological materials. In this work. GC-MS and RP-HPLC-APCI-MS analyses of hopanoid biomarkers in oxic and anoxic sediment samples from Lake Cadagno (Swiss Alps) and Lake Voua de la Motte (Haute Savoie. https://www.roneverhart.com/BT21-Pop-Vinyl-Figure-Tata-687/