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Table 3 Biomarker ratios for different microbial consortium from laboratory degraded oil and from Pampo Sul field (P2).

From: Could petroleum biodegradation be a joint achievement of aerobic and anaerobic microrganisms in deep sea reservoirs?

Consortia Biomarkers ratios Time (days)
   Control 10 20 30 40 50 60 P2
Aerobic C 28 TT/C 35 H a 0.91 0.93 1.02 1.04 1.23 1.31 1.35 1.10
  C 29 TT/C 35 H a 1.00 1.30 1.34 1.42 1.62 1.62 1.63 1.47
  C 35 H/C 30 H b 0.16 0.12 0.12 0.12 0.13 0.14 0.14 0.12
  Ts/(Ts+Tm) c 0.41 0.32 0.41 0.41 0.41 0.43 0.43 0.32
  IH d 8.41 8.24 8.13 8.10 7.50 6.90 6.71 7.36
  Sterane/Hopane e 0.35 0.31 0.38 0.38 0.54 0.79 0.80 0.94
   Control 30 60 90 120 150 180 P2
Anaerobic C 28 TT/C 35 H 0.92 1.30 0.91 1.02 0.62 0.60 0.60 1.10
  C 29 TT/C 35 H 0.94 1.41 1.22 1.23 0.81 0.73 0.61 1.47
  C 35 H/C 30 H 0.15 0.12 0.14 0.14 0.19 0.19 0.18 0.12
  Ts/(Ts+Tm) 0.43 0.32 0.43 0.43 0.44 0.44 0.52 0.32
  IH 8.31 7.14 7.70 7.94 9.22 9.42 9.63 7.36
  Sterane/Hopane 0.73 0.84 0.84 0.81 0.74 0.11 0.10 0.94
   Control 30 60 90 120 150 180 P2
Mixed Aerobic/Anaerobic C 28 TT/C 35 H 0.92 1.25 1.52 1.03 1.13 0.84 0.92 1.10
  C 29 TT/C 35 H 0.94 1.17 1.30 1.55 1.75 1.43 1.16 1.47
  C 35 H/C 30 H 0.15 0.15 0.13 0.12 0.12 0.10 0.14 0.12
  Ts/(Ts+Tm) 0.29 0.24 0.27 0.27 0.28 0.28 0.28 0.32
  IH 8.31 7.19 6.78 7.47 7.65 7.86 8.57 7.36
  Sterane/Hopane 0.36 0.95 1.16 0.72 0.57 0.54 0.07 0.94
  1. aCalculated from m/z 191 mass chromatogram peak areas of the C28 - C29 tricyclic terpanes (TT) (22R + 22S). C35 17α.21β(H)-homohopane (C35H) (22R + 22S) and C30 17α.21β(H)-hopane (C30H); bCalculated from m/z 191 mass chromatogram peak areas of the [C35 (22R+22S)/(C31-C35)(22R+22S) homohopanes] × 100; cCalculated from m/z 191 mass chromatogram peak areas of the C27 17α(H)-22.29.30-trisnorhopane (Tm) and C27 18α(H)-22.29.30-trisnorneohopane (Ts); dCalculated from m/z 191 mass chromatogram peak areas of the [C35 (22R + 22S)/(C31-C35) (22R + 22S) homohopanes] × 100; eCalculated from m/z 217 mass chromatogram peak areas of the C27, C28 and C29 ααα (20R + 22S) and αββ (20R + 22S) steranes and from m/z 191 of the C29-C33 17α(H)-hopanes (20R + 22S);