Controls on the stratigraphic distribution and nitrogen isotopic composition of zinc, vanadyl and free base porphyrins through Oceanic Anoxic Event 2 at Demerara Rise

Earth & Environmental Sciences

• porphyrin 100%
• isotopic composition 60%
• zinc 57%
• nitrogen 42%
• metal 31%
• distribution 25%
• sediment 14%
• water column 9%
• sulfide 9%
• isotope 8%
• ecological balance 7%
• Turonian 6%
• sediment-water interface 6%
• black shale 6%
• kerogen 6%
• ligand 6%
• chlorophyll 5%
• total organic carbon 5%
• chlorophyll a 5%
• fractionation 4%
• analysis 4%
• organic matter 3%
• biomass 3%
• product 2%
• effect 2%

Chemical Compounds

• Porphyrin 59%
• Nitrogen 42%
• Metal 21%
• Tetrapyrrole 15%
• Sulfide 9%
• Kerogen 8%
• Octaethylporphyrin 8%
• Transmetalation 7%
• Column Like Crystal 7%
• Metalloporphyrin 6%
• Organic Carbon 6%
• Chlorophyll 6%
• Organic Matter 6%
• Isotope Effect 5%
• Black 5%
• Fractionation 5%
• Isotope 5%
• Titration 4%
• Error 4%
• pH Value 2%
• Application 1%