Figure - PMC

Skip to main content

An official website of the United States government

Here's how you know

Here's how you know

Official websites use .gov
A .gov website belongs to an official government organization in the United States.

Secure .gov websites use HTTPS
A lock ( ) or https:// means you've safely connected to the .gov website. Share sensitive information only on official, secure websites.

View full-text article in PMC

. 2016 Apr 1;59(3):337–350. doi: 10.1111/pala.12238

Search in PMC
Search in PubMed
View in NLM Catalog
Add to search

© 2016 The Authors. Palaeontology published by John Wiley & Sons Ltd on behalf of The Palaeontological Association.

This is an open access article under the terms of the Creative Commons Attribution License, which permits use, distribution and reproduction in any medium, provided the original work is properly cited.

PMC Copyright notice

Partial TMAH‐assisted Py‐GCMS total ion current chromatograms of Libros microstructures (A) and matrix (B); insets (not to scale) show the m/z 97 + 98 + 111 + 112 + 125 + 126 + 139 + 140 + 153 + 154 chromatograms of dotted areas revealing the presence and distribution of alkylated thiophene moieties. *, alkylated thiophene; +, fatty acid methyl ester; –, n‐alkane/n‐alkene doublets; #, benzene derivative; ○, phenol derivative; ▲, benzoic acid derivative; , hopane moieties; a, dimethyl disulfide; b, methylsulfonic acid methyl ester; c, propenoic acid butyl ester; d, succinic acid dimethylester; e, methyl succinic acid dimethyl ester; f, methyl indolinone; g, phthalate; h, 2,5‐dimethoxy benzoic acid methyl ester (or isomer); i, contaminant; j, methyl phenylsulfide; k, 3,5‐dimethyl‐2‐(methylsulfanyl) thiophene. c_x indicates the carbon chain length and numbers refer to the alkylated thiophenes listed in Table 1.

Inline graphic — Partial TMAH‐assisted Py‐GCMS total ion current chromatograms of Libros microstructures (A) and matrix (B); insets (not to scale) show the m/z 97 + 98 + 111 + 112 + 125 + 126 + 139 + 140 + 153 + 154 chromatograms of dotted areas revealing the presence and distribution of alkylated thiophene moieties. *, alkylated thiophene; +, fatty acid methyl ester; –, n‐alkane/n‐alkene doublets; #, benzene derivative; ○, phenol derivative; ▲, benzoic acid derivative; , hopane moieties; a, dimethyl disulfide; b, methylsulfonic acid methyl ester; c, propenoic acid butyl ester; d, succinic acid dimethylester; e, methyl succinic acid dimethyl ester; f, methyl indolinone; g, phthalate; h, 2,5‐dimethoxy benzoic acid methyl ester (or isomer); i, contaminant; j, methyl phenylsulfide; k, 3,5‐dimethyl‐2‐(methylsulfanyl) thiophene. c_x indicates the carbon chain length and numbers refer to the alkylated thiophenes listed in Table 1.