Molecular characterization of fossil palynomorphs by transmission micro-FTIR spectroscopy: Implications for hydrocarbon source evaluation

Optical thermal maturity parameters and organic geochemical alteration at low grade diagenesis to anchimetamorphism: A review

“…The application of acetic acid, bleach and mineral spirit solution as used in the sample preparation by Nowaczewski (2011) and Olcott Marshall et al (2013) may be problematic as it is unknown whether these reagents have effects on the chemical composition of palynomorphs. Oxidizing agents in particular should always be avoided while the commonly applied hydrochloric/hydrofluoric acid digestion as employed by Dutta et al (2010Dutta et al ( , 2013 is not thought to significantly influence the chemical composition of fossil organic material as long as it is not very immature (for further discussion see van Bergen, 1999).…”

“…A-and C-factors which represent relative intensities of the aliphatic and C=O groups, respectively, are both low elucidating that aromatic compounds prevail over aliphatic components. In an I 1 vs. CH 2 /CH 3 and a C-factor vs. A-factor diagram scolecodonts plot near chitinozoans (Dutta et al, 2013).…”

“…Using µ-IR spectroscopy Kjellström (1968) and Dutta et al (2013) analyzed Palaeozoic Tasmanites and Leiosphaerida. Prasinophytes are composed of aliphatic building blocks which are connected with ester and ether cross links and therefore these algae show high A-and C-factor values in µ-FTIR analyses (Dutta et al, 2013).…”

Polyaromatic hydrocarbon inner-structured carbon nanodots for interfacial enhancement of carbon fiber composite

“…S13 †) in the 1000-4000 cm À1 region, and especially in the 1000-1500 cm À1 region. [38][39][40][41] The Raman spectrum of the heat-treated CNDs (Fig. 3A) contains a broad peak near 1360 cm À1 and a sharp peak at 1587 cm À1 , which does not directly represent the defects and graphite structure for a hydrothermal immature carbon.…”

Effects of poplar addition on tar formation during the co-pyrolysis of fat coal and poplar at high temperature

“…The characteristic band assignments can be obtained from previous work. 23,[25][26][27] Furthermore, the detailed structure information can be obtained by the curve-tting of two FT-IR regions (3000 to 2800 cm À1 and 1800 to 1490 cm À1 ). The structure parameters Afactor and CH 2 /CH 3 can be calculated by the following equations: [25][26][27][28] A-factor ¼ (A 3000-2800 cm À1 )/(A 3000-2800 cm À1 + A 1650-1490 cm À1 ) (1)…”