A comparative study of macromolecular substances of a Coorongite and cell walls of the extant alga Botryococcus braunii
- Delft Univ. of Technology (Netherlands)
- UA CNRS 1381, Paris (France)
A Coorongite sample of Lake Balkash (Kazakhstan, CIS) was analyzed in detail by [sup 13]C-NMR, FTIR, Curie point pyrolysis-gas chromatography-mass spectrometry, and by fractionation and derivatization with dimethyldisulphide of an off-line pyrolysate. Both the spectroscopic and the pyrolysis data indicate that the Coorongite was derived almost entirely of organic matter of the green microalga Botryococcus braunii race A. Homologous series of n-alkanes and n-alk-1-enes in all pyrolysates indicated the presence of algaenan, a highly aliphatic and resistant cell wall biomacromolecule of B. braunii race A. Highly specific pyrolysis products, in particular n-alkadienes, n-alkatrienes, alk-1-en-[omega][sup 9]-ones, and alk-1-en-[omega][sup 10]-ones with C[sub 27], C[sub 29], and C[sub 31] carbon atoms clearly indicated that C[sub 27], C[sub 29], and C[sub 31] alkadienes and alkatrienes, originally present in B. braunii race A as such, were cross-linked by oxygen during the very early stages of diagenesis under oxic conditions. Furthermore, several types of dialkenylethers, also present as soluble lipids in B. braunii race A, had undergone cross-linking by oxygen as well. These cross-linked lipids contribute significantly to the Coorongite and clearly demonstrate that under specific conditions kerogen consists of both preserved biomacromolecules and insoluble, cross-linked, low-molecular-weight lipids. 43 refs., 14 figs., 1 tab.
- OSTI ID:
- 6289596
- Journal Information:
- Geochimica et Cosmochimica Acta; (United States), Vol. 57:9; ISSN 0016-7037
- Country of Publication:
- United States
- Language:
- English
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Related Subjects
02 PETROLEUM
37 INORGANIC
ORGANIC
PHYSICAL AND ANALYTICAL CHEMISTRY
ALGAE
QUANTITATIVE CHEMICAL ANALYSIS
CELL WALL
KEROGEN
CHEMICAL COMPOSITION
PYROLYTIC OILS
ALKANES
ALKENES
ETHERS
GAS CHROMATOGRAPHY
LIPIDS
NUCLEAR MAGNETIC RESONANCE
BITUMINOUS MATERIALS
CARBONACEOUS MATERIALS
CELL CONSTITUENTS
CHEMICAL ANALYSIS
CHROMATOGRAPHY
FUELS
HYDROCARBONS
MAGNETIC RESONANCE
MATERIALS
MATTER
OILS
ORGANIC COMPOUNDS
ORGANIC MATTER
ORGANIC OXYGEN COMPOUNDS
OTHER ORGANIC COMPOUNDS
PLANTS
PYROLYSIS PRODUCTS
RESONANCE
SEPARATION PROCESSES
SYNTHETIC FUELS
091000* - Biomass Fuels- Properties & Composition- (1990-)
023000 - Petroleum- Properties & Composition
400102 - Chemical & Spectral Procedures