Journal ArticleDOI
Eustigmatophyte microalgae are potential sources of C29 sterols, C22-C28 n-alcohols and C28-C32 n-alkyl diols in freshwater environments
TLDR
These results add to the growing list of microalgae that contain a high proportion of 24-ethylcholesterol, which is more typically associated with higher plants, and confirm that the same class of compounds occurs in freshwater eustigmatophytes.About:
This article is published in Organic Geochemistry.The article was published on 1999-05-01. It has received 317 citations till now. The article focuses on the topics: Eustigmatophyte.read more
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Applications of organic geochemistry to paleolimnological reconstructions: a summary of examples from the Laurentian Great Lakes
TL;DR: The organic matter content of lake sediments contains information that helps to reconstruct past environmental conditions, evaluate histories of climate change, and assess impacts of humans on local ecosystems as discussed by the authors, and serve as proxies of organic matter delivery and accumulation.
Journal ArticleDOI
Sterols in microorganisms.
TL;DR: This review describes the variety of sterol structures found in microalgae, yeasts, fungi, protozoans and microheterotrophs, and possible application areas for sterols derived from mass culture of micro algae and other microorganisms are highlighted.
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Isotope organic geochemistry
TL;DR: The present-day state as well as the history of isotope organic geochemistry is reviewed in this article, where theoretical aspects of fractionation in a system of complex organic molecules, fractionation of carbon isotopes in the biosphere, isotopes as applied to study the transformation of organic matter, geochemistry of oil and gas, evolution of the carbonate-organic carbon system and aspects of astrobiology are considered.
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Origins of lipid biomarkers in Santa Monica Basin surface sediment: a case study using compound-specific Δ 14 C analysis
TL;DR: In this article, Δ 14 C values were reported for 31 different lipid biomarker molecules obtained from Santa Monica Basin and Santa Barbara Basin surface sediments, including long-chain n-alkanes, fatty acids (as methyl esters; FAMEs), n -alcohols, C 30 midchain ketols and diols, sterols, hopanols, and C 40 isoprenoid side chains from the ether-linked glycerols of Archaea.
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Lacustrine source rock deposition in response to co-evolution of environments and organisms controlled by tectonic subsidence and climate, Bohai Bay Basin, China
TL;DR: In this paper, three Paleogene syn-rift intervals from the Bohai Bay Basin, the most petroliferous basin in China, were analyzed with sedimentological and geochemical techniques to characterize the lateral source rock heterogeneities, revealing the environmental and ecological changes through geologic time and to construct depositional models for lacustrine source rocks under different tectonic and climatic conditions.
References
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Journal ArticleDOI
A rapid method of total lipid extraction and purification.
E. G. Bligh,W. J. Dyer +1 more
TL;DR: The lipid decomposition studies in frozen fish have led to the development of a simple and rapid method for the extraction and purification of lipids from biological materials that has been applied to fish muscle and may easily be adapted to use with other tissues.
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A review of sterol markers for marine and terrigenous organic matter
TL;DR: It is indicated that inferences drawn from sterol distributions regarding sources of organic matter must be made with caution and should be supported using other lipid data, and that in ancient sediments and crude oils a high proportion of C 29 steranes need not indicate that most of the organic matter was derived from vascular plants.
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Lacustrine organic geochemistry—an overview of indicators of organic matter sources and diagenesis in lake sediments
TL;DR: The factors affecting the amounts and types of organic matter in lacustrine sediments are summarized in a review, and synthesis, of published studies as discussed by the authors, and the interplay of the factors influencing the organic matter content of lake sediments is illustrated by overviews of sedimentary records of four lake systems--Lake Biwa (Japan), Lake Greifen (Switzerland), Lake Washington (Pacific Northwest), and the Great Lakes (American Midwest).