A new source for 4-methyl sterols in freshwater sediments: Utricularia neglecta L. (Lentibulariaceae)

Klink, Georges; Dreier, Francine; Buchs, Armand; Gülaçar, Fazil O.

doi:10.1016/0146-6380(92)90045-y

Cited by 15 publications

(4 citation statements)

References 26 publications

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“…Some marine phytoplankton can . Closely related 4a-methyl sterols have also been identified in marine prymnesiophyte algae (Volkman et al 1990) and in a submerged vascular plant from Motte Lake (Klink et al 1992). Matsumoto et al (1982) have identified 24-ethylcholesterol as the dominant sterol in sediments and epibenthic blue-green algae from saline lakes in Victoria Land, Antarctica.…”

Section: Sources and Diagenesis Of Sterols In Lake Sedimentsmentioning

confidence: 99%

Physics and Chemistry of Lakes

Lerman¹,

Imboden²,

Gat³

et al. 1995

125

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Section: Sources and Diagenesis Of Sterols In Lake Sedimentsmentioning

confidence: 99%

Physics and Chemistry of Lakes

Lerman¹,

Imboden²,

Gat³

et al. 1995

125

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“…5d, e). They are indicative of prymnesiophyta, certain bacteria, diatoms, dinoflagellates and aquatic macrophytes in lacustrine or marine environments (Wolff et al, 1986;Klink et al, 1992;Peters et al, 2005). 4-Methylsteranes are not identified in CS liquid pyrolysate (Fig.…”

Section: Steranesmentioning

confidence: 99%

A comparative study of the molecular and isotopic composition of biomarkers in immature oil shale (Aleksinac deposit, Serbia) and its liquid pyrolysis products (open and closed systems)

Gajica

Šajnović

Stojanović

et al. 2022

Marine and Petroleum Geology

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“…19 In contrast, although also present in some algae, [20][21][22] the C 29 compounds are ubiquitous in vascular plants, often being the dominant sterols. [23][24] The relative importance of these two sources in the formation of OM will depend on the type of environment surrounding the site, on the proximity to sources of land-derived organic matter, and on the abundance and type of phytoplankton present. 11 The sampled sites in the present study were situated close to land and places like or such that, so the origin of 14-ethylcholest-5-en-3β-ol is pointed as terrigenous.…”

Section: Sterols Alkanols and Ketonesmentioning

confidence: 99%

A preliminary investigation of the polar lipids in recent tropical sediments from aquatic environments at Campos dos Goytacazes, Brazil

Azevedo¹

2003

J. Braz. Chem. Soc.

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As frações polares dos extratos de sedimentos dos rios Imbé, Urubu e Ururaí e da Lagoa de Cima foram analisados por cromatografia gasosa e por cromatografia gasosa acoplada a espectrometria de massas. Os seguintes compostos se encontravam dominantes entre os esteróis: colest-5-en-3β-ol, 24-metilcolest-5-en-3β-ol, 24-etilcolest-5-en-3β-ol, 24-etilcolest-5,22-dien-3β-ol e seus respectivos 5α-isômeros. Nos sedimentos desses sistemas aquáticos, os esteróis C29 se encontravam mais abundantes, enfatizando a alta contribuição de plantas superiores para a matéria orgânica. Já no Rio Ururaí, há um predomínio do colesterol, refletindo a maior contribuição de algas/bactérias. Olean-12-en-3β-ol (β-amirina) e friedelan-3-ona foram os triterpenóides que prevaleceram nos sedimentos dos rios Imbé e Urubu, mas não foram detectados na Lagoa de Cima. As informações retiradas das análises dos quatro sedimentos apontaram para uma contribuição mista para a matéria orgânica: plantas superiores e alga/zooplancton.The polar fractions extracted from sediments of the Imbé, Urubu, and Ururaí rivers and from Lake de Cima were analyzed using gas chromatography and gas chromatography-mass spectrometry. In the samples, cholest-5-en-3β-ol, 24-methylcholest-5-en-3β-ol, 24-ethylcholest-5-en-3β-ol, 24-ethylcholesta-5,22-dien-3β-ol and their 5α-counterparts were dominant among the sterols. Sediments of theses water bodies have the C 29 sterols as the most abundant, emphasizing a higher plant input. In the Ururaí River, cholest-5-en-3β-ol predominated, reflecting a major algal contribution. Olean-12-en-3β-ol (β-amyrin) and friedelan-3-one were prevalent among the triterpenoids in the Imbé and the Urubu sediments, but were not detected at Lake de Cima. Samples of the Imbé and Urubu rivers contained appreciable concentrations of n-alkanols. They ranged from C 14 to C 32 with a maximum at C 16 and with a second maximum in C 28 . Results of all four sediments point to a mixed contribution of higher plants and algae/zooplankton. Alkanols found in these water bodies indicate a greater contribution of higher plant material, while in sediments from the Ururaí algae/zooplankton were the main sources of the organic matter.

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A new source for 4-methyl sterols in freshwater sediments: Utricularia neglecta L. (Lentibulariaceae)

Cited by 15 publications

References 26 publications

Physics and Chemistry of Lakes

Physics and Chemistry of Lakes

A comparative study of the molecular and isotopic composition of biomarkers in immature oil shale (Aleksinac deposit, Serbia) and its liquid pyrolysis products (open and closed systems)

A preliminary investigation of the polar lipids in recent tropical sediments from aquatic environments at Campos dos Goytacazes, Brazil

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