Biomarkers (molecular fossils) as geochemical indicators of life

Simoneit, Bernd R.T.

doi:10.1016/j.asr.2003.04.045

Cited by 60 publications

(33 citation statements)

References 34 publications

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“…Since there is no significant difference in ambient temperature during the monitoring period, the revolatilisation effect is probably not the major factor responsible for this decline. The strong positive correlation (R=0.95) between annual mean sum (P+V) of individual PAH (2000-2001) vs PAH (2001-2004 observed at the BROS suggests that the overall PAHs distribution is constant at the traffic site. This finding is in consistent with the high value of R=0.99 reported by Laurie (2002) at the same site, indicating that "change of source fingerprint" might have minor importance for the reduction of LMW PAHs.…”

Section: Discussionmentioning

confidence: 96%

“…The original term applied to biomarkers was chemical fossils, which evolved to biological marker compounds and were then contracted to the currently popular term biomarker (Simoneit et al, 2004). The enormous range of organic compounds detected in urban particles may be divided into two major source groups; primary condensates and oxidised hydrocarbons.…”

Section: Introductionmentioning

confidence: 99%

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Fingerprint of Carcinogenic Semi-Volatile Organic Compounds (SVOCs) during Bonfire Night

Pongpiachan

2013

Asian Pacific Journal of Cancer Prevention

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It is well known that increased incidences of lung, skin, and bladder cancers are associated with occupational exposure to PAHs. Animal studies show that certain PAHs also can affect the hematopoietic and immune systems and can produce reproductive, neurologic, and developmental effects. As a consequence, several studies have been attempted to investigate the fate of PAHs in atmospheric environment during the past decades. However, there is still a lack of information in regard to the atmospheric concentration of PAHs during the "Bon Fire Night". In this study, twenty-three polycyclic aromatic hydrocarbons and twenty-eight aliphatics were identified and quantified in the PM 10

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Section: Discussionmentioning

confidence: 96%

Section: Introductionmentioning

confidence: 99%

Fingerprint of Carcinogenic Semi-Volatile Organic Compounds (SVOCs) during Bonfire Night

Pongpiachan

2013

Asian Pacific Journal of Cancer Prevention

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“…São constituídos principalmente de carbono e hidrogênio, e em menor quantidade, enxofre, oxigênio e nitrogênio. 6,7 Os biomarcadores geoquímicos são representados por uma ampla variedade de compostos orgânicos. Como exemplos, têm-se alcanos lineares, alcanos ramificados, alcenos, hidrocarbonetos policíclicos aromáticos, terpenos, hopanos, esteranos, compostos orgânicos sulfurados, alcoóis graxos, ácidos graxos com diferentes graus de insaturações e/ou hidroxilações, alquenonas, esteróis, pigmentos e feopigmentos, geopolímeros, entre outros.…”

Section: Introductionunclassified

Evaluation of Geochemical Biomarkers and Salinity in Sediment Core in the Lagoa do Ribeirão in Paulo Lopes, SC

Rau¹,

Bataglion²,

Madureira³

2013

Revista Virtual De Química

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Evidences obtained of increased salinity, silt+clay particle size fraction, total sulfur, dinosterol and smaller amounts of geochemical biomarkers of terrestrial sources indicate the predominance of marine environment, when the relative sea level was higher than the current level. There was a period of transition from marine to freshwater environment, characterized by the reduction of organic carbon and an increment in the amount of sand and biomarkers of terrestrial sources. After this period, the freshwater began to predominate in this lagoon, with higher amount of geochemical biomarkers of terrestrial origin such as linear alkanes n-C 27 , n-C 29 , n-C 31 , friedelin, taraxerol, β-sitosterol and campesterol and the reduction in salinity. The highest concentrations of biomarkers are located mainly in the east, southeast, south and southwest of the lagoon. These areas are close to the hills of Serra do Tabuleiro, the river Paulo Lopes entrance and exit of the river of Lagoa do Ribeirão.Keywords: Geochemical biomarkers; salinity; sediment core; Lagoa do Ribeirão. ResumoOs biomarcadores geoquímicos são compostos presentes na geosfera e estão relacionados com os precursores biológicos específicos, permitindo obter informações sobre as mudanças ambientais que ocorreram ou ainda ocorrem nos ecossistemas aquáticos e suas vizinhanças. A Lagoa do Ribeirão, localizada no município de Paulo Lopes, SC, é o sistema aquático avaliado neste trabalho através de biomarcadores geoquímicos e salinidade, principalmente. Os dados obtidos indicam a predominância de ambiente marinho, quando o nível relativo do mar estava mais elevado que o nível atual, sendo observados os aumentos da salinidade, da fração granulométrica silte+argila, da quantidade de enxofre total, dinosterol e das menores quantidades de biomarcadores geoquímicos de fontes terrestres. Houve um período de transição do ambiente marinho para o ambiente de água doce, caracterizado pela diminuição de carbono orgânico total e aumento da quantidade de areia e de biomarcadores de fontes terrestres. Após este período, a água doce começou a predominar nesta lagoa, caracterizada pelo aumento da quantidade de biomarcadores geoquímicos de origem terrestre como alcanos lineares n-C 27 , n-C 29 , n-C 31 , f iedeli a, ta axe ol, β-sitosterol e campesterol e pela diminuição da salinidade. Os biomarcadores com maiores concentrações estão situados principalmente nas regiões leste, sudeste, sul e sudoeste da lagoa, sendo estas próximas aos morros da Serra do Tabuleiro, entrada do rio Paulo Lopes e a saída do rio da Lagoa.

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“…They are reliable because they cannot be synthesized by non-biological processes and can be preserved over long geological times with little change in the original structure of the living organisms or parent molecules (Simoneit, 2004).…”

Section: Biomarker Analysismentioning

confidence: 99%

Paleoenvironments and Geochemical Signals from the Late Barremian to the Middle Aptian in a Tethyan Marginal Basin, Northeast Spain: Implications for Carbon Sequestration in Restricted Basins

Sanchez-Hernandez¹

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C of ~5‰). However, a low enrichment of redox-sensitive trace elements indicates that the basin did not achieve anoxic conditions. The results also suggest that a shallower-phase of the basin, coeval with platform progradation, may have increased ventilation of the basin at the same time that heightened sedimentation rates and additional input of organic matter from terrestrial sources increased the burial and preservation rate of TOC in the sediment.

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Biomarkers (molecular fossils) as geochemical indicators of life

Cited by 60 publications

References 34 publications

Fingerprint of Carcinogenic Semi-Volatile Organic Compounds (SVOCs) during Bonfire Night

Fingerprint of Carcinogenic Semi-Volatile Organic Compounds (SVOCs) during Bonfire Night

Evaluation of Geochemical Biomarkers and Salinity in Sediment Core in the Lagoa do Ribeirão in Paulo Lopes, SC

Paleoenvironments and Geochemical Signals from the Late Barremian to the Middle Aptian in a Tethyan Marginal Basin, Northeast Spain: Implications for Carbon Sequestration in Restricted Basins

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