Comparative Perspectives on Extraction Methods for Organic Metabolites and Pollutants from Lichens

Forbes, Patricia B.C.; Wat, Leandri van der; Strumpher, Johanna

doi:10.1002/9781119593249.ch2

Cited by 2 publications

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“…Conventional organic solvents (such as hexane and acetone) are commonly used for its extraction as hydrophobic [ 129 ]. Our study used n-hexane with Soxhlet extraction method, which is of choice in studying organic analytes extracted from lichens [ 130 ]. It is still used to date to extract organic air pollutants, organochlorinated pesticides and insecticides from the lichen matrix [ 131 , 132 ].…”

Section: Resultsmentioning

confidence: 99%

Phytochemical Investigation of New Algerian Lichen Species: Physcia Mediterranea Nimis

et al. 2021

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The present study provides new data concerning the chemical characterisation of Physcia mediterranea Nimis, a rare Mediterranean species belonging to the family Physciaceae. The phytochemical screening was carried out using GC-MS, HPLC-ESI-MS-MS, and NMR techniques. Hot extraction of n-hexane was carried out, followed by separation of the part insoluble in methanol: wax (WA-hex), from the part soluble in methanol (ME-hex). GC-MS analysis of the ME-hex part revealed the presence of methylbenzoic acids such as sparassol and atraric acid and a diterpene with a kaurene skeleton which has never been detected before in lichen species. Out of all the compounds identified by HPLC-ESI-MS-MS, sixteen compounds are common between WA-hex and ME-hex. Most are aliphatic fatty acids, phenolic compounds and depsides. The wax part is characterised by the presence of atranorin, a depside of high biological value. Proton 1H and carbon 13C NMR have confirmed its identification. Atranol, chloroatranol (depsides compound), Ffukinanolide (sesquiterpene lactones), leprolomin (diphenyl ether), muronic acid (triterpenes), and ursolic acid (triterpenes) have also been identified in ME-hex. The results suggested that Physcia mediterranea Nimis is a valuable source of bioactive compounds that could be useful for several applications as functional foods, cosmetics, and pharmaceuticals.

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Section: Resultsmentioning

confidence: 99%

Phytochemical Investigation of New Algerian Lichen Species: Physcia Mediterranea Nimis

et al. 2021

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Historical exposomics: a manifesto

Aurich,

Horaniet Ibanez,

Hissler

et al. 2023

Exposome

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The exposome complements information captured in the genome by covering all external influences and internal (biological) responses of a human being from conception onwards. Such a paradigm goes beyond a single scientific discipline and instead requires a truly interdisciplinary approach. The concept of “historical exposomics” could help bridge the gap between “nature” and “nurture” using both natural and social archives to capture the influence of humans on earth (the Anthropocene) in an interdisciplinary manner. The LuxTIME project served as a test bed for an interdisciplinary exploration of the historical exposome, focusing on the Belval area located in the Minett region in southern Luxembourg. This area evolved from a source of mineral water to steel production through to the current campus for research and development. This article explores the various possibilities of natural and social archives that were considered in creating the historical exposome of Belval and reflects upon possibilities and limitations of the current approaches in assessing the exposome using purely a natural science approach. Issues surrounding significance, visualization, and availability of material suitable to form natural archives are discussed in a critical manner. The “Minett Stories” are presented as a way of creating new historical narratives to support exposome research. New research perspectives on the history of the Anthropocene were opened by investigating the causal relationships between factual evidence and narrative evidence stemming from historical sources. The concept of historical exposome presented here may thus offer a useful conceptual framework for studying the Anthropocene in a truly interdisciplinary fashion.

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Comparative Perspectives on Extraction Methods for Organic Metabolites and Pollutants from Lichens

Cited by 2 publications

References 95 publications

Phytochemical Investigation of New Algerian Lichen Species: Physcia Mediterranea Nimis

Phytochemical Investigation of New Algerian Lichen Species: Physcia Mediterranea Nimis

Historical exposomics: a manifesto

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