Hydroxy and ketonic androstanes: a new class of sterol diagenetic product in peat

Avsejs, Luke A.; Nott, Chris J.; Maxwell, James R.; Evershed, Richard P.

doi:10.1016/s0146-6380(98)00026-6

Cited by 10 publications

(2 citation statements)

References 12 publications

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“…The genus Anaeroplasma found in soil, belonging to Anaeroplasmatales , is a strictly anaerobic sterol-utilizing bacteria [34]. The sterol contents in different types of lignite deposits have been studied widely [60]. The sterol contents in coal might be further utilized by Anaeroplasma in soil.…”

Section: Discussionmentioning

confidence: 99%

Bioconversion of coal to methane by microbial communities from soil and from an opencast mine in the Xilingol grassland of northeast China

Wang

Cui

et al. 2019

Biotechnol Biofuels

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Background The Xilingol grassland ecosystem has abundant superficial coal reserves. Opencast coal mining and burning of coal for electricity have caused a series of environmental challenges. Biogenic generation of methane from coal possesses the potential to improve economic and environmental outcomes of clean coal utilization. However, whether the microbes inhabiting the grassland soil have the functional potential to convert coal into biomethane is still unclear. Results Microbial communities in an opencast coal mine and in grassland soil covering and surrounding this mine and their biomethane production potential were investigated by Hiseq sequencing and anaerobic cultivation. The microbial communities in covering soil showed high similarity to those in the surrounding soil, according to the pairwise weighted UniFrac distances matrix. The majority of bacterial communities in coal and soil samples belonged to the phyla Firmicutes, Bacteroidetes, Actinobacteria and Proteobacteria. The dominant bacterial genera in grassland soil included Gaiella, Solirubrobacter, Sphingomonas and Streptomyces; whereas, the most abundant genus in coal was Pseudarthrobacter. In soil, hydrogenotrophic Methanobacterium was the dominant methanogen, and this methanogen, along with acetoclastic Methanosarcina and methylotrophic Methanomassiliicoccus, was detected in coal. Network-like Venn diagram showed that an average of 28.7% of microbial communities in the samples belonged to shared genera, indicating that there is considerable microbial overlap between coal and soil samples. Potential degraders and methanogens in the soil efficiently stimulated methane formation from coal samples by the culturing-based approach. The maximum biogenic methane yields from coal degradation by the microbial community cultured from grassland soil reached 22.4 μmol after 28 day. Conclusion The potential microbial coal degraders and methanogenic archaea in grassland soil were highly diverse. Significant amounts of biomethane were generated from coal by the addition of grassland soil microbial communities. The unique species present in grassland soil may contribute to efficient methanogenic coal bioconversion. This discovery not only contributes to a better understanding of global microbial biodiversity in coal mine environments, but also makes a contribution to our knowledge of the synthetic microbiology with regard to effective methanogenic microbial consortia for coal degradation.

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Section: Discussionmentioning

confidence: 99%

Bioconversion of coal to methane by microbial communities from soil and from an opencast mine in the Xilingol grassland of northeast China

Wang

Cui

et al. 2019

Biotechnol Biofuels

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“…Plentiful steroid compounds, including Δ 5 -sterols, stanols and Δ 2 -sterenes, occur in the Dajiuhu peat samples (Figure 3, Table 2). These compounds are all dominated by C 29 homologues, which is a common feature in peat deposits (Avsejs et al, 1998; Ortiz et al, 2010; Xie et al, 2004). Lipid analyses of modern peat-forming plants reveal that Sphagnum and sedges are the major contributors of C 29 sterols (Baas et al, 2000; Huang et al, 2011; Pancost et al, 2002).…”

Section: Resultsmentioning

confidence: 99%

Moisture conditions during the Younger Dryas and the early Holocene in the middle reaches of the Yangtze River, central China

Huang

Meyers

et al. 2012

The Holocene

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The last glacial–interglacial climate transition in East Asia was characterized by an intensified monsoon, but knowledge about hydrological responses at a regional scale during this transitional period is limited. Here we provide a novel lipid-based paleohydrological record for this period from the Dajiuhu peat deposit, central China. High water levels and persistent wet conditions during the Younger Dryas (12.5–11.6 ka) and the early Holocene (10.5–9.9 ka) were inferred on the basis of enrichments of sterenes, a group of unstable intermediate diagenetic products derived from biogenic sterols that are most likely preserved under a waterlogged peatland surface. These two wet intervals were accompanied by temperature decreases indicated by an increase in pollen abundance from cold favoring conifer trees and a decrease in total hardwood tree pollen. This cold and wet climate pattern, which is different from the concordant cold-dry pattern documented in north China, was probably caused by the regional influence of the western Pacific subtropical high on the residence time of the Meiyu rainband in the middle and lower reaches of the Yangtze River Valley.

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Short-chain A-ring methylated steroidal hydrocarbons

Killops,

Abbott,

Peakman

2023

Chemical Geology

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Hydroxy and ketonic androstanes: a new class of sterol diagenetic product in peat

Cited by 10 publications

References 12 publications

Bioconversion of coal to methane by microbial communities from soil and from an opencast mine in the Xilingol grassland of northeast China

Bioconversion of coal to methane by microbial communities from soil and from an opencast mine in the Xilingol grassland of northeast China

Moisture conditions during the Younger Dryas and the early Holocene in the middle reaches of the Yangtze River, central China

Short-chain A-ring methylated steroidal hydrocarbons

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