Morphology and wall ultrastructure of leiosphaeric and acanthomorphic acritarchs from the Ediacaran of Australia [0.03%]
澳大利亚埃迪卡拉纪光滑球粒状和棘刺球粒状原核的形态及壁超微结构
S Willman
S Willman
Acritarchs are a group of organic-walled microfossils with unknown biological affinities. The wall ultrastructure of the unornamented, smooth Leiosphaeridia sp. and the acanthomorphic Gyalosphaeridium pulchrum from the Ediacaran Dey Dey Mud...
N J Butterfield
N J Butterfield
DNA perseverance of microorganisms exposed to silica: an experimental study [0.03%]
暴露于二氧化硅的微生物的DNA耐受性：一项实验研究
R T Schelble,J A Hall,K H Nealson et al.
R T Schelble et al.
The persistence of DNA from microorganisms exposed to various concentrations of SiO2 (ranging from 0 to 3000 p.p.m.) was monitored over time. The impact of silica mineralization or silicification on the longevity of 16S rRNA and 16 s rDNA g...
Dominique J Tobler,Andri Stefánsson,Liane G Benning
Dominique J Tobler
Field in-situ sinter growth studies have been carried out in five geochemically very different Icelandic geothermal areas with the aim to quantify the effects of water chemistry, (e.g. silica content (250 to 695 p.p.m. SiO(2)), salinity (me...
A high-resolution chemical and structural study of framboidal pyrite formed within a low-temperature bacterial biofilm [0.03%]
低温细菌生物被膜内帧状黄铁矿的化学和结构研究
L C W MacLean,T Tyliszczak,P U P A Gilbert et al.
L C W MacLean et al.
A novel, anaerobically grown microbial biofilm, scraped from the inner surface of a borehole, 1474 m below land surface within a South African, Witwatersrand gold mine, contains framboidal pyrite. Water flowing from the borehole had a tempe...
Microbial thiosulphate reaction arrays: the interactive roles of Fe(III), O2 and microbial strain on disproportionation and oxidation pathways [0.03%]
硫代硫酸盐反应阵列：Fe(III)、O₂和微生物菌株对分解和氧化路径的交互作用
L A Warren,K L I Norlund,L Bernier
L A Warren
In this work, we experimentally evaluate pH and SO4(2-) dynamics associated with abiotic and microbial S2O3(2-) oxidation under varying [O2], [Fe(III)] and microbial strain/consortia (two pure strains, Acidithiobacillus ferrooxidans, Acidit...
Characterization of methanogenic and prokaryotic assemblages based on mcrA and 16S rRNA gene diversity in sediments of the Kazan mud volcano (Mediterranean Sea) [0.03%]
基于甲烷基因多样性对卡赞泥火山沉积物中产甲烷菌和原核生物群落的研究（地中海）
K A Kormas,A Meziti,A Dählmann et al.
K A Kormas et al.
The diversity of the methyl-coenzyme reductase A (mcrA) and 16S rRNA genes was investigated in gas hydrate containing sediment from the Kazan mud volcano, eastern Mediterranean Sea. mcrA was detected only at 15 and 20 cm below seafloor (cmb...
Geobiology--quo vadis? [0.03%]
古生物学何去何从？
L Kump
L Kump
Sulphur isotopes and the search for life: strategies for identifying sulphur metabolisms in the rock record and beyond [0.03%]
硫同位素与寻找生命的策略：在岩石记录及其他领域中识别硫代谢的方法
D T Johnston,J Farquhar,K S Habicht et al.
D T Johnston et al.
The search for life can only be as successful as our understanding of the tools we use to search for it. Here we present new sulphur isotope data (32S, 33S, 34S, 36S) from a variety of modern marine environments and use these observations, ...
A thermodynamic analysis of the anaerobic oxidation of methane in marine sediments [0.03%]
海洋沉积物中甲烷厌氧氧化的热力学分析
D E Larowe,A W Dale,P Regnier
D E Larowe
Anaerobic oxidation of methane (AOM) in anoxic marine sediments is a significant process in the global methane cycle, yet little is known about the role of bulk composition, temperature and pressure on the overall energetics of this process...