3 documents found, page 1 of 1
Effect of nickel and cobalt on methanogenic enrichment cultures and role of bio...
Paulo, Lara M.; Ramiro-Garcia, Javier; van Mourik, Simon; Stams, Alfons Johannes Maria; Sousa, Diana Zita MachadoMetals play an important role in microbial metabolism by acting as cofactors for many enzymes. Supplementation of biological processes with metals may result in improved performance, but high metal concentrations are often toxic to microorganisms. In this work, methanogenic enrichment cultures growing on H2/CO2 or acetate were supplemented with trace concentrations of nickel (Ni) and cobalt (Co), but no signifi...
Geochemical and microbial community determinants of reductive dechlorination at...
Atashgahi, Siavash; Lu, Yue; Zheng, Ying; Saccenti, Edoardo; Suarez-Diez, Maria; Ramiro-Garcia, Javier; Eisenmann, Heinrich; Elsner, MartinBiostimulation is widely used to enhance reductive dechlorination of chlorinated ethenes in contaminated aquifers. However, the knowledge on corresponding biogeochemical responses is limited. In this study glycerol was injected in an aquifer contaminated with cis-dichloroethene (cDCE), and geochemical and microbial shifts were followed for 265 days. Consistent with anoxic conditions and sulfate reduction after ...
Growth and activity of ANME clades with different sulfate and sulfide concentra...
Timmers, Peer H. A.; Widjaja-Greefkes, H. C. Aura; Ramiro-Garcia, Javier; Plugge, C. M.; Stams, Alfons Johannes MariaExtensive geochemical data showed that significant methane oxidation activity exists in marine sediments. The organisms responsible for this activity are anaerobic methane-oxidizing archaea (ANME) that occur in consortia with sulfate-reducing bacteria. A distinct zonation of different clades of ANME (ANME-1, ANME-2a/b and ANME-2c) exists in marine sediments, which could be related to the localized concentration...