, 2011); in pure culture, it was shown to degrade 50% of 34 μM RDX within 7 days as a sole source of nitrogen, but was incapable of TNT or HMX degradation, despite previous research showing that the genus Prevotella increased
significantly during an 8-h HMX AZD4547 solubility dmso incubation in WRF (Perumbakkam & Craig, 2012). Removal of TNT and all metabolites (< 5% of original TNT recovered as a metabolite) occurred for Butyrivibrio fibriosolvens, Fibrobacter succinogenes, Lactobacillus vitulinus, Selenomonas ruminantium, Streptococcus caprinus, and Succinovibrio dextrinosolvens (De Lorme & Craig, 2009). Anaerovibrio lipolyticus and Desulfovibrio desulfuricans were inhibited by TNT (De Lorme see more & Craig, 2009) and HMX (this study), but not by RDX (Eaton et al., 2013). Streptococcus caprinus and the Clostridia organisms have
shown a strong degradative ability for TNT and RDX, but not HMX (Zhao et al., 2003; De Lorme & Craig, 2009). Lactobacillus vitulinus tends to favor TNT over RDX, although it can degrade both (De Lorme & Craig, 2009; Eaton et al., 2013), while L. ruminus has not been found to be capable of degrading any energetic compound. The general trend we have observed is that microorganisms from the rumen, while sometimes capable as individual strains/isolates, excel as a community in the bioremediation of explosives. Phytoruminal bioremediation is a technique that is proving to be viable for the remediation of energetic compounds, which includes TNT (Fleischmann et al., 2004; Smith et al., 2008; De Lorme & Craig, 2009), RDX (Eaton et al., 2011, 2013), and now HMX (Perumbakkam & Craig, 2012). The authors would like to thank Michael Wiens for technical assistance. This research was supported in part by a gift from Ruminant Solutions, UC (New Mexico), the Oregon Agricultural Experiment Station (project ORE00871) and the USDA, Agriculture
Research Service (project 50-1265-6-076). Any opinions, findings, conclusions, or recommendations expressed in this publication are those of the author(s) and do not necessarily reflect the view of the U.S. Department of Agriculture. The authors have no conflict of interests to declare. “
“Human-β-defensins 1-3 (HBD-1-3) and their C-terminal analogs Phd-1-3 do not show antibacterial activity learn more against Escherichia coli in the presence of mono- and divalent cations. Activity of peptides was examined against E. coli pretreated with carbonyl cyanide m-chlorophenylhydrazone (CCCP) and salt remedial Escherichia coli ftsEX, a deletion mutant of FtsEX complex [an ATP-binding cassette (ABC) transporter protein], in the presence of Na+, Ca2+, and Mg2+. Activity was observed in the presence of Na+ and Ca2+, although not in the presence of Mg2+ against E. coli, when proton motive force (PMF) was dissipated by CCCP. The peptides exhibited antibacterial activity against E.