We report results from a systematic search for X-ray flares from Mrk 421, using archival data from the Rossi X-Ray Timing Explorer (RXTE) satellite. The flares are clearly seen over a wide range of timescales. The quasicontinuous coverage of the source with the All-SkyMonitor (ASM) reveals frequent occurrence of major flares that last for months. On a few occasions, the source was intensively m...

The combination of microbial reduction and further microbial oxidation of iron was applied to the treatment of food-processing wastewater and recovery of ammonium. Fe2+ ions were formed by ironreducing bacteria under anaerobic conditions. Ammonium was recovered by co-precipitation with negatively charged iron hydroxides produced during oxidation of Fe2+ by iron-oxidizing bacteria under microaer...

Natively unfolded proteins range from molten globules to disordered coils. They are abundant in eukaryotic genomes and commonly involved in molecular interactions. The essential N-terminal translocation domains of colicin toxins from Escherichia coli are disordered bacterial proteins that bind at least one protein of the Tol or Ton family. The colicin N translocation domain (ColN-(1-90)), which...

Address correspondence to: Lubomir Tomaska, Department of Genetics, Comenius University, Faculty of Natural Sciences, Mlynska dolina B-1, 842 15 Bratislava, Slovak republic Tel: +421 2 60296 433, Fax: +421 2 60296 434, E-mail: [email protected] Jack D. Griffith, Lineberger Comprehensive Cancer Center, University of North Carolina Mason Farm Road CB7095, Chapel Hill NC 27599-7295, USA Tel: +9...