424 Manuscript received: July 11, 2007; final revision received: November 21, 2007; accepted: November 25, 2007. Author’s Note: This material is based on work supported by the National Science Foundation under Grant No. 0431373. The author would like to thank Kim Fortun, Ken Fleischmann, two anonymous reviewers, and the editor for their constructive comments on earlier versions of this manuscri...

Ji-Young Jang, M.D., Mi-Ryeong Ryu, M.D., Sung-Whan Kim, M.D., Chul-Seung Kay, M.D., Yeon-Sil Kim, M.D., Yoon-Kyeong Oh, M.D., Hyung-Chul Kwon, M.D., Sei-Chul Yoon, M.D., Woo-Chan Park, M.D., Byung-Joo Song, M.D., Se-Jeong Oh, M.D., Sang-Seol Jung, M.D., Jong-Man Won, M.D., Seung-Nam Kim, M.D. and Su-Mi Chung, M.D. Department of Radiation Oncology, Chosun University Hospital, Gwangju, Departmen...

Twenty-five yellow chromogenic strains isolated from hospital tap water samples collected nationwide were identified by partial 16S rDNA sequencing. In addition, the chlorine resistance of the isolates was experimentally investigated. The results showed that of the strains tested, 12 strains (48.0%) were Sphingomonas ursincola/natatoria, which was most frequently identified, followed by 2 strai...

Ectoine and hydroxyectoine are well-recognized members of the compatible solutes and are widely employed by microorganisms as osmostress protectants. The EctABC enzymes catalyze the synthesis of ectoine from the precursor L-aspartate-β-semialdehyde. A subgroup of the ectoine producers can convert ectoine into 5-hydroxyectoine through a region-selective and stereospecific hydroxylation reaction....

Sphingomonads comprise a physiologically versatile group within the Alphaproteobacteria that includes strains of interest for biotechnology, human health, and environmental nutrient cycling. In this study, we compared 26 sphingomonad genome sequences to gain insight into their ecology, metabolic versatility, and environmental adaptations. Our multilocus phylogenetic and average amino acid ident...

Antimony (Sb) and copper (Cu) are toxic heavy metals that are associated with a wide variety of minerals. Sb(III)-oxidizing bacteria that convert the toxic Sb(III) to the less toxic Sb(V) are potentially useful for environmental Sb bioremediation. A total of 125 culturable Sb(III)/Cu(II)-resistant bacteria from 11 different types of mining soils were isolated. Four strains identified as Arthrob...

We propose a new algorithm for the max-flow problem. It consists of a sequence of augmentations along paths constructed by an auction-like algorithm. These paths are not necessarily shortest, that is, they need not contain a minimum number of arcs. However, they typically can be found with much less computation than the shortest augmenting paths used by competing methods. Our algorithm outperfo...