The genome of the soil-dwelling heterotrophic N2-fixing Gram-negative bacterium Azotobacter chroococcum NCIMB 8003 (ATCC 4412) (Ac-8003) has been determined. It consists of 7 circular replicons totalling 5,192,291 bp comprising a circular chromosome of 4,591,803 bp and six plasmids pAcX50a, b, c, d, e, f of 10,435 bp, 13,852, 62,783, 69,713, 132,724, and 311,724 bp respectively. The chromosome ...

We present a quantitative classification scheme for carbon and oxygen sequence Wolf—Rayet stars. Our scheme uses new high-quality optical AAT and INT observations of 20 stars for which we provide narrow-band photometry and estimates of interstellar reddenings. In increasing order of excitation, our spectral classes range from WC11 to WC4 for Wolf— Rayet stars with a dominant carbon line visual ...

BACKGROUND Identification of high-risk populations for serious infection due to S. pneumoniae will permit appropriately targeted prevention programs. METHODS We conducted prospective, population-based surveillance for invasive pneumococcal disease and laboratory confirmed pneumococcal pneumonia in homeless adults in Toronto, a Canadian city with a total population of 2.5 M, from January 1, 20...

Letter to the Editor Trends in mortality due to myeloid leukemia in regions of Brazil and the country as a whole between 1980 and 2012 Dear Editor, We read with great interest the article entitled " Trends in mortality of adult patients diagnosed with myeloid leukemia from 1994 to 2011 in southeastern Brazil " by Callera et al. published in the Revista Brasileira de Hematologia e Hemoterapia (2...

We present stellar velocity dispersion (σ∗) measurements for a significant sample of 40 broad-line (Type 1) active galaxies for use in testing the well-known relation between black hole mass and stellar velocity dispersion. The objects are selected to contain Ca II triplet, Mg Ib triplet, and Ca H+K stellar absorption features in their optical spectra so that we may use them to perform extensiv...

Bird cherry-oat aphid, (Rhopalosiphum padi /L./ (Hemi-ptera, Aphididae), is a holocyclic host-alternating species in temperate climates between wooden bird cherry, Prunus padus L. (Rosaceae) (winter, primary host) and grasses (summer, secondary hosts). In the spring, the aphid hatches from the winter eggs on P. padus and two wingless generations are developed before appearance of winged spring ...

The genome of the soil-dwelling heterotrophic N2-fixing Gram-negative bacterium Azotobacter chroococcum NCIMB 8003 (ATCC 4412) (Ac-8003) has been determined. It consists of 7 circular replicons totalling 5,192,291 bp comprising a circular chromosome of 4,591,803 bp and six plasmids pAcX50a, b, c, d, e, f of 10,435 bp, 13,852, 62,783, 69,713, 132,724, and 311,724 bp respectively. The chromosome ...