97 research outputs found
Draft genome sequence of Kocuria sp. strain UCD-OTCP (phylum Actinobacteria)
© 2013 Coil et al. Here, we present the draft genome of Kocuria sp. strain UCD-OTCP, a member of the phylum Actinobacteria, isolated from a restaurant chair cushion. The assembly contains 3,791,485 bp (G+C content of 73%) and is contained in 68 scaffolds
Draft genome sequence of an actinobacterium, Brachybacterium muris strain UCD-AY4
© 2013 Lo et al. Here we present the draft genome of an actinobacterium, Brachybacterium muris UCD-AY4. The assembly contains 3,257,338 bp and has a GC content of 70%. This strain was isolated from a residential bath towel and has a 16S rRNA gene 99.7% identical to that of the original B. muris strain, C3H-21
Draft genome sequence of Curtobacterium flaccumfaciens strain UCD-AKU (phylum Actinobacteria)
© 2013 Flanagan et al. Here we present the draft genome of an actinobacterium, Curtobacterium flaccumfaciens strain UCD-AKU, isolated from a residential carpet. The genome assembly contains 3,692,614 bp in 130 contigs. This is the first member of the Curtobacterium genus to be sequenced
Draft genome sequence of Microbacterium sp. strain UCD-TDU (phylum Actinobacteria)
© 2013 Bendiks et al. Here, we present the draft genome sequence of Microbacterium sp. strain UCD-TDU, a member of the phylum Actinobacteria. The assembly contains 3,746,321 bp (in 8 scaffolds). This strain was isolated from a residential toilet as part of an undergraduate student research project to sequence reference genomes of microbes from the built environment
Draft genome sequence of Dietzia sp. strain UCD-THP (phylum Actinobacteria)
© 2013 Diep et al. Here, we present the draft genome sequence of an actinobacterium, Dietzia sp. strain UCD-THP, isolated from a residential toilet handle. The assembly contains 3,915,613 bp. The genome sequences of only two other Dietzia species have been published, those of Dietzia alimentaria and Dietzia cinnamea
Swabs to genomes: A comprehensive workflow
© 2015 Dunitz et al. The sequencing, assembly, and basic analysis of microbial genomes, once a painstaking and expensive undertaking, has become much easier for research labs with access to standard molecular biology and computational tools. However, there are a confusing variety of options available for DNA library preparation and sequencing, and inexperience with bioinformatics can pose a significant barrier to entry for many who may be interested in microbial genomics. The objective of the present study was to design, test, troubleshoot, and publish a simple, comprehensive workflow from the collection of an environmental sample (a swab) to a published microbial genome; empowering even a lab or classroom with limited resources and bioinformatics experience to performit
X-ray selected AGN in groups at redshifts z~1
We explore the role of the group environment in the evolution of AGN at the
redshift interval 0.7<z<1.4, by combining deep Chandra observations with
extensive optical spectroscopy from the All-wavelength Extended Groth strip
International Survey (AEGIS). The sample consists of 3902 optical sources and
71 X-ray AGN. Compared to the overall optically selected galaxy population,
X-ray AGN are more frequently found in groups at the 99% confidence level. This
is partly because AGN are hosted by red luminous galaxies, which are known to
reside, on average, in dense environments. Relative to these sources, the
excess of X-ray AGN in groups is significant at the 91% level only. Restricting
the sample to 0.7<z<0.9 and M_B<-20mag in order to control systematics we find
that X-ray AGN represent (4.7\pm1.6) and (4.5\pm1.0)% of the optical galaxy
population in groups and in the field respectively. These numbers are
consistent with the AGN fraction in low redshift clusters, groups and the
field. The results above, although affected by small number statistics, suggest
that X-ray AGN are spread over a range of environments, from groups to the
field, once the properties of their hosts (e.g. colour, luminosity) are
accounted for. There is also tentative evidence, significant at the 98% level,
that the field produces more X-ray luminous AGN compared to groups, extending
similar results at low redshift to z~1. This trend may be because of either
cold gas availability or the nature of the interactions occurring in the denser
group environment (i.e. prolonged tidal encounters).Comment: To appear in MNRA
The clustering of X-ray selected AGN at z=0.1
The clustering properties of moderate luminosity () X-ray selected AGN at are explored.
X-ray sources in the redshift interval are selected from a
serendipitous XMM survey of the SDSS footprint (XMM/SDSS) and are
cross-correlated with the SDSS Main galaxy sample. The inferred X-ray AGN
auto-correlation function is described by a power law with amplitude
hMpc and slope . The corresponding mass
of the dark matter haloes that host X-ray AGN at is \approx
10^{13} \,h ^{-1} \, M_{\sun}. Comparison with studies at higher redshift
shows that this mass scale is characteristic of moderate luminosity X-ray AGN
out to . Splitting the AGN sample by rest-frame color shows that
X-ray sources in red hosts are more clustered than those associated with blue
galaxies, in agreement with results at . We also find that the host
galaxies of X-ray AGN have lower stellar masses compared to the typical central
galaxy of a \approx 10^{13} \,h ^{-1} \, M_{\sun} dark matter halo. AGN hosts
either have experienced less stellar mass growth compared to the average
central galaxy of a \approx 10^{13} \,h ^{-1} \, M_{\sun} halo or a fraction
of them are associated with satellite galaxies.Comment: MNRAS accepted 14 pages, 8 figures, 5 table
Draft genome sequences of 26 Porphyromonas strains isolated from the canine oral microbiome
� 2015 Coil et al. We present the draft genome sequences for 26 strains of Porphyromonas (P. canoris, P. gulae, P. cangingavalis, P. macacae, and 7 unidentified) and an unidentified member of the Porphyromonadaceae family. All of these strains were isolated from the canine oral cavity, from dogs with and without early periodontal disease
Large Scale Structure of the Universe
Galaxies are not uniformly distributed in space. On large scales the Universe
displays coherent structure, with galaxies residing in groups and clusters on
scales of ~1-3 Mpc/h, which lie at the intersections of long filaments of
galaxies that are >10 Mpc/h in length. Vast regions of relatively empty space,
known as voids, contain very few galaxies and span the volume in between these
structures. This observed large scale structure depends both on cosmological
parameters and on the formation and evolution of galaxies. Using the two-point
correlation function, one can trace the dependence of large scale structure on
galaxy properties such as luminosity, color, stellar mass, and track its
evolution with redshift. Comparison of the observed galaxy clustering
signatures with dark matter simulations allows one to model and understand the
clustering of galaxies and their formation and evolution within their parent
dark matter halos. Clustering measurements can determine the parent dark matter
halo mass of a given galaxy population, connect observed galaxy populations at
different epochs, and constrain cosmological parameters and galaxy evolution
models. This chapter describes the methods used to measure the two-point
correlation function in both redshift and real space, presents the current
results of how the clustering amplitude depends on various galaxy properties,
and discusses quantitative measurements of the structures of voids and
filaments. The interpretation of these results with current theoretical models
is also presented.Comment: Invited contribution to be published in Vol. 8 of book "Planets,
Stars, and Stellar Systems", Springer, series editor T. D. Oswalt, volume
editor W. C. Keel, v2 includes additional references, updated to match
published versio
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