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  • N-dimensional Friedmann-Robertson-Walker cosmologies 
    Garcia A.A.; Garcia-Quiroz A.; Cataldo M.; Del Campo S. (2014-04-04)
    In the framework of the n-dimensional Friedmann-Robertson-Walker cosmology, defined for a single scalar field minimally coupled to gravity in the presence of a perfect fluid, the n-dimensional spatially flat Lucchin-Mataresse, ...
  • Naked singularities, topological defects and brane couplings 
    Edelstein J.D.; Garbarz A.; Miskovic O.; Zanelli J. (2014-04-04)
    A conical defect in 2 + 1 anti-de Sitter space is a BTZ solution with a negative mass parameter. This is a naked singularity, but a rather harmless one: it is a point particle. Naturally, the energy density and the spacetime ...
  • Nanostructure in a Ti alloy processed using a cryomilling technique 
    Sun F.; Rojas P.; Zuniga A.; Lavernia E.J. (2014-04-04)
    A nanocrystalline Ti alloy with a uniform distribution of grains was synthesized using cryogenic mechanical milling. The effects of cryomilling parameters, such as milling time and ball to powder ratio (BPR), on the particle ...
  • Nao me pergunte 
    Jose Maria de Abreu; Jair Amorim (Continental, 2011-11-07)
  • Naranjos en flor 
    Armando Carrera (RCA VICTOR, 2011-11-07)
  • Narcissus 
    E. Nevin (Casa Amarilla, 2014-03-27)
  • Narratology in the hybrid novel No será la Tierra by Jorge Volpi 
    Roberto Angel G. (2014-04-04)
    This text makes a narrative study of the novel by Jorge Volpi No será la Tierra.We analyze the contradictory structure of the book, the multiple frames, the polyphonic narrator, the post-apocalyptic time, the antiutopic ...
  • Natalia 
    E. J. Hermosillas (Mattensohn & Grimm, 2014-03-27)
  • National qualification systems integration using ontologies 
    Cubillos C.; Lamberti F.; Demartini C. (2014-04-04)
    This work presents the use of ontologies as a way to tackle the problem of integration of qualification systems in order to enable the transparency and mobility of students at European level. For this, qualification systems ...
  • Natural iron enrichment around the Antarctic Peninsula in the Southern Ocean 
    Ardelan M.V.; Holm-Hansen O.; Hewes C.D.; Reiss C.S.; Silva N.S.; Dulaiova H.; Steinnes E.; Sakshaug E. (2014-04-04)
    As part of the US-AMLR program in January-February of 2006, 99 stations in the South Shetland Islands-Antarctic Peninsula region were sampled to understand the variability in hydrographic and biological properties related ...
  • Natural lysogenization and transduction in Salmonella enterica serovar Choleraesuis by bacteriophage P1 
    Leon M.; Santander J.; Curtiss R.; Robeson J. (2014-04-04)
    It has been reported that bacteriophage P1 injects DNA into serovar Choleraesuis without evidence of productive infection. However, we found that P1 generates progeny and is capable of transduction in serovar Choleraesuis. ...
  • A natural peptide and its variants derived from the processing of infectious pancreatic necrosis virus (IPNV) displaying enhanced antimicrobial activity: A novel alternative for the control of bacterial diseases 
    Jofre C.; Guzman F.; Cardenas C.; Albericio F.; Marshall S.H. (2014-04-04)
    The larger segment of the infectious pancreatic necrosis virus (IPNV) codifies most of the structural and non-structural proteins of the virus in two overlapping open reading frames (ORFs). The longer of the two ORF is ...
  • Natural zinc enrichment in peatlands: Biogeochemistry of ZnS formation 
    Yoon S.-J.; Yanez C.; Bruns M.A.; Martinez-Villegas N.; Martinez C.E. (2014-04-04)
    Peatlands effectively retain heavy metals and prevent stream and watershed contamination. Sulfate reduction is considered the most significant process of metal immobilization in natural wetlands and microbial sulfate ...
  • Nature boy 
    Cole Porter; Carlos Ulloa (Odeon, 2011-11-07)
  • A near-infrared catalogue of the Galactic novae in the VVV survey area 
    Saito R.K.; Minniti D.; Angeloni R.; Catelan M.; Beamin J.C.; Borissova J.; Dekany I.; Kerins E.; Kurtev R.; Mennickent R.E. (2014-04-04)
    Context. Near-infrared data on classical novae contain useful information about the ejected gas mass and the thermal emission by dust formed during eruption, and provide independent methods to classify the objects according ...
  • Near-infrared imaging polarimetry of HD 142527 
    Canovas H.; Menard F.; Hales A.; Jordan A.; Schreiber M.R.; Casassus S.; Gledhill T.M.; Pinte C. (2014-04-04)
    Context. HD 142527 is a pre-transition disk with strong evidence for ongoing planet formation. Recent observations show a disrupted disk with spiral arms, a dust-depleted inner cavity and the possible presence of gas streams ...
  • The Necklace: Equatorial and polar outflows from the binary central star of the new planetary nebula IPHASXJ194359.5+170901 
    Corradi R.L.M.; Sabin L.; Miszalski B.; Rodriguez-Gil P.; Santander-Garcia M.; Jones D.; Drew J.E.; Mampaso A.; Barlow M.J.; Rubio-Diez M.M.; Casares J.; Viironen K.; Frew D.J.; Giammanco C.; Greimel R.; Sale S.E. (2014-04-04)
    IPHASXJ194359.5+170901 is a new high-excitation planetary nebula with remarkable characteristics. It consists of a knotty ring expanding at a speed of 28 km s-1, and a fast collimated outflow in the form of faint lobes and ...
  • Negative spectrum of the 2+1 black hole 
    Miskovic O.; Zanelli J. (2014-04-04)
    In (2+1)-dimensional gravity with negative cosmological constant, the states in the negative energy range, between anti-de Sitter (AdS) (M=-1) and the so-called Bañados-Teitelboim-Zanelli black hole (M≥0), correspond to ...
  • Negra 
    Virgilio G. Varona (Casa Wagner, 1933)
  • Negra mala 
    Pilar Arcos (Columbia, 2011-11-07)