The complete mitochondrial genome of the yellow coaster, Acraea issoria (Lepidoptera: Nymphalidae: Heliconiinae: Acraeini): sequence, gene organization and a unique tRNA translocation event

In this paper, the complete mitochondrial genome of Acraea issoria (Lepidoptera: Nymphalidae: Heliconiinae: Acraeini) is reported; a circular molecule of 15,245 bp in size. For A. issoria, genes are arranged in the same order and orientation as the complete sequenced mitochondrial genomes of the other lepidopteran species, except for the presence of an extra copy of tRNAIle(AUR)b in the control region. All protein-coding genes of A. issoria mitogenome start with a typical ATN codon and terminate in the common stop codon TAA, except that COI gene uses TTG as its initial codon and terminates in a single T residue. All tRNA genes possess the typical clover leaf secondary structure except for tRNASer(AGN), which has a simple loop with the absence of the DHU stem. The sequence, organization and other features including nucleotide composition and codon usage of this mitochondrial genome were also reported and compared with those of other sequenced lepidopterans mitochondrial genomes. There are some short microsatellite-like repeat regions (e.g., (TA)9, polyA and polyT) scattered in the control region, however, the conspicuous macro-repeats units commonly found in other insect species are absent.

The complete mitochondrial genome of Spilonota lechriaspis Meyrick (Lepidoptera: Tortricidae)

We determined the nucleotide sequence of the mitochondrial genome (mtgenome) of Spilonota lechriaspis Meyrick (Lepidoptera: Tortricidae). The entire closed circular molecule is 15,368 bp and contains 37 genes with the typical gene complement and order for lepidopteran mtgenomes. All tRNAs except tRNASer(AGN) can be folded into the typical cloverleaf secondary structures. The protein-coding genes (PCGs) have typical mitochondrial start codons, with the exception of COI, which uses the unusual CGA one as is found in all other Lepidoptera sequenced to date. In addition, six of 13 PCGs harbor the incomplete termination codons, a single T. The A+T-rich region contains some conserved structures that are similar to those found in other lepidopteran mtgenomes, including a structure combining the motif 'ATAGA', a 19-bp poly(T) stretch and three microsatellite (AT)n elements which are part of larger 122+ bp macrorepeats. This is the first report of macrorepeats in a lepidopteran mtgenome.

A comparative analysis of Mitochondrial genomes in Coleoptera (Arthropoda: Insecta) and genome descriptions of six new beetles

Coleoptera is the most diverse group of insects with over 360,000 described species divided into four suborders: Adephaga, Archostemata, Myxophaga, and Polyphaga. In this study, we present six new complete mitochondrial genome (mtgenome) descriptions, including a representative of each suborder, and analyze the evolution of mtgenomes from a comparative framework using all available coleopteran mtgenomes. We propose a modification of atypical cox1 start codons based on sequence alignment to better reflect the conservation observed across species as well as findings of TTG start codons in other genes. We also analyze tRNA-Ser(AGN) anticodons, usually GCU in arthropods, and report a conserved UCU anticodon as a possible synapomorphy across Polyphaga. We further analyze the secondary structure of tRNA-Ser(AGN) and present a consensus structure and an updated covariance model that allows tRNAscan-SE (via the COVE software package) to locate and fold these atypical tRNAs with much greater consistency. We also report secondary structure predictions for both rRNA genes based on conserved stems. All six species of beetle have the same gene order as the ancestral insect. We report noncoding DNA regions, including a small gap region of about 20 bp between tRNA-Ser(UCN) and nad1 that is present in all six genomes, and present results of a base composition analysis.

Starburst in the ultraluminous galaxy Arp 220: Constraints from observations of radio recombination lines and continuum

We present observations of radio recombination lines (RRL) from the starburst galaxy Arp 220 at 8.1 GHz (H92 alpha) and 1.4 GHz (H167 alpha and H165 alpha) and at 84 GHz (H42 alpha), 96 GHz (H40 alpha) and 207 GHz (H31 alpha) using the Very Large Array and the IRAM 30 m telescope, respectively. RRLs were detected at all the frequencies except 1.4 GHz, where a sensitive upper limit was obtained. We also present continuum flux measurements at these frequencies as well as at 327 MHz made with the VLA. The continuum spectrum, which has a spectral index alpha similar to -0.6 (S-nu proportional to nu(alpha)) between 5 and 10 GHz, shows a break near 1.5 GHz, a prominent turnover below 500 MHz, and a flatter spectral index above 50 GHz. We show that a model with three components of ionized gas with different densities and area covering factors can consistently explain both RRL and continuum data. The total mass of ionized gas in the three components is 3.2 x 10(7) M., requiring 3 x 10(5) O5 stars with a total Lyman continuum production rate N-Lyc similar to 1.3 x 10(55) photons s(-1). The ratio of the expected to observed Br alpha and Br gamma fluxes implies a dust extinction A(V) similar to 45 mag. The derived Lyman continuum photon production rate implies a continuous star formation rate (SFR) averaged over the lifetime of OB stars of similar to 240 M yr(-1). The Lyman continuum photon Production rate of similar to 3% associated with the high-density H II regions implies a similar SFR at recent epochs (t < 10(5) yr). An alternative model of high-density gas, which cannot be excluded on the basis of the available data, predicts 10 times higher SFR at recent epochs. If confirmed, this model implies that star formation in Arp 220 consists of multiple starbursts of very high SFR (few times 10(3) M. yr(-1)) and short duration (similar to 10(5) yr). The similarity of IR excess, L-IR/L-Ly alpha similar to 24, in Arp 220 to values observed in starburst galaxies shows that most of the high luminosity of Arp 220 is due to the ongoing starburst rather than to a hidden active galactic nucleus (AGN). A comparison of the IR excesses in Arp 220, the Galaxy, and M33 indicates that the starburst in Arp 220 has an initial mass function that is similar to that in normal galaxies and has a duration longer than 107 yr. If there was no infall of gas during this period, then the star formation efficiency (SFE) in Arp 220 is similar to 50%. The high SFR and SFE in Arp 220 is consistent with their known dependences on mass and density of gas in star-forming regions of normal galaxies.

The modulation of radiation in an electron-positron plasma

The modulational instability of a large-amplitude, linearly polarized electromagnetic wave propagating in an electron-positron plasma is considered, including the combined effect of relativistic mass variation of the plasma particles, harmonic generation, and the non-resonant, finite-frequency electrostatic density perturbations, all caused by the large-amplitude radiation field. The radiation from many strong sources, such as AGN and pulsars, has been observed to vary over a host of time-scales. It is possible that the extremely rapid variations in the non-thermal continuum of AGN, as well as in the non-thermal radio radiation from pulsars, can be accounted for by the modulational instabilities to which radiation may be subjected during its propagation out of the emission region.

Very large array detection of radio recombination lines from the radio nucleus of NGC 253: Ionization by a weak active galactic nucleus, an obscured super star cluster, or a compact supernova remnant?

We have imaged the H92alpha and H75alpha radio recombination line (RRL) emissions from the starburst galaxy NGC 253 with a resolution of similar to4 pc. The peak of the RRL emission at both frequencies coincides with the unresolved radio nucleus. Both lines observed toward the nucleus are extremely wide, with FWHMs of similar to200 km s(-1). Modeling the RRL and radio continuum data for the radio nucleus shows that the lines arise in gas whose density is similar to10(4) cm(-3) and mass is a few thousand M., which requires an ionizing flux of (6-20) x 10(51) photons s(-1). We consider a supernova remnant (SNR) expanding in a dense medium, a star cluster, and also an active galactic nucleus (AGN) as potential ionizing sources. Based on dynamical arguments, we rule out an SNR as a viable ionizing source. A star cluster model is considered, and the dynamics of the ionized gas in a stellar-wind driven structure are investigated. Such a model is only consistent with the properties of the ionized gas for a cluster younger than similar to10(5) yr. The existence of such a young cluster at the nucleus seems improbable. The third model assumes the ionizing source to be an AGN at the nucleus. In this model, it is shown that the observed X-ray flux is too weak to account for the required ionizing photon flux. However, the ionization requirement can be explained if the accretion disk is assumed to have a big blue bump in its spectrum. Hence, we favor an AGN at the nucleus as the source responsible for ionizing the observed RRLs. A hybrid model consisting of an inner advection-dominated accretion flow disk and an outer thin disk is suggested, which could explain the radio, UV, and X-ray luminosities of the nucleus.

Isotropic heating of galaxy cluster cores via rapidly reorienting active galactic nucleus jets

Active galactic nucleus (AGN) jets carry more than sufficient energy to stave off catastrophic cooling of the intracluster medium (ICM) in the cores of cool-core clusters. However, in order to prevent catastrophic cooling, the ICM must be heated in a near-isotropic fashion and narrow bipolar jets with P-jet = 10(44-45) erg s(-1), typical of radio AGNs at cluster centers, are inefficient in heating the gas in the transverse direction to the jets. We argue that due to existent conditions in cluster cores, the supermassive black holes (SMBHs) will, in addition to accreting gas via radiatively inefficient flows, experience short stochastic episodes of enhanced accretion via thin disks. In general, the orientation of these accretion disks will be misaligned with the spin axis of the black holes (BHs) and the ensuing torques will cause the BH's spin axis (and therefore the jet axis) to slew and rapidly change direction. This model not only explains recent observations showing successive generations of jet-lobes-bubbles in individual cool-core clusters that are offset from each other in the angular direction with respect to the cluster center, but also shows that AGN jets can heat the cluster core nearly isotropically on the gas cooling timescale. Our model does require that the SMBHs at the centers of cool-core clusters be spinning relatively slowly. Torques from individual misaligned disks are ineffective at tilting rapidly spinning BHs by more than a few degrees. Additionally, since SMBHs that host thin accretion disks will manifest as quasars, we predict that roughly 1-2 rich clusters within z < 0.5 should have quasars at their centers.

Turbulence and cooling in galaxy cluster cores

We study the interplay between turbulent heating, mixing, and radiative cooling in an idealized model of cool cluster cores. Active galactic nuclei (AGN) jets are expected to drive turbulence and heat cluster cores. Cooling of the intracluster medium (ICM) and stirring by AGN jets are tightly coupled in a feedback loop. We impose the feedback loop by balancing radiative cooling with turbulent heating. In addition to heating the plasma, turbulence also mixes it, suppressing the formation of cold gas at small scales. In this regard, the effect of turbulence is analogous to thermal conduction. For uniform plasma in thermal balance (turbulent heating balancing radiative cooling), cold gas condenses only if the cooling time is shorter than the mixing time. This condition requires the turbulent kinetic energy to be a parts per thousand(3) the plasma internal energy; such high velocities in cool cores are ruled out by observations. The results with realistic magnetic fields and thermal conduction are qualitatively similar to the hydrodynamic simulations. Simulations where the runaway cooling of the cool core is prevented due to mixing with the hot ICM show cold gas even with subsonic turbulence, consistent with observations. Thus, turbulent mixing is the likely mechanism via which AGN jets heat cluster cores. The thermal instability growth rates observed in simulations with turbulence are consistent with the local thermal instability interpretation of cold gas in cluster cores.

Raíces ideológicas de la perspectiva de género

Resumen: El feminismo radical o de género tiene sus orígenes históricos, su matriz ideológica y su modo dialéctico de entender la relación varón-mujer, en el pensamiento marxista (Engels, de Beauvoir, Firestone). La “antítesis” de esta lucha de sexos es la revolución feminista radical, y su principal instrumento revolucionario y de penetración cultural es la ideología de género. La fase central de esta revolución es el apoderamiento, por parte de las mujeres, de los medios de reproducción. Los medios que han demostrado ser más aptos para lograr la victoria son el aborto por decisión privativa de la mujer, la fecundación artificial y el matrimonio entre personas del mismo sexo. La revolución se libra en el campo cultural y, luego, en el jurídico.

Sapientia, 1963, Vol. XVIII, nº 69-70 (número completo)

Contenido: Materialismo dialéctico y totalitarismo / Octavio N. Derisi – Luis Lavelle / Regis Jolivet – La continuidad entre la dogmática jurídica, la teoría general y la filosofía del derecho / Avelino M. Quintas – Lógica y logística / Carlos A. Lungarzo Melcon – La ética existencialista y marxista / Octavio N. Derisi – Ontología del arte moderno / Ángel T. Lo Celso – Notas y comentarios -- Bibliografía

El clero argentino durante la Revolución (1810- 1816) según las oraciones patrióticas : análisis de los casos de: Diego Zabaleta, Gregorio Funes, Francisco de Paula Castañeda y Pedro de Castro Barros

Resumen: El presente trabajo es un análisis individual de cada Oración Patriótica enunciada en el título. En cada una de ellas se destaca, como eje de estudio, el lenguaje utilizado y el orden dialéctico que cada personaje propone. El tiempo histórico en que cada uno de los discursos fue pronunciado es también analizado como relación directa a la naturaleza del mensaje. Se busca remarcar además la preeminencia que tuvo el clero criollo como uno de los actores sociales fundamentales del proceso revolucionario.

Lurking in ULIRGs: Molecular Gas in local Merging Galaxies

Mergers and interacting galaxies are pivotal to the evolution of galaxies in the universe. They are the sites of prodigious star formation and key to understanding the starburst processes: the physical and chemical properties and the dynamics of the molecular gas. ULIRGs or Ultraluminous Infrared Galaxies are a result of many of these mergers. They host extreme starbursts, AGNs, and mergers. They are the perfect laboratory to probe the connection between starbursts, black hole accretion and mergers and to further our understanding of star formation and merging.

NGC 6240 and Arp 220 can be considered the founding members of this very active class of objects. They are in different stages of merging and hence are excellent case studies to further our understanding about the merging process. We have imaged the dense star-forming regions of these galaxies at sub-arcsec resolution with CARMA C and B Configurations (2" and 0.5 - 0.8"). Multi-band imaging allows excitation analysis of HCN, HCO⁺, HNC, and CS along with CO transitions to constrain the properties of the gas. Our dataset is unique in that we have observed these lines at similar resolutions and high sensitivity which can be used to derive line ratios of faint high excitation lines.

Arp 220 has not had confirmed X-ray AGN detections for either nuclei. However, our observations indicate HCN/HNC ratios consistent with the chemistry of X-ray Dominated Regions (XDRs) -- a likely symptom of AGN. We calculated the molecular Hydrogen densities using each of the molecular species and conclude that assuming abundances of HNC and HCO⁺ similar to those in galactic sources are incorrect in the case of ULIRGs. The physical conditions in the dense molecular gas in ULIRGs alter these abundances. The derived H2 volume densities are ~ 5 x 10⁴ cm^-3 in both Arp 220 nuclei and ~ 10⁴ cm^-3 in NGC 6240.

Recorrido y reflexiones en torno al pensamiento analítico de Georges Laplace: movimiento, interdependencia y arquetipos en la construcción de una arqueología científica

Homenaje a Georges Laplace, realizado en Vitoria-Gasteiz el 13,14 y 15 de noviembre de 2012. Edición a cargo de Aitor Calvo, Aitor Sánchez, Maite García-Rojas y Mónica Alonso-Eguíluz.

Naceu lá na serra uma linda flor: a fundação do Império Serrano (1947-1952)

As escolas de samba no Rio de Janeiro se constituíram como espaços privilegiados para atuação política dos moradores das comunidades e assim extrapolaram sua função primeira de promover o lazer para o carnaval em direção à visibilidade das comunidades a elas ligadas. Neste contexto, enfocam-se o Morro da Serrinha e a fundação da Escola de Samba Império Serrano, em uma ação que remonta as redes de relações sociais baseadas em laços familiares. a memória da história da escola vincula-se à memória das famílias locais, elementos centrais de produção e reprodução de um discurso legitimador para a agremiação na região. Através de uma espécie de discurso vencedor, desde os motivos para a fundação de uma nova escola para a região até os carnavais vencedores, a identidade local foi estabelecida em um movimento dialético, pois o lugar passou a ser identificado pela escola de samba, e esta e seus moradores pelo lugar. Assim foi possível identificar na rede familiar do Morro da Serrinha projetos próprios que, através da escola de samba, transpuseram barreiras sociais e angariaram benefícios para a região.

As contradições históricas dos movimentos operários: a complexa organização política pela emancipação humana

Esta pesquisa intitulada: AS CONTRADIÇÕES HISTÓRICAS DOS MOVIMENTOS OPERÁRIOS: A Complexa Organização Política Pela Emancipação Humana foi motivada pelas relações econômicas, políticas e sociais vivenciadas em meus primeiros anos como trabalhador assalariado nas obras de construção civil em cidades do Estado Paraná, em Curitiba: nas barragens de Salto Santiago, em Laranjeira do Sul e Itaipu Binacional, em Foz do Iguaçu. Essas relações impulsionaram inquietações no que tange às contradições na vida do trabalhador como verdadeiro produtor da existência humana. Trata-se de observações que proporcionaram mudanças de rumo na vida e o reingresso aos estudos da educação básica, até chegar à filosofia, motivado pela empiria da exploração do trabalho, o encantamento com a filosofia marxista e, necessariamente conhecendo a filosofia revisionista, anarquista e social democrata, como contradição ao materialismo histórico e dialético. O primeiro momento da militância está relacionado ao convívio com o desemprego e as constantes interrogações sobre a estrutura da sociedade do modo de produção e uma constante interrogação de Que fazer para sair daquelas condições. O convívio com tais situação como o desemprego, o acidente de trabalho, o subemprego, a perseguição e a observação das contradições me conduzira aos estudos os de Marx, Engels, Lenin, ao marxismo e ao materialismo histórico; os estudos sobre a estrutura da sociedade capitalista e as construções das infraestruturas para alavancar o crescimento econômico. Essa condição social proporcionou o conhecimento sobre as contradições entre o movimento operário nacional e o movimento comunista internacional. Os primeiros estudos ainda na informalidade, em escolas dos movimentos sociais e sindicais foram elementos primordiais para me aprofundar na vida acadêmica bem como a problemática sobre as contradições no movimento operário, nacional e internacional. Os estudos da filosofia, da moral burguesa, da ética liberal e marxista contribuíram para elucidar princípios como horizonte histórico na luta pela emancipação humana. Estes princípios básicos estão na AIT Associação Internacional dos Trabalhadores, nos primeiros momentos da I.S. Internacional Socialista e da I.C. Internacional Comunista. Por último, esta tese trata da influência da Revolução Russa, da Primeira Guerra Mundial e o necessário Acordo de Paz pela garantia da estabilidade social e impulso do desenvolvimento econômico na Rússia. Os estudos sobre a I.C. trazem dois momentos especiais: o primeiro de 1919 a 1923, quando Lenin ainda vivia e dava direção ao movimento; o segundo foi de 1924 a 1943, depois da morte de Lenin e início das divergências entre Stalin e Trotski, culminando com o fim da entidade, talvez por exigência dos EUA e Inglaterra, em 1943, ápice da Segunda Guerra Mundial