First Record of an Extinct Marabou Stork in the Neogene of South America

We describe a new large species of marabou stork, Leptoptilus patagonicus(Ciconiiformes, Ciconiidae, Leptoptilini), from the late Miocene Puerto Madryn Formation, Chubut Province, Argentina. The specimen consists mainly of wing and leg bones, pelvis, sternum, cervical vertebrae, and a few fragments of the skull. We provisionally adopt the traditional system− atic scheme of ciconiid tribes. The specimen is referred to the Leptoptilini on the basis of similarities in morphology and intramembral proportions with the extant genera Ephippiorhynchus, Jabiru, and Leptoptilos. The fossil specimen resembles in overall morphology and size the species of Leptoptilos, but also exhibits several exclusive characters of the sternum, hu− merus, carpometacarpus, tibiotarsus, and pelvis. Additionally, its wing proportions differ from those of any living taxon, providing support to erect a new species. This is the first record of the tribe Leptoptilini in the Tertiary of South America.Fil: Noriega, Jorge Ignacio. Provincia de Entre Ríos. Centro de Investigaciones Científicas y Transferencia de Tecnología a la Producción. Universidad Autónoma de Entre Ríos. Centro de Investigaciones Científicas y Transferencia de Tecnología a la Producción. Consejo Nacional de Investigaciones Científicas y Técnicas. Centro Científico Tecnológico Conicet - Santa Fe. Centro de Investigaciones Científicas y Transferencia de Tecnología a la Producción; ArgentinaFil: Cladera, Gerardo. Museo Paleontológico Egidio Feruglio; Argentin

The mechanical behaviour of a prototype of a bar for pneumatic structures

The most common materials for structures built in civil engineering and architecture are concrete and steel. In another type of engineering, properties of materials for structures are very different. For example, the space technology and the aeronautics use structures in which the lightness is the main property of the material. Under the perspective of the execution of very light structures it is presented the possibility of the design of frame articulated structures constituted by rigidizable bars inflated with air pressure. The main goal of this work is to characterize the strength behaviour of a single inflated bar with high pressure air. Mechanical tests in laboratory will show the response of an inflated bar under tension, compression and bending. At a long term, the behaviour of a single bar will assist to desing more complex frame structures made by the assembly of inflated bars

Exponential square integrability for non-tangential limits of certain smooth functions

AbstractUnder the assumption of the boundedness of certain operator (resembling Lusin's area function) of a smooth function u that satisfies certain interior regularity property, we prove the exponential square integrability of the boundary values of u

New country record for Tetramereia convexa (Harold, 1869) (Coleoptera: Scarabaeidae: Scarabaeinae)

Tetramereia convexa (Harold, 1869) (Coleoptera: Scarabaeidae: Scarabaeinae) is reported for the first time from Loreto in Peru, being the western most record of the species in South America.Tetramereia convexa (Harold, 1869) (Coleoptera: Scarabaeidae: Scarabaeinae) es reportado por primera vez para Loreto en Perú, siendo el registro más occidental de la especie para Sur America

Geronogyps reliquus Campbell (Ciconiiformes: Vulturidae) en el Pleistoceno tardío de la provincia de Entre Ríos y su significado paleoambiental

Fil: Noriega, Jorge Ignacio. Provincia de Entre Ríos. Centro de Investigaciones Científicas y Transferencia de Tecnología a la Producción. Universidad Autónoma de Entre Ríos. Centro de Investigaciones Científicas y Transferencia de Tecnología a la Producción. Consejo Nacional de Investigaciones Científicas y Técnicas. Centro Científico Tecnológico Conicet - Santa Fe. Centro de Investigaciones Científicas y Transferencia de Tecnología a la Producción; ArgentinaFil: Tonni, Eduardo Pedro. Universidad Nacional de La Plata. Facultad de Ciencias Naturales y Museo. División Paleontología Vertebrados; Argentin

Circovirus porcino: un virus pequeño que genera un gran problema

Porcine circoviruses type 1 and type 2 (PCV-1 and PCV-2) are very small (17 nm), nonenveloped, icosahedral viruses (Tisher y col., 1982), with circular, single stranded DNA genomes of approximately 1,700 nucleotides length, encoding 2 major ambisense open reading frames (Mankertz y col., 1998; Hamel y col., 1998). Together with a number of avian viruses with similar molecular characteristics, the porcine circoviruses are classified in the genus Circovirus within the family Circoviridae. Although PCV-1 persists in the pig population, the presence of PCV-1 has not been associated with any recognised clinical signs or pathology. In contrast, PCV-2 has been implicated as the mayor causative agent of Postweaning Multisystemic Wasting Syndrome (PMWS). It is characterized mainly by loose of weight, general wasting, and severe immunosuppressive effects with premature death of piglets. PCV-2 effects are generated by inhibition of plasmacytoid dendritic cells (pdc) so called natural interferon-α producing cells (NIPCs) unlinking the innate and acquired immune systems, and renderinga host susceptible to secondary or concomitant microbial infections. Therefore, PCV-2 additionally is associated with other porcine diseases and syndromes, such as reproductive failure, respiratory disease complex, congenital tremor, porcine dermatitis and nephropathy syndrome, nectrotizing tracheitis and exudative epidermitis, together with other viral and bacterial agents, including Parvovirus, PRRSV (Porcine Reproductive and Respiratory Syndrome virus), Influenza, Aujeszky and Mycoplasma pneumoniae, Actinobacillus pleuropneumoniae, Streptococcus suis and Pastereulla multocida. Nowadays, these diseases are known as PCVAD or PCV-2-associated diseases, in order to group all the diseases attributed to porcine circovirus type 2. The PCV-2-associated diseases, mainly PMWS, at present are considered to be the greatest economic problem associated with the pig industry world-wide

Nuevo material de Macranhinga paranensis (Aves: Pelecaniformes: Anhingidae) del Mioceno Superior de la Formación Ituzaingó, provincia de Entre Ríos, Argentina

Fil: Noriega, Jorge Ignacio. Provincia de Entre Ríos. Centro de Investigaciones Científicas y Transferencia de Tecnología a la Producción. Universidad Autónoma de Entre Ríos. Centro de Investigaciones Científicas y Transferencia de Tecnología a la Producción. Consejo Nacional de Investigaciones Científicas y Técnicas. Centro Científico Tecnológico Conicet - Santa Fe. Centro de Investigaciones Científicas y Transferencia de Tecnología a la Producción; ArgentinaFil: Piña, Carlos Ignacio. Provincia de Entre Ríos. Centro de Investigaciones Científicas y Transferencia de Tecnología a la Producción. Universidad Autónoma de Entre Ríos. Centro de Investigaciones Científicas y Transferencia de Tecnología a la Producción. Consejo Nacional de Investigaciones Científicas y Técnicas. Centro Científico Tecnológico Conicet - Santa Fe. Centro de Investigaciones Científicas y Transferencia de Tecnología a la Producción; Argentin

Producción sin desperdicio: caso de estudio en un proceso de fabricación de galletas de coco

El presente trabajo trata sobre la aplicación de la metodología de Producción sin desperdicio en un proceso de un producto crítico del área de Galletería de una fábrica productora de galletas, waffers y recubiertos. El objetivo general es diseñar e implementar mejoras para disminuir el desperdicio y así aumentar la eficiencia y los niveles de productividad en el proceso productivo estudiado. La metodología aplicada consiste en un análisis para seleccionar la línea a estudiar, seguido de un análisis para seleccionar el producto. En este punto se podrá comprobar la validez de la hipótesis planteada. Posteriormente, se analiza el proceso del producto seleccionado y se utilizan herramientas de Calidad para encontrar las causas estratégicas y éstas se examinaran mediante el Análisis de Operaciones, el enfoque de este análisis se lo hará dependiendo de las causas estratégicas. Luego se plantean alternativas de mejora y se seleccionará las que se implantarán, adicionalmente se plantearán recomendaciones

Potential invasion of exotic ambrosia beetles Xyleborus glabratus and Euwallacea sp. in Mexico: A major threat for native and cultivated forest ecosystems

We analyze the invasive potential of two Asian ambrosia beetles, Xyleborus glabratus and Euwallacea sp., into Mexico and the southern United States. The fungal symbionts of these beetles have been responsible for damage to trees of the family Lauraceae, including Persea americana and other noncultivated tree species on both coasts of the United States. We estimate their potential threat using ecological niche modeling and spatial multi-criteria evaluation protocols to incorporate plant and beetle suitabilities as well as forest stress factors across Mexico. Mexico contains higher climatic and habitat suitability for X. glabratus than for Euwallacea sp. Within this country, the neotropical region is most vulnerable to invasion by both of these species. We also identify a corridor of potential invasion for X. glabratus along the Gulf of Mexico coast where most Lauraceae and native Xyleborus species are present; dispersal of either X. glabratus or Euwallacea sp. into this region would likely lead to major disease spread. However, the overall potential damage that these beetles can cause may be a function of how many reproductive hosts and how many other ambrosia beetles are present, as well as of their capacity to disperse. This work can also alert relevant managers and authorities regarding this threat