Ciencias Naturales y Exactas: Recent submissions
Now showing items 221-240 of 581
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Molecular epidemiology and phylogenetic analysis of human papillomavirus infection in women with cervical lesions and cancer from the coastal region of Ecuador
(Asociación Argentina de Microbiología, 2018-04-01)El objetivo del presente estudio fue aportar información sobre la epidemiología molecular del virus del papiloma humano (human papillomavirus [HPV]) y los factores de riesgo asociados al desarrollo de lesiones cervicales ... -
Trabajos varios sobre papiloma virus humano en el sur de Ecuador
(Instituto Nacional de Investigación en Salud Pública, 2018-03-30)Aprovechando la realización de las XL Jornadas Nacionales de Biología Espol en la ciudad de Guayaquil, se realizó una sesión dedicada a la epidemiología del virus de papiloma humano (VPH) y del cáncer cervical. Esta sesión ... -
Polycyclic aromatic hydrocarbons (PAHs) in yerba mate (Ilexparaguariensis St. Hil) traditional infusions (mate and terere)
(Elsevier, 2016-02-01)This study describes the occurrence of polycyclic aromatic hydrocarbons (PAHs) in traditional yerba maté hot and cold infusions ( mate and tereré), by monitoring the content of benz[a]anthracene, chrysene, benzo[b]fluoranthene, ... -
Chromosome evolution in Cophomantini (Amphibia, Anura, Hylinae)
(Public Library of Science, 2018-02-14)The hylid tribe Cophomantini is a diverse clade of Neotropical treefrogs composed of the genera Aplastodiscus, Boana, Bokermannohyla, Hyloscirtus, and Myersiohyla. The phylogenetic relationships of Cophomantini have been ... -
A new species of Pseudopaludicola (Anura, Leiuperinae) from Espírito Santo, Brazil
(PeerJ Inc., 2018-05-16)We describe a new anuran species of the genus Pseudopaludicola that inhabits sandy areas in resting as associated to the Atlantic Forest biome in the state of Espírito Santo, Brazil. The new species is characterized by: ... -
Recubrimientos porosos de dióxido de titanio sintetizados por oxidación anódica
(Universidad Federal de Rio de Janeiro, 2018-07-19)El TiO2 es uno de los materiales más utilizados en el proceso de fotocatálisis heterogénea debido a su disponibilidad comercial, bajo costo, baja toxicidad y elevada actividad fotocatalítica. Uno de los métodos más eficientes ... -
Influencia de los tratamientos térmicos en recubrimientos anódicos nanotubulares de TiO2
(Universidad Federal de Rio de Janeiro, 2018-07-19)El TiO2 es un semiconductor ampliamente utilizado en el proceso de fotocatálisis heterogénea para la des-contaminación de aguas. Diversos estudios indican que las estructuras ordenadas de nanotubos en fase ana-tasa mejoran ... -
Caracterización electroquímica de películas de óxido de zinc obtenidas por anodizado en medio alcalino
(Universidad Federal de Rio de Janeiro, 2018-07-19)El óxido de Zinc es un material de particular interés a causa de sus propiedades ópticas y eléctricas únicas, que son exploradas para muchas aplicaciones en optoelectrónica y nanoelectrónica; y que puede ser sintetizado ... -
Heterogeneous photocatalytic Cr(VI) reduction with short and long nanotubular TiO2 coatings prepared by anodic oxidation
(Elsevier, 2018-01-01)Nanotubular TiO2 coatings prepared by anodic oxidation of titanium were evaluated for the first time in the photocatalytic Cr(VI) reduction in the presence of EDTA. Small nanotubes (SN) were prepared by using aqueous ... -
Yerba mate (Ilex paraguariensis, A. St.-Hil.) de novo transcriptome assembly based on tissue specific genomic expression profiles
(BioMed Central, 2018-12-07)Background: The most common infusion in southern Latin-American countries is prepared with dried leaves of Ilex paraguariensis A. St.-Hil., an aboriginal ancestral beverage known for its high polyphenols concentration ... -
What happened in the South American Gran Chaco? Diversification of the endemic frog genus Lepidobatrachus Budgett, 1899 (Anura: Ceratophryidae)
(Elsevier, 2018)The Chaco is one the most neglected and least studied regions of the world. This highly-seasonal semiarid biome is an extensive continuous plain without any geographic barrier, and in spite of its high species diversity, ... -
When the cure kills—CBD limits biodiversity research : national laws fearing biopiracy squelch taxonomy studies
(American Association for the Advancement of Science, 2018-06-29)The Convention on Biological Diversity (CBD) commits its 196 nation parties to conserve biological diversity, use its components sustainably, and share fairly and equitably the benefits from the utilization of genetic ... -
Hyla prasina Burmeister, 1856 meets the requirements of Article 23.9.1 of the Code for a reversal of precedence over Hyla quoyi Bory de Saint-Vincent, 1828 (Anura, Hylidae)
(Magnolia Press, 2018-07-04)In a recent work, Ohler and Dubois (2018) discussed the correct application of Article 23.9 of the Code (Anonymous,1999; 2012) and illustrated it with some concrete cases in which the authors considered that the Article ... -
Sistemática y Diversidad
(Asociación Herpetológica Argentina, 2018-08-19) -
Population fluctuation of Culicoides insignis Lutz (Diptera: Ceratopogonidae) in Posadas, Misiones, Argentina
(Sociedad Entomológica Argentina, 2018-12-27)En Argentina, la distribución de la enfermedad del Virus de la Lengua Azul se encuentra restringida al noreste del país. En la región Neotropical el principal vector sería Culicoides insignis Lutz. El objetivo de este ... -
Uncovering the evolutionary history of neo-XY sex chromosomes in the grasshopper Ronderosia bergii (Orthoptera, Melanoplinae) through satellite DNA analysis
(BioMed Central, 2018-01-08)Background Neo-sex chromosome systems arose independently multiple times in evolution, presenting the remarkable characteristic of repetitive DNAs accumulation. Among grasshoppers, occurrence of neo-XY was repeatedly noticed ... -
Seed‐dispersal networks are more specialized in the Neotropics than in the Afrotropics
(Wiley-Blackwell Publishing, 2019-01-03)Aim: Biogeographical comparisons of interaction networks help to elucidate diffeences in ecological communities and ecosystem functioning at large scales. Neotropical ecosystems have higher diversity and a different ... -
Trophic structure of frugivorous bats in the Neotropics : emergent patterns in evolutionary history
(Wiley-Blackwell Publishing, 2018-01-31)1. Knowing the relative importance of phylogeny in dietary specialisation in frugivorous bats is key to understanding the ecological and evolutionary processes that drove their diversification and to elucidating the ... -
Integrative analysis of chromosome banding, telomere localization and molecular genetics in the highly variable Ctenomys of the Corrientes group (Rodentia; Ctenomyidae)
(Springer, 2018-08-03)The genus Ctenomys comprises about 70 species with great chromosome diversity. The Corrientes group is one of the most chromosomally variable lineages in the genus, where the diploid number (2n) varies from 41 to 70. In ... -
Cinética de pérdida de agua y ganancia de aceite de snacks fritos de mandioca
(Universidad Nacional de Misiones. Facultad de Ciencias Exactas, Químicas y Naturales. Secretaria de Investigación y Posgrado, 2018-08-23)El objetivo de este estudio fue determinar la cinética de pérdida de agua y ganancia de aceite durante el proceso de fritura por inmersión profunda de snacks preparados con puré de mandioca y evaluar los efectos de los ...