1,839 research outputs found
Morphological and Genetic Variation in Mexican Wild Populations ofTamarixia radiata(Hymenoptera: Eulophidae)
En el presente estudio se analizó la variación morfológica y genética del ectoparasitoide ninfal del psílido asiático de los cítricos Tamarixia radiata (Waterston) (Hymenoptera: Eulophidae) en dos regiones de México, región noreste (representada por los estados de Nuevo León, y Tamaulipas) y región occidente (representada por los estados de Colima y Michoacán). Se encontró que la variación morfológica de los especímenes
analizados recae principalmente en variables cromáticas. En el estudio morfométrico se encontró que a diferencia de las hembras, los machos presentan heterogeneidad, la cual se concentró en el estado de Colima. La variación morfológica en el parasitoide no se asoció de forma exclusiva por alguna de las zonas geográficas de estudio. El análisis molecular reveló la presencia de dos haplotipos (H1 y H2), los cuales se han encontrado en investigaciones previas entre las poblaciones del parasitoide introducidas a Florida, E.U.A. El haplotipo H2 se encontró en todas las áreas de estudio y con mayor frecuencia que el H1, el cual se localizó solamente en la región noreste (estado de Tamaulipas), sugiriendo posibles puntos de flujo génico entre México-E.U.A. Los resultados poseen implicaciones para el uso extensivo de T. radiata en los programas de control biológico del psílido asiático de los cítricos.
ABSTRACT
We analyzed the morphological and genetic variation of the Asian citrus psyllid nymphal ectoparasitoid Tamarixia radiata (Waterston) (Hymenoptera: Eulophidae) in 2 regions of Mexico, in the northeast (represented by the states of Nuevo León and Tamaulipas) and the west (represented by the states of Colima and Michoacán). We found that the morphological variation of the specimens lay mainly in body color traits. The morphometric study indicated that in comparison with females, males presented heterogeneity, and it was concentrated in the state of Colima. Despite the morphological variation found in the species, it was not exclusively associated with any of the geographical regions. Molecular
analysis revealed the presence of 2 haplotypes (H1 and H2), which were the same found in previous research among strains introduced to Florida. Haplotype H2 was found in both studied regions and more frequently than haplotype H1, which was collected only in the northeast
(Tamaulipas state), suggesting possible points of gene flow between Mexico and the USA. Our results have implications for the extensive use of T. radiata in biological control programs of the Asian citrus psyllid
Phosphomannosylation and the functional analysis of the extended Candida albicans MNN4-like gene family
We thank Luz A. López-Ramírez (Universidad de Guanajuato) for technical assistance. This work was supported by Consejo Nacional de Ciencia y Tecnología (ref. CB2011/166860; PDCPN2014-247109, and FC 2015-02-834), Universidad de Guanajuato (ref. 000025/11; 0087/13; ref. 1025/2016; Convocatoria Institucional para Fortalecer la Excelencia Académica 2015; CIFOREA 89/2016), Programa de Mejoramiento de Profesorado (ref. UGTO-PTC-261), and Red Temática Glicociencia en Salud (CONACYT-México). NG acknowledges the Wellcome Trust (086827, 075470, 101873, and 200208) and MRC Centre for Medical Mycology for funding (N006364/1). KJ was supported by a research visitor grant to Aberdeen from China Scholarship Council (CSC No. 201406055024). The Supplementary Material for this article can be found online at: https://www.frontiersin.org/articles/10.3389/fmicb.2017.02156/full#supplementary-materialPeer reviewedPublisher PD
Cosmology with the SKA: theoretical prospectives
We briefly review the context of the SKA in the panorama of modern Cosmology. The SKA will undoubtedly be one of the most powerful tools for Cosmology during the first half of the XXIst century. Many of the fundamental questions of modern Cosmology, such as the nature of the dark energy and dark matter that dominate the dynamics of the Universe, will be answered by SKA-driven science. Moreover, SKA will shed light on many aspects of large-scale structure growth and galaxy formation as well as fundamental Physics regarding the early Universe, inflation and tests of General Relativity.The authors acknowledge partial support from the Spanish MINECO through projects AYA2013-
48623-C2-2, AYA2007-68058-C03-01, AYA2010-21766-C03-02, AYA2012-30789 and the Consolider-Ingenio projects CSD2010-00064 (EPI: Exploring the Physics of Inflation) and CSD2009-00064 (MultiDark), and from the Generalitat Valenciana through grants PROMETEOII/2014/060 and PROMETEOII/2014/084. RAL acknowledges the Spanish grant FPA2014-58183-P. CHM acknowledges the support of the Ramón y Cajal fellowship RyC 2011 148062 awarded by the Spanish MICINN and the Marie Curie Career Integration Grant CIG 294183.Peer reviewe
¿Qué entienden los expertos por comunicación responsable?
This paper explores the perspective of communication experts about the concept of responsible communication (RC). Seven experts were interviewed and the results indicate two perspectives: a first one that emphasizes the role of RC as a reactor axis of corporate reputation and a second one that bets on holism as the basis of organizational transversality. As a theoretical category, RC offers a better understanding of how organizations’ public communication may facilitate openness and understanding between organizations and society.Este artigo examina a perspectiva de especialistas sobre a comunicação responsável (CR). Foram entrevistados sete especialistas, e os resultados mostram duas perspectivas: uma que destaca o papel da CR como eixo norteador da reputação corporativa e outra que aposta no holismo como base da transversalidade organizacional. Como categoria teórica, a CR oferece um maior conhecimento sobre como a comunicação pública das organizações pode facilitar a abertura e a compreensão entre organizações e sociedade.Este trabajo explora la perspectiva de especialistas sobre comunicación responsable (CR). Siete expertos fueron entrevistados, y los resultados indican dos perspectivas: una que enfatiza el papel de la CR como eje rector de la reputación corporativa y otra que apuesta por el holismo como base de la transversalidad organizacional. Mientras categoría teórica, la CR ofrece un mayor conocimiento sobre la forma en que la comunicación pública de las organizaciones puede facilitar la apertura y el entendimiento entre organizaciones y sociedad
The History of the El Niño - Southern Oscillation according to lacustrine and marine sediments
El gran impacte que El Niño Oscil·lació del Sud (ENSO) té en
la nostra societat industrialitzada ha esperonat la comunitat
científica d'arreu a entendre quins són els mecanismes físics
que el controlen, així com clarificar quina ha estat la seva història.
El registre sedimentari de sensors naturals, com els llacs o la
mar, ha permès reconstruir la història de l'ENSO. En aquest article,
els autors donen una visió sintètica de la història d'aquest
fenomen climàtic al llarg dels darrers quatre milions d'anys.The large impact of the El Niño Southern Oscillation (ENSO) in
our industrial society has spurred the scientific community to
understand the physical processes that trigger this climate
phenomenum and to elucidate its history. The sedimentary
record of natural sensors, such as lakes and seas, was used to
reconstruct the history of the ENSO and to obtain a comprehensive
history of this climate phenomenon throughout the last
4 million years
Comparison of two phenotypical methods to segregate resistant and susceptible lambs to parasitic nematodes
The objective of this study was to compare two segregation methods to select resistant and susceptible female Pelibuey lambs infected naturally with gastrointestinal nematodes (GINs) in relation to their haematological and immunological response. For 6 months, faeces and blood samples were taken fortnightly from 40 grazing 5-month-old female lambs. The lambs were classified according to two methods using faecal egg count (FEC) as a phenotypical trait. In the first (reference) method (M3SE, n = 22), resistant (RES) lambs had FEC lower than the mean – 3 standard errors, the susceptible (SUS) lambs levels higher than + 3 standard errors(n = 10) and the intermediate (INT) lambs (n = 8) were categorised by having FECs between the two values. The second method (QUM) divided the population, using quartiles, into resistant (RES; 25%), intermediate (INT; 50%), and susceptible (SUS; 25%) lambs. The agreement between both methods was estimated using the Kappa index. The packed cell volume (PCV), total plasma protein (TPP) and peripheral eosinophils (EOS) were determined for each group. Serum was used to evaluate the IgA levels. PCV and TPP values were higher (P<0.01) in the RES lambs (31.5 ± 3.4 and 6.16 ± 0.5 g/dL by QUM, respectively, and 31.5 ± 3.9 and 6.24 ± 0.49 g/dL by M3SE, respectively) than the SUS lambs (28.1 ± 4.7 and 5.94 ± 0.5 g/d, respectively, by both methods). The EOS and IgA values increased with age. M3SE and QUM were in moderate agreement (Kappa = 0.43). We concluded that the two segregation methods allowed for the identification of the same female SUS lambs, but a greater number of animals were categorised phenotypically as resistant using the M3SE method. PCV and TPP can help to identify phenotypically resistant animals
Effect of including a dietary supplement of raisins, a food rich in polyphenols, on cognitive function in healthy older adults; a study protocol for a randomized clinical trial
Background Polyphenols have been shown to be effective against many chronic diseases, including neurodegenerative diseases. Specifically, the consumption of raisins, being a food rich in polyphenols, has been attributed with neuroprotective benefits. Therefore, our main objective is to evaluate the effect of including 50 g of raisins in the diet daily for 6 months, on the improvement of cognitive performance, cardiovascular risk factors and markers of inflammation in a population of older adults without cognitive impairment.
Methods Design and intervention: This study will be a randomized controlled clinical trial of two parallel groups.
Each subject included in the study will be randomly assigned to one of two study groups: control group (no supplement), intervention group (50 g of raisins daily during 6 months).
Study population: The participants will be selected by consecutive sampling in the Primary Care consultations of urban health centers in Salamanca and Zamora (Spain), taking into account the selection criteria.
Study variables: Two visits will be made, baseline and at 6 months. Cognitive performance will be evaluated (MiniMental State Examination test, Rey Auditory Verbal Learning Test, verbal fluency and montreal cognitive assessmentm(Moca)). It will also be analyzed the level of physical activity, quality of life, activities of daily living, energy and nutritional composition of the diet, body composition, blood pressure, heart rate, markers of inflammation and othermlaboratory tests of clinical relevance (glycaemia, total cholesterol, HDL cholesterol, LDL cholesterol and triglycerides).
In addition, sociodemographic data, personal and family history, medication use and alcohol and tobacco consumption will be collected.
Discussion In this project, it is intended to contribute to minimize the problems derived from cognitive deterioration
in older people
An Interpretation of Article 24 of the Constitution of Japan: Reconsidering the Principle of \u27\u27Gender Equality\u27\u27 from the Perspective of \u27\u27the Dilemma of Difference\u27\u27
This paper presents a novel methodology to calculate cation diffusion coefficients and activation energies in cubic Y2O3–ZrO2 by Molecular Dynamics. The calculation is based upon modulating the interaction potential to promote cation mobility within the lattice. The technique was calibrated by measuring static properties and oxygen self-diffusion characteristics, and then applied to cation diffusion. The respective activation energies and diffusion coefficients agree well with experimental findings. Preliminary results about grain boundary cation diffusion are presented for the first time as a proof of the potentiality of the procedureMinisterio de Ciencia e Innovación MAT2009-14351-C02-01, MAT2009-14351-C02-02Agencia Española de Cooperación Internacional y Desarrollo 53687
Interplay of Surface Diffusion and Surface Tension in the Evolution of Solid/Liquid Interfaces : Dealloying of β-Brass in Aqueous Sodium Chloride
The dealloying of β-brass in 0.5 M aqueous NaCl was studied by electrochemical techniques at different temperatures in the range 278 K ≤ T ≤ 318 K, complemented with in situ scanning tunneling microscopy (STM) imaging. In the potential region where the electrodissolution of zinc and the formation of vacancies and copper islands take place, two different roughness regimes were distinguished. When dealloying involves only a few monolayers (ML) the process approaches a quasiuniform alloy electrodissolution, whereas after electrodissolution of more than 20 ML, void formation takes place. In both regimes the interface evolution was analyzed by applying the dynamic scaling method to in situ STM imaging data. The first roughness regime exhibits a stable interface consisting of copper-rich islands that coarsen with time according to a surface diffusion controlled process. The second roughness regime exhibits an unstable interface due to a curvature dependent corrosion rate enhancing zinc electrodissolution at cavities. The overall interface evolution is well-described by a differential stochastic equation containing an electrodissolution term and surface rearrangement terms related to surface diffusion and negative surface tension effect.Instituto de Investigaciones Fisicoquímicas Teóricas y Aplicada
Observation of a gel of quantum vortices in a superconductor at very low magnetic fields
A gel consists of a network of particles or molecules formed for example using the sol-gel process, by which a solution transforms into a porous solid. Particles or molecules in a gel are mainly organized on a scaffold that makes up a porous system. Quantized vortices in type-II superconductors mostly form spatially homogeneous ordered or amorphous solids. Here we present high-resolution imaging of the vortex lattice displaying dense vortex clusters separated by sparse or entirely vortex-free regions in β-Bi2Pd superconductor. We find that the intervortex distance diverges upon decreasing the magnetic field and that vortex lattice images follow a multifractal behavior. These properties, characteristic of gels, establish the presence of a novel vortex distribution, distinctly different from the well-studied disordered and glassy phases observed in high-temperature and conventional superconductors. The observed behavior is caused by a scaffold of one-dimensional structural defects with enhanced stress close to the defects. The vortex gel might often occur in type-II superconductors at low magnetic fields. Such vortex distributions should allow to considerably simplify control over vortex positions and manipulation of quantum vortex states.Fil: Llorens, José Benito. Universidad Autónoma de Madrid; EspañaFil: Embon, Lior. Weizmann Institute Of Science.; IsraelFil: Correa, Alexandre. Consejo Superior de Investigaciones Científicas; España. Instituto de Ciencia de Materiales de Madrid; EspañaFil: González, Jesús David. Universidad del Magdalena; Colombia. Universiteit Antwerp; BélgicaFil: Herrera, Edwin. Universidad Autónoma de Madrid; España. Universidad Central; ColombiaFil: Guillamón, Isabel. Universidad Autónoma de Madrid; EspañaFil: Luccas, Roberto F.. Consejo Superior de Investigaciones Científicas; EspañaFil: Azpeitia, Jon. Consejo Superior de Investigaciones Científicas; EspañaFil: Mompeán, Federico J.. Consejo Superior de Investigaciones Científicas; EspañaFil: García Hernández, Mar. Consejo Superior de Investigaciones Científicas; EspañaFil: Munuera, Carmen. Consejo Superior de Investigaciones Científicas; EspañaFil: Aragón Sánchez, Jazmín. Comisión Nacional de Energía Atómica. Gerencia del Area de Investigación y Aplicaciones No Nucleares. Gerencia de Física (Centro Atómico Bariloche). División Bajas Temperaturas; Argentina. Consejo Nacional de Investigaciones Científicas y Técnicas. Oficina de Coordinación Administrativa Ciudad Universitaria. Unidad Ejecutora Instituto de Nanociencia y Nanotecnología. Unidad Ejecutora Instituto de Nanociencia y Nanotecnología - Nodo Bariloche | Comisión Nacional de Energía Atómica. Unidad Ejecutora Instituto de Nanociencia y Nanotecnología. Unidad Ejecutora Instituto de Nanociencia y Nanotecnología - Nodo Bariloche; ArgentinaFil: Fasano, Yanina. Comisión Nacional de Energía Atómica. Gerencia del Area de Investigación y Aplicaciones No Nucleares. Gerencia de Física (Centro Atómico Bariloche). División Bajas Temperaturas; Argentina. Consejo Nacional de Investigaciones Científicas y Técnicas. Oficina de Coordinación Administrativa Ciudad Universitaria. Unidad Ejecutora Instituto de Nanociencia y Nanotecnología. Unidad Ejecutora Instituto de Nanociencia y Nanotecnología - Nodo Bariloche | Comisión Nacional de Energía Atómica. Unidad Ejecutora Instituto de Nanociencia y Nanotecnología. Unidad Ejecutora Instituto de Nanociencia y Nanotecnología - Nodo Bariloche; ArgentinaFil: Milosevic, Milorad V.. Universiteit Antwerp; BélgicaFil: Suderow, Hermann. Universidad Autónoma de Madrid; EspañaFil: Anahory, Yonathan. The Hebrew University of Jerusalem; Israe
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