374 research outputs found
The Egyptian Temple as a Place to House Collections (from the Old Kingdom to the Late Period)
Integral field spectroscopy of HII regions in M33
Integral field spectroscopy (IFS) is presented for star forming regions in
M33. A central area of 300 x 500 pc^2 and the external HII region IC 132, at a
galactocentric distance {\sim} 19arcmin (4.69 kpc) were observed with the
Potsdam Multi Aperture Spectrophotometer (PMAS) instrument at the 3.5 m
telescope of the Calar Alto Hispano- Alem\'an observatory (CAHA). The spectral
coverage goes from 3600 A to 1{\mu}m to include from [OII]{\lambda}3727 A to
the near infrared lines required for deriving sulphur electron temperature and
abundance diagnostics. Local conditions within individual HII regions are
presented in the form of emission line fluxes and physical conditions for each
spatial resolution element (spaxel) and for segments with similar H{\alpha}
surface brightness. A clear dichotomy is observed when comparing the central to
outer disc HII regions. While the external HII region has higher electron
temperature plus larger H{\beta} equivalent width, size and excitation, the
central region has higher extinction and metal content. The dichotomy extends
to the BPT diagnostic diagrams that show two orthogonal broad distributions of
points. By comparing with pseudo-3D photoionization models we conclude that the
bulk observed differences are probably related to a different ionization
parameter and metallicity. Wolf-Rayet features are detected in IC 132, and
resolved into two concentrations whose integrated spectra were used to estimate
the characteristic number of WR stars. No WR features were detected in the
central HII regions despite their higher metallicity.Comment: 72 pages, 37 figure
The effects of native shrub, fencing, and acorn size on the emergence of contrasting co-occurring oak in Mediterranean grazed areas
Producción CientíficaResearch Highlights: The regeneration of Quercus species is usually very difficult in many
oak woodlands transformed by livestock farming. Some studies have reported that shrubs can
facilitate regeneration. However, the strength of interaction may vary depending on, among other
factors, the shrub species and the stress tolerance of the oak species. Moreover, further studies are
necessary to clarify the relative importance of the two facilitation mechanisms in the same community.
Background and Objectives: Cytisus multiflorus (L’Her.) Sweet is a predominant shrub species in
the Mediterranean grazed open-oak-woodlands found in the central west of the Iberian Peninsula
(bioclimatic limit) and is present with Quercus pyrenaicaWilld and Quercus ilex subsp. ballota Samp
trees. Thus, we assessed the effect of these native shrubs and acorn size, and the effect of excluding
large herbivores, on the seedling emergence of two contrasting co-occurring Quercus species under
a bioclimatic limit. Materials and Methods: A manipulative field experiment was carried out
considering four treatments as a combination of shrubs (shrub/no-shrub) and fence (fenced/open)
factors. A total of twenty plots, five replicates for each treatment were available. In each plot,
20 acorns were sown: 10 acorns (5 small and 5 large) for each Quercus species. Acorn emergence was
recorded during the first four years following the sowing. Results: Seedling emergence took place
mostly in the spring of the first year after sowing. The presence of shrub was the main significant
factor and incremented the emergence of both Q. ilex and Q. pyrenaica. The effect of the fence
depended on the Quercus species considered, improving only the emergence of Q. pyrenaica. A
negative effect with the small acorns was detected but only for Q. pyrenaica. In all treatments, Q. ilex
emerged more than Q. pyrenaica. Conclusions: C. multiflorus had a clear facilitative effect on the
seedling emergence of Q. ilex and Q. pyrenaica, which was much greater than the physical effect that
acorn size and excluding large herbivores had. As such, this native shrub may have a key role in
oak regeneration in Mediterranean grazed areas. Furthermore, in these areas of contact between
marcescent and sclerophyllous Quercus species, Q. ilex currently emerges more than Q. pyrenaica. This
could be indicative of a shift towards more xeric climatic conditions, which could lead to a change in
the dominant tree species in the future. However, this change could be modulated by the effects of
native shrub and large herbivores.Junta de Castilla y León - (Project SA013G19)Universidad de Salamanca - (Programa de financiación de grupos de investigación (2014/00165/001)
Pattern Dystrophy of the Macula in a Case of Steinert Disease
IntroductionMyotonic dystrophies are typically associated with ocular complications like ptosis, weakness of the ocular muscle and cataracts, but also with less recognized retinal changes.Case ReportA 41-year-old female with type 1 myotonic dystrophy complained of progressive vision loss. Slit lamp examination revealed the presence of typical bilateral polychromatic cataract with posterior subcapsular component. Dilated fundus examination was remarkable for bilateral macular depigmented changes. Multimodal imaging analysis of the macula suggested the presence of a butterfly-shaped pattern dystrophy.DiscussionIn cases of myotonic dystrophies it is of great relevance to analyze the presence of retinal changes that might limit the visual improvement following cataract extraction
The Effects of Native Shrub, Fencing, and Acorn Size on the Emergence of Contrasting Co-Occurring Oak in Mediterranean Grazed Areas
[ENG]Research Highlights: The regeneration of Quercus species is usually very difficult in many
oak woodlands transformed by livestock farming. Some studies have reported that shrubs can
facilitate regeneration. However, the strength of interaction may vary depending on, among other
factors, the shrub species and the stress tolerance of the oak species. Moreover, further studies are
necessary to clarify the relative importance of the two facilitation mechanisms in the same community.
Background and Objectives: Cytisus multiflorus (L’Her.) Sweet is a predominant shrub species in
the Mediterranean grazed open-oak-woodlands found in the central west of the Iberian Peninsula
(bioclimatic limit) and is present with Quercus pyrenaicaWilld and Quercus ilex subsp. ballota Samp
trees. Thus, we assessed the effect of these native shrubs and acorn size, and the effect of excluding
large herbivores, on the seedling emergence of two contrasting co-occurring Quercus species under
a bioclimatic limit. Materials and Methods: A manipulative field experiment was carried out
considering four treatments as a combination of shrubs (shrub/no-shrub) and fence (fenced/open)
factors. A total of twenty plots, five replicates for each treatment were available. In each plot,
20 acorns were sown: 10 acorns (5 small and 5 large) for each Quercus species. Acorn emergence was
recorded during the first four years following the sowing. Results: Seedling emergence took place
mostly in the spring of the first year after sowing. The presence of shrub was the main significant
factor and incremented the emergence of both Q. ilex and Q. pyrenaica. The effect of the fence
depended on the Quercus species considered, improving only the emergence of Q. pyrenaica. A
negative effect with the small acorns was detected but only for Q. pyrenaica. In all treatments, Q. ilex
emerged more than Q. pyrenaica. Conclusions: C. multiflorus had a clear facilitative effect on the
seedling emergence of Q. ilex and Q. pyrenaica, which was much greater than the physical effect that
acorn size and excluding large herbivores had. As such, this native shrub may have a key role in
oak regeneration in Mediterranean grazed areas. Furthermore, in these areas of contact between
marcescent and sclerophyllous Quercus species, Q. ilex currently emerges more than Q. pyrenaica. This
could be indicative of a shift towards more xeric climatic conditions, which could lead to a change in
the dominant tree species in the future. However, this change could be modulated by the effects of
native shrub and large herbivores
Creencias y perspectivas docentes sobre objetivos curriculares y factores determinantes de actividad física
The purpose of the study was to find out what relevance certain curriculum aims are given by teachers and their beliefs about the importance that several factors have on students taking after school physical activities. One hundred and seventy-three Physical Education (PE) teachers from nine Autonomous Communities were interviewed. The questionnaire was designed and validated by the research team. The results show that teachers think that their efforts must aim particularly at meeting �\supradisciplinary. social demands which are included in the planning of other subjects too, and they regard as less urgent those aims which are exclusive to PE (disciplinary knowledge and motor performance). Also, they believe that the factors with the lowest degree of relevance for boys and girls to practise after school physical activity are those included in aims belonging exclusively to PE. Teachers show lack of confidence in their specific possibilities to motivate the adherence of students to physical activity.El estudio tuvo como propósito conocer la relevancia para el profesorado de determinados objetivos curriculares y sus creencias sobre la importancia que tienen diversos factores para que el alumnado realice actividad física extraescolar. Participaron 173 docentes de Educacion Fisica (EF), distribuidos geograficamente en 9 Comunidades Autonomas. Se aplico un cuestionario disenado y validado por el grupo de investigacion. Los resultados muestran que el profesorado opina que su ensenanza ha de orientarse sobre todo a dar respuesta a demandas sociales �\supradisciplinares. de las que tambien se ocupan otras materias, considerando que son menos prioritarios aquellos objetivos exclusivos de la EF (conocimiento disciplinar y rendimiento motor). Asimismo, creen que los factores con menor relevancia para que chicos y chicas practiquen actividad fisica extraescolar son aquellos que directamente recogen objetivos a los que la EF contribuye en exclusividad. El profesorado muestra falta de confianza en sus posibilidades mas especificas de influir en la adherencia hacia la actividad fisica de su alumnado
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
Potencial productivo de esquejes de boniato (Ipomoea batatas (L.) Lam.) procedentes de una nueva tecnología de producción de semilla agámica.
l trabajo se realizó en el Instituto de Investigaciones en Viandas Tropicales durante el periodo de septiembre del 2008 a abril 2009, con los objetivos de determinar la cantidad de esquejes que proporciona el vivero y la frecuencia de corte, así como comparar el potencial productivo de cada corte. El Experimento consistió en el montaje de cámaras de aproximadamente 1m de ancho y 15m de largo, se utilizaron raíces tuberosas del clon comercial INIVIT B2-2005 como material de plantación. Se comprobó que durante la fase del vivero este proporcionó un total de nueve cortes tanto en la época frío como en primavera con un total de 764 y 1390 esquejes respectivamente. Después de cortados los esquejes fueron llevados al campo donde se realizó un estudio para determinar los rendimientos correspondientes a cada tratamiento (número de cortes). Se utilizó un diseño de bloques al azar con cuatros réplicas. Los resultados mostraron que en pequeñas áreas de viveros se puede obtener un número significativo de esquejes y de muy buena calidad productiva además de que los esquejes procedentes de diferentes momentos de cortes presentan igual comportamiento en cuanto al rendimiento
Evaluación de la capacidad reproductiva de sementales bovinos mantenidos en clima tropical húmedo
El objetivo de este estudio fue evaluar la capacidad reproductiva de sementales bovinos y determinar el efecto de factores tales como raza, edad y anormalidad anatómicas dcl aparato reproductor
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