Desarrollo de competencias docentes en la Licenciatura en Enseñanza de las Matemáticas de la Universidad de Colima, mediante la implementación de una comunidad de práctica

Este proyecto de intervención aborda el desarrollo de competencias docentes en la Licenciatura en Enseñanza de las Matemáticas de la Universidad de Colima, mediante la implementación de una comunidad de práctica basada en los principios de gestión del conocimiento. Las fases desarrolladas fueron creación de una comunidad de práctica con los docentes de matemáticas, mapeo del conocimiento, combinación del conocimiento en la organización mediante el diseño del plan de intervención para la gestión de competencias docentes centradas en el aprendizaje, uso del conocimiento mediante la implementación de la intervención y toma de decisiones sobre la difusión, almacenamiento y acceso al conocimiento construido en la Facultad de Ciencias de la Educación de la Universidad de Colima. Los métodos de recolección de datos fueron la observación y entrevista. De manera concluyente se puede afirmar que los docentes de la Licenciatura en Enseñanza de las Matemáticas de la Universidad de Colima incorporaron estrategias centradas en el aprendizaje en su planeación de asignatura y su práctica docente

Ovine enzootic ataxia. It's histopathological evolution

Se describen las lesiones histo patológicas correspondientes a casos de ovinos con procesos de ataxia, consistentes en cromatolisis de las neuronas y procesos avanzados de desmielinización. Las zonas del SNC más afectadas correspondieron a la zona lumbar, cervical y torácica de la médula espinal y a la corteza cerebelosa. Los análisis efectuados de dosajes de cobre no coinciden con los valores inferiores descritos por otros autores para esta enfermedad.Histopathologic lesions of ovines with ataxia are described. They const of neurone chromatolysis and advanced processes of desmylinization. The cerebellar cortex, the cervical, thoracic and lumbar medulla were de most affected zones of the Central Nervous System. The cooper dosages of the liver made by polarography differed with the minimum levels reported by other research workers for this disease.Facultad de Ciencias Veterinaria

Ovine enzootic ataxia. It's histopathological evolution

Se describen las lesiones histo patológicas correspondientes a casos de ovinos con procesos de ataxia, consistentes en cromatolisis de las neuronas y procesos avanzados de desmielinización. Las zonas del SNC más afectadas correspondieron a la zona lumbar, cervical y torácica de la médula espinal y a la corteza cerebelosa. Los análisis efectuados de dosajes de cobre no coinciden con los valores inferiores descritos por otros autores para esta enfermedad.Histopathologic lesions of ovines with ataxia are described. They const of neurone chromatolysis and advanced processes of desmylinization. The cerebellar cortex, the cervical, thoracic and lumbar medulla were de most affected zones of the Central Nervous System. The cooper dosages of the liver made by polarography differed with the minimum levels reported by other research workers for this disease.Facultad de Ciencias Veterinaria

Ordovician fossils from the Obejo-Valsequillo Domain (Ossa-Morena Complex, Galicia–Ossa-Morena Zone), southwestern Spain

Se actualiza el registro paleontológico del Ordovícico (trilobites, graptolitos, braquiópodos, equinodermos, moluscos, conodontos) en el Dominio de Obejo-Valsequillo) representado en cinco localidades fosilíferas. Dos de ellas (sur de Alcaracejos y noreste de Belmez) corresponden a la llamada “Unidad Parautóctona” y las tres restantes (Campillo de Llerena, Villaharta y oeste de Adamuz) a las “Unidades Alóctonas”. Las asociaciones paleontológicas guardan ciertas semejanzas con las de la Zona Centroibérica pero representan retazos de una plataforma marina de gradiente opuesto a la surcentroibérica (profundización hacia el sur y suroeste vs. profundización hacia el norte y noreste). Ello implica grandes desplazamientos, congruentes con el modelo alóctono de la nueva Zona Galicia-Ossa Morena, tal vez en continuidad paleogeográfica hacia el noroeste con el Autóctono del suroeste de Iberia.The palaeontological record from the Ordovician of the Obejo-Valsequillo Domain is here updated and it includes trilobites, graptolites, brachiopods, echinoderms, mollusks and conodonts, coming from five fossil localities. Two of them (south of Alcaracejos and northeast of Belmez) correspond to the so-called “Parautochthonous Unit” and the remaining three (Campillo de Llerena, Villaharta and west of Adamuz) to the “Allochthonous Units”. These assemblages show some relationships with those from the Central Iberian Zone, but possibly represent the remains of a marine shelf under a gradient opposite to that of the south Central-Iberian one: i.e., deepening to the south and southwest instead of towards the north and northeast, respectively. This implies Variscan megadisplacements, congruent with the general allochthonous model of the new Galicia–Ossa-Morena Zone, and perhaps palaeogeographic continuity to the northwest with the Southwestern Iberian Autochthon during the Lower Palaeozoic.Depto. de Geodinámica, Estratigrafía y PaleontologíaFac. de Ciencias GeológicasTRUEMinisterio de Economía y Competitividad (MINECO)pu

Measurement report: In situ observations of deep convection without lightning during the tropical cyclone Florence 2018

Hurricane Florence was the sixth named storm in the Atlantic hurricane season 2018. It caused dozens of deaths and major economic damage. In this study, we present in situ observations of trace gases within tropical storm Florence on 2 September 2018, after it had developed a rotating nature, and of a tropical wave observed close to the African continent on 29 August 2018 as part of the research campaign CAFE Africa (Chemistry of the Atmosphere: Field Experiment in Africa) with HALO (High Altitude and LOng Range Research Aircraft). We show the impact of deep convection on atmospheric composition by measurements of the trace gases nitric oxide (NO), ozone (O$_{3}$), carbon monoxide (CO), hydrogen peroxide (H$_{2}$O$_{2}$), dimethyl sulfide (DMS) and methyl iodide (CH$_{3}$I) and by the help of color-enhanced infrared satellite imagery taken by GOES-16. While both systems, i.e., the tropical wave and the tropical storm, are deeply convective, we only find evidence for lightning in the tropical wave using both in situ NO measurements and data from the World Wide Lightning Location Network (WWLLN)

Shells and humans: molluscs and other coastal resources from the earliest human occupations at the Mesolithic shell midden of El Mazo (Asturias, Northern Spain)

Human populations exploited coastal areas with intensity during the Mesolithic in Atlantic Europe, resulting in the accumulation of large shell middens. Northern Spain is one of the most prolific regions, and especially the so-called Asturian area. Large accumulations of shellfish led some scholars to propose the existence of intensification in the exploitation of coastal resources in the region during the Mesolithic. In this paper, shell remains (molluscs, crustaceans and echinoderms) from stratigraphic units 114 and 115 (dated to the early Mesolithic c. 9 kys cal BP) at El Mazo cave (Asturias, northern Spain) were studied in order to establish resource exploitation patterns and environmental conditions. Species representation showed that limpets, top shells and sea urchins were preferentially exploited. One-millimetre mesh screens were crucial in establishing an accurate minimum number of individuals for sea urchins and to determine their importance in exploitation patterns. Environmental conditions deduced from shell assemblages indicated that temperate conditions prevailed at the time of the occupation and the morphology of the coastline was similar to today (rocky exposed shores). Information recovered relating to species representation, collection areas and shell biometry reflected some evidence of intensification (reduced shell size, collection in lower areas of exposed shores, no size selection in some units and species) in the exploitation of coastal resources through time. However, the results suggested the existence of changes in collection strategies and resource management, and periods of intense shell collection may have alternated with times of shell stock recovery throughout the Mesolithic.This research was performed as part of the project “The human response to the global climatic change in a littoral zone: the case of the transition to the Holocene in the Cantabrian coast (10,000–5000 cal BC) (HAR2010-22115-C02-01)” funded by the Spanish Ministry of Economy and Competitiveness. AGE was funded by the University of Cantabria through a predoctoral grant and IGZ was funded by the Spanish Ministry of Economy and Competitiveness through a Juan de la Cierva grant. We also would like to thank the University of Cantabria and the IIIPC for providing support, David Cuenca-Solana, Alejandro García Moreno and Lucia Agudo Pérez for their help. We also thank Jennifer Jones for correcting the English. Comments from two anonymous reviewers helped to improve the paper

Effect of Algarroba on Grazing Cow Behavior and Milk Production. I. Dry Season.

The effect of algarroba (Prosopis juliflora SW) arborization on grazing cow behavior and milk production was assessed. The trial was made in the rainy season, and six enclosures were used per arborization treatment (low arborization, 1-7 trees/ha; mid arborization, 12-16 trees/ha; high arborization, 20-27 trees/ha). Rational grazing was performed. The grass rested for 21-28 days, and sprinklers were used for irrigation. The animalsʼ activity time and the number of animals were registered. Milk production values were compared using ANOVA, following a randomized design with six replicas. No significant differences were observed in the morning grazing (118-203 min), but there were significant differences (P < 0.05) in the afternoon, in favor of more arborization (103-125 min), whereas in lands with mid and high arborization, cows ruminated longer, with higher water consumption and milk production, and values between 11.85-13.76 kg/v/day

Efecto de la temperatura y pH sobre la actividad y estabilidad de pectinasas producidas por Bacillus spp.

    Las pectinasas se encuentran ampliamente distribuidas en la naturaleza, como por ejemplo en productos de desecho, y su utilidad industrial es de gran importancia. En la presente investigación se trata de establecer algunos parámetros cinéticos a nivel de laboratorio para la producción de pectinasas por Bacillus spp. Se aisló y seleccionó cultivos puros de Bacillus spp. productores de la enzima a partir de muestras de tierra de cultivo de papa y naranja en medio agar nutritivo con sales y pectina como sustrato, se incubó y se realizó la lectura agregando alícuotas de una solución de lugol y aquellos cultivos que presentaban mayor halo de hidrólisis de pectina fueron seleccionados. Estos cultivos se sembraron en medio líquido nutritivo más sales y pectina y se incubaron por 24 – 48 horas; luego se centrifugaron y se obtuvo el sobrenadante denominado extracto crudo de pectinasa (ECP), el cual sirvió para realizar los ensayos de actividad y estabilidad del ECP a pHs y temperaturas variables.  Se encontró que el pH y temperatura de máxima actividad del ECP está alrededor de 6,5 y 35°C, respectivamente. El ECP es estable a pH 6,5 y 8,5 a 35°C por 120 minutos, lo mismo es cierto a temperatura de 50°C hasta por 129 minutos y pierde su estabilidad a 70°C a los 120 minutos.Palabras clave: Bacillus, pectinasas, pH, temperatura, actividad y estabilidad

Evaluation of turbulent dissipation rate retrievals from Doppler Cloud Radar

Turbulent dissipation rate retrievals from cloud radar Doppler velocity measurements are evaluated using independent, in situ observations in Arctic stratocumulus clouds. In situ validation data sets of dissipation rate are derived using sonic anemometer measurements from a tethered balloon and high frequency pressure variation observations from a research aircraft, both flown in proximity to stationary, ground-based radars. Modest biases are found among the data sets in particularly low- or high-turbulence regimes, but in general the radar-retrieved values correspond well with the in situ measurements. Root mean square differences are typically a factor of 4-6 relative to any given magnitude of dissipation rate. These differences are no larger than those found when comparing dissipation rates computed from tetheredballoon and meteorological tower-mounted sonic anemometer measurements made at spatial distances of a few hundred meters. Temporal lag analyses suggest that approximately half of the observed differences are due to spatial sampling considerations, such that the anticipated radar-based retrieval uncertainty is on the order of a factor of 2-3. Moreover, radar retrievals are clearly able to capture the vertical dissipation rate structure observed by the in situ sensors, while offering substantially more information on the time variability of turbulence profiles. Together these evaluations indicate that radar-based retrievals can, at a minimum, be used to determine the vertical structure of turbulence in Arctic stratocumulus clouds