Search results for "APR"
showing 10 items of 2648 documents
Metagenomes of Mediterranean Coastal Lagoons
2012
Coastal lagoons, both hypersaline and freshwater, are common, but still understudied ecosystems. We describe, for the first time, using high throughput sequencing, the extant microbiota of two large and representative Mediterranean coastal lagoons, the hypersaline Mar Menor, and the freshwater Albufera de Valencia, both located on the south eastern coast of Spain. We show there are considerable differences in the microbiota of both lagoons, in comparison to other marine and freshwater habitats. Importantly, a novel uncultured sulfur oxidizing Alphaproteobacteria was found to dominate bacterioplankton in the hypersaline Mar Menor. Also, in the latter prokaryotic cyanobacteria were almost exc…
Surface and deep water conditions in the Sicily channel (central Mediterranean) at the time of sapropel S5 deposition
2011
New centennial-scale data of benthic foraminifera assemblages and of stable isotopes of foraminifera shells from the Sicily Channel, representative of surface and bottom waters, over the interval between about 140 and 110 kyr BP, are presented. During this period anoxia developed on the eastern Mediterranean basin and sapropel S5 deposited. Although anoxic sediments have not been deposited in the Sicily Channel, this area is strategic to study the character of intermediate waters, whose chemical-physical properties strongly precondition the eastern Mediterranean deep water formation. So far, no data from these water masses have been obtained, apart from the isotopic composition of shells of…
A high-resolution record of the last deglaciation in the Sicily Channel based on foraminifera and calcareous nannofossil quantitative distribution
2003
Abstract Relative abundance fluctuations in planktic foraminiferal and calcareous nannofossil assemblages are reported on the basis of a high-resolution study of ODP Leg 160 Hole 963D, drilled in the Sicily Strait, near Capo Rossello (southern Sicily). With its 8 m of undisturbed sediments, the core covers the interval from 1.5 to 23 kyr, allowing a 50–100-yr sampling resolution. All the short warm and cold events and sub-events recorded in this time interval in the GRIP Greenland ice core and at several Mediterranean sites were recognized. On this basis, a total number of nine ecozones based on planktic foraminifera and seven ecozones based on calcareous nannofossils were identified. A sho…
Macrofungi in Mediterranean maquis along seashore and altitudinal transects
2014
In semi-arid Mediterranean environments, fungal activity is fundamental for buffering biotic and abiotic stress to the plant and for sustaining a vegetation cover. Despite the important role that fungi play in habitats stability, mycological data from Mediterranean ecosystems are scarce and fragmentary. We investigated fungal diversity in several areas characterized by Mediterranean maquis, from continental Italy, Sicily, and Greece in order to contribute to the analysis of distribution, ecology, and diversity of macrofungi in evergreen sclerophyllous shrublands at different elevation and distance from the seashore across the Mediterranean Basin. Several fungal taxa that are remarkable due …
CD28, a marker associated with tumoral expansion in multiple myeloma
1998
International audience; CD28 expression was thoroughly investigated on plasma cells of monoclonal gammopathy of undetermined significance, multiple myeloma (MM), and human myeloma cell lines. CD28+ plasma cells were detected in 19% of 31 monoclonal gammopathy of undetermined significance, 41% of 116 MM, and 100% of 13 human myeloma cell lines. CD28+ myeloma cells were detected in 21 of 79 (26%) MM cases at diagnosis, 13 of 22 (59%) at medullary relapse (P < 0.009), and 14 of 15 (93%) at extramedullary relapse (P = 0.05), including 10 of 10 (100%) secondary plasma cell leukemias (P = 0.05). Serial studies in individual patients confirmed the emergence of CD28+ myeloma cells with tumoral expa…
Relación entre el desarrollo de habilidades lingüísticas y el aprendizaje matemático en educación infantil y educación primaria: Estudio longitudinal
2017
El lenguaje como proceso cognitivo complejo y dinámico se encuentra relacionado con diversos procesos de aprendizaje, los estudios se dirigen especialmente a sus relaciones con los procesos de lectura y escritura. Sin embargo, una menor cantidad de estudios se han centrado, sobre todo en los últimos diez años, en establecer relaciones parciales entre algunas habilidades lingüísticas y el rendimiento matemático general o con ciertos aprendizajes matemáticos específicos. No obstante, estos estudios no consideran las relaciones de todas las habilidades lingüísticas que implica el lenguaje como proceso amplio y complejo, con cada tipo de aprendizaje matemático. Además, son escasos aquellos de c…
Aspectos del concepto de aprendizaje de las ciencias y el papel de la metacognición
1999
RESUMEN: En este artículo se aborda la perspectiva metacognitiva sobre el aprendizaje de las ciencias, se plantean los roles tanto de estudiantes como de profesores dentro de un modelo didáctico de aprendizaje y se clarifica lo que se debe entender por metacognitivo en el campo de la educación en ciencias. COL0008002
Wood-inhabiting fungal communities : Opportunities for integration of empirical and theoretical community ecology
2022
Publisher Copyright: © 2021 The Author The interest in studying wood-inhabiting fungal communities has grown in recent years. This interest has mainly been motivated by the important roles of wood-inhabiting fungi in ecosystem functioning (e.g. nutrient cycling) and conservation biology (e.g. their sensitivity to forest management). In this paper, I argue that another important, but yet largely unexplored motivation for studying wood-inhabiting fungal communities, is their potential to advance fundamental community ecology. One major advantage of wood-inhabiting fungi as model systems is that they are organized as spatially well-defined metacommunities, thus conforming to the assumptions of…
La construcció del coneixement gramatical en aprenents d'educació primària i secundària: algunes aproximacions a l'aprenentatge del verb
2017
El verb és una de les categories que una gramàtica escolar ha d’abordar necessàriament, tant pel que fa al coneixement de la noció i de la seva relació amb altres categories, com per la funció fonamental que pren en l’escriptura. En aquest article presentem tres recerques que descriuen el procés d’aprenentatge que els alumnes de primària i de secundària segueixen a l’hora d’aprendre continguts vinculats amb el verb: el temps del present, el mode verbal i la complementació verbal. Aquests treballs mostren quines estratègies desenvolupen els aprenents i quins obstacles han d’afrontar per desenvolupar un raonament gramatical. Dels estudis es desprèn que determinades intervencions didàctiques (…
¿Y dónde está la gracia? El humor en el aula de ELE
2017
Resumen : El presente trabajo muestra el fenomeno pragmatico del humor como un instrumento idoneo para suscitar la reflexion sobre el uso y funciones del lenguaje en los estudiantes de ELE. Una vez expuestas las referencias al humor verbal y a la ironia por parte del Marco Comun Europeo de Referencia y el Plan Curricular del Instituto Cervantes , ofreceremos una propuesta didactica cuyo objetivo es la activacion y desarrollo de la competencia comunicativa. Muestras humoristicas como el monologo pueden contribuir a mejorar las destrezas linguisticas y pragmaticas en ELE desde niveles iniciales. Palabras clave: Humor, Competencia metapragmatica, ELE, Propuesta didactica. Abstract: This paper…