Search results for " Experimental"
showing 10 items of 3530 documents
Energy requirement and kinetics of transport of poly(A)-free histone mRNA compared to poly(A)-rich mRNA from isolated L-cell nuclei.
1989
ATP-promoted efflux of poly(A)-rich RNA from isolated nuclei of prelabeled mouse lymphoma L5178y cells has an activation energy of 51.5 kJ/mol, similar to that found for the nuclear envelope nucleoside triphosphatase (48.1 kJ/mol) assumed to be involved in mediating nucleocytoplasmic transport of at least some RNA. Here we show that efflux of two specific poly(A)-rich mRNAs (actin and beta-tubulin) from isolated L-cell nuclei is almost totally dependent on the presence of ATP, while efflux of poly(A)-free histone mRNA (H4, H2B, and H1) also occurs to a marked extent in the absence of this nucleotide. Measurements of temperature dependence of transport rate revealed an activation energy of 5…
The coupling between face and emotion recognition from early adolescence to young adulthood
2020
Abstract In the present study, we investigated whether differentiation occurs between identity and emotion processing as development in both domains proceeds across adolescence and during the transition into young adulthood. A sample of 343 participants between 11 and 24 years performed the Glasgow Face Matching Task ( Burton, White, & McNeill, 2010 ) for identity-based face recognition and the Cambridge Face-Battery ( Golan, Baron-Cohen, & Hill, 2006 ) for complex emotion recognition. Our results show adult levels of face recognition by the end of early adolescence, while complex emotion recognition continues to develop into young adulthood. Although each ability matures at different rate,…
Action Observation Network Activity Related to Object-Directed and Socially-Directed Actions in Adolescents
2020
The human action observation network (AON) encompasses brain areas consistently engaged when we observe other's actions. Although the core nodes of the AON are present from childhood, it is not known to what extent they are sensitive to different action features during development. Because social cognitive abilities continue to mature during adolescence, the AON response to socially-oriented actions, but not to object-related actions, may differ in adolescents and adults. To test this hypothesis, we scanned with functional magnetic resonance imaging (fMRI) male and female typically-developing teenagers (n= 28; 13 females) and adults (n= 25; 14 females) while they passively watched videos of…
Estudio sobre el estado de Memoria en pacientes con Trastorno Mental Grave y aplicación - comparación de dos Tratamientos en Metacognición y posibles…
2021
Resumen: El trastorno mental grave (TMG) se considera de etiología multicausal, de carácter severo y persistente de síntomas psicóticos y engloba varios trastornos de entre los cuales el más estudiado es la esquizofrenia que manifiesta un deterioro cognitivo con inicio en fase premórbida. Según los estudios no existe síntoma patognomónico que la diferencia de otros trastornos. Sin embargo se ha podido comprobar que los déficits cognitivos que más se repiten dentro del trastorno son alteraciones de las funciones ejecutivas como la atención, inhibición, organización y planificación en la memoria de trabajo verbal (MTV), originando un deterioro en el nivel funcional del paciente. Aunque se rep…
Exploring fourth graders’ sourcing skills / Un análisis de la capacidad de escrutinio sobre las fuentes de información de los estudiantes de cuarto g…
2018
Acquiring information from the Web creates new educational demands even in elementary school. Children need to scrutinize source information (‘sourcing’) to choose trustworthy information. So far, ...
The relation between tumor cell proliferation and vascularization in differentiated and undifferentiated colon carcinomas in the rat.
1982
Tumor cell proliferation and tumor vascularization were investigated in differentiated and undifferentiated colon carcinomas of the rat. The following results were found: 1, in both tumor types, vascularization is developed equally well; 2, both in the differentiated and in the undifferentiated carcinomas, the number of proliferating tumor cells decreases with increasing distance from the capillaries; at a distance of about 80 microns, there is no longer any noteworthy tumor cell proliferation; 3, the differentiated and undifferentiated carcinomas differ both in the level of the mitosis index and 3H-thymidine labeling index as well as in their local proliferation pattern despite equal vascu…
Tipología de los errores en el cálculo mental : un estudio en el contexto educativo
1995
Resumen basado en el de la publicación Resumen en inglés Se aborda una tipología de errores y dificultades de los estudiantes españoles de un Colegio de Formación de Profesores cuando aplican métodos históricos de cálculo mental (métodos tomados de la tradición escrita que se encuentra en la aritmética) de los libros de texto para resolver problemas con números naturales y con números decimales. ESP
Radical analyticity and radical pro-drop scenarios of diachronic change in East and mainland Southeast Asia, West Africa and Pidgins and Creoles
2020
Abstract The paucity or absence of inflectional morphology (radical analyticity) and the omission of verbal arguments with no concomitant agreement (radical pro-drop) are well-known characteristics of East and mainland Southeast Asian languages (EMSEA). Both of them have a special status in typology and linguistic theory. Radical analyticity is known under the term of ‘morphological isolation’ and has recently been described as ‘diachronically anomalous’ (McWhorter 2016), while radical pro-drop is a theoretical challenge since Rizzi (1986). The present paper offers an alternative view on these characteristics based on data from EMSEA languages, radically analytic West African languages and …
Modulation of neuronal plasticity by events produced in adolescence: role of environmental enrichment and cannabis consumption
2017
Según Linda Spear, la adolescencia es un período de transición entre la juventud y la madurez, caracterizado por la toma de riesgos a nivel de conductual, pero también por un aumento de las hormonas sexuales (Spear, 2000). Además, hay una transformación importante en el cerebro adolescente, particularmente en el hipocampo, la amígdala y la corteza prefrontal. En esas zonas, así como en otras, durante este período se produce una remodelado dendrítico, una intensa mielinización y un fortalecimiento de la neurocircuitería. Las monoaminas dopamina, serotonina y melatonina participan en estos procesos y son cruciales en el comportamiento del adolescente (Arain et al., 2013). Además, en este perí…
Preferencias sexuales típicas y atípicas según sexo y edad de los estímulos: utilidad de la técnica de rastreo ocular
2018
Esta tesis doctoral presenta evidencia sobre la utilidad de los paradigmas atencionales y la técnica de rastreo ocular en la identificación de preferencias sexuales típicas y atípicas, estas últimas no desviadas y desviadas, como la pedofilia, altamente riesgosa para conductas sexuales como el abuso sexual infantil. El primer capítulo contiene una revisión conceptual y empírica general. Se divide en cinco partes. La primera parte describe el modelo de procesamiento de la información del arousal sexual que fundamenta el uso de paradigmas atencionales para acceder a procesos cognitivos tempranos y tardíos subyacentes a las preferencias sexuales. En la segunda parte se define la clasificación …