Search results for "REF"
showing 10 items of 8690 documents
Aspetti microbiologici del latte crudo mantenuto a diverse temperature per la produzione di Grana Trentino
2008
Assessment of the Inter-Batch Variability of Microstructure Parameters in Topical Semisolids and Impact on the Demonstration of Equivalence
2019
Demonstration of similar microstructure is essential for demonstrating the equivalence of generic topical products since the microstructure of semisolids may affect the drug release. The objective of this study was to compare the microstructure-defining physical parameters of different batches of a reference ointment containing calcipotriol and betamethasone (Daivobet 50 µ
Determination of metal concentrations in certified plastic reference materials after small-size autoclave and microwave-assisted digestion followed w…
2017
Abstract The digestion methods for the determination of As, Cd, Cr, Pb, Sb, Sn and Zn concentrations in plastic samples using microwave-assisted digestion (MW-AD) and small-size autoclave digestion was developed. The certified polyethylene, polypropylene, polyvinyl chloride and acrylonitrile butadiene styrene certified reference materials were used in order to find digestion method working properly for several sample matrices. Efficiency of the digestion methods was evaluated by analyzing the residual carbon in digests by TOC analyzer. MW-AD using a mixture of 7 mL of HNO 3 and 3 mL of H 2 O 2 as a digestion solution resulted in excellent recoveries for As, Cd, Pb, Sb and Zn, and were in th…
The effect of prior information on musical preference rating how our musical preference is shaped by prior information in an online environment
2009
Revista electrónica de investigación y evaluación educativa
2018
La reciente crisis migratoria ha multiplicado el número de personas en edad escolar que migran forzosamente. La integración de los menores en los países de acogida exige no solo su escolarización sino una inclinación de la comunidad educativa para aceptar dicha realidad y gestionar críticamente las políticas europeas migratorias. A nivel europeo hay un creciente rechazo hacia el fenómeno migratorio y hacia las políticas europeas. El estudio analiza las actitudes hacia los refugiados mediante la percepción de amenaza real y simbólica y las reacciones afectivas que los futuros profesores experimentan. Además, explora en qué medida las actitudes hacia los refugiados se relacionan con una ciuda…
Single Event Transients and Pulse Quenching Effects in Bandgap Reference Topologies for Space Applications
2016
An architectural performance comparison of bandgap voltage reference variants, designed in a $0.18~\mu \text {m}$ CMOS process, is performed with respect to single event transients. These are commonly induced in microelectronics in the space radiation environment. Heavy ion tests (Silicon, Krypton, Xenon) are used to explore the analog single-event transients and have revealed pulse quenching mechanisms in analogue circuits. The different topologies are compared, in terms of cross-section, pulse duration and pulse amplitude. The measured results, and the explanations behind the findings, reveal important guidelines for designing analog integrated circuits, which are intended for space appli…
Refreigerated storage of raw milk for Trentingrana production: microbiological effects
2008
How do gender, Internet activity and learning beliefs predict sixth-grade students’ self-efficacy beliefs in and attitudes towards online inquiry?
2021
Today’s students search, evaluate and actively use Web information in their school assignments, that is, they conduct an online inquiry. This current survey study addresses sixth-grade students’ self-efficacy beliefs in and attitudes towards online inquiry, and to what extent free-time and school-related Internet activity, gender and learning beliefs explain these. The questionnaire was administered in 10 schools to 340 sixth-graders in Finland. Exploratory and confirmatory factor analyses revealed three elements of self-efficacy beliefs: self-efficacy in Web searching, the evaluation of sources and synthesising information. Furthermore, attitudes towards online inquiry loaded into two fact…
La competencia pragmática en adolescentes. Un estudio de la atenuación en actos de rechazo
2019
En el presente trabajo se ha llevado a cabo un estudio de la atenuación pragmática a partir del análisis de un corpus de muestras escritas que recogen una actividad de simulación o role-playpropuesta a estudiantes adolescentes (15-18 años): la escritura de un WhatsApp en la que se rechaza una invitación. El objetivo de este estudio es, por una parte, observar el uso que hacen los adolescentes de la estrategia pragmática de la atenuación, y, por otra, evaluar su competencia pragmática, a partir del diseño de un sistema de evaluación basado en el mayor o menor uso de la atenuación. La metodología seguida para el análisis de la atenuación se basa en la propuesta de Albelda et al. (2014), en la…
Effects of Transcranial Direct Current Stimulation on Baseline and Slope of Prefrontal Cortex Hemodynamics During a Spatial Working Memory Task
2020
Background: Transcranial direct current stimulation (tDCS) has been shown to be an inexpensive, safe, and effective way of augmenting a variety of cognitive abilities. Relatively recent advances in neuroimaging technology have provided the ability to measure brain activity concurrently during active brain stimulation rather than after stimulation. The effects on brain activity elicited by tDCS during active tDCS reported by initial studies have been somewhat conflicted and seemingly dependent on whether a behavioral improvement was observed. Objective: The current study set out to address questions regarding behavioral change, within and between-participant designs as well as differentiatin…