Search results for "Scientific"

Current Thoughts on the Neolithisation Process of the Western Mediterranean

2017

The analysis of the Neolithisation process constitutes a recurrent theme in the scientific literature given the fundamental change for human populations implied in the transition from a hunting-fishing-gathering economy to one based on domestication and food production. Nonetheless, the majority of the regional syntheses on a European scale published to date have dealt mainly with the historical narrative of the process, focusing on discussing the Neolithisation process from a demographic and/or cultural perspective. In this respect, the work of Ammerman and Cavalli Sforza (1984) without doubt constituted a turning point in a number of aspects relevant to the study of the Neolithisation of …

Enseñar Mindfulness: Contextos de Instrucción y Pedagogía

2016

La aparición de mindfulness y su rápida diseminación en entornos clínicos obedece a diversas razones, siendo una de las más relevantes la relacionada con la pedagogía. La literatura científica ha propuesto un modelo de enseñanza de mindfulness basado en los mecanismos de eficacia, la configuración de nuevas demandas, y la aparición de diferentes contextos. El objetivo de este artículo es revisar por un lado los diferentes contextos de enseñanza de mindfulness (psicoeducativos, clínicos y espirituales), analizando las semejanzas y diferencias. A continuación se revisarán los mecanismos de eficacia (regulación de la atención, conciencia corporal, regulación emocional y cambios en la perspect…

Mineral trioxide aggregate in primary teeth pulpotomy. A systematic literature review

2009

Evidence-based dentistry is a critical evaluation, awareness of the available evidence to improve decision making about the care of individual patients and / or communities. Objective: To systematically analyze the available scientific literature on clinical and radiographic results of two materials used in pulpotomy in primary teeth: formocresol and mineral trioxide aggregate. Materials and methods: It was identified relevant publications through a search of electronic databases such as MEDLINE (Ovid) and The Cochrane Library. To be included in the review, studies had to define the material used in child patients with pulp exposure by caries or tooth-alveolar trauma. Results: Of the 21 art…

Nonclassical crystallization in vivo et in vitro (I): Process-structure-property relationships of nanogranular biominerals.

2016

A distinct nanogranular fine structure is shared by a wealth of biominerals from several species, classes and taxa. This nanoscopic organization affects the properties and behavior of the biogenic ceramic material and confers on them attributes that are essential to their function. We present a set of structure-relationship properties that are rooted in the nanogranular organization and we propose that they rest on a common pathway of formation, a colloid-driven and hence nonclassical mode of crystallization. With this common modus operandi, we reveal the most fundamental and wide spread process-structure-property relationship in biominerals. With the recent increase in our understanding of…

Misurare e pesare nella Grecia antica. Teorie storia ideologie

1998

I Greci si limitarono ad un uso pratico dei pesi e delle misure o svilupparono anche una elaborazione teorica sul pesare e misurare? A partire da questo interrogativo, vengono analizzate nel volume fonti di vario genere (letterarie, scientifiche, giuridiche, epigrafiche), collocabili in un arco di tempo che va da Omero alla tarda antichità. Attraverso una lettura filologica dei testi, si ricostruisce così il panorama di un’ampia riflessione dei Greci sul ruolo che le misure svolgono all’interno della società e sulla loro importanza nella politica, nella scienza, nell’etica: dall’invenzione dei pesi e delle misure come tappa della storia della civilizzazione umana alla loro individuazione qu…

International Union of Basic and Clinical Pharmacology. XCIV. Adhesion G Protein–Coupled Receptors

2015

The Adhesion family forms a large branch of the pharmacologically important superfamily of G protein-coupled receptors (GPCRs). As Adhesion GPCRs increasingly receive attention from a wide spectrum of biomedical fields, the Adhesion GPCR Consortium, together with the International Union of Basic and Clinical Pharmacology Committee on Receptor Nomenclature and Drug Classification, proposes a unified nomenclature for Adhesion GPCRs. The new names have ADGR as common dominator followed by a letter and a number to denote each subfamily and subtype, respectively. The new names, with old and alternative names within parentheses, are: ADGRA1 (GPR123), ADGRA2 (GPR124), ADGRA3 (GPR125), ADGRB1 (BAI1…

Non-Isothermal Mathematical Model of Wood and Paper Drying

2002

A mathematical model of wood or paper drying based on a detailed consideration of both heat and moisture transport phenomena is proposed. By averaging we express the model as a sequence of initial value problems for systems of two first order nonlinear ordinary differential equations. This mathematical model makes it possible to efficiently investigate the drying process of a thin wood plate or paper sheet for varying temperature and humidity conditions in the surroundings. In particular, we have considered the optimization of the heat regime over a series of steam-heated cylinders in a papermaking machine.

MyRIP, a novel Rab effector, enables myosin VIIa recruitment to retinal melanosomes

2002

Defects of the myosin VIIa motor protein cause deafness and retinal anomalies in humans and mice. We report on the identification of a novel myosin-VIIa-interacting protein that we have named MyRIP (myosin-VIIa- and Rab-interacting protein), since it also binds to Rab27A in a GTP-dependent manner. In the retinal pigment epithelium cells, MyRIP, myosin VIIa and Rab27A are associated with melanosomes. In transfected PC12 cells, overexpression of MyRIP was shown to interfere with the myosin VIIa tail localization. We propose that a molecular complex composed of Rab27A, MyRIP and myosin VIIa bridges retinal melanosomes to the actin cytoskeleton and thereby mediates the local trafficking of thes…

Electroslag process for better titanium deposition morphology

2018

NMR Studies of Single-File Diffusion in Unidimensional Channel Zeolites

1996

Single-file diffusion is the restricted propagation of particles that cannot pass each other. The occurrence of this phenomenon should be reflected by a change in the time dependence of the mean particle displacement in comparison with ordinary diffusion. Although this process is considered to be the rate-controlling mechanism in a large variety of processes, so far no direct evidence of this phenomenon has been provided. Diffusion measurements made with pulsed field gradient nuclear magnetic resonance (NMR) in unidimensional pore systems (zeolites AlPO4-5 and Theta-1) reflect the expected time dependence of single-file diffusion.