Search results for "SELE"

Rainwater-induced leaching of selenium, arsenic and vanadium from Etnean volcanic soils

2009

Active volcanoes emit considerable amounts of contaminants such as As, Se and V. Mount Etna is the biggest volcano of Europe and an excellent geochemical site to study water-soil processes. Due to its volcanic activity, the rainwater has a strong compositional gradient, both in time and space. At present, the behaviour of trace elements in the soils around Mt Etna is poorly understood. To determine the influence of the rainwater pH on the potential mobilization of geogenic pollutants, batch experiments have been performed with synthetic rainwater for 25 soils collected along the flanks of the volcano. Our results show that: i) The maximum concentrations in the leaching solutions are higher …

SELVICOLTURA ALPINA E SELVICOLTURA APPENNINICA: ELEMENTI DI CONTATTO E DI DIFFERENZIAZIONE

2009

Riassunto Il rapporto tra boschi e popolazioni locali sulle Alpi come sugli Appennini, seppur in momenti storici differenti, è stato caratterizzato dalla distruzione e sfruttamento intensivo, protrattisi fino alla metà del secolo scorso, cui hanno fatto seguito la ricostituzione sia mediante rimboschimenti sia con il miglioramento dei boschi esistenti. Partendo dai presupposti sui quali si è imperniata l’attività forestale che ha caratterizzato, nel corso degli ultimi cinquant’anni, l’approccio selvicolturale nei due contesti e da una puntuale e documentata analisi, nel lavoro vengono evidenziati gli elementi di differenziazione tra la selvicoltura naturalistica applicata in ambiente alpino…

Serenoa repens, lycopene and selenium versus tamsulosin for the treatment of LUTS/BPH. An Italian multicenter double-blinded randomized study between…

2014

Kin selection in interactions between gametes: Gamete competition, gamete limitation, and sex allocation

2023

Kin selection on one hand, and gamete interactions in post-ejaculatory sexual selection on the other are two major research themes that have risen to prominence over the past half century and have simultaneously developed into central fields of research in evolutionary biology. There is a natural connection between the two: when gametes interact with each other, very commonly many of them originate from the same parent and are thus siblings. For example, sperm competition will almost always involve competition between sibling gametes even if the interacting parents are not related to each other. If parents are related to each other, the relatedness between gametes increases further. Here we…

Fluctuating asymmetry and sexual performance in the drumming wolf spider Hygrolycosa rubrofasciata

2003

Recently, there has been much interest in estimating fluctuating asymmetry (FA) of morphological traits as a short-cut measure of individual quality. FA deals with small differences around the symmetry value of zero. Thus, measurement error is often relatively large. However, repeated measurements. and large sample sizes allow reliable estimates of FA that can be corrected for errors. The purpose of this study was two-fold: at the biological level, we examined with a large sample size (N = 804) whether pedipalp FA could be used as a short-cut measure, of individual quality in the wolf spider Hygrolycosa rubrofasciata. This was done by estimating how strongly FA correlates with male sexual p…

Phonon Coupling Properties of Non Bridging Oxygen Hole Centers at a Silica Surface Probed by Site-Selective Luminescence Excitation

2008

Looking at social motivation to assess meat producing poultry adaptation to rearing conditions

2013

International audience

Friends, academic achievement, and school engagement during adolescence : A social network approach to peer influence and selection effects

2018

Abstract Peers become increasingly important socializing agents for academic behaviors and attitudes during adolescence. This study investigated peer influence and selection effects on adolescents' emotional (i.e., flow in schoolwork, school burnout, school value), cognitive (i.e., school effort), and behavioral (i.e., truancy) engagement in school. A social network approach was used to examine students of post-comprehensive education in Finland (N = 1419; mean age = 16). Students were asked to nominate peers to generate peer networks and to describe their own school engagement at two time points (one year apart). Network analyses revealed that the degree to which peer influence and selecti…

Intra- and inter-specific social selection of vigilance and defense phenotypes in breeding colonies of lesser kestrels and jackdaws

2012

Long-Term Educational Sustainability: Educational Innovation in Social Vulnerability Contexts

2017

This paper investigates the behavior of children from low socioeconomic status families and examines the effects of a socioemotional education program on aggression in children. The results of the program are compared according to the children’s gender and age, the family structure, the parents’ educational attainment, and social status. The results show that applying socioemotional education programs reduces children’s aggression and encourages positive development during adolescence. This positive development fosters open, expressive behavior.