Search results for " STRESS"

TOXICITY OF B-N-OXALYLAMINO-L-ALANINE ANDB-N-METHYLAMINO-L-ALANINE IN NIH3T3 CELLS IS MEDIATED BY INHIBITIONOF THE XC¯ ANTIPORTER

2012

Beta-N-oxalylamino-L-alanine (BOAA) and beta-N-methylamino-L-alanine (BMAA) are two non-protein amino acids reported to induce neuronal degeneration. They have been involved in the pathogenesis of rare motor neuron diseases, as neurolathyrism or the ALS-Parkinson-Dementia complex of Guam. The mechanisms by which BOAA and BMAA toxicity is explicated is still unknown, but there is evidence that it might involve the inhibition of Xc¯ antiporter, that is the rate-limiting transporter of the synthesis of intracellular glutathione. In the present study, we investigated the mechanisms of BOAA and BMAA toxicity in the non-neuronal NIH3T3 cells. First, we treated NIH3T3 cells with BOAA or BMAA at di…

MECCANISMI DI INVECCHIAMENTO DELLE CELLULE EPITELIALI DELLE VIE AEREE

Latitudinal- and local-scale variations in a rocky intertidal interaction web

2015

Natural assemblages are structured by a complex combination of positive and negative interactions, and the relative importance of each interaction can vary across spatial scales. By using a simple interaction web (barnacles-grazers-microphytobenthos) in a rocky intertidal system, we tested the hypothesis that the relative strength of positive and negative interactions would vary as a function of different environmental stress between 2 latitudinal levels and local environmental conditions. We manipulated the cover of barnacles and the presence of limpets at 2 sites in northern and southern Italy and non-destructively examined the response of microphyto - benthos (MPB) (photosynthetic biomas…

Some aspects regarding the static behavior of basalt in the machine building industry

2017

Basalt is a material available in big quantities in nature. It has a low price and can be used in various domains. It can be relatively easily extracted from natural deposits and processed by means of melting. Melted and recrystallized basalt has demonstrated promising behavior with regards of its use in manufacturing, as reported in the literature. This work aims to present some aspects regarding the opportunity of using basalt in manufacturing the subassemblies of machine-tools. The research was made using grey cast iron and steel parts as reference for a comparative study. The researches presented in this work were focused on analyzing the behavior of basalt parts submitted to static str…

Does a positive appraisal style work in all stressful situations and for all individuals?

2015

AbstractKalisch et al. posit that a positive appraisal style is the key to resilience. I will argue instead that the adaptiveness of a particular emotion-regulation strategy is determined by contextual factors. Hence, a positive appraisal style might not always result in positive consequences and is most likely not the only mediator of resilience.

Recurring sequences of multimodal non-verbal and verbal communication during a human psycho-social stress test: A temporal pattern analysis

2020

Abstract Background The Trier Social Stress Test (TSST) is a widely used protocol to study human psycho-social stress responses. Quantitative reports of non-verbal behaviors have been carried out by means of the Ethological Coding System for Interviews (ECSI). However, no data have described whether and how non-verbal and verbal behaviors take part in the composition of multimodal sequences of communication during the test. Method Five non-verbal ECSI categories and four verbal behaviors related with communication were included in the Ethogram. A focal sampling was employed to ensure a high temporal resolution of the behavioral annotation. T-Pattern Analysis was employed to detect statistic…

Short-term e-cigarette vapour exposure causes vascular oxidative stress and dysfunction: evidence for a close connection to brain damage and a key ro…

2019

Abstract Aims Electronic (e)-cigarettes have been marketed as a ‘healthy’ alternative to traditional combustible cigarettes and as an effective method of smoking cessation. There are, however, a paucity of data to support these claims. In fact, e-cigarettes are implicated in endothelial dysfunction and oxidative stress in the vasculature and the lungs. The mechanisms underlying these side effects remain unclear. Here, we investigated the effects of e-cigarette vapour on vascular function in smokers and experimental animals to determine the underlying mechanisms. Methods and results Acute e-cigarette smoking produced a marked impairment of endothelial function in chronic smokers determined b…

Il benessere organizzativo degli operatori penitenziari: i cambiamenti normativi e la trasformazione dei ruoli

2017

LE EMOZIONI NELLE ORGANIZZAZIONI: POSSIAMO DAVVERO IGNORARLE?

2014

Introduzione. Questo studio esplora l'importanza delle esperienze affettive dei lavoratori nel settore dei servizi, partendo dall’ipotesi di ricerca: come possono le esperienze affettive sul luogo di lavoro contribuire a spiegare gli esiti dello stress lavorativo? L’Affective Events Theory (AET) costituisce il fondamento teorico di partenza. Obiettivi e Metodi. In particolare, l’obiettivo principale del presente studio è stato quello di indagare il ruolo che gli stati affetti positivi e negativi sperimentati sul luogo di lavoro giocano come mediatori della relazione tra le caratteristiche del lavoro e gli esiti del processo dello stress lavorativo. A partire dal modello JD-R, è stato testat…

Il benessere aziendale percepito: tra senso di appartenenza e soddisfazione lavorativa

2013

Il presente contributo analizza alcune variabili ritenute dalla letteratura sull’argomento componenti fondamentali del benessere aziendale: l’orientamento al team, il senso di appartenenza aziendale, il senso di efficacia organizzativa, l’identificazione con l’azienda e la soddisfazione lavorativa. I partecipanti alla ricerca sono 58 dirigenti di aziende siciliane. I dati mostrano come il senso di appartenenza all’azienda sia centrale, essendo l’unica variabile tra quelle indagate che influisce sulla soddisfazione lavorativa. Inoltre, il senso di efficacia organizzativa, ossia il percepire che la propria azienda e in grado di affrontare le difficolta e di raggiungere i risultati attesi e fo…