Search results for "TRES"
showing 10 items of 6927 documents
Architetture lignee per lo spettacolo tra XVII e XVIII secolo a Palermo (Theatral wooden architectures in Palermo during XVIII and XIX centuries)
2016
La realizzazione di architetture per lo spettacolo, stabili o temporanee, interamente realizzate in legno fu una consuetudine sette-ottocentesca diffusa sia in molte grandi città europee sia in centri di minori. Anche a Palermo anfiteatri, teatri-circo e casotti occuparono anche a lungo le piazze del centro storico e grandi edifici "contenitori" pubblici o di facoltosi cittadini, ospitando giochi equestri, spettacoli con animali esotici. La connotazione temporanea suggeriva l'uso del legno a costruttori e progettisti: realizzate rapidamente, potevano con semplicità essere smontate e riproposte altrove. Sebbene si trattasse di "architetture provvisorie", era necessario che fossero non solo s…
Two-Perfect Fluid Interpretation of an Energy Tensor
1990
The paper contains the necessary and sufficient conditions for a given energy tensor to be interpreted as a sum of two perfect fluids. Given a tensor of this class, the decomposition in two perfect fluids (which is determined up to a couple of real functions) is obtained.
Direct NMR evidence for the dissociation of sulfur-dioxide-bound acetaldehyde under acidic conditions: Impact on wines oxidative stability
2021
Abstract SO2 reaction with electrophilic species present in wine, including in particular carbonyl compounds, is responsible for the reduction of its protective effect during wine aging. In the present study, direct 1H NMR profiling used to monitor the reactivity of SO2 with acetaldehyde under wine-like oxidation conditions. The dissociation of acetaldehyde bound SO2 was evidenced suggesting that released free SO2 can further act as an antioxidant. EPR and DPPH assays showed an increasing antioxidant capacity of wine with the increase in the concentration of acetaldehyde sulfonate. The presence of acetaldehyde sulfonate in wines was correlated with the overall antioxidant activity of wines.…
Validation and biochemical characterisation of beneficial argan oil treatment in biomass propagation for industrial active dry yeast production
2019
Abstract Biomass propagation for the production of active dry yeasts (ADY) is an economically important industrial process where cellular oxidative stress significantly limits yield and fermentative capacity in the final product. Oxidative stress affects macromolecular cell components, such as lipid and proteins, thus impairing many different cellular processes. Its detrimental effect is prevented and alleviated by complex signalling, detoxifying and protein protecting systems, which can be induced by antioxidant treatments. Here we validate the general beneficial effect of argan oil treatment in bench-top simulations of industrial yeast biomass propagation as an effective technological str…
Adaptive evolution of wine yeast.
2003
Abstract Alcoholic fermentation is one of the main phases in wine production. It is usually conducted by yeasts belonging to the species Saccharomyces cerevisiae. Industrial S. cerevisiae strains are highly specialized organisms, which have evolved to utilize to their full potential the different environments or ecological niches. So, during the alcoholic fermentation, the yeast has been adapted to different kinds of stress conditions; this adaptation is call “domestication”. In this review, we describe the different mechanisms involved in the adaptive evolution of wine yeast strains.
Wee1 inhibition potentiates Wip1-dependent p53-negative tumor cell death during chemotherapy
2016
AbstractInactivation of p53 found in more than half of human cancers is often associated with increased tumor resistance to anti-cancer therapy. We have previously shown that overexpression of the phosphatase Wip1 in p53-negative tumors sensitizes them to chemotherapeutic agents, while protecting normal tissues from the side effects of anti-cancer treatment. In this study, we decided to search for kinases that prevent Wip1-mediated sensitization of cancer cells, thereby interfering with efficacy of genotoxic anti-cancer drugs. To this end, we performed a flow cytometry-based screening in order to identify kinases that regulated the levels of γH2AX, which were used as readout. Another criter…
Work stressors and creativity
2013
Work stressors, conflict asymmetries and dissatisfaction with the status quo are all negative factors which workers today are subjected to. Unfortunately, these situations occur more often than companies would want. However, negative results, despite what might be expected, do not always follow in the performances of affected employees. In this paper, through a theoretical review, it is shown under what circumstances these stressors can actually increase creative performance. Additionally, the moderation role carried out by emotional intelligence and job control is analyzed. Conclusions and future research lines are presented.
Experimental determination of mode I fracture parameters in orthotropic materials by means of Digital Image Correlation
2020
Abstract The mode I fracture parameters for an orthotropic body are directly calculated from full-field deformation measurements provided by Digital Image Correlation (DIC). Three complementary and direct approaches are evaluated and compared: (i) the determination of the Stress Intensity Factor (SIF) by fitting the displacement field using the analytical expression proposed by Lekhnitskii; (ii) the determination of the J-Integral by using the Energy Domain Integral (EDI) formulation on the raw DIC data; and (iii) the calculation of the J-Integral using the EDI approach on the displacement data fitted using Lekhnitskii’s formulation. A comparative experimental study is performed by testing …
On the FE codes capability for tool temperature calculation in machining processes
2006
Abstract The applications of numerical simulation to machining processes have been more and more growing in the last years: today a quite effective predictive capability has been reached, at least as far as global cutting variables (for instance cutting forces) are concerned. On the other hand, the capability to predict local cutting variables (i.e. pressure on the tool, temperature distribution, residual stresses in the machined surface) has to be heavily improved and verified. At the same time, effective experimental procedures for validating numerical results have to be developed. In this work two different approaches were implemented for temperature measuring: a thermocouple based appro…
A COMPARISON BETWEEN COMBUSTION PHASE INDICATORS FOR OPTIMAL SPARK TIMING
2008
The closed-loop control of internal combustion engine spark timing may be accomplished by means of a combustion phase indicator, i.e., a parameter, derived from in-cylinder pressure analysis, whose variation is mainly referable to combustion phase shift and assumes a fixed reference value under optimal spark timing operation. The aim of the present work is a comparison between different combustion phase indicators, focusing on the performance attainable by a feedback spark timing control, which uses the indicator as pilot variable. An extensive experimental investigation has been carried out, verifying the relationship between indicators’ optimal values and the main engine running parameter…