196,042 research outputs found
AGRI-FOOD, PLASTIC AND SUSTAINABILITY
No full textThe new trajectories established by Agenda 2030 for the achievement of the sustainability of individual and collective well-being
impose to look at the socio-economic and environmental repercussions deriving from the use of plastics in the agri-food sector.
Starting from an examination of this use and considering the strategies put in place by the European Union, this paper aims to
assess whether, from a sustainability point of view, it must now be considered a threat to be avoided or an opportunity to be seized
for an agri-food sustainability oriented. More specifically, the paper looks at the New Plastics Economy, a project that should make
the economic system more compatible with the needs of the ecosystem and that applies the principles of the circular economy, to
solicit local policy makers to reflect on the development strategies able to make companies and consumers more responsible in
relation to the use of plastic
Inflation-Based Fiscal Consolidation: Does Speed Matter?
No full textThe potential role that a permanent increase in the inflation target might have in contributing to debt consolidation has rarely been covered in the literature on the link
between inflation and public debt. This paper thus investigates under what conditions
a higher inflation target might lead to a reduction in the public debt-to-GDP ratio,
in a deterministic environment of a TANK model where monetary and fiscal authorities actively operate. Analysing the economic mechanisms involved led to two key
results. Higher inflation has opposite effects on public debt in the short and long term.
Initially, a rise in the nominal interest rate induces savers to invest relatively more
in bonds. In contrast, once the inflation rate reaches higher values, lower wages and
rates of return impact on savers who reduce investments in bonds. The second finding
is that fiscal consolidation through higher inflation is far from obvious. Overall, the
long-term negative effects of higher inflation on output determine increases in fiscal
deficits. Moreover, a slower inflation adjustment path influences households’ expectations, leading to increases in the debt-to-GDP ratio rather than decreases in the short
term. In light of that, today more than ever, a traditional fiscal policy aimed at reducing the government’s deficit would be needed. Furthermore, revising the monetary policy strategy to increase the inflation target would not be recommended due to the potentially negative effects higher inflation could have on the economy
T-g and FTIR of (2.5-x)CaO. x/3M2O3. 2SiO(2) (M = Y, La, In, Al, Ga) glasses
No full textA comparative study of the effect of substituting oxides of (M = Y, La, In, Al, Ga) to CaO in 2.5CaO2SiO(2) glass in the narrow compositional range of the binary CaO-SiO2 system in which homogeneous glasses can be obtained (0.4 < CaO/(CaO + SiO2) < 0.55). A plot of glass transformation temperature, T-g, vs the ionic field strength, Z/r(2), where Z and r are the charge and the radius of the cation, is useful in discussing the role of oxides in the glassy structure. It is hypothesized that, in the composition range, studied Al2O3 and Ga2O3 act as network forming oxides, while La2O3, Y2O3 and In2O3 act as network modifying oxides. FTIR spectra agree with this hypothesis and with the expectations based on the criteria reported in the literature, in particular with the one proposed by McMillan that the network modifier cations have an ionic field strength Z/r(2) < 5 A(-2). (C) 1999 Elsevier Science B.V. All rights reserved
Il Lago Fusaro: monitoraggio e studio comparativo di indici trofici
No full textObiettivo dello studio è ricostruire, a partire dalle informazioni preliminari e dai risultati ottenuti in seguito alla campagna di monitoraggio, un quadro generale che ci permetta di valutare il grado di impatto ambientale sul Lago Fusaro. Il programma di monitoraggio si è svolto a partire da marzo 2002 fino a marzo 2003 attraverso le analisi chimico-fisiche di campioni d’acqua e di mitili.
I campioni d’acqua sono stati prelevati in 6 stazioni di prelievo, con una frequenza mensile. Allo scopo di rilevare nelle acque la presenza di alcuni microinquinanti persistenti che si bioconcentrano nei tessuti degli organismi, portando al grave fenomeno della biomagnificazione, è stato utilizzata una popolazione di Mytilus Galloprovincialis (Lamk) come indicatore biologico di inquinamento
Effect of the substitution of M2O3 (M = La, Y, In, Ga, Al) for CaO on the bioactivity of 2.5CaO center dot 2SiO(2) glass
No full textGlasses were prepared whose compositions are defined by the following general formula: (2.5-x)CaO .x/3M(2)O(3). 2SiO(2) (0 less than or equal to x less than or equal to 0.6) (M = Ga, Al, In). Their bioactivity Was Studied "in vitro" by soaking the glasses in a simulated body fluid (SBF) The consequent formation of calcium phosphate laver was studied by means of electron microscopy (EM) equipped with an energy-dispersive system (EDS) for elemental analysis and Infrared (IR) spectroscopy. The results are compared to the literature relative to the Substitution of La2O3 and Y2O3 for CaO. It is observed that. in general, the substitution of M2O3 for CaO in the binary CaO-SiO2 glass composition progressively reduces the ability to form a calcium phosphate layer on the surfaces exposed to simulated body fluid (SBF). The composition limit can be related to the ionic field strength of the substituting cation and to the CaO content of the base glass. According to the mechanism reported in the literature a silica gel-like surface layer initially forms on the surfaces exposed to SBF. The observed results can be attributed to the effect of the Substitution of M2O3 for CaO on the acidic properties of the silanolic groups. (C) 2001 Elsevier Science Ltd. All rights reserved
IMPACT OF MODERN LAND USE AND URBANIZATION THROUGH TECHNOLOGIES: A CHALLENGE TO CAMPANIA REGION
No full text- …
