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31.
Mosca S Torelli GN Guerriero E Tramontana G Pomponio S Rossetti G Rotatori M 《Journal of environmental monitoring : JEM》2010,12(5):1092-1099
The Stockholm Convention on Persistent Organic Pollutants (POPs) was signed in May 2001 by 127 countries. Currently, 12 substances are regulated by the convention, and the work on finding new candidate chemicals to the convention has started. Among these 12 substances, dibenzo-p-dioxins (PCDDs), polychlorinated dibenzofurans (PCDFs) and polychlorinated biphenyls (PCBs) are the objects of this study. There are no European standard methods for the simultaneous determination of these microorganic compounds, together with polycyclic aromatic hydrocarbons (PAHs) in ambient air--they must be referred to three different methods developed by the U.S. Environmental Protection Agency (EPA). The quali-quantitative analysis of these microorganic pollutants is an important challenge due to the low concentrations at which they may be present. In this study, the development of a simplified, alternative, fast and affordable sampling method for the determination of PAHs, PCDDs, PCDFs and PCBs in ambient air was performed. The sampling time was extended from 24 h to 7 d in order to enrich the sample, to fall within the instrumental limits of detection and to reduce the number of samples to be processed and, therefore, errors that may arise. First of all, experiments with labelled standards were conducted in the research area of Montelibretti (rural station, which is sited about 20 km northeast of Rome), with the purpose of optimizing sampling efficiency. Finally, the method was applied to the analysis of these compounds in the air of a suburban area with small industrial plants in order to evaluate the feasibility of the proposed sampling method system, by comparing concentrations of native compounds acquired during simultaneous daily and weekly sampling. 相似文献
32.
International institutions, understood as sets of rules contained in international agreements, are aimed at orienting national
governments towards specific policy options. Nevertheless, they can determine a change in national policies and practices
only if states are willing and capable of incorporating international obligations into their national legislations and ensuring
their application and enforcement in areas that follow completely under national jurisdiction. The establishment of marine
protected areas promoted by international agreements as a tool for the protection of marine resources represents an interesting
case for revealing the complex interactions between international institutions and national actors. Particularly, the establishment
of these areas in Senegal shows the salience of domestic constellations of actors who may support or undercut national commitments
to international regimes: political elites, bureaucracies, the general public and target groups. By anchoring the empirical
analysis to an actor-centred institutionalist perspective, the article explains how dynamic constellations of actors can distort
the penetration of international objectives in the national policy framework. Different constellations of national actors
can indeed bend international institutions at different moments: during the formulation of a new law in line with international
obligations; in the definition of its implementation framework; and in the enforcement of national policies. 相似文献
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34.
Arturs Purvins Heinz Wilkening Gianluca Fulli Evangelos Tzimas Gianni Celli Susanna Mocci Fabrizio Pilo Sergio Tedde 《Journal of Cleaner Production》2011,19(17-18):1909-1916
This article assesses the impact of extensive deployment of indigenous and external renewable energy sources on a local electricity system (Sardinia Island) and discusses the main challenges faced by the European power grids in integrating high shares of renewable-based generation technologies. It presents the 2030 scenarios for the Sardinian power system and the results of steady-state analyses in extreme (renewable) generation and consumption conditions. These results are eventually combined with the assessment of key technology development trends to explain how this can affect the development of a European supergrid. In general, the article stresses that rendering the bulk-power system capable of accommodating high renewable energy penetration not only requires reinforcing the electricity highways but also demands carefully planning the architecture of and the interface with regional power systems. 相似文献
35.
Martina Milanese Antonio Sarà Gianluca Sarà Jason H. Murray 《Chemistry and Ecology》2013,29(2):95-105
This commentary describes a gap in the qualitative and quantitative knowledge of the provision of benefits to humans from the intertidal ecosystems of the Mediterranean and offers a framework for quantification of the benefits provided by these systems. The identification of such benefits, understanding their spatial distribution and their subsequent quantification will be critical to the design of policy responses to future climate change, sea level rise and seawater acidification. A baseline understanding of the current state of ecosystem functions, as well as of the provision of related ecosystem services, is therefore needed. Further, researchers must strive to generate forecasts of the changes in these functions and services conditional on policy responses and the range of expectations for climate change. 相似文献
36.
We examined the role of social embeddedness in creating positive perceptions of organizational support among managerial and staff employees (n = 72) of a large manufacturing firm. We operationalized social embeddedness as the size, density, and quality of employees' networks of multiplex, reciprocated exchange relationships with colleagues. After controlling for support from supervisors and upper management, we found all three aspects of social embeddedness to be associated with perceived organizational support (POS). This research suggests that in addition to the top‐down influence of the organizational hierarchy, POS results from the organizational community within which employees are embedded through their social network in the workplace. Copyright © 2011 John Wiley & Sons, Ltd. 相似文献
37.
Gorrasi Giuliana Viscusi Gianluca Gerardi Carmela Lamberti Elena Giovinazzo Giovanna 《Journal of Polymers and the Environment》2022,30(9):3609-3621
Journal of Polymers and the Environment - Grape pomace, as by-product of wine making, is a source of polyphenols, fibers, fatty acids, metals, and organic acids, which could be used as raw... 相似文献
38.
D’Adamo Idiano Lupi Gianluca Morone Piergiuseppe Settembre-Blundo Davide 《Environmental science and pollution research international》2022,29(31):46620-46633
Environmental Science and Pollution Research - The transition to a circular economy is a key concern for the fashion industry. The emerging second-hand market is a practice that could enable the... 相似文献