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"ABSTRACTThe goals of the present study were to evaluate, in vitro, the staining of different composite resins submitted to different common beverages, and to compare the staining effect of each of these solutions. A total of 288 specimens were randomly divided into six groups and immersed for 4 weeks in five staining solutions represented by red wine, orange juice, coke, tea and coffee or in artificial saliva as a control group. When analyzed over a black background, mean E00 values varied from 0.8 for Venus Diamond, Saremco Microhybrid and ELS in saliva and Estelite Posterior in coke to 37.6 for Filtek Supreme in red wine. When analyzed over a white background, mean ΔE00 values varied from 0.5 for Saremco Microhybrid in saliva to 51.1 for Filtek Supreme in red wine. All materials showed significant changes in color after 4 weeks of immersion in staining solutions. Significant differences were found between the tested composite resins and also between the staining solutions."

"The book analyzes in detail the ideological and organizational changes that occurred within the broader Salafi movement after the Arab uprisings. While scholarship had long recognized the divisions within Salafism, this volume looks at the ways in which the extraordinary events of the Arab uprisings have led to a profound rethink of such divisions. Focusing on the developments that have characterized Salafi movements across a number of Arab countries, the contributors to this volume underline changes and continuities in both ideology and political praxis. Popular participation in the uprisings forced Salafism to contend with the rise of peoples power and different movements chose different paths to respond to such challenges. In particular, the volume focuses on what can be termed increased politicization on the part of Salafis across the region as a response to the uprisings. While traditional Salafism shied away from institutional politics and organized forms of social and political participation, the uprisings saw the emergence of parties and movements willing to sacrifice tradition and engage with and through political institutions."