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Helenice Rodrigues da Silva é doutora em História pela Universidade de Paris X(Nanterre). Dentre vários títulos é autora dos livros Texte, action et histoire -refléxions sur le phénomene de I' engagement, Paris, L'Harmattan, 1995 e Fragmentos da História Intelectual -entre questionamentos e perspectivas, Campinas, Papirus, 2002. Coordenou seminários na École des Hautes Etudes em Sciences Sociales e trabalhou como pesquisadora-associada do Centre National de la Recherche Scientifique, França. Atualmente, é professora do Departamento de História da Universidade Federal do Paraná. De Paris,onde desenvolve pesquisa de pós-doutoramento junto ao Institut d'Histoire du Temps Présent (CNRS) concedeu esta entrevista a Mediações.

Huey Copeland's Bound to Appear: Art, Slavery, and the Site of Blackness in Multicultural America can be categorized as the most recent in a long line of scholarly investigations into what has come to be called "the afterlife of slavery"—the general preoccupation with establishing the authority of the slave past in contemporary black life—and the first to explore that subject in the field of contemporary art. Best notes that when we reverse the thesis of slavery's afterlife and reconceptualize it as the basis for a historiography of slavery, we can tend also to hypostatize aspects of the slave past as missing from the visual field and in need of recovery—as, in one way of phrasing it, bound to appear. Best contends that this last entailment is not always tenable or justified by the historical record, and he invites us to consider other ways of predicating of loss.

Fuel Bioethanol The overview on fuel bioethanol take into account the ecological aspects, the production, the use and regulatorys. In the EU, transportations use the 35% of the energy mainly as liquid fuels, recently, it has been planned to introduce 10% of biofuel up to 2020 in order to reduce CO2 emission and oil dependence. Actually, bioethanol is the most used biofuel and it is that who needs the smallest investments to adjust infrastructures and vehicles. The only efficient crop to produce ethanol is sugarcane but research is investigating spontaneous grasses and agricultural wastes. Forecasts on bioethanol market is grow leaving out of consideration the governmental acts that favours its diffusion. ; Questa panoramica sul bioetanolo come carburante considera gli aspetti ecologici, la produzione, il consumo e le normative. Le previsioni sul mercato del bioetanolo sono in crescita a prescindere dagli intereventi legislativi che comunque ne favoriscono la diffusione.