Circulation: from the passage zone to the ambiance of interpenetrations of meanings 173 gated, in an intense and broad way, libraries and training of researchers on communication problems – however, always based on linear and causalist principles. It was only in later temporalities, in studies about the media based on post-functionalist orientations, that the issue of the unfathomability of circulation is faced, already in the sce- nario of transit from “media society” to the “society undergoing mediatization.” In this scenario, technologies transformed into media generate new ways of functioning for communication practices and the links between institutions and social actors. This gives rise to interchangeabilities that weaken the interac- tional processes managed, until then, by mediational structures. According to the new dynamics of complex processes, mediatization is carried out through the work of circulation. This is manifested through the intertwining of contacts between the spheres of production and reception of journalistic discourses, pointing to the nature of another type of enunciative work on newsworthiness. It is an emerging landscape, also indicating transformations in the conditions of journalistic discourse production, its identity, and the relationship of its operators with the col- lectives. Also noteworthy are the transformations in the communicational “architecture” of the journalistic environment, as well as the effects of grammars of various natures on the strate- gies for newsworthiness production. These aspects point to the displacement of journalistic discourse, going from a “mediation zone” to other modalities of contact between different social systems. For many years, circulation was considered a “dead zone”, or as other designations would have it, a “passage zone”, through which the traffic of messages from the emission scope to consumer universes would occur. Techno-media structures were highlighted as mediating instances, executing the inter- mediation of messages between the mass-media (journalistic) environments and audiences. But the growing mediatization gives rise to profound transformations in techno-communicational processes, causing the weakening of mediational matrices to the extent that interactions between institutions and social actors begin to occur di-
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