Abstract
With an increasing interest in genre-based research and curricula, it is important to integrate descriptions of both the top-down and bottom-up characteristics of language that help identify one genre as being distinct from another. It has been suggested that one component which realises generic distinctiveness is the textual metafunction of language, Halliday's notion of theme. In order to explore their potential for within-text structuring in scientific discourse, marked themes in a corpus of research articles (RAs) were analysed and described. Results indicate that thematic flow can be predicted on the basis of the rhetorical goals inherent in each section of RA discourse.
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