Arguing that new feminist materialist work has insufficiently attended to how gender is differently materialized and embodied in practices with non-human others, this article examines ethnographically what genderings come to matter in the knowledge-making practices of mass spectrometry and peer review in a Czech research laboratory. The article returns to Donna Haraway's analytics of the 'apparatus of bodily production' and its extension by Karen Barad as a productive device for tracing the situational making and unmaking of gender in specific human-technology assemblages and the sedimenting histories of such intra-actions.
Through a triple movement of disassembling, contextualizing and reassembling particular embodiments, the author brings unstable, implicit and absent genderings, and their affective textures, affordances and valuations to the fore, including the corporeal orientations associated with enterprising adrenalin-driven masculinity and denigrated forms of embodiment such as shame and defeat. The article shows how these (de)genderings render present tensions and exclusions in prevailing apparatuses of knowledge production and pose questions of responsibility.