For 36 hours, while following these diets, the subjects stayed in respiration chambers so that the team could measure their energy expenditure, hunger levels and macronutrient use. (blog.nkdnutrition.com)
Celis et al., 2017 combined six years of eddy covariance flux tower data and soil respiration chambers and found that a moist tundra site was a source of carbon to the atmosphere, but much of the net source arises from the slow, but continuous emissions in winter. (eos.org)
Methane produced from 35 Aberdeen - Angus and 33 Limousin cross steers was measured in respiration chambers. (ccacoalition.org)