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J Environ Manage. 2009 Jun;90(8):2746-54. doi: 10.1016/j.jenvman.2009.03.003. Epub 2009 Apr 7.

Changes in negative air ions concentration under different light intensities and development of a model to relate light intensity to directional change.

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  • 1Department of Ornamental Horticulture and Landscape Architecture, China Agricultural University, YuanMingYuan, Beijing, PR China.


The purpose of this research was to determine changes in negative air ion (NAI) concentrations produced by plants grown under different light intensities. NAI concentrations were observed and analyzed in an outdoor green space with five plant species (Aloe arborescens, Clivia miniata, Chlorophytum comosum, Opuntia brunnescens, Crassula portulacea) and A. arborescens was then grown under controlled-light conditions in an enclosed space for the subsequent light intensity experiment.

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