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. 2012 Jun 23;113(1):127–144. doi: 10.1007/s11120-012-9758-1

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© The Author(s) 2012

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Fig. 9 — Changes of effective quantum yield, Y(II), induced during 22-min illumination with 440- and 625-nm light in dilute suspensions of Chlorella (300 μg Chl/L) followed by 50-min dark-regeneration. AL was switched on 40 s after measurement of F _v/F _m (at time 0) and SP were applied every 5 min, starting 20 s after onset of AL. Use of the Script-file photoinhibition_Chl01.prg, with settings of light color and AL-intensity varied. PAR values are indicated in μmol quanta/(m² s)