All samples were diluted
with a 50 mM D2O phosphate buffer to a chl concentration of 15 g
Chl mL−1 in a one-cm fluorescence cuvette (QA-1000, HelmaOptik)
and excited with 450 nm milijoule pulses (3.6 ns duration) generated
by a Nd:YAG laser (Expla NT 242, Expla, Vilnius, Lithuania)
operating at a 1 kHz repetition rate.