The Chlorella vulgaris was purchased from the University of
Waterloo Canadian Phycological Culture Centre (CPCC), formerly
known as the University of Toronto Culture Collection (UTCC). The
strain used was C. vulgaris CPCC 90 (formerly UTCC 90) collected by
Dep. IAM as C-531. Isol. R. Pratt, U.S.A., pre1946. The Spirulina
maxima was purchased from UTEX, The Culture Collection Center at
the University of Austin, Texas. The strain used was UTEX LB 2342,
which was collected from Natron Lake, Chad, in 1963.