Table 2.

Definitions of the photochemical parameters.

Symbols	Definitions	Units
$k_1$	Photobleaching rate	$1/\mu \mathrm{M}·\mathrm{s}$
$k_2$	Reaction rate of ${{}^3\mathrm{O}}_2$ with T	$1/\mu \mathrm{M}·\mathrm{s}$
$k_3$	Rate of $S_1$ to $S_0$	$1/\mathrm{s}$
$k_4$	Rate of T to $S_0$	$1/\mathrm{s}$
$k_5$	Rate of $S_1$ to T	$1/\mathrm{s}$
$k_6$	Rate of ${{}^1\mathrm{O}}_2$ to ${{}^3\mathrm{O}}_2$	$1/\mathrm{s}$
$k_7$	React. rate of ${{}^1\mathrm{O}}_2$ and tissue	$1/\mu \mathrm{M}·\mathrm{s}$
$\epsilon$	Extinction coefficient	${\mathrm{cm}}^{-1}\mu {\mathrm{M}}^{-1}$
$g$	Maximum oxygen supply rate	$\mu \mathrm{M}/\mathrm{s}$
$[S_0]$	Ground state sensitizer concentration	$\mu \mathrm{M}$
$[S_1]$	Singlet excited state sensitizer concentration	$\mu \mathrm{M}$
$[T]$	Triplet excited state sensitizer concentration	$\mu \mathrm{M}$
$[{{}^3\mathrm{O}}_2]$	Triplet ground state oxygen concentration	$\mu \mathrm{M}$
$[{{}^1\mathrm{O}}_2]$	Singlet excited state oxygen concentration	$\mu \mathrm{M}$
$S_{\mathrm{\Delta }}$	Fraction $[{{}^1\mathrm{O}}_2]$ from $[T]$ and $[{{}^3\mathrm{O}}_2]$ reaction	Dimensionless