Numerous attempts have been made to establish a
correlation between vrG0
X and known independent
variables in terms of thermodynamic growth e¤ciencies,
and various de¢nitions of e¤ciency for aerobic
and anaerobic have been proposed (see [14,56] for a
review). However, each of these de¢nitions has
some limitations for use or su¡ers from intrinsic
problems, resulting in di¤culties for the prediction