This action is lost, however, when foods are cooked or heat processed destroying the natural catalytic activity of food digestive enzymes. (appliedhealth.com)
In the presence of excess vitamin C, which provides electrons to the system, it shows remarkable catalytic activity in water, the best obtained to date with cadmium - free quantum dots. (sciencedaily.com)
Although grain - boundary density has previously been correlated with catalytic activity for some reactions, direct evidence that grain boundaries create surfaces with enhanced activity is lacking. (science.sciencemag.org)