Heating can expose SH-groups which can act as antioxidants. Hemebound
metals may adopt a low-spin configuration, resulting in a loss of catalytic
activity (Love & Pearson, 1974). Thus, the probability of a change in the mechanism
occurring as a result of an increase in temperature is much greater in complex foods
than in simple lipid systems. Some of the reactions listed in Table 3 can become
significant at temperatures as low as 40 to 50°C. This temperature range should
therefore not be exceeded in ASLT studies for foods. The question remains as to
whether such a moderate temperature elevation alone provides a sufficient
acceleration in the oxidation rates for evaluation of shelf-life.