These three main transition series are included in the set of 30 elements often called the d-block transition metals.
Average values of (a) main transition temperature (Tm), (b) width at half-height (T1/2) and (c) enthalpy change (ΔH).
Conventionally, the main transition carbide is described as epsilon carbide, with a composition of approximately Fe2.4C.
These three main transition series are included in the set of 30 elements often called the d-block transition elements.
Overall, KE is the most accurate method to determine this main transition.
All three fatty acids DHA, EPA and OA exhibited fluidifying properties when added to the DPPC bilayers, decreasing the main transition temperature.
All three free fatty acids caused in addition a broadening of the DPPC main transition endotherm, an effect that increased in the order OA < EPA < DHA.
Without exception, the elements of the main transition series (i.e., excluding the lanthanoids and actinoids as specified below) form stable compounds in two or more formal oxidation states.
This so-called main transition is preceded by a smaller pre-transition endothermic peak at 35.6 °C, associated to the gel phase (Lβ -to- Pβ') phase change14.
In both cases the pre-transition had disappeared, the main transition had shifted to lower temperatures and it was broadened, and the enthalpy change ΔH was decreased.
Increasing the amount of each free fatty acid, the sharp peak associated with the DPPC main transition, became progressively more broad and asymmetric (Fig. 1).
