Lysophosphatidylcholine-water system: calorimetric study of the lamellar-micellar transition before and after gamma-irradiation

Spin label partition in gamma-irradiated lysophosphatidylcholine-water systems

“…A detailed examination of the behaviour of ~ and ~ within the range of the transition, not reported here, supports the previous hypothesis based on calorimetric experiments, i.e. that at doses from 4.108Gy to 8.108Gy the structural transition consists of two partial transitions [5].…”

“…Figure 2 shows the evolution with temperature of the high-field line of two samples irradiated at different doses. A qualitative appreciation evidences a) two components partially resolved; b) a transition occurring in an interval of temperature growing higher with the absorbed dose, a behaviour that closely matches the calorimetric one [5].…”

“…the LMT transition change substantially when the absorbed dose grows higher [5]. The present work intends to characterize the lipidic phase of irradiated specimens of 1SPC using spin label techniques as well as to obtain further information about the evolution among the different structures.…”

“…Several studies on the structural organization of low concentration of LPC in water have evidentiated a thermotropic transition from a LS to a MS [4][5][6]. In the LS, present at low temperature, the acylic chains are closely packed and probably interdigitated, while in the MS those chains are in a liquidlike state [7].…”