[Demonstration of molecular combinations of alpha cyclodextrin (ACD) with dioctanoyl glycerol]. / Mise en évidence des associations moléculaires des alpha cyclodextrines (ACD) avec le dioctanoyl glycérol.

The molecular association of dioctanoyl glycerol (DOG) with the natural alpha cyclodextrin molecule (ACD) was studied using small unilamellar vesicles (SUV) by proton and 13C NMR. While no classic inclusion complex was found, a molecular association exists, leading to the formation of an insoluble precipitate. The possibility of a polar head group implication is discussed about the dimyristoyl phosphatidyl choline model.

A high-pressure structure in curium linked to magnetism.

Curium lies at the center of the actinide series and has a half-filled shell with seven 5f electrons spatially residing inside its radon core. As a function of pressure, curium exhibits five different crystallographic phases up to 100 gigapascals, of which all but one are also found in the preceding element, americium. We describe here a structure in curium, Cm III, with monoclinic symmetry, space group C2/c, found at intermediate pressures (between 37 and 56 gigapascals). Ab initio electronic structure calculations agree with the observed sequence of structures and establish that it is the spin polarization of curium's 5f electrons that stabilizes Cm III. The results reveal that curium is one of a few elements that has a lattice structure stabilized by magnetism.