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101.
A multi-drug delivery system with sequential release based on titania nanotube arrays and polymer micelles as drug carriers is presented. Delivery of multiple water insoluble and soluble drugs required for combined local therapy is demonstrated. 相似文献
102.
Manley ME Yethiraj M Sinn H Volz HM Alatas A Lashley JC Hults WL Lander GH Smith JL 《Physical review letters》2006,96(12):125501
Phonon dispersion curves were obtained from inelastic x-ray and neutron scattering measurements on alpha-uranium single crystals at temperatures from 298 to 573 K. Both measurements showed a softening and an abrupt loss of intensity in the longitudinal optic branch along [00zeta] above 450 K. Above the same temperature a new dynamical mode of comparable intensity emerges along the [01zeta] zone boundary with energy near the top of the phonon spectrum. The new mode forms without a structural transition but coincides with an anomaly in the mechanical deformation behavior. We argue that the mode is an intrinsically localized vibration and formed as a result of a strong electron-phonon interaction. 相似文献
103.
We have carried out high-resolution inelastic x-ray scattering measurements of the excitations of lithium dissolved in ammonia. The incident x-ray energy was 21.6 keV and the resolution was about 2 meV. Several different excitations are observed in the energy range of 0-60 meV (0-500 cm(-1)). In addition to acoustic phonons at low energies, we see excitations that are associated with vibrations of Li(NH3)4+ complexes. We examined these excitations as a function of momentum transfer, lithium concentration, temperature, and state of the system (solid versus liquid). Data are compared with Hartree-Fock and density-functional theory calculations of the excitations of this complex, which agree well with the measured excitation energies. 相似文献
104.
The paper informs on the formation of the garnets Y3Fe5O12, Y3Al5O12 and Gd3Ga5O12 as primary phase in the ternary solvent mixtures PbO PbF2 B2O3 and PbO MoO3 B2O3. There are correlations with formerly measured oxygen ion concentrations (OIC) in the solvents:
- i each garnet grows in a special region of the OIC, the phase boundaries are parallel to the lines of constant OIC and
- ii the garnet solubility increases distinctly with decreasing OIC. This emphasizes the important role of the oxygen ions for the garnet formation.
105.
106.