This study investigated the development of a novel approach to surface characterization of drug polymorphism and the extension of the capabilities of this method to perform 'real time' in situ measurements. This was achieved using diffuse reflectance visible (DRV) spectroscopy and dye deposition, using the pH sensitive dye, thymol blue (TB). Two polymorphs, SFN-β and SFN-γ, of the drug substanc...

Bacterial flagella assume different helical shapes during the tumbling phase of a bacterium but also in response to varying environmental conditions. Force-extension measurements by Darnton and Berg explicitly demonstrate a transformation from the coiled to the normal helical state (N.C. Darnton, H.C. Berg, Biophys. J. 92, 2230 (2007)). We here develop an elastic model for the flagellum based o...

The aim of this work was to study the mechanisms polymorphic transformations in ZrO2 ceramics under irradiation with heavy ions, as well determine nature structural distortions case t-ZrO2 → c-ZrO2 type and associated anisotropic deformations. samples were irradiated Kr15+ ions an energy 150 MeV fluences 1011–1016 ion/cm2. During evaluation changes depending on fluence, it found that at low (10...

Evolution of the Ti/a-GelSi trilayer reactions has been investigated using transmission electron microscopy and Auger electron spectroscopy. Instead of amorphous phase formation, as usually observed in the Ti/Si bilayer reaction, the crystalline Ti,GeS is the first phase observed during the reaction. Preceding the equilibrium C5CTi(Si,Ge),, a substitutional solid solution type C49-Ti(Si,Ge), fo...

The jump frequency of Cd tracer atoms in pure and Al-doped β-Mn was determined from measurements of quadrupole relaxation using the method of perturbed angular correlation of gamma rays. The jump frequency of Cd in β-Mn containing about 4.5 at.% Al had an activation enthalpy of 0.67(3) eV. In pure β-Mn at 950 K, the jump frequency was a factor about 8 larger than the value of 9.2 MHz in the all...