Nanostructured materials are not immune from surface segregation, as can be shown for solid samples made from nanosized BaFelz.2xCoxTix019 barium femte particles and a variety of free clusters. Both theory and experiment provide ample demonstration that very limited dimensions of very small clusters does not necessarily impart stability against surface and grain boundary segregation. In fact, w...

The bending-induced polarization of barium titanate single crystals has been measured with an aim to elucidate the origin of the large difference between theoretically predicted and experimentally measured flexoelectricity in this material. The results indicate that part of the difference is due to polar regions (short-range order) that exist above T(C) and up to T*≈200-225 °C. Above T*, howeve...

Objective- To evaluate the effect of epidural anesthesia with lidocaine and bupivacaine on transit time of barium sulfate contrast medium through gastrointestinal (GI) tracts in healthy dogs. Design- Prospective, randomized experimental study. Animals-Five healthy mixed breed male dogs with 19.2±7.8 months age and 19.9±3.3 kg weight Procedure- The animals received one of the treatments of sa...

Hospital-acquired infections remain a costly clinical problem. Barium sulfate (BaSO4, in micron particulate form) is a common radiopacifying agent that is added to catheters and endotracheal tubes. Due to the recently observed ability of nanostructured surface features to decrease functions of bacteria without the aid of antibiotics, the objective of this in vitro study was to incorporate nano-...

BACKGROUND Usually the suitable consistence identified and indicated as safe by videofluoroscopic method has been empirically obtained by association of barium sulfate solution with meals. However, it has been evidenced to be very difficult to reproduce this consistence in nutritional rehabilitation therapy from subjective information. AIM To build two reproductive similar crescent viscositie...

During the course of an investigation into the excretion of “detoxication products” in the chicken (1) the need arose for a reasonably simple and reliable method for the estimation of “ethereal sulfate” in quantities of 0.1 to 1 mg. of SOa in volumes of some ml. of chicken urine. As none of the methods tried seemed satisfactory in the form described, a modification was developed. It appears tha...

During the course of an investigation into the excretion of “detoxication products” in the chicken (1) the need arose for a reasonably simple and reliable method for the estimation of “ethereal sulfate” in quantities of 0.1 to 1 mg. of SOa in volumes of some ml. of chicken urine. As none of the methods tried seemed satisfactory in the form described, a modification was developed. It appears tha...