Crystal Structure and Ferroelectric Evidence of BaZnSi O , a Low-Permittivity Microwave Dielectric Ceramic.

BaZnSi O ceramic was prepared by the conventional solid-state method and sintered at 1100 °C. XRD and synchrotron Rietveld refinement analyses revealed the BaZnSi O ceramic presented a monoclinic structure with a space group of P2 /a (No.14), which is reported for the first time.

Preoperative and postoperative analgesic techniques in the treatment of patients undergoing transabdominal hysterectomy: a preliminary randomized trial.

Background: Although pre-emptive analgesia is commonly used for the management of postoperative pain in developed countries, no defined protocol has been carried out and widely practiced, especially in transabdominal hysterectomy. Keeping this in mind the present study aimed to investigate the effects of multimodal pre-emptive analgesia on pain management, stress response and inflammatory factors of patients undergoing transabdominal hysterectomy to find an optimized way of pre-emptive analgesia.

Methods: One hundred patients undergoing abdominal hysterectomy were randomly divided into four groups (Trial registration: ChiCTR-IPR-15005848).

Effects of chitosan and its derivative added to water on immunological enhancement and disease control.

Background: An immune system is a system of biological structures and processes within an organism that protects against diseases by identifying and killing pathogens and tumor cells. Development of novel natural immune enhancers is an urgent issue.

Methods: In experiment 1, Newcastle disease antibody titer, levels of IL-6, IL-10 and IFN-γ, and changes in CD3(+), CD4(+) and CD8(+) cells were analyzed.

Direct synthesis of ultrafine tetragonal BaTiO3 nanoparticles at room temperature.

A large quantity of ultrafine tetragonal barium titanate (BaTiO3) nanoparticles is directly synthesized at room temperature. The crystalline form and grain size are checked by both X-ray diffraction and transmission electron microscopy. The results revealed that the perovskite nanoparticles as fine as 7 nm have been synthesized.

Investigation of polarization-induced fading in fiber-optic interferometers with polarizer-based polarization diversity receivers.

A technique is described to eliminate polarization-induced fading in fiber-optic interferometers with two or three polarizers. Modeling and simulation show that two polarizers should be angularly spaced by 90 degrees to alleviate polarization-induced fading. A test system is set up with two 6.