[Comparative long-term results of surgical treatment of patients with diffuse toxic goiter].

Aim: To analyze long-term outcomes of Graves' disease management.

Material And Methods: There were 428 patients for the periods 2000-2004 and 2005-2010. Patients were called for examination and thyroid status control.

Piezoelectric enhancement under negative pressure.

Enhancement of ferroelectric properties, both spontaneous polarization and Curie temperature under negative pressure had been predicted in the past from first principles and recently confirmed experimentally. In contrast, piezoelectric properties are expected to increase by positive pressure, through polarization rotation. Here we investigate the piezoelectric response of the classical PbTiO3, Pb(Zr,Ti)O3 and BaTiO3 perovskite ferroelectrics under negative pressure from first principles and find significant enhancement.

[Effect of surgical treatment of thyroid nodules in older patients the likelihood of developing osteoporosis, the role of low levels of calcitonin].

In the article describes the role of deficiency of calcitonin, which originate after surgical operations on the thyroid gland, in headway of osteoporosis. Regarded significance such factors as age, level of parathyroid hormone, volume of the operational intervention in the development of osteoporosis. In elder people with thyroid nodular pathology bone metabolism is influenced by the amount of thyroid residue after resection.

Negative-pressure-induced enhancement in a freestanding ferroelectric.

Ferroelectrics are widespread in technology, being used in electronics and communications, medical diagnostics and industrial automation. However, extension of their operational temperature range and useful properties is desired. Recent developments have exploited ultrathin epitaxial films on lattice-mismatched substrates, imposing tensile or compressive biaxial strain, to enhance ferroelectric properties.

Ferroelectric translational antiphase boundaries in nonpolar materials.

Ferroelectric materials are heavily used in electro-mechanics and electronics. Inside the ferroelectric, domain walls separate regions in which the spontaneous polarization is differently oriented. Properties of ferroelectric domain walls can differ from those of the domains themselves, leading to new exploitable phenomena.