Physical Mechanism of Nanocrystalline Composite Deformation Responsible for Fracture Plastic Nature at Cryogenic Temperatures.

In this work, we consider the physical basis of deformation and fracture in layered composite nanocrystalline/amorphous material-low-melting crystalline alloy in a wide temperature range. Deformation and fracture at the crack tip on the boundary of such materials as nanocrystalline alloy of the trademark 5BDSR, amorphous alloy of the trademark 82K3XSR and low-melting crystalline alloy were experimentally investigated. The crack was initiated by uniaxial stretching in a temperature range of 77-293 K.

Physical Mechanism of Selective Healing of Nanopores in Condensed Matter under the Influence of Laser Irradiation and Plasma.

The investigation of the features of laser control over the state of nanoscale objects in solid materials is an urgent task of condensed matter physics. We experimentally established the potential for the simultaneous enhancement of hardness and resistance to surface cracking in a titanium alloy due to selective laser irradiation. The regularities of selective heating near nanopores and the influence of the nanopore system on the features of isotherm propagation have been revealed.

Structural and functional synthesis of the continuous wave NQR temperature sensor with increased conversion linearity.

The paper describes development of the detailed structure and circuit diagrams of the continuous wave NQR temperature sensor with increased conversion linearity. It is experimentally established that at amplitude modulation of 40% and change of input voltage in the range of 20-1000 ​mV, the circuit of a symmetric marginal oscillator with a linear active demodulator provides better linearity of transfer characteristic than the circuits of asymmetric marginal oscillators with JFET or diode detectors. As a thermometric substance of the proposed NQR sensor, copper oxide CuO was used, which is characterized by a strong temperature dependence of the resonance frequency of Cu NQR.

[Pathogenetic and Prognostic Role of Growth Factors in the Development of Chronic Heart Failure].

Aim: To study the role of growth factors ((vascular endothelial growth factor (VEGF), platelet derived growth factor AB (PDGF-AB) and basic fibroblast growth factor (FGF-basic)) in the development and progression of chronic heart failure (CHF) in patients with ishcemic heart disease (IHD).

Materials And Methods: We included in this study 94 patients with CHF. The control group comprised 32 persons.

[Assessment of the role of matrix metalloproteinase-3 gene polymorphism in the development of chronic heart failure].

Aim: To study the impact of a polymorphic variant of the matrix metalloproteinase-3 (MMP-3) gene on the development and course of chronic heart failure (CHF) in patients with coronary heart disease.

Subjects And Methods: A total of 277 patients with New York Heart Association (NYHA) Functional Class (FC) II-IV CHF were examined. MMP-3 -1171 5A/6A genetic polymorphism was studied by polymerase chain reaction.