Magnetic Tomography Method (MTM) Technology is developed by R&D Center "Transkor-K" (Russia) for assessing safety and integrity of pressurized pipelines of any purpose made of ferromagnetic materials. Quality of assessment is not influenced by transported product (gas-, oil-, water-, or other). MTM is based on the inverse magnetostrictive effect (Villary effect) - the change of the magnetic susceptibility of a ferrous material when subjected to a mechanical stress. Method uses " natural" magnetization of the ferrous pipes by magnetic field of the Earth. MTM equipment remotely registers magnetic field from the pipe while moving along its axis. MTM does not measure the dimensions of geometric defects alone but instead it measures the stress caused by these defects and identifies their type, location and orientation in accordance with the location and orientation of the area of stress. MTM determines the comparative degree of danger of defects by a direct quantitative assessment of the stress-deformed state of the metal.

Cold climate areas that provide opportunities for the remote inspection of pipelines include the Barents Sea, the Russian Arctic, the Alaskan Chukchi Sea, the Beaufort Sea and the Canadian Arctic offshore. First, an analysis of several actual projects of contactless diagnostics using the magnetic tomography method of pipelines in Arctic conditions is done. Second, the Risk-Based Inspection methodology for Arctic offshore pipelines is discussed. It involves ensuring pipeline reliability on the basis of data on the technical condition of the metal in actual operating conditions. The magnetic tomography method allows not only to remotely identify areas of anomalies with metal defects, but also to register mechanical stress levels taking into account actual loads. This reduces the risk for the structure to come to the critical state in terms of exceeding local loads. Finally, magnetic tomography technology allows managing risks in cases of local corrosion, stress cracking or loss of stability of underwater pipelines in areas with free spanning. The qualitative indicators of the inspection include the probabilities of identifying, interpreting the degree of danger, missing a dangerous defect. The pipeline diagnostics report provides the parameters of reliability forecasting: the period of incident-free operation, safe working pressure, and pressure coefficient.

Morphological and radiological methods were used to study regeneration of the damaged bone of rat mandibles after application of platelet-enriched fibrin clot. A bone hole was artificially created, and in the natural course of regeneration, the hole was immediately filled with blood and there a blood clot formed. After one week of healing, separate islands of young bone tissue appeared. After two to three weeks, the opening in the mandible was completely replaced by the young bone tissue. When a similar bone hole was filled with autological fibrin clot, the blood clot did not form. But after one week the entire hole was filed with newly-formed fused bone tissue. By the second week after the use of fibrin clot, the bone hole had further healed and bone callus was formed.

Regeneration processes in rat mandibular bone after transplantation of a suspension of autologous BM MSC in culture medium were studied by methods of light microscopy and X-ray densitometry. It was found that the structures of red BM in the callus after transplantation of autologous BM MSC formed earlier than in natural reparation. The formation of cavities containing BM determines lower tissue density at the site of injury after transplantation of autologous BM MSC on weeks 4 and 5 of observation than during spontaneous healing. These changes progressed throughout the observation period and attested to accelerated bone tissue reparation.