Publications by authors named "V A Privalov"

In order to increase the thermal stability of olefin polymerization precatalysts, new titanium(IV) complexes with diolate ligands differing in the degree of steric hindrances were synthesized from readily available precursor (±)camphor. The structures of the complexes were established by X-ray diffraction. Complexes in the presence of an activator {EtAlCl + BuMg} catalyzed the synthesis of UHMWPE with an M up to 10 million and a productivity of up to 3300 kg/mol·atm·h.

View Article and Find Full Text PDF

A series of bis(phenoxy-imine) (FI) titanium(IV) and zirconium(IV) complexes have been synthesized. The effect of the nature of the activator (MAO, combinations EtAlCl + BuMg and iBuAl + [PhC][B(CF)]) on the catalytic activity and properties of the resulting polymers was studied. It was found that Ti-Fi complexes, despite the nature of the outgoing ligands (Cl or iPrO) in the presence of Al/Mg activators, effectively catalyze the polymerization of ethylene (with the formation of UHMWPE); copolymerization of ethylene with 1-octene (with the formation of ultra-high molecular weight copolymers); and the ternary copolymerization of ethylene, propylene and 5-vinyl-2-norbornene (with the formation of polyolefin elastomers).

View Article and Find Full Text PDF

The parameters of haemodynamics in 64 pheochromocytoma patients were studied by the "Centaur" technology using the methods of echocardiographic examinations, daily monitoring of arterial pressure and bioimpedance rheography. A comparative analysis of the character of hemodynamic derangements in pheochromocytoma patients at various stages of treatment depending on the quality of preoperative preparation was made. A reliable positive influence of selective alfa-adrenoblocks of the parameters of blood circulation in pheochromocytoma patients in the preoperative and intraoperative periods was revealed.

View Article and Find Full Text PDF

Thyroid state study was been carried out for Chernobyl NPP accident liquidators living in Ozyorsk, the city, located in the nuclear facility affected zone (Mayak PA). In total 531 individuals were examined. Thyroid assessment was made basing on physical examination, on ultrasound study and on hormones measurement of thyroid stimulating hormone, free thyroxine and thyroid peroxidase antibody.

View Article and Find Full Text PDF

An investigation of the physical (capillaries, elasticity, strength, traumaticity) and implantation properties of modem synthetic absorbable suture material "Maxon 1", "Polysorb 1", "Vicryl 1" has shown considerable advantages of the monofilic thread "Maxon 1". For surgical treatment of anterior rectocele of the III degree (anterior levatoroplasty) this thread was used in 114 patients with good direct, nearest and long-term results.

View Article and Find Full Text PDF