Cracking of C3-C4 Hydrocarbons on Cobalt and Palladium-Carbon Catalysts

The process of C3-C4 hydrocarbon cracking on cobalt and palladium cardonic catalysts, obtained under conditions of propane-butane mixture pyrolysis, was studied. It was found that using of carbon-mineral catalyst increases gas conversion and selectivity, yield of olefines and aromatic compounds

Provision of Biological Safety in the Territory of the Republic of Tatarstan during Preparation and Holding of FIFA World Cup-2018 in Kazan

Objective – assessment of effectiveness of the measures for biological safety provision at potentially hazardous facilities in the territory of the Republic of Tatarstan in the process of preparation and holding of FIFA World Cup-2018 in Kazan. Materials and methods. Regulatory-legal acts covering the requirements to the provision of biological safety during the work with pathogenic biological agents, international guidelines and documents determining inter-agency collaboration between the Rospotrebnadzor Administration in the Republic of Tatarstan and other departments and inter-agency task forces (Office of the Federal Security Bureau of Russia in the Republic of Tatarstan, Counter-Terrorism Commission in the Republic of Tatarstan, etc) were studied. Results and discussion. Considered were managerial-methodological approaches and matters of inter-agency cooperation on biological safety provision during preparation and holding of FIFA World Cup-2018 in Kazan. Biological safety was examined through the prism of its provision while working with pathogenic biological agents at potentially hazardous biological facilities and  counterterrorism integrity of the objects. The guiding, directive document in the performance of the complex of measures on biological safety provision and inter-agency collaboration was the Order of the President of the Russian Federation dated May 09, 2017 No 202 “On peculiarities of application of reinforced security measures during holding of FIFA World Cup-2018 and FIFA Confederations Cup-2017 in Russia”. As the result of the measures conducted, biological safety, including counter-terrorism security of potentially hazardous biological objects and sanitary-epidemiological welfare, was fully provided

Preparation and characterization of stable aqueous suspensions of up-converting Er3+/Yb3+-doped LiNbO3 nanocrystals

The preparation of LiNbO3:Er3+/Yb3+ nanocrystals and their up-conversion properties have been studied. It is demonstrated that polyethyleneimine- (PEI) assisted dispersion procedures allow obtaining stable aqueous LiNbO3:Er3+/Yb3+ powder suspensions, with average size particles well below the micron range (100–200 nm) and the isoelectric point of the suspension reaching values well above pH 7. After excitation of Yb3+ ions at a wavelength of 980 nm, the suspensions exhibit efficient, and stable, IR-to-visible (green and red) up-conversion properties, easily observed by the naked eye, very similar to those of the starting crystalline bulk material

Полимеризация стирола в присутствии кремнийорганических ПАВ различной природы

The characteristics of polymer suspensions received in the presence of different siliconorganic detergents were compared. The polymer suspensions have the narrow distribution of particles by size and contain the functional groups on their surface.Проведено сравнение свойств полимерных суспензий, полученных с использованием кремнийорганических ПАВ различного строения. Полученные полимерные суспензии характеризуются узким распределением по размерам и содержат на своей поверхности функциональные группы

Polymerization of styrene in the presence of different siliconorganic detergents.

The characteristics of polymer suspensions received in the presence of different siliconorganic detergents were compared. The polymer suspensions have the narrow distribution of particles by size and contain the functional groups on their surface

Evaluation Criteria and Surgical Technique for Transoral Access to the Thyroid Gland: Experimental Study

Background: The development of endoscopic techniques motivated surgeons to search for alternative and more cosmetic approaches for thyroid and parathyroid surgery. Several variations of transoral access to the anterior neck areas were applied in recent years. One of them is a premandibular access proposed by Nakajo et al, it is performed through the oral vestibule by creating the working space by means of the lifting method. Materials and methods: Nineteen unfixed human cadavers were used to develop the endoscopic access to the thyroid gland and surgical techniques of its resection. The Nakajo access was modified by altering the spatial location of the working instruments, resulting in practically no impact on the cosmetic outcome but providing a more comfortable operation for the thyroid gland. We determined evaluation criteria of the cadaver model before initiation of the experimental trial. Parameters that influence on alteration of these criteria were registered. Results: Of the 19 operated objects, the first 7 were used to practice the access technique from the incision in the oral vestibule to the thyroid gland in order to evaluate the possibility of endoscopic dissection of the important anatomical. The next 12 surgeries were carried out by manipulating the thyroid gland in the settings maximally close to real. Access implied good cosmetic results, less surgical traumatic due to a smaller area of detachment of the musculocutaneous flap. Conclusions: The achieved results show feasibility of introducing the described modification of transoral thyroidectomy into clinical practice