Study of the features of masticatory efficiency in patients with acute cerebrovascular disorder by hemitype

The attention of dental researchers is constantly focused on assessing the quality of treatment for various pathologies of the dentоalveolar system, determining disorders of occlusal correlations, treatment, and prevention of diseases of the temporomandibular joint and periodontal tissue pathology. Numerous studies on the above aspects contain information on the characteristics of masticatory efficiency as one of the most vivid markers of orthopedic treatment, as it allows dentists to determine the quality of actual masticatory performance.The issues of functional diagnostics at the stages of rehabilitation of patients with partial defects of the dentition remain relevant, and therefore, the indicators of masticatory efficiency in prosthetics with removable dentures will be one of the most important criteria for adaptation to them. The situation exacerbates when such patients suffer from somatic pathologies of a neurological nature, in particular, acute cerebrovascular disorder.The aim of the research was to study the features of masticatory function in patients with a complicated course of acute cerebrovascular disorder with the neurological deficit by hemitypeThe study involved 25 people with a complicated course of acute cerebrovascular disorder with the neurological deficit by hemitype and 20 people from the control group, aged from 40 to 65 years, for whom partial removable laminar dentures with acrylic base and retaining bent metal clasps were manufactured according to clinical indications. All patients gave their free and informed consent to participate in the study.The masticatory efficiency was determined using the author's method based on the principle of graphical analysis of fragments of the agar-agar masticatory sample with subsequent programmed calculation and computer processing of numerical data.The evaluation indicators were as follows: the total number of fragments of the chewing sample and the number of fragments with a fraction of 500-1000 pixel2.Statistical analysis of the results was conducted using the Statistica 10.0 software package for Windows, and it embraced the following:1. Assessing the distribution of values and their correspondence to the normal one in the population.2. Comparison of the results obtained before applying a removable dental prosthesis and 30 days after its application.3. Intergroup comparison of the results.Thus, we observed an increase in the chewing sample parameters in the period from the beginning of orthopedic treatment until the 30th day of observation after applying a partial removable laminar denture. Despite the general trend, in the group of patients with ACVD, the masticatory efficiency was lower than that of the control group, which is confirmed by the difference between the total number of fragments (<17.22) and the number of fragments with a caliber of 500 to 1000 pixel2 (<4.41). In our opinion, this is due to the peculiarities of adaptation processes in patients with ACVD, who present with a much longer period than patients without a somatic pathology.The study revealed that the masticatory efficiency, restored by prosthetics with removable laminar dentures in the group of patients with a complicated course of ACVD by hemitype, one month after treatment is at the level of 88.68 (total number of fragments of the chewing sample) and 17.04 (number of fragments with a caliber of 500-1000 pixel2), which is a relatively worse indicator as compared to the control group. Thus, the total period of orthopedic rehabilitation for patients with ACVD is longer

Harmful admixtures assessment in sinter mixtures used in iron ore sinter plants in Poland

In this study composition of sinter mixtures used in Polish sinter plants were established. Seven sinter mixtures composition were examined, based on iron-bearing materials, admixtures and fuels. Contents of harmful admixtures were examined according to three kinds of environmental impacts: emissions of SOx, heavy metals, polychlorinated dibenzodioxins and polychlorinated dibenzofurans (PCDDs/PCDFs)

Chemical composition analysis of raw materials used in iron ore sinter plants in Poland

The main goal of the study was the analysis of the chemical compositions of raw materials used in iron ore sinter plants in Poland. The iron ore sintering process is the largest source of emissions of dust and gas pollution in the iron and steel industry. Hematite ores, magnetite concentrates, admixtures (dolomite, limestone and burnt lime), fuels (coke breeze, anthracite) and by-products are used in Poland to produce the sinter mixture

Chemometric study of the sinter mixtures used in sinter plants in Poland

The main goal of the study was the analysis of chemical parameters of sinter mixtures used in sinter plants in Poland. For this purpose the chemometric method was used, in this case hierarchical clustering analysis. This method allowed to examine the similarities and differences between the studied sinter mixtures

Electron-based crystalline undulator

We discuss the features of a crystalline undulator of the novel type based on the effect of a planar channeling of ultra-relativistic electrons in a periodically bent crystals. It is demonstrated that an electron-based undulator is feasible in the tens of GeV range of the beam energies, which is noticeably higher than the energy interval allowed in a positron-based undulator. Numerical analysis of the main parameters of the undulator as well as the characteristics of the emitted undulator radiation is carried out for 20 and 50 GeV electrons channeling in diamond and silicon crystals along the (111) crystallographic planes.Comment: 16 pages, 8 figures, Latex, IOP styl

Značaj ekološke metode procjene životnog ciklusa (PŽC) pri proizvodnji željeza i čelika

The following paper contains importance of LCA in the iron and steel industry. The metallurgy sector is highly energy intensive and the production of crude steel is associated with significant CO2 emissions. ULCOS (Ultra Low CO2 Steelmaking) is the world’s initiative to reduce carbon dioxide emissions by 50 % by 2 050 compared with today’s best routes from steel production by developing new breakthrough technologies. A new environmental Life Cycle Assessment (LCA) method has been undertaken in ULCOS as the most holistic approach of assessing environmental impact and selecting new technologies. Usage of LCA enables to compare alternative metallurgical technologies.Ovaj rad prikazuje važnost metode procjene životnog ciklusa (PŽS) u proizvodnji željeza i čelika. Metalurgija zahtijeva velike količine energije i proizvodnja čelika je povezana sa značajnom emisijom CO2. Vrlo niska emisija CO2 u proizvodnji čelika (VNECO2PČ) je svjetska inicijativa da se razvijanjem novih tehnologija do 2 050 smanji sadržaj CO2 na 50% u odnosu na današnje najpogodnije postupke. Nova ekološka metoda procjene životnog ciklusa je sastavni dio projekta vrlo niske emisije CO2 u proizvodnji čelika omogućuje holistički pristup procjene utjecaja na okoliš i odabira novih tehnologija. Korištenje procjene životnog ciklusa omogućuje usporedbu alternativnih metalurških tehnologija

The Problem of Multiculturalism and National Tolerance in Foreign Psychological Theory

Статтю присвячено розгляду проблеми мультикультуралізму та національної толерантності відповідно до закордонних психологічних теорій. Аналіз зазначеної проблематики представлено крізь призму розгляду психологічних феноменів національної ідентичності та ідентифікації, групової ідентичності, а також акультараційних стратегій. Охарактеризовано змістову сутність мультикультуралізму та моделей його функціонування в суспільстві. The article is devoted to considering the problem of multiculturalism and national tolerance in accordance with foreign psychological theories. The analysis concerning these issues is given through the prism of studying such psychological phenomena as national identity and identification, group identity, and acculturation strategies as well. The article also deals with the description of multiculturalism semantic essence and its function models

Coherent radiation of an ultra-relativistic charged particle channeled in a periodically bent crystal

We suggest a new type of the undulator radiation which is generated by an ultra-relativistic particle channeled along a periodically bent crystallographic plane or axis. The electromagnetic radiation arises mainly due to the bending of the particle's trajectory, which follows the shape of the channel. The parameters of this undulator, which totally define the spectrum and the angular distribution of the radiation (both spontaneous and stimulated), depend on the type of the crystal and the crystallographic plane (axis), on the type of a projectile and its energy, and on the shape of the bent channel, and, thus, can be varied significantly by varying these characteristics. As an example, we consider the acoustically induced radiation (AIR) which is generated by ultra-relativistic particles channeled in a crystal which is bent by a transverse acoustic wave. The AIR mechanism allows to make the undulator with the main parameters varying in wide ranges, which are inaccessible in the undulators based on the motion of particles in the periodic magnetic fields and also in the field of the laser radiation. The intensity of AIR can be easily made larger than the intensity of the radiation in a linear crystal and can be varied in a wide range by varying the frequency and the amplitude of the acoustic wave in the crystal. A possibility to generate stimulated emission of high-energy photons (in keV - MeV region) is also discussed.Comment: published in J. Phys. G: Nucl. Part. Phys. 24 (1998) L45-L53, http://www.iop.or