The article presents a separator whose magnetic circuit is comprised of large blocks from permanent NdFeB magnets and the knowledge gained from its assembly. In the separation zone of this separator, significantly higher values of magnetic induction were reached in comparison with a similar circuit with ferrite magnets. The results of the long-term comparative technological tests are provided of this separator when used in an industrial plant for the separation of undesirable ferromagnetic admixtures and objects (tramp iron) from raw materials for tile production. Throughout these tests, the fundamental influence of the value of magnetic induction in the separation zone on the amount of the captured magnetic fraction was confirmed and high efficiency of the new separator proven., Václav Žežulka and Pavel Straka., and Obsahuje bibliografii
Prolonged agonist stimulation results in specific transfer of activated Gα subunits of Gqα/G11α family from particulate membrane fraction to soluble (cytosol) cell fraction isolated as 250 000 x g supernatant. In this study, we have used 2D electrophoresis for more defined resolution of Gα subunits of Gqα/G11α family and followed the time course of solubilization effect. The small signal of soluble G proteins was already detected in control, hormone-unexposed cells. Hormone stimulation resulted in a slow but continuous increase of both intensity and number of immunoreactive signals/spots of these G proteins (10, 30, 60, 120 and 240 min). At longer times of agonist exposure (>2 hours), a marked increase of Gqα/G11α proteins was detected. The maximal level of soluble Gqα/G11α proteins was reached after 16 hours of continuous agonist exposure. At this time interval, eight individual immunoreactive signals of Gqα/G1 α proteins could be resolved. The relative proportion among these spots was 15:42:10:11:7:7:2:5. Solubilization of this class of Gα proteins was thus observed after prolonged agonist stimulation only, induced by ultra high concentration of hormone and in cells expressing a large number of GPCRs. Our data therefore rather indicate tight/persisting binding of Gqα/G11α proteins to the membrane., D. Durchánková, J. Novotný, P. Svoboda., and Obsahuje bibliografii a bibliografické odkazy
Studie Veroniky M. Mráčkové se zabývá problematikou přejímání středověkých hymnických melodií, ilustrovanou na konkrétním zvoleném příkladu., The hymn, one of the most frequently encountered songs in Western European sources, poses many questions with regard to the conflict between common and local traits. The Office hymns on which I focus were transmitted mainly in fourteenth- and fifteenth-century sources, which contain huge collections of hymns for different liturgical occasions, including those in honour of local saints. We still do not have a reasonable explanation of how or why the same tunes were adapted for different texts (or vice versa). The ‘Franciscan’ hymn melody Stäblein 752 (originally devoted to St Francis), for example, which occurs with different hymn texts in Austria, Germany, Bohemia, Poland and Spain, has many melodic variants reflecting regional characteristics. Why was this particular melody transferred to and adopted in other parts of Europe, where there was certainly no shortage of alternative hymn melodies? Is it a question of the adoption of favourite melodies in the Middle Ages? Were the same tunes used for hymns in honour of both male and female saints? What are the implications for us when the same ‘local’ tune can be identified in polyphonic hymn settings?, Veronika M. Mráčková., Rubrika: Studie, and České resumé na s. 32, anglický abstrakt na s. 19.
A strongly recommended conclusion in sociology about trends in class inequality has been summarised by Goldthorpe as a high degree of 'temporal constancy and cross-national communality'. This conclusion, here called 'the stability thesis', was first challenged by Ringen in 1987 and again, on more methodological grounds, by Ringen and Hellevik in two papers published in 1997. These challenges resulted in a process of debate and reassessment. It is now possible to sum up and conclude. The stability thesis rests on empirical results from odds-ratio readings of mobility table data. The authority of this methodology is re-examined in terms of normative significance and statistical validity. Mobility table data which have generated stability thesis findings are reanalysed with the standard gini-index methodology in the study of inequality, then yielding different findings which contradict the stability thesis. The main conclusion is that the stability thesis can now be considered overturned. Keywords: social inequality, social justice, social reform, class analysis, social stratification.
The anterior jejunum from common vole naturally infected with Giardia microti (Kofoid et Christiansen, 1915) was examined by ТЕМ and compared with the anterior jejunum from control (metronidazole-treated, Giardia-free) common voles (Pallas, 1778). Giardia microti infection resulted in significant diffuse shortening of microvilli and significant greater microvillous diameters. In addition, deformations of the microvilli were observed at the margin of the ventral disc. The microvilli attached to the lateral crest of the ventral disc were vesiculated with a disorganised filamentous core and contained whorled structures resembling “myelin-like figures”. The findings are discussed in context of the Giardia-epithelial cell interaction.
The ultrastructure and histochemistry of the tegument and penetration glands of adult Amphilina foliacea from the body cavity and the tissues of the internal organs of Acipenser ruthenus and A. stellatus were studied. New data on the localization in the tissue, development and in encapsulation of the adult A. foliacea mostly in the liver of A. ruthenus were obtained. The well developed penetration glands are necessary for penetration into the tissue and for migration of A. foliacea into the body cavity of the hosts. The tegument of the adult A. foliacea is a syncytium with cytons deeply embedded into the parenchyma. The secretory activity of the tegument of worms has a protective function against the immune system of the host. Our results give further information about the phylogeny of Amphilinidea and confirm the view of the close phylogenetic relationship of Amphilinidea and Cestoidea.
This paper presents the results of investigations on changes of the parameters of coal and surrounding rocks in the fault zones in the Upper Silesia Coal Basin. It has been shown that these zones, in relation to the undisturbed coal seams, reveal a n enrichment with some substances that pose a threat to the natural environment and that they also show a deterioration in the strength parameter values of rocks which threaten the safety of the operation. The greatest threat for the environment constituted sulphur and the ash. In the zone of the fault, it wa s observed that sulphur behaved in two ways. In the first case, the total sulphur and pyritic sulphur increased significantly by 192.3 and 823.5 %, respectively, and a small quantity of sulphate sulphur was found here, whereas in the other case, the total sulphur and pyritic sulphur decreased by 31.6 an d 35.3 %, respectively, and sulp hate sulphur increased considerably and reached up to 600 %. The mean content of ash increased by 171.8 %. The mechanical strenght of the rocks under uniaxial compressive strength in the fault zones decreased by 67 %, the microhardness of coal decreased to zero, and the intensity of cracks in coal grains increased by 359.1 %., Stanisław Roman Cmiel., and Obsahuje bibliografické odkazy
The importance of GIS detailed data for geomorphostructural study is discussed. This paper is a case study in the area of Inowrocław (central Poland). This small area is a place being a concentration of geological processes and its relief depicted by a number of height points (with determined elevations of satisfying accuracy required in the analysis) demonstrates their effects. The invented approach is based on a numerical analysis of actual and theoretical relief surfaces. Considering the area type this study involves a high resolution model of the relief. There are specified examples of correlation between morphological features and tectonic structures. The presented results prove a role of structural elements (faults) in development of geomorphostructural features and a tectonic mobility as a significant factor forming the area relief., Zbigniew Szczerbowski., and Obsahuje bibliografii