1-Methyl-6-nitro-1H-benzimidazole

The title compound, C8H7N3O2, a potential anti­tumour drug and an anti­oxidant agent, was studied in order to give more insight into structure–function relationships. The 1-methyl­benzimidazole unit of the mol­ecule was found to be exactly planar and the nitro group is inclined at an angle of 10.4 (2)° to the plane of the heterocycle. The bond lengths in the present derivative were analyzed in details and compared with those of the parent unsubstituted analogues in the Cambridge Structural Database. The results have shown that the additional nitro group is not involved in conjugation with the adjacent π-system and hence has no effect on the charge distribution of the heterocyclic ring

5-Amino-1-methyl-1H-benzimidazole

The structure of the title compound, C8H9N3, a potential anti­tumour drug, was determined in order to give more insight into its structure–function relationships. The benzimidazole core of the mol­ecule was found to be exactly planar, while the substituents are displaced slightly from the mol­ecular plane [C—C—N—C and C—C—C—N torsion angles of 0.8 (3) and 179.0 (1)° for the methyl and amino groups, respectively]. The bond lengths are analysed in detail and compared with those of the parent unsubstituted analogues. The results show that the lone-pair electrons on the amino N atom are involved in conjugation with the adjacent π system and hence affect the charge distribution in the heterocycle. Two inter­molecular N—H⋯N and C—H⋯N hydrogen bonds have been identified

Recruitment System of Football Clubs in the Moravian-Silesian Region

Import 04/07/2011Tato bakalářská práce se snaží čtenáře seznámit se způsobem, jakým vykonávají fotbalové kluby Moravskoslezského kraje nábor hráčů do svých mládežnických družstev. Teoretická část se zabývá organizační strukturou sportu, organizační strukturou fotbalu v ČR, možnostmi získávání finančních prostředků fotbalových klubů, právními formami fotbalových klubů, sportovním managementem a sportovním marketingem. Praktická část analyzuje způsob, jakým kluby získávají hráče, dále stručně popisuje příjmovou a výdajovou stranu rozpočtu vybraných klubů, zjišťuje charakteristické prvky českého mládežnického fotbalu a navrhuje možná zlepšení. Závěr bakalářské práce je shrnutím veškerých poznatků uvedených v praktické části.This bachelor thesis is trying to acquaint readers with way in which football clubs in Moravian-Silesian region execute their recruitment of footballers into youth teams. Theoretical part is dealing with organizational structure of sport, organizational structure of football in Czech Republic, ways of gaining financial resources into football clubs, legal forms of football clubs, as well as with sport management and sport marketing. Practical part analyses way in which football clubs attract players, then it describes incomes and expenditures of selected clubs, it investigates main characteristics of Czech youth football and proposes possible improvements. Conclusion of the bachelor thesis consists of summary of all the evidence mentioned in a practical part.Prezenční115 - Katedra managementuvýborn

ADSORPTION OF DODECYLBENZENESULFONIC ACID ON THE ALUMINA PARTICLES IN THE PREPARATION OF ALUMINA FOAM

Partially hydrophobized particles of α-Al₂O₃ were used to prepare the alumina foams. Dodecylbenzenesulfonic acid (DBSA) was applied to the hydrophobized surface of alumina particles. The infrared spectroscopy provided the evidence of the interaction (adsorption) of DBSA on the alumina surface. The quantity of DBSA adsorbed on the alumina particles was determined using Lambert-Beer law by measuring UV-VIS spectra. The mechanisms of DBSA adsorption on the surface of alumina particles may be attributed to (1) electrostatic interactions or (2) specific chemical reactions between the surfactant and the surface hydroxyl groups. Adsorption of DBSA on the alumina particles is strongly influenced by the pH of suspensions. The quantity of DBSA is not sufficient to hydrophobize alumina particles at pH up to about pH 9.5, as the electrostatic repulsion forces between the sulfonic group of DBSA and the alumina surface prevailed and the DBSA acts only as a surfactant. The foams were sintered at 1400 °C, 1450 °C, 1500 °C, 1550 °C and 1600 °C. The optimal sintering temperature was found to be 1550 °C. The maximal compressive strength of the alumina foams was ∼ 300 kPa while its porosity was relatively high (96.7 %)

Wpływ obróbki cieplnej na właściwości złączy Cu-Al zgrzewanych wybuchowo

Explosive welding of copper C10200 to aluminium alloy AW 5083 was performed. C10200 was proposed as a flyer plate due to its suitable plastic properties. A parallel layout of welded metals was selected to attain a more stable welding process. Welding parameters and conditions were determined. The surfaces of both materials were mechanically machined and degreased prior to welding which was performed using Semtex S30. The bimetals were characterized by a regular wavy interface. The aim of the research was to establish the influence of heat treatment on both the structure and microhardness at the interface of the explosively welded bimetal Al-Cu. Heat treatment was performed at 250, 300 and 350 °C over 2, 3 and 4 h. After heat treatment, an increase in Inter Metallic Compounds (IMC) was observed, proportional to the increasing temperature. An analysis of chemical composition carried out by EPMA (Electron Probe Micro Analysis) confirmed the presence of Inter Metallic Phases (IMP) such as θ (Al2Cu), η2 (Al2Cu), ξ2 (Al3Cu4), δ (Al2Cu3), γ1 (A14Cu9). The microhardness decreased after the heat treatment in the bimetal but significantly increased at the interface as a consequence of IMC formation.Wykonano zgrzewanie wybuchowe stopu aluminium miedź C10200 i AW 5083. C10200 został zaproponowany jako płyta napędzana ze względu na jego odpowiednie właściwości plastyczne. Wybrano równoległy układ zgrzewanych metali, aby uzyskać bardziej stabilny proces łączenia. Określono parametry i warunki łączenia. Powierzchnie obu materiałów zostały poddane obróbce mechanicznej i odtłuszczeniu przed zgrzewaniem wykonanym przy użyciu Semtex S30. Bimetale charakteryzowały się regularną falistą powierzchnią styku. Celem badań było określenie wpływu obróbki cieplnej zarówno na strukturę, jak i mikrotwardość na granicy faz bimetalu Al-Cu zgrzewanego wybuchowo. Obróbkę cieplną przeprowadzono w 250, 300 i 350 °C przez 2, 3 i 4 godziny. Po obróbce cieplnej zaobserwowano wzrost związków międzymetalicznych (IMC), który był proporcjonalny do wzrostu temperatury. Analiza składu chemicznego przeprowadzona przez EPMA (Electron Probe Micro Analysis) potwierdziła obecność IMP takich jak θ (Al2Cu), η2 (AlCu), ξ2 (Al3Cu4), δ (Al2Cu3), γ1 (Al4Cu9). Mikrotwardość zmniejszyła się po obróbce cieplnej w bimetalu, ale znacznie wzrosła na granicy faz w wyniku tworzenia IMC