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The roofing of a railway station
Olbert, Jan ; Šmak, Milan (referee) ; Puchner, Josef (advisor)
The goal of this thesis is structural design of railway station lobby steel roofing. The construction dimensions are 63,0 m x 300,0 m with height adapted for railway vehicles traffic according to ČSN 73 6320 technical standard. The two-bay hall cross coupling consists of lattice trusses mounted on restrained columns. Axial spacing between individual bonds is 4,0 m. In the longitudinal direction the stability of articulated columns is secured by truss bracing placed in the roof and walls.
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Mechanism of copper mediated oxidative coupling of naphthols
Schröpferová, Tereza ; Roithová, Jana (advisor) ; Polášek, Miroslav (referee)
The 2,2'-disubstituated 1,1'-binaphthyls (BINOLs) are important ligands in enantioselective synthesis . The major approach for their preparation is based on transition-metal-mediated oxidative C-C coupling of 2-substituted naphtalenes. This diploma thesis examined the mechanism of the coupling reaction in the gas phase using mass spectrometry with electrospray ionization. The aim of this thesis was to compare the selectivity of the copper(II)- catalyzed coupling reaction of 2-naphthol and its derivative with an electron-withdrawing group, to detect possible reaction intermediates, and to determine the origin of the preference of the cross-coupling. The electron-withdrawing group of naphthol slows down the coupling reaction which enabled us to detect the reaction intermediates. The intermediates in the reaction of 2-naphthol were not observed, because the coupling reaction proceeds too quickly. Hence, we have observed only complexes of the coupling products. The preferential cross coupling was explaned on the basis of an interplay between the probability of the formation of binuclear copper complexes and the reactivity of such complexes.
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The roofing of a railway station
Olbert, Jan ; Šmak, Milan (referee) ; Puchner, Josef (advisor)
The goal of this thesis is structural design of railway station lobby steel roofing. The construction dimensions are 63,0 m x 300,0 m with height adapted for railway vehicles traffic according to ČSN 73 6320 technical standard. The two-bay hall cross coupling consists of lattice trusses mounted on restrained columns. Axial spacing between individual bonds is 4,0 m. In the longitudinal direction the stability of articulated columns is secured by truss bracing placed in the roof and walls.
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