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1
Content available Multimodal Łódź Fabryczna Station
Raczyńska E.
TTS Technika Transportu Szynowego
|
2018
|
R. 25, nr 4EN
10--15
EN
The reconstruction of the Łódź railway node, including the construction of an underground station in the city centre, gave the possibility of profound changes in passenger service of railway and bus long-distance and regional service. As a result, a large and modern multimodal node concentrating all means of transport was created in the city centre. The new station together with the surrounding road infrastructure was opened in December 2016. The assessment of the functionality of this station is the subject of this article.
2
Content available Nowe zespoły trakcyjne Talent na sieci S-Bahn w Wiedniu
Raczyńska E.
TTS Technika Transportu Szynowego
|
2005
|
R. 11, nr 1-2
93-95
PL
Na torach wiedeńskiego S-Bahn, szybkiej kolei miejskiej, 21 grudnia 2004 r. pojawiły się zespoły trakcyjne Talent, wyprodukowane przez firmę Bombardier. Koleje austriackie zamówiły łącznie 111 takich zespołów, z których 30 będzie obsługiwać ruch pasażerski właśnie w Wiedniu.
3
On n-pi Elektron Distribution in Simple Keto-Enol tautomeric Systems: H3C-C(R)=O==H2C=C(R)-OH and RH@C-CH=O==RHC=CH-OH
Raczyńska E.
Polish Journal of Chemistry
|
2005
|
Vol. 79 / nr 4
749-758
EN
Variations of the n- electron distribution during the tautomeric interconversion and substituent effects were analysed for simple keto-enol tautomeric systems of general formulae H3C-C(R)=O H2C=C(R)-OH and RH2C-CH=O RHC=CH-OH using the geometry-based HOMA index.
4
On n-pi Electron Distribution in Simple Acyclic Tetrad and Pentad Tautomeric Systems
Raczyńska E.
Polish Journal of Chemistry
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2005
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Vol. 79 / nr 6
1003-1013
EN
Variations of the n-pi electron distribution during the tautomeric interconversion were analysed for simple acyclic tetrad and pentad tautomeric systems using the geometry- based HOMA index. Internal effects such as Y-conjugation, push-pull effect and intramolecular H-bonding were discussed.
5
Keto_Enol Tautomerism in Pyruvic Acid-Theoretical (HF, MP2 and DTF in the Vacuo) Studies
Raczyńska E., Duczmal K., Darowska M.
Polish Journal of Chemistry
|
2005
|
Vol. 79 / nr 4
689-697
EN
Extended quantum-chemical calculations {HF, MP2, DFT(B3LYP) in vacuo} were performed for neutral pyruvic acid and its enol forms. Among various tautomers-rotamers considered, three keto (Tce, Tte and Cte) and six enol structures (E1-E6) are found to be thermodynamically stable. The stability order for the keto and enol isomers: Tce > Tte > Cte > E1 > E2 > E3, E4, E5 > E6 is the same at each level of computations. The keto Tce structure has the lowest Gibbs free energy (G). The G value of the most stable enol E1 structure is larger than those of the three keto structures by a few kcal mol-1.
6
Theoretical (DFT in Vacuo) Studies on the Structure of 2-(_-Aminoethyl)-pyridine - an Agonist of the Histamine H1Receptor. Comparison with Experiment (FT-IR in Apolar Solvent)
Raczyńska E., Darowska M., Rudka T.
Polish Journal of Chemistry
|
2003
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Vol. 77 / nr 11
1529-1546
EN
Preliminary quantum-chemical calculations (DFT) were performed for 2-(_-aminoethyl)- pyridine (AEP). In calculations, rotational isomerism around the single C-C and C-N bonds of the chain aminoethyl group in AEPwas considered. Nine stable conformations (four trans and five gauche) with similar Gibbs energies were found. For all of them, vibrational frequencies were calculated at the DFT(B3LYP)/6-31G* level. Infrared (FT-IR) spectra were recorded in apolar solvent (CCl4) for various concentrations of AEP, and compared with those found by computations. The comparison shows that in apolar CCl4 solution AEP exists as a mixture of different conformers. Analysis of the experimental stretching NH and CH vibrations, and the bending in-plane NH vibrations suggests that all nine conformers of AEP can be present in CCl4 solution.
7
Prototropic Tautomerism in 2- and 4-Hydroxypyridines : Halogen Substituent Effects in the Gas Phase Calculated by Semiempirical (AM1) Method
Raczyńska E.
Polish Journal of Chemistry
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1999
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Vol. 73, nr 11
1863-1876
EN
Tautomeric equilibrium constants were calculated in the gas phase for unsubstituted, mono- and tetrahalogenated 4-hydroxypyridines and for unsubstituted, mono-, di- and tetrahalogenated 4-hydroxypyridines using semiempirical method. Influence of position of halogen on the pK is studied and compared with that found previously in solution.
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