National Repository of Grey Literature 11 records found  1 - 10next  jump to record: Search took 0.00 seconds. 
Determination of Composition and Anomeric Ratio in Mixtures of Fluorinated Ologosaccharides.
Červenková Šťastná, Lucie ; Kurfiřt, Martin ; Hamala, Vojtěch ; Karban, Jindřich
Plenthora of glycosylation reactions was performed and sophisticated NMR approach for characteriza-tion of the coressponding products was aplied. ID 19F and *H NMR were utilized for accurate derermina-tion of anomeric ratios and 2D NMR techniques as HSQC, HMBC and COSY were used to assign the signals of individual anomers. In some cases, spectrum simulation was necessary to obtain the desired parameters.
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Dialytic Separation of Anions from DMSO Solution Facilitated by dendritic Receptors.
Cuřínová, Petra ; Winkler, Maximilian ; Krupková, Alena ; Budka, J. ; Wun, Ch.N. ; Blechta, Vratislav ; Červenková Šťastná, Lucie ; Sýkora, Jan ; Strašák, Tomáš
As the dialytic tubing is impermeable for big molecules of receptor, the anions crossing the barrier of dialytic tubing to form complex with the receptor stay entrapped inside and can be removed from the solution. NMR methods were used to study the complexation properties of given receptors as well as to determine the concentration changes during dialytic experiments.
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Hyperbranched Polyimide End-Capped with (+) or (-) – Isopinocampheylamine Used for Racemic Mixture Separation
Sysel, P. ; Vychodilová, Hana ; Červenková Šťastná, Lucie ; Žitka, Jan ; Brožová, Libuše ; Randová, A. ; Hovorka, Š. ; Izák, Pavel
In this work, the hyperbranched polyimides terminated with (+) or (-) – isopinocampheylamine were prepared and characterized. Their ability to separate of racemic mixtures of α-pinenes was also evaluated.
Selective Enantiomer Separation by Pertraction
Izák, Pavel ; Kačírková, Marie ; Vychodilová, Hana ; Červenková Šťastná, Lucie ; Žitka, Jan ; Brožová, Libuše ; Storch, Jan ; Randová, A. ; Hovorka, Š.
Membrane processes are not commonly used in enantiomer separation due to insufficiency explication of separation mechanisms and because the results of chiral membrane separation are not quite satisfying, especially in comparison with other separation technics, namely HPLC. A new method for selective separation of enantiomers by membrane processes taking advantage of ionic liquids is present. The supported chiral room temperature ionic liquid membrane is used for separation of enantiomers. Volatile enantiomers are separated by pervaporation and non-volatile enantiomers by pertraction.

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