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  • About
  • The Global ETD Search service is a free service for researchers to find electronic theses and dissertations. This service is provided by the Networked Digital Library of Theses and Dissertations.
    Our metadata is collected from universities around the world. If you manage a university/consortium/country archive and want to be added, details can be found on the NDLTD website.
181

The separation technique for nonlinear partial differential equations : General results and its connection with other methods

Malloki, I. A. January 1987 (has links)
No description available.
182

Charakterizace nových chirálních separačních systémů pro použití v HPLC / Characterization of new chiral separation systems for HPLC

Vozka, Jiří January 2014 (has links)
The dissertation thesis is focused on the physico-chemical characterization of interaction mechanisms of chiral stationary phases based on derivatized cyclofructans. Correct interpretation of retention and enantiodiscrimination processes substantially facilitates the development and optimization of new enantioselective methods using cyclofructan-based chiral stationary phases. At first, the interaction mechanisms of three commercially available cyclofructan-based stationary phases were studied in normal-phase mode of liquid chromatography. Namely, systems using chiral stationary phases based on dimethylphenyl carbamate cyclofructan 7, R-naphtylethyl carbamate cyclofructan 6 and isopropyl carbamate cyclofructan 6 were studied. Linear free energy relationship model was used as a basic tool for characterization of interactions on the stationary phases. The mentioned model revealed that the main interactions contributing to retention in cyclofructan-based systems are hydrogen bond acidity and dipolarity/polarizibility, while dispersion interactions cause decrease of retention. The impact of oligosaccharide skeleton of the cyclofructan selector on the enantioselectivity was elucidated by the comparison with seemingly analogous cyclodextrin-based chiral stationary phases. Cyclofructan-based chiral...
183

Synthesis and Characterization of Calixsalen Macrocycles and Calixsalen Metal Complexes and their Potential Applications

Altamimy, Monerah 06 1900 (has links)
Calixsalens, which are vase-like structures with a salen unit at each of their triangular vertices, have unique properties that make them potential candidates for separation. However, the use of calixsalens for separation had not previously been studied. In this work, we synthesized two calixsalen derivatives using the concept of dynamic covalent bond formation (imine).1H NMR, 13C NMR, mass spectrometry and Single Crystal X-ray Diffraction (SCXRD) confirmed the successful formation of [3+3] macrocycles. We investigated the selective adsorption of hexane isomers by the calixsalens. 1H NMR and gas chromatography analyses showed that calixsalen is more selective towards branched hexane isomers (3-methylpenaten, 2-methylpentane, 2,2-dimethylbutane, and 2,3-diethylbutane) compared to n-hexane. Treatment of these macrocycles with different types of metal ions transformed their conformations from [3+3] to [2+2] macrocyclic metal complexes, which was confirmed by SCXRD. The calixsalen metal complexes were preliminary tested for Styrene/Ethylbenzene separation.
184

Extraction, partial purification and characterization of transglutaminase from the liver of bluefish (Pomatomus saltatrix)

Subramanian, Vidya. January 2008 (has links)
No description available.
185

Separation and coalescence phenomena in three phase systems

Smith, Peter Graham. January 1984 (has links)
No description available.
186

Biocatalysis of immobilized lipoxygenase in organic solvent media

Dioum, Ndeye. January 2000 (has links)
No description available.
187

Isolation and characterization of proteins from defatted flaxseed meal

El-Ramahi, Razan S. January 2003 (has links)
No description available.
188

Electrofiltration of hydrophobic colloids in fluidized bed bipolar electrodes

Seoud, Hicham F. January 1980 (has links)
No description available.
189

An immunochemical analysis of goldfish brain proteins using antisera raised against memberane fractions /

Manseau, Maryse January 1989 (has links)
No description available.
190

Chemical separation in electrostatic precipitators

Salcedo, R.L.R. (Romualdo L.R.) January 1981 (has links)
No description available.

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