Global ETD Search
Search theses and dissertations gathered from participating repositories worldwide. Every result links back to the library that holds it. No account is needed.
Results
Showing 1 to 20 of 30 for “"crystal structure analysis"”.
-
The Crystal Structure Analysis of L-Arginine Dihydriodide and L-Tyrosine Hydriodide
Made available in DSpace on 2014-12-09T17:35:41Z (GMT). No. of bitstreams: 1 6706727.pdf: 5650685 bytes, checksum: 95da4d30abdc8bb3fabfc474690065ba (MD5) Previous issue date: 1966
-
The Application and Use of Punched Cards and International Business Machines in X-Ray Crystal Structure Analysis
Made available in DSpace on 2015-05-12T17:02:26Z (GMT). No. of bitstreams: 2 license.txt: 4848 bytes, checksum: 96035ab3f5e1c23cc7138a224ce498bd (MD5) 0006006.PDF: 7330485 bytes, checksum: 6b0c354177f2ce10cce4edc216401ca9 (MD5) Previous issue date: 1953
-
Structural studies of organic crystals of pharmaceutical relevance. Correlation of crystal structure analysis with recognised non-bonded structural motifs in the organic solid state
… techniques and correlation of these results with crystal structural database to establish the presence of physical motifs in selected systems. Structural motifs were identified by the use of single crystal and crystal packing analysis on diverse range of pharma-relevant materials including …
-
Zinc enzyme model complexes with Ligands containing a N2S Donor Set and their methylating reactions
… IR and NMR spectroscopy, 14 of them with single crystal structure analysis. <br>9 of the mononuclear tetrahedral N2S2 coordinated zinc complexes have been <br>investigated for the stepwise methylating reactions using the methylating <br>reagent iodmethane and trimethylphosphate. The result of the …
-
The Mechanism of Activation of Potassium Dependent and Potassium Independent Asparaginases from Common Bean (Phaseolus vulgaris)
… requires potassium for catalytic activation and crystal structure analysis suggested that Ser-118 in the activation loop plays a critical role in alkali metal coordination. This amino acid residue is replaced by an isoleucine in PvAspG-T2. Reciprocal mutants of the enzymes were produced and the …
-
Entwicklung anion-chiraler ionischer Flüssigkeiten und ihre Anwendung in der Katalyse
… This was based on the results of an X-ray single crystal structure analysis and NMR-experiments of this compound. A main focus has been laid upon the central chirality, which has been introduced through the application of a dissymmetric ligand. In addition to the aluminum and boron based compounds …
-
X-ray Crystallography of Inositol Dehydrogenase Enzymes
… to be a scyllo-inositol dehydrogenase. Sequence analysis and kinetics by themselves did not provide insight as to why the enzymes are functionally different. This manuscript provides a structural rationalization for the differences in stereoisomer selectivity by X- ray crystal structure analysis …
-
Synthetic and structural studies on early transition metal siloxides
… (n = 1 or 2) and Cp2Zr(OSiPh3)2. Single crystals Cp2Zr(OSiPh3h were studied using X-ray photographic techniques. They crystallise in the monoclinic system with a = 35. 7, b = 10.4, c = 21.1 A, f3 = 97.7 °, V= 7763 A3. A full crystal structure analysis was not possible due to failure of …
-
Group 3 and Group 13 Metal Hydride Compounds
… synthesized using H2 elimination. Mononuclear structures featuring tetrahedral coordination of the central aluminum atom were observed for the guanidinato ligand stabilized aluminum dialkyl complexes. The (Al)N-C-N(Al) bond angles in the corresponding complexes were determined using structural …
-
Biophysical chemistry of lipopolysaccharide specific bacteriophages
… and depolymerizes repetitive carbohydrate structures of O antigen in its host´s outer membrane lipopolysaccharide molecule. This is mediated by tailspikes, mainly β helical appendages on phage P22 short non contractile tail apparatus (podovirus). The O antigen of all three Salmonella …
-
Second Order Interactions in Solid State Systems
… bonds, have been studied through systematic analysis of published crystallographic data, and through the determination of novel crystal structures. Chapters 1-3 give relevant background on crystal structure analysis and describe the available crystallographic databases. Chapters 4 and 5 …
-
Contributions to the chemistry of higher-coordinate Silicon : synthesis, structure, and stereodynamics of new Silicon(IV) complexes with SiO2N2C, SiO4C, or SiO6 skeletons
… the solid state (elemental analyses (C, H, N), crystal structure analyses, 15N and 29Si VACP/MAS solid-state NMR experiments) and in solution (except 10; 1H, 13C, and 29Si NMR experiments)The spirocyclic zwitterionic Lambda5Si-silicates 13, 15, and 16 with an (ammonio)methyl group and two …
-
Development and exploration of Schiff base ruthenium carbene catalysts for olefin metathesis
… The new synthesis was confirmed with NMR and crystal structure analysis. A series of ten of these catalysts was synthesized and their activity was screened for several metathesis reactions. The main advantages lie in the stability of the catalysts which is expressed in challenging reactions, …
-
Characterization of leucyl-TRNA synthetase from homo sapiens and escherichia coli in aminoacylation, amino acid editing and interdomain interactions
… amino acid to enhance fidelity. Based on crystal structure analysis, the CP1 domain rotates 30° relative to the canonical core where aminoacylation occurs during tRNA translocation and presumably facilitates the movement of tRNA from the core domain to the editing domain. Single molecule …
-
Total Synthesis and Stereochemical Revision of Pestalospirane B
… Interestingly, the ECD data for the proposed structure of synthetic pestalospirane B ((+)-3) and reported data of the natural product did not match. Detailed ECD and X-ray crystal structure analysis unequivovally supported the stereochemical revision of pestalospirane B (3).
-
Preparation and reactions of some orthomanganated ketones, amides and aldehydes
… PhCH₂Mn(CO)₅. 7 (R=CH₃) was identified by X-ray crystallography. Preparation of the N-benzoyl- (7, R=Ph) analogue highlights a preference for metalation at the 5-membered indolyl ring, rather than the benzoyl ring. The N-benzoylpyrrole analogue of 7, …
-
The Effects of Buried Ionizable Amino Acids on the Stability of Ribonuclease Sa
… whether buried charge mutations alter the structure of our mutant proteins. To date, the structures of the 7S I71A and 8S I71D variants have been resolved by X-ray crystallography. Using software to align crystal structures based on geometries of the residue side-chains, we find that 7S …
-
Investigations on the Reaction Mechanism of Xenobiotic Reductase A
… and an oxidative half-reaction. The overall structure of the family members is similar but the active site residues show considerable variations. One distinct difference of XenA compared to other members is the presence of a cysteine residue (Cys25) in the active site, where most other …
-
Some chemistry of orthomanganated ketones
… 3-acetylindole and 2- acetylfuran. The crystal structure of η²-(3-acetyl-2,5-dimethylthien-4-yl)tetracarbonylmanganese (11) has been determined. The 5-manganated derivative (13) of flavanone has also been made. Attempted orthometallations of acetophenones with C₆H₅CH₂Co(CO)₄, …
-
Photochemistry of medium and large membered ring diketones in both the solution and crystalline state
… have been investigated with the help of X-ray crystallography and molecular mechanics calculations. Stereo selective cyclization was observed during the solid state photoreactions of all diketones investigated, with the exception of the ten, fourteen and seventeen membered ring compounds. The …
Page 1 of 2