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 657 for “"Crystal structures"”.
-
Cyclic polymer liquid crystal structures.
Recent advances in liquid crystal research have included the synthesis of polymeric materials which contain liquid crystalline moieties. The work presented here concerns the study of the structure-property relationships of a particular group of liquid crystalline polymers in which the polymer …
-
Optimization of Photonic Crystal Structures
… method for improving the performance of photonic crystal structures. Possible future research directions and applications are also briefly discussed.
-
Plastic Deformation in Complex Crystal Structures
Many materials with complex crystal structures have attractive properties, including high specific strength, good creep resistance, oxidation resistance, often through high silicon or aluminium content. This makes them of interest for high temperature structural applications, but the use of many …
-
Elasticity of some mantle crystal structures,
Thesis (Ph. D.)--Massachusetts Institute of Technology, Dept. of Earth and Planetary Sciences, 1971.
-
Crystal structures of the turquois-group minerals
Thesis (Ph. D.)--Massachusetts Institute of Technology, Dept. of Geology and Geophysics, 1964.
-
The acetanilide crystal structures: packing and conformational similarities
The dependence of crystal structure assembly on molecular changes has been studied for mono-substituted acylanilides. A library of 255 crystal structures has been investigated. 217 structures were determined during this project and 38 originated from the CSD. A subset of 64 mono-substituted …
-
The crystal structures of some phases of silica.
Massachusetts Institute of Technology. Dept. of Geology and Geophysics. Thesis. 1966. Ph.D.
-
Characterization of phase transitions by the analysis of crystal structures
… dependently by the performance of single-crystal X-ray diffraction experiments and measurements of the magnetic susceptibility. The X-ray diffraction experiments were carried out as data collections of integrated intensities of reflections and as measurements of profiles on selected …
-
Pharmaceutical applications and crystal structures of trehalose and its derivatives.
… novel carbohydrate derived compounds by single crystal X-ray diffraction have been elucidated. Five unique derivatised compounds were studied: 2,2'3,3'4,4’-hexaacetato-6,6’-bis(isobutanoyl)-a,a’-trehalose hydrate, 2,2’,3,3’,4,6,6'-hepta-O-pivaloyl-a,a’-trehalose, ditrityl a,a’-trehalose …
-
Crystal Structures of Helical Columnar pi-Conjugated Systems and Biodegradable Polyester
Crystal structures of helical columnar pi-conjugated systems, namely helicene-bisquinone and dendronized perylene bisimide derivative as well as of a biodegradable aliphatic polyester, namely poly-9-hydroxynonanoate, have been resolved by means of fibre X-ray diffraction. Enantiopure and racemic …
-
The crystal structures of sodium bicarbonate, propionic acid and valeric acid
Although Zachariasen was able to determine the gross structure of sodium bicarbonate, his assumptions preclude any conclusions to be drawn concerning the nature of the carbonate group itself. It is therefore the purpose of this paper to reinvestigate the sodium bicarbonate structure employing …
-
Crystal Structures of Four Arene Chromium Tricarbonyls and Two Other Inorganic Complexes
Made available in DSpace on 2014-12-09T17:35:44Z (GMT). No. of bitstreams: 1 6711831.pdf: 4450446 bytes, checksum: b017d46db1be0729f00492825dc72922 (MD5) Previous issue date: 1967
-
The crystal structures of para-chloriodoxy benzene and some other aromatic compounds
The crystal structures of meta-dinitrobenzene, para-chloriodoxy benzene, and benzene iodo-dichloride are described. The structure of meta-dinitrobenzene, C₆H₄(NO₂)₂), was obtained from Fourier projections on the ab and bc planes. The x and y coordinates were obtained with considerable accuracy from …
-
The nature of the crystal structures of some sulfide minerals with substructures
Thesis (Ph. D.)--Massachusetts Institute of Technology, Dept. of Geology and Geophysics, 1963.
-
On-chip single photon sources based on quantum dots in photonic crystal structures
… by the use of advanced two-dimensional photonic crystal structures. First, slow-light effects in a unidirectional photonic crystal waveguide were exploited to achieve on-demand single photon emission with a rate of up to 18.7 MHz, corresponding to a remarkable estimated internal device efficiency …
-
Atomistic modeling of ceramic materials : predicting crystal structures, thermodynamic properties, and diffusion behavior
Thesis (Ph. D.)--Massachusetts Institute of Technology, Dept. of Materials Science and Engineering, 1996.
-
From cytosine-tetraplexes to adenine-clusters : three crystal structures of DNA telomeric sequences
Thesis (Ph. D.)--Massachusetts Institute of Technology, Dept. of Physics, 1997.
-
Purely ionic and molecular orbital modelings of the bonding in mineral crystal structures
… has been used to generate ionic model CaCO₃ crystals in the calcite, aragonite, diopside, and perovskite structure types. For calcite and aragonite, the model predicts shorter CO bonds and larger bulk moduli than observed. Modeling of the thermochemistry of CaCO₃ does not reproduce the …
Page 1 of 33