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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.
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Showing 11 to 20 of 1577 (0.011 seconds)| 11 |
Minimization methods in crystallographyStonebridge, B. R. January 1968 (has links)
No description available.
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| 12 |
Crystallographic investigation of n-Aminopyridinium perhalometallatesLawrence, Estee 06 February 2012 (has links)
MSc., Faculty of Science, University of the Witwatersrand, 2011 / This dissertation presents the results of a crystallographic investigation into nineteen
novel n-aminopyridinium perhalometallates of the general formula (C5H7N2
+)2MX4
2-
where n = 2, 3 or 4, M = Zn, Cd or Hg and X = Cl, Br or I. The aim was to identify
positional effects of the cation hydrogen bonding donor groups on the structures and to
possibly identify robust synthons. Overall structural trends were also studied. The
hybrid crystals were synthesized using temperature controlled crystallization methods
and were characterized using X- ray diffraction techniques. Eighteen of the nineteen
hybrid crystals displayed isolated tetrahedral perhalometallate anions. The results were
classified into six different classes of isostructural compounds. Eight of the nineteen
hybrid structures (42%) contained water. The 42% include two 3-ammoniopyridinium
structures and all cadmium and mercury containing 4-aminopyridinium structures. The
effect of a change in metal and/ or halide on the structure was investigated, and the
overall structural trends in each n-aminopyridinium family were identified. Four
different synthons were observed in the 2-aminopyridinium series while one synthon
was observed throughout the 4-aminopyridinium series. A common synthon was
observed in both the 3-aminopyridinium and 3-ammoniopyridinium series.
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| 13 |
X-ray powder diffraction studies of ettringite and related systemsBarnett, Stephanie Jayne January 1998 (has links)
No description available.
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| 14 |
Structure and conformation in phosphines and metal complexesBarker, John Joseph January 1994 (has links)
No description available.
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| 15 |
Second order interactions in solid state systemsBird, Craig Malcolm January 1995 (has links)
No description available.
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| 16 |
Aggregation of nitrogen in diamondQi, Z. January 1981 (has links)
No description available.
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| 17 |
Protein structural analysis : helices and their interactionsPearl, Frances Mary Genevieve January 1998 (has links)
No description available.
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| 18 |
A syntactic approach to protein topology predictionHatrick, Kerr January 1998 (has links)
No description available.
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| 19 |
Statistical mechanical theories of the anchoring transition and related phenomena in liquid crystalsTeixeira, Paulo Ivo Cortez January 1993 (has links)
No description available.
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| 20 |
Structural and functional aspects of the pentraxins and SAA in the acute-phase response and amyloidosisTennent, Glenys Ann January 1995 (has links)
No description available.
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