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Showing 1 to 20 of 653 for “"crystallographic"”.
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Statistical analysis of crystallographic data
… structural database (CSD) is a vast resource for crystallographic information. As of 1st January 2009 there are more than 469,611 crystal structures available in the CSD. This work is centred on a program dSNAP which has been developed at the University of Glasgow. dSNAP is a program that uses …
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Crystallographic study of calcium metasilicates.
Thesis (Ph. D.)--Massachusetts Institute of Technology, Dept. of Earth and Planetary Sciences, 1969.
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Surgery spaces of crystallographic groups
Let Γ be a crystallographic group acting on the n-dimensional Euclidean space. In this dissertation, the surgery obstruction groups of Γ are computed in terms of certain sheaf homology groups defined by F. Quinn, when Γ has no 2-torsion. The main theorem is : Theorem : If a crystallographic group Γ …
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Crystallographic studies of some tetracyaquidimethane complexes.
The solid state structures of charge-transfer complexes of 7,7,8,8-tetracyanoquinodimethane, TCNQ, have been reviewed and classified into three main structural types viz homosoric (pseudosoric), heterosoric, and nonsoric. In an attempt to more fully understand the factors influencing the type of …
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Transformation Strain and Crystallographic Texture in Steels
… to calculate the interaction energies between crystallographic variants and external load. Using theoretical knowledge and with the help of a neural network model, new alloys have been prepared to be used as the welding filler metals to reduce the residual stress and to achieve higher …
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Crystallographic refinement of thermal parameters using normal modes
… factors of protein structures derived from crystallographic data using normal mode vectors. We hypothesize that the intrinsic flexibility of a structure is largely responsible for the variability in atomic coordinates and can be modeled using normal modes. The package is written in C/C++ and …
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Oxidoreductases and halogenated subtrates: Biocatalytic and crystallographic studies
En 2007 se implementó una regulación dentro de la Unión Europea conocida como ¿REACH¿ (Registro, Evaluación, Autorización y Restricción de Sustancias Químicas), cuyo objetivo es proveer una protección máxima a la salud humana y al medioambiente frente a los riesgos asociados con el manejo de los …
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Exploration of crystallographic defects in topological insulator metamaterials
Submission published under a 24 month embargo labeled 'Closed Access', the embargo will last until 2023-12-01
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Crystallographic studies of the insulin-linked polymorphic region
Thesis (M.S.)--Massachusetts Institute of Technology, Dept. of Chemistry, 1997.
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Crystallographic studies on enzymatic halogenation of natural products
Halogenated natural products are common and serve roles as hormones, pesticides, antibiotics, and anti-tumor agents. The incorporation of a halogen atom into an organic scaffold can tune the molecule's potency and selectivity, making halogenation an important tailoring reaction. To understand the …
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Crystallographic origins of fast-ion conduction in pyrochlore
We have examined the crystallographic origins of fast-ion conduction in oxides with the pyrochlore structure-type, ideally A2B2O7, a superstructure of (A,B)20 3.5 defect fluorite-like array. These materials have technological promise for use in electrochemical devices such as oxygen sensors and …
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Shape memory materials : crystallographic texture and its consequences
Thesis (S.M.)--Massachusetts Institute of Technology, Dept. of Mechanical Engineering, 2000.
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Initial crystallographic and phasing studies of FlhD/FlhC complex.
Initial crystallographic and phasing studies of FlhD/FlhC complex.
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Crystallographic studies on diheme cytochrome <i>c</i> enzymes
Abhängig von ihrer Umwelt und ihrem physiologischen Zustand bilden Bakterien unterschiedliche Elektronentransportketten aus. Elektronentransportsysteme in der inneren Membran übertragen Elektronen von verschiedenen Elektronendonoren wie NADH, organischen Molekülen oder Wasserstoff an lösliche …
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Crystallographic studies of interactions between ligands and DNA oligonucleotides
… in Chapter One are two out of only five crystallographic quadruplex/ligand structures reported to date. In both structures daunomycin molecules stack onto a terminal G quartet preventing the G4 quadruplex from destacking and unwinding. The number of interacting ligand molecules depends on …
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Chromatographic, Spectroscopic and Crystallographic Investigations of Chiral Recognition Processes
A number of experiments have been undertaken in order to determine, at the molecular level, the manner in which some of our recently developed low-molecular weight chiral selectors are capable of differentiating analyte enantiomers. When covalently linked to silica, these chiral selectors are …
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Crystallographic studies of the metal-responsive transcription factor NikR
Metal ion homeostasis is critical to the survival of all cells, because requirements for these essential nutrients must be balanced with their toxicity when present at elevated concentrations. Regulation of nickel concentrations in Escherichia coli is achieved via nickel-induced transcriptional …
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Quantitative characterization of crystallographic textures in zirconium-based alloys.
Thesis: M.S., Massachusetts Institute of Technology, Department of Materials Science and Engineering, 1977
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