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.
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Showing 1 to 20 of 2697 for “"selectivity"”.
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Werner clathrates: structure and selectivity
The development of enhanced selectivity of a host towards (aromatic) isomers continues to be an important feature in supramolecular studies. In this thesis, several nickel Werner complexes have been synthesised and used as crystallographic hosts with inclusions of aromatic isomers, polycyclic …
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Selectivity in host-guest compounds
… structures of host-guest compounds and the selectivity shown by the host molecule when presented with a guest mixture. Four host compounds were used to prepare 29 new inclusion compounds. Two of these hosts were similar bulky diols and were synthesised by Weber (H1 and H2). The other two, a …
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Molecular selectivity by host-guest methods
… compounds in the intention of understanding the selectivity characteristics of a particular host. For the purpose of the analysis, structural isomers with close boiling points were selected. Competition experiments were set to survey which of the isomers were a better fit for a particular host. …
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Inclusion compounds : structure, reactivity and selectivity
This thesis is concerned with structure, thermodynamic and kinetic aspects of a variety of inclusion compounds which contain small organic guests. The host compounds studied are alkaline-earth metal salts of O,O’-dibenzoyl-(2R, 3R)-tartraric acid (magnesium, calcium and strontium), …
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The solvent dependence of enzymatic selectivity
Thesis (Ph. D.)--Massachusetts Institute of Technology, Dept. of Chemistry, 1996.
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Selectivity and soil behavior of chlorsulfuron
Response of barley (<i>Hordeum vulgare</i> L.) and wheat (<i>Triticum aestivum</i> L.) to root-applied chlorsulfuron (2-chloro N-[[(4-methoxy-6-methyl-1,3,5-triazin-2-yl) amino] carbonyl] benzenesulfonamide), a herbicide for use in small grains, was investigated. The results showed that, although …
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Selectivity and detection in capillary electrophoresis
… contribution to the minimization of some of the selectivity and detection limitations in capillary electrophoresis. A more practical design of an electrochemical detector is introduced with simultaneous on-line UV detection¹, for the selective detection of a number of pungent and neurological …
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Studies towards controlling selectivity in Minisci reactions
… of radical precursors. However, controlling regioselectivity in Minisci reactions remains challenging, when there are multiple accessible positions on the heteroarene. Furthermore, when prochiral radicals are used, a new stereocentres arises in the product. This thesis focuses on studies towards …
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Selectivity in subunit composition of EnaNASP tetramers
… the tetramerization domain mediates the observed selectivity in complex formation. My findings suggest that hetero-tetramerization serve as an additional method to regulate the activity of EnaNASP proteins.
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Ion Selectivity and Gating in the NAK Channel
Ion selectivity and gating are two fundamental properties central to proper physiological functioning of ion channels. In this work, a thorough structural characterization of ion binding profiles is presented for the NaK channel, a non selective cation channel from Bacillus cereus, along with an …
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Selectivity for Movement Direction in the Human Brain
… which areas in the human brain show directional selectivity. Moreover, I measured to what extent directional selective regions are sensitive to changes in other movement parameters, like the type of motor act and movement amplitude. In three functional magnetic resonance imaging (fMRI) …
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Food selectivity of Bluegill and Green Sunfish Fry
… (Lepomis macrochirus) fry, to examine their food selectivity. Green sunfish and bluegill fry ranged in size from 8.5-11.0 mm and 8.0-10.5 mm at stocking and were reared for 31 and 30 days, respectively. The gut contents of 1488 green sunfish and 1440 bluegill fry, representing day and night …
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FUNCTIONAL SELECTIVITY DOWNSTREAM OF Gαi/o-COUPLED RECEPTORS
… bias were employed and compared. Functional selectivity analyses were also employed as tools to explore the relative contribution of immediate dopamine D2 receptor effectors for the activation of more complex signaling pathways. We have further identified novel classes of AC1 inhibitors …
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Modulation and Ligand Selectivity of Mammalian Odorant Receptors
… at the peripheral level is defining the ligand selectivity and activity regulation of ORs.</p><p>Processing of chemosensory signals in the brain is dynamically regulated in part by an animal’s physiological state. The Matsunami lab previously reported that type 3 muscarinic acetylcholine …
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Telehealth Caregiver Training: Treating Food Selectivity without Extinction
… in their home to treat their child’s food selectivity. All three caregivers demonstrated high levels of correct performance following training and all children demonstrated increases in the number of bites consumed and decreases in disruptive behaviors. Findings suggest telehealth caregiver …
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Mixed Selectivity via Unsupervised Learning in Neural Networks
Mixed selectivity characterises neurons that simultaneously respond to different input stimuli. Neurons with mixed selectivity have been observed in multiple brain regions, and are hypothesised to play important roles in neural computation. Recently, both experimental and theoretical work …
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Werner clathrates with potential chiral selectivity : preliminary investigations
The structures of the Werner clathrate Ni(NCS)₂(α-phenylethylamine)₄, as host complex made from enantiomerically pure amine ligand and from the racemic mixture, as well as its clathrate with sec-butylbenzene have been determined by x-ray diffraction.
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