Spelling suggestions: "subject:"mmr"" "subject:"rmr""
171 |
Vznik a stabilita DNA minivlásenek / The presence and stability of DNA mini-hairpinsBušková, Hana January 2021 (has links)
The secondary structure of DNA is variable and depends on the sequence of nu- cleotides in a strand. While DNA can form duplexes, formations of three, four, or even a single strand have been observed in vivo and in vitro as well. In this thesis, we study the effect of small changes of oligonucleotide sequences on the stability of hairpins formed by DNA heptamers by 1 H nuclear magnetic resonance (NMR) spectroscopy. Suitable DNA sequences were selected based on symmetry rules and stability prediction by near- est neighbor model. Two-dimensional 1 H -1 H NOESY spectra were used to assign the 1 H resonances of aromatic hydrogens. Variable-temperature 1D spectra served for ob- taining melting curves, from which the thermodynamic properties of the hairpins were determined. The presence of hairpins in the solutions was confirmed by the character of the NOESY spectra, independence of melting temperature on oligonucleotide concen- tration, and comparison of competing melting-curve models of duplex and hairpin. Our results point out the importance of the order of the stem base pairs and contribute to the description of the extraordinary stability of DNA mini-hairpins. 1
|
172 |
Development of Solid-State NMR Methodologies for Protein Structure Determination based on Paramagnetic TaggingMukhopadhyay, Dwaipayan January 2018 (has links)
No description available.
|
173 |
The Development and Application of In Situ NMR Methods for Lithium-Ion BatteriesFreytag, Annica I. January 2020 (has links)
This body of work is tackling some of the challenges in the field of lithium-ion
batteries (LIBs) for electric vehicles through in situ nuclear magnetic resonance
(NMR). In situ NMR allows for the simultaneous monitoring of both liquid and
solid components (electrolyte, cathode, anode, separator) and provides timely
data acquisition making it a great method to extract real-time information
about structural changes, degradation products and failure mechanisms in
batteries.
A combined in situ 7Li NMR and ex situ 29Si magic-angle spinning (MAS)
NMR study on silicon and silicon monoxide was used to compare structural
differences in these anode materials using a custom-made in situ cell. Some
key differences between the two materials were obtained, highlighting the
importance of in situ NMR to be used for identifying phases, which are not
present under ex situ conditions. In addition, fast charging of silicon anodes was
investigated to gain a better understanding of their performance at high current
rates. Magnetic resonance imaging was also implemented to localize lithium
metal deposition under these conditions, which was made possible by a unique
in situ parallel-plate resonator setup. Finally, the successful development of a
novel in situ MAS NMR technique is introduced, which for the first time allows
for an in situ analysis of a LIB under MAS. This strategy paves the way toward
acquisition of valuable in situ data on the formation and transformations of
metastable states within the active materials of both electrodes; data that is
difficult to obtain from static in situ NMR experiments alone. / Thesis / Doctor of Philosophy (PhD)
|
174 |
Excitations in '3HE-B at ultra-low temperaturesCousins, Derek John January 1997 (has links)
No description available.
|
175 |
New electron-poor phosphine ligands for hydroformylation and hydrocyanation catalysisMason, Katie Louise January 1997 (has links)
No description available.
|
176 |
Magnetic resonance studies of dimer liquid crystalsLe Masurier, Peter John January 1996 (has links)
No description available.
|
177 |
Magnetic resonance studies of solutes dissolved in liquid crystalsSmith, S. W. January 1987 (has links)
No description available.
|
178 |
A nuclear magnetic resonance study of orientational ordering in thermotropic liquid crystalsSachdev, H. S. January 1987 (has links)
No description available.
|
179 |
The preparation, characterisation and reactivity of derivatives of a novel sterically demanding amido ligandRofouei, Mohammad Kazem January 1997 (has links)
No description available.
|
180 |
The two-dimensional nuclear magnetic resonance spectroscopy analysis of peptides in solutionSmith, K. I. January 1986 (has links)
No description available.
|
Page generated in 0.0403 seconds