New Tools in Bio-NMR: Indirect Detection of Nitrogen-14 in Solids
نویسندگان
چکیده
منابع مشابه
New tools in bio-NMR: indirect detection of nitrogen-14 in solids.
This paper presents an overview of recently developed methods for the indirect detection of 14N nuclei (spin l = 1) in spinning solids by nuclear magnetic resonance spectroscopy. These methods exploit the transfer of coherence from a neighboring 'spy' nucleus with spin S = 1/2, such as 13C or 1H, to single- or double-quantum transitions of 14N nuclei. The two-dimensional correlation methods pre...
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Coherence transfer from 'spy nuclei' such as (1)H or (13)C (S=1/2) was used to excite single- or double-quantum coherences of (14)N nuclei (I=1) while the S spins were aligned along the static field, in the manner of heteronuclear single-quantum correlation (HSQC) spectroscopy. For samples spinning at the magic angle, coherence transfer can be achieved through a combination of scalar couplings ...
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A method for enhancing the sensitivity of 15N spectra of nonspinning solids through 1H indirect detection is introduced. By sampling the 1H signals in the windows of a pulsed spin-lock sequence, high-sensitivity 1H spectra can be obtained in two-dimensional (2D) spectra whose indirect dimension yields the 15N chemical shift pattern. By sacrificing the 1H chemical shift information, sensitivity ...
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Reaction constants and heat release during thermophilic aerobic digestion of typical secondary and mixed sludges were determined. Maximum reaction constant, determined by measuring the amounts of biodegradable volatile suspended solids (bVSS) removed, occurred in the temperature range of 55-60 ºC. Measurement of heat releases were carried out, at the same range, by the aid of a temperature ...
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ژورنال
عنوان ژورنال: CHIMIA International Journal for Chemistry
سال: 2010
ISSN: 0009-4293
DOI: 10.2533/chimia.2010.157