Results 31 to 40 of about 955,121 (302)
Frontiers in Physics, 2017 In vivo13C magnetic resonance spectroscopy (MRS) is a unique and effective tool for studying dynamic human brain metabolism and the cycling of neurotransmitters.
Ningzhi Li, Shizhe Li, Jun Shen
doaj +1 more source
Electron spin decoherence of single Nitrogen-Vacancy defects in diamond
, 2008 We present a theoretical analysis of the electron spin decoherence in single Nitrogen-Vacancy defects in ultra-pure diamond. The electron spin decoherence is due to the interactions with Carbon-13 nuclear spins in the diamond lattice.
Lukin, M. D., Maze, J. R., Taylor, J. M.
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Diagnosis of Helicobacter pylori by carbon-13 urea breath test using a portable mass spectrometer [PDF]
, 2015 CONTEXT: In the non-invasive detection of markers of disease, mass spectrometry is able to detect small quantities of volatile markers in exhaled air. However, the problem of size, expense and immobility of conventional mass spectrometry equipment has ...
Bliss, P +7 more
core +2 more sources
Isotopic carbon turnover in pig hoof and rib
Acta Scientiarum: Animal Sciences, 2021 The objective of this study was to evaluate the behavior of carbon incorporation and turnover in hoof and ribs of pigs at different periods of development in the search for tissues that reflect longer the former diet.
Regina Maria Nascimento Augusto Blaitt +6 more
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The effects of thermohaline mixing on low-metallicity asymptotic giant branch stars
, 2009 We examine the effects of thermohaline mixing on the composition of the envelopes of low-metallicity asymptotic giant branch (AGB) stars. We have evolved models of 1, 1.5 and 2 solar masses from the pre-main sequence to the end of the thermally pulsing ...
Abia +50 more
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Brazilian Journal of Poultry Science, 2010 Our goal was to trace the inclusion of poultry offal meal (OM) in diets by using carbon (13C/12C) and nitrogen (15N/14N) isotopic ratios of different tissues in order to contribute for the development of an independent technology for the certification of
RP Oliveira +7 more
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Studies on carbon-13 turnover in eggs and blood of commercial layers
Brazilian Journal of Poultry Science, 2006 This paper aimed at evaluating the influence of diets containing different isotopic values of carbon-13 turnover on the half-life of egg (yolk + albumen), yolk and albumen individually, and blood of poultry using delta‰13C isotopic variation.
JC Denadai +5 more
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Transformation and fate of microphytobenthos carbon in subtropical, intertidal sediments: potential for long-term carbon retention revealed by 13C-labeling [PDF]
Biogeosciences, 2014 Microphytobenthos (MPB) are ubiquitous in coastal sediments, but the fate of their production (carbon biomass) is poorly defined. The processing and fate of MPB-derived carbon in subtropical intertidal sediments was investigated through in situ labeling ...
J. M. Oakes, B. D. Eyre
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Substituent effects on the nitrogen-15 and carbon-13 shieldings of some N-arylguanidinium chlorides [PDF]
, 1980 The 13C and 15N chemical shifts of five N-arylguanidinium chlorides carrying polar substituents, ranging in character from 4-methoxy to 4-nitro groups, have been determined by NMR spectroscopy at the natural-abundance level of 13C and 15N in dimethyl ...
Botto, Robert E. +2 more
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Pediatric Blood &Cancer, EarlyView.ABSTRACT Introduction Pulmonary dysfunction and sleep abnormalities are common in children with sickle cell disease (SCD) and are associated with worse clinical outcomes. Whether spirometry abnormalities are associated with polysomnography (PSG) findings remains unclear.
Ammar Saadoon Alishlash +4 more
wiley +1 more source