Spectroscopic monitoring of the cellular internalization of paramagnetic ions and their complexes: a perifused cells and perfused organs approach.
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Adenosine Triphosphate↗
Biomedical subjects
Y van Haverbeke
Publications and source records attributed to Y van Haverbeke.
Optimization schemes for selective excitations: application to the DIGGER pulses.
In this work, two distinct approaches to the tailoring of selective radiofrequency (RF) pulses were applied to a cos-sinc pulse of the DIGGER sequence used in localized spectroscopy. Ideally, three such pulses combined with a gradient in each direction destroy the Mz component of the magnetization everywhere but in the volume of interest. In the first approach, the optimal RF amplitude modulation is found by minimizing the difference between the ideal and the computed Mz profiles. In the second strategy, the RF pulse envelope is adjusted by optimization of the tip angle profile. Computed slice profiles optimized by each of these methods have been compared to experimental results. Simulations as well as experiments show that the second approach, which optimizes tip angles, is the most efficient.
Magnetic Resonance Spectroscopy↗
Mitosis-to-G1 phase transition of HTC cells obtained with nocodazole (R 17934; NSC 238159). Spin-lattice relaxation time and cytofluorometric analysis.
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Animals↗
Study of complex marine sterol mixtures by mass-analyzed ion kinetic energy spectrometry.
Mass-analyzed ion kinetic energy spectrometry (MIKE) is shown to be an efficient and rapid method for the analysis of complex sterol mixtures. The method has been applied to the study of the free sterol fractions of five marine and one freshwater invertebrates.
Animals↗