Patent application number | Description | Published |
20090039883 | Singlet-state exchange NMR spectroscopy for the study of very slow dynamic proceses - A nuclear magnetic resonance (NMR) method for singlet-state exchange NMR-spectroscopy comprises steps of excitation of single-quantum in-phase coherences, generation of single-quantum anti-phase coherences, excitation of zero-quantum coherences ZQ | 02-12-2009 |
20100052673 | Efficient heteronuclear decoupling by quenching rotary resonance in solid-state NMR - A method for heteronuclear decoupling in fast magic-angle spinning NMR measurements comprises application of a decoupling RF-pulse sequence with a decoupling-field amplitude ν | 03-04-2010 |
20110001475 | Methods for nuclear magnetic resonance (NMR) or magnetic resonance imaging (MRI) measurements using long-lived states - A method for nuclear magnetic resonance (NMR) or magnetic resonance imaging (MRI) measurements, includes creation of enhanced polarization of nuclei of a first kind within a sample in a magnetic field at cryogenic temperatures and transfer of the polarised sample to room temperature. The enhanced polarization of nuclei of the first kind is thereby transformed into long-lived states (LLS) of nuclei of a second kind and these LLS are sustained. The LLS is at least partially converted into observable magnetisation and an NMR or MRI measurement is carried out. The method allows one to extend the time needed between hyperpolarised magnetisation and NMR detection. | 01-06-2011 |
20110001477 | Method for nuclear magnetic resonance (NMR) spectroscopy measurements using long-lived coherences (LLC) - A method for nuclear magnetic resonance (NMR) spectroscopy of a sample comprises preparation of the sample and carrying out an NMR spectroscopy measurement. Preparation includes excitation of long lived coherences (LLC) between the singlet state S | 01-06-2011 |
20110175611 | Method for NMR spectroscopy or MRI measurements using dissolution dynamic nuclear polarization (DNP) with scavenging of free radicals - A method for sample preparation for magnetic resonance measurements using Hyperpolarization by Dissolution Dynamic Nuclear Polarization, involves preparation of frozen beads of a first kind containing paramagnetic substances in addition to the solute under investigation; insertion of the frozen beads into a polarizing magnet; creation of enhanced polarization of nuclei in a magnetic field; heating of the sample to room temperature; transfer of the sample to an MR magnet; and carrying out an MR measurement. In addition, frozen beads of a second kind containing a reducing agent are prepared and inserted into the polarization magnet together with the frozen beads of the first kind. By this method, longitudinal and transverse relaxation times in NMR are extended and free radicals in hyperpolarized solutions are eliminated. | 07-21-2011 |
20120098537 | High Resolution Nuclear Magnet Resonance with Unknown Spatiotemporal Variations of the Static Magnetic Field - The invention relates to nuclear magnetic resonance spectroscopy (NMR). NMR experiments are usually carried out in homogeneous magnetic fields. In many cases however, the inherent heterogeneity of the samples or living organisms under investigation, and the poor homogeneity of the magnets (particularly when bulky samples must be placed outside their bores), make it virtually impossible to obtain high-resolution spectra. Unstable power supplies and vibrations arising from cooling can lead to field fluctuations in time as well as space. Here it is shown how high-resolution NMR spectra can be obtained in inhomogeneous fields with unknown spatiotemporal variations. The method of the invention, based on coherence transfer between spins, can accommodate spatial inhomogeneities of at least 11 G/cm and temporal fluctuations slower than 2 Hz. | 04-26-2012 |
20120229137 | Method for NMR spectroscopy - A method for performing magnetic resonance spectroscopy on solid samples containing nuclei of interest with spin quantum number I subjects the sample to a static magnetic field. The sample is spun at the magic angle and broad-band excitation of transverse magnetization of the nuclei of interest is effected by applying a first train of rotor-synchronized rf-pulses, having a carrier frequency, to the nuclei of interest with a pulse duration 0.1 μs<τ | 09-13-2012 |
20120286782 | Method for NMR spectroscopy with sustained induction decays of long-lived coherences - A method for nuclear magnetic resonance (NMR) spectroscopy of a sample involves excitation of long lived coherences (LLC) between the singlet state S | 11-15-2012 |
20130021031 | Fourier Tickling For Homonuclear Decoupling in NMR - A method for high resolution NMR (=nuclear magnetic resonance) measurements using the application of excitation pulses and the acquisition of data points, whereby a dwell time Δt separates the acquisition of two consecutive data points, which is characterized in that one or more tickling rf (=radio frequency) pulses of duration τ | 01-24-2013 |
20130274111 | Method and device for rapid DNP - A method for producing hyperpolarized sample material for use in magnetic resonance investigations involves preparing a target material containing high γ nuclei with a short T | 10-17-2013 |
20140091792 | Method for hyperpolarization transfer in the liquid state - A method for producing a hyperpolarized sample for use in a magnetic resonance investigation has the following steps: a) providing a solid sample ( | 04-03-2014 |