A T.sub.1-T.sub.2* measurement which permits speciation of different components with restricted mobility in samples where a T.sub.1-T.sub.2 measurement is impossible is disclosed. Tracking the T.sub.1-T.sub.2* coordinate, and associated signal intensity changes, can reveal additional structural and/or dynamic information such as phase changes in rigid/semi-rigid biopolymer samples or pore level changes in morphology of the water environments in cement-based materials. In another aspect, the T.sub.1-T.sub.2* measurement may also be employed to discriminate composition in solid mixtures, a very significant analytical problem in industry. In a further aspect, the T.sub.1-T.sub.2* measurement has particular value in permitting a simple assignment of T.sub.1 to different T.sub.2* populations.

The invention relates to a method for adjusting an apparatus for treatment using nuclear magnetic resonances. The chronotype of the user is determined. The apparatus is adjusted on the basis of this determination.

The invention relates to a method for adjusting an apparatus for treatment using nuclear magnetic resonances. The chronotype of the user is determined. The apparatus is adjusted on the basis of this determination.

Nuclear spins of particular atoms (14N) which distinctively exist in a crystal of an active pharmaceutical ingredient is manipulated, so that an initial magnetization (modulated magnetization) is caused in nearby hydrogen atoms which exist near the particular atoms in the crystal. The initial magnetization of the nearby hydrogen atoms is spread to peripheral hydrogen atoms which exist at a periphery of the nearby hydrogen atoms in the crystal. A magnetization which is spread in the crystal is directly or indirectly observed.

Nuclear spins of particular atoms (14N) which distinctively exist in a crystal of an active pharmaceutical ingredient is manipulated, so that an initial magnetization (modulated magnetization) is caused in nearby hydrogen atoms which exist near the particular atoms in the crystal. The initial magnetization of the nearby hydrogen atoms is spread to peripheral hydrogen atoms which exist at a periphery of the nearby hydrogen atoms in the crystal. A magnetization which is spread in the crystal is directly or indirectly observed.

A method of estimating a wettability characteristic of a rock and fluid system includes acquiring a sample of the rock material, performing a first nuclear magnetic resonance (NMR) measurement of the sample when the sample is in a full water saturation condition, and measuring a first T2 distribution, performing a second NMR measurement of the sample when the sample is in a second partial saturation condition, and measuring a second T2 distribution. The method also includes separating a hydrocarbon component of the second T2 distribution from a water component of the second T2 distribution, applying a fluid substitution model to the water component of the second T2 distribution to generate a computed T2 distribution, and calculating a wettability index (WI) based on a difference between the first T2 distribution and the computed T2 distribution.

Methods and systems are provided that combine NMR and IR spectroscopy measurements on a rock sample to determine data representing at least one property of the rock sample. In one embodiment, cuttings can be split into first and second lots. Results of an NMR measurement performed on the first lot of cuttings without cleaning can be analyzed to determine pore volume of the cuttings. Results of an IR spectroscopy measurement performed on the second lot of cuttings after solvent cleaning can be analyzed to determine matrix density of the cuttings. Porosity can be determined from the pore volume and matrix density of the cuttings. In another embodiment, combined NMR and IR spectroscopy measurements can be performed on an unprepared rock sample (without solvent cleaning) to characterize properties of kerogen in the rock sample and porosity. In another aspect, a method is provided that employs multi-nucleic NMR measurements to determine porosity.

Systems and methods of quantum sensing include obtaining information regarding a target signal in electronic spin states of quantum defects in an ensemble of quantum defects, mapping the information regarding the target signal from the electronic spin states of the quantum defects to corresponding nuclear spin states associated with the quantum defects, applying a light pulse to the ensemble of quantum defects to reset the electronic spin states of the quantum defects, and repeating a readout stage a plurality of times within a readout duration. The readout stage includes mapping the information regarding the target signal back from the nuclear spin states to the corresponding electronic spin states and applying a data acquisition readout pulse to optically measure the electronic spin states of the quantum defects.

The present invention discloses a method of species identification and quality detection of liquid-like samples based on nuclear magnetic resonance technology. In this invention, a two-dimensional relaxation signal containing the .sup.1H T.sub.1 and T.sub.2 relaxation properties of liquid-like samples is obtained by applying a specially designed composite pulse sequence to liquid-like samples, and a fingerprint spectrum from this signal is established. The fingerprint spectrum can be associated with the essential characteristics of the tested sample, thus can be used to distinguish a specific liquid-like sample from the others. The fingerprint spectrum can be easily converted into a digital form, which is not only suitable for constructing big data of fingerprint spectrum for liquid-like samples, but also can be used for quality detection and authenticity judgment of liquid-like samples based on artificial intelligence. The present invention has the advantages of no need for sample pretreatment, non-destructive sample testing, convenience, quickness, excellent operability, good stability and reproducibility, etc., which can be used for species identification and quality detection of a variety of liquid-like samples, which has a wide application value.

The present invention discloses a method of species identification and quality detection of liquid-like samples based on nuclear magnetic resonance technology. In this invention, a two-dimensional relaxation signal containing the .sup.1H T.sub.1 and T.sub.2 relaxation properties of liquid-like samples is obtained by applying a specially designed composite pulse sequence to liquid-like samples, and a fingerprint spectrum from this signal is established. The fingerprint spectrum can be associated with the essential characteristics of the tested sample, thus can be used to distinguish a specific liquid-like sample from the others. The fingerprint spectrum can be easily converted into a digital form, which is not only suitable for constructing big data of fingerprint spectrum for liquid-like samples, but also can be used for quality detection and authenticity judgment of liquid-like samples based on artificial intelligence. The present invention has the advantages of no need for sample pretreatment, non-destructive sample testing, convenience, quickness, excellent operability, good stability and reproducibility, etc., which can be used for species identification and quality detection of a variety of liquid-like samples, which has a wide application value.