Terms: NMR Ultrasound (738), ultrasound nmr (376),
Concept: Illuminate a substance with acoustic, particularly ultrasonic, waves, then detect the magnetic resonance signal. Sound takes a while, so the physical shape and character of the substance can be resolved.
The ultrasound can be used instead of rotation to narrow the lines in solids.
Concept: multiaxis (3D) parametric vibration of the sample can be made equivalent, or more powerful, than magic angle spinning. MAS can be also achieved with multiaxis parametric rotation of the magnetic field.
Terms: nmr active (17,800), nmr properties (201,000), nmr table (1,800),
Proctor W.G., Yu F.C., The Dependence of a Nuclear Magnetic Resonance Frequency upon Chemical Compounds, Phys.Rev. 77, 717 (1950).
Discovery of chemical shifts (14N and 15N). Read Proctor's personal account
Boolean: nmr +ultrasound (336,000), nmr +ultrasonic (228,000), nmr +ultrasonic +millisecond (674), nmr +ultrasonic +microsecond (852), nmr +ultrasonic +nanosecond (1,320),
Terms: nuclear spin absorption (5), spectral moments (25,900),
Terms: nmr of coal (16), nmr of rock (2), nmr of trees (6), nmr of wood (31), nmr of food (16), nmr of (394,000),
Boolean: nmr +coal (282,000), nmr +rock (537,000), nmr +trees (342,000), nmr +wood (670,000), nmr +food (1,790,000), nmr +petroleum (448,000), nmr +lignite (25,400), nmr +urine (292,000), nmr +blood (1,520,000), nmr +meat (184,000), nmr +vegetables (133,000), nmr +waste (649,000), nmr +cells (2,750,000), nmr +alcohols (392,000), nmr +solids (872,000), nmr +liquids (592,000), nmr +crystals (1,040,000), nmr +superconductor (180,000), nmr +hydrocarbons (416,000), nmr +aromatic (967,000), nmr +aliphatic (328,000), nmr +polymers (1,290,000), nmr +ribonuclease (131,000), nmr +boranes (29,800), nmr +gasoline (95,800), nmr +radiation (1,340,000), nmr +decomposition (544,000),
Boolean: nmr +soil (613,000), nmr +geological (283,000), nmr +planets (121,000), nmr +lunar (37,200), nmr +martian (28,400), "magnetic resonance sounding" (1,060), "magnetic resonance surveys" (6),
Boolean: nmr +water (3,510,000), nmr +pipeline (234,000), nmr +flowing (145,000), nmr +diffusion (1,080,000),
Boolean: nmr +diffusion +ultrasonic (67,300), nmr +diffusion +ultrasound (81,700), nmr +diffusion +acoustic (104,000), nmr +diffusion +tensor (135,000),
Boolean: (nmr OR "magnetic resonance") +"baseline shifts") (801),
Terms: nmr signatures (648), ultrasonic signatures (299), acoustic signatures (71,700), influence of ultrasonic energy (37),
Boolean: ("chemical shift" OR "chemical shifts") +("electron volt" OR "electron volts") (398),
Boolean: "magnetic dipole moment" OR "magnetic moment" +(gauss OR tesla) +"electron volt" (1,050), "nuclear magnetic moments" (104,000), table +"nuclear magnetic moments" (18,900),
Boolean: masses +wapstra (25,500), "spin selective" +chemical (1,770), "spin selective" (9,380), "chemically induced" +polarization (20,800), "chemically induced" +polarisation (672),
Terms: chemically induced dynamic nuclear polarization (1,830), cidnp (21,200), chemically induced magnetic (531),
Concept: Slowly adding solvent to a sample will alter the chemical shifts. Taking a high resolution spectra over time would help characterize the unknown. Likewise changing the temperature. Likewise acoustic fields. Likewise magnetic fields from permanent magnets. Likewise pressure.
Temperature Calibration in an NMR Probe
Boolean: nmr +"chemical exchange" (44,000), nmr +"chemical environment" (33,500), nmr +"chemical shifts" (637,000), nmr +"isotopic effects" (1,710),
Boolean: nmr +"function of temperature" (98,400), "chemical shifts" +"function of temperature" (11,900), nmr +"temperature dependence" (237,000), nmr +"temperature dependencies" (2,960), nmr +temperature +shifts (554,000), nmr +"temperature calibration" (22,000), nmr +"thermal calibration" (23),
Boolean: nmr +motions +millisecond (15,900), nmr +motions +microsecond (15,600), nmr +motions +nanosecond (26,900), nmr +ultrasonic +millisecond (674), nmr +ultrasonic +microsecond (852),
Boolean: nmr +"elastic constants" (19,300), nmr +"acoustic waves" (14,600), nmr +"elastic waves" (1,950),
Boolean: nmr +carbon (2,520,000), nmr +hydrogen (2,360,000), nmr +sodium (1,340,000), nmr +chlorine (365,000), nmr +calcium (1,230,000), nmr +boron (392,000), nmr +oxygen (1,670,000),
Boolean: nmr +"solvent effects" (82,200), nmr +solvation (251,000), nmr +decomposition (545,000), nmr +"radiation effects" (29,200), nmr +heating (656,000), nmr +"ph effects" (4,100), nmr +mechanical (1,320,000), nmr +"pressure effects" (22,400), nmr +"isotopic effects" (1,710), nmr +"isotope effects" (91,300),
Boolean: nmr +linewidths (952), nmr +linewidth (989), nmr +"line widths" (808), nmr +"line width" (989),
Terms: nuclear relaxation (23,800), ultrasonic energy on the relaxation (3), saturation of nuclear (815),
Boolean: nmr +"ultrasonic excitation" (34), nmr +"vibrating magnet" (3), nmr +"moving magnet" (88), nmr +"magnet vibration" (27), nmr +"magnet motion" (4),
Boolean: nmr +"temperature induced" (28,600), nmr +"pressure induced" (42,900), nmr +"pressure dependence" (28,800), nmr +"temperature dependence" (237,000),
Boolean: "chemical shifts" +pressure (119,000), "chemical shifts" +temperature (285,000), "chemical shifts" +concentration (173,000), "chemical shifts" +solvent (222,000),
Influence of Ultrasonic Energy on the Relaxation of Chlorine Nuclei in Sodium Chlorate,
Phys.Rev. 101, 1757 (1956).
Chemical Shifts and Shyness Dec 30, 2007 - Discoverer of Chemical Shifts = W G Proctor
Proctor W.G., Tanttila W.H., Saturation of Nuclear Electric Quadrupole Energy Levels by Ultrasonic Excitation, Phys.Rev. 98, 1854 (1955).
*** Department of Physics, University of Washington, Seattle, Washington.
Proctor W.G., Tanttila W.H., Influence of Ultrasonic Energy on the Relaxation of Chlorine Nuclei in Sodium Chlorate, Phys.Rev. 101, 1757 (1956).
*** Department of Physics, University of Washington, Seattle, Washington.
*** Proctor now at Universität Basel, Basel, Switzerland.
Pressure and Temperature Dependence of NMR Chemical Shifts of Simple Ions in Solution
NMR Chemical Shifts of Common Laboratory Solvents as Trace Impurities
Noninvasive measurement of temperature and fractional dissociation of imidazole in human lower leg muscles using 1H-nuclear magnetic resonance spectroscopy -- Yoshioka et al. 98 (1): 282 -- Journal of Applied Physiology - Several noninvasive thermometers employing NMR techniques have been proposed based on the temperature dependence of NMR parameters, such as relaxation time (30), diffusion coefficient (10), chemical shift (2, 6, 8, 20), or the proton frequency method (11, 15, 19).