100 relations: Acronym, Angular momentum coupling, Aromaticity, Atom, Atomic mass unit, Atomic nucleus, Benchtop nuclear magnetic resonance spectrometer, Carbohydrate, Carbon-13, Carbon-13 nuclear magnetic resonance, Color reaction, Conformation activity relationship, Cyclic compound, Degenerate energy levels, Deuterium, Dihedral angle, Distance geometry problem, DNA, Earth's field NMR, Edward Mills Purcell, Electromagnetic radiation, Felix Bloch, Fourier transform, Free induction decay, Functional group, Functional magnetic resonance spectroscopy of the brain, Glycosidic bond, Harvard University, Hertz, Heteronuclear single quantum coherence spectroscopy, Hydrocarbon, Hydrogen bond, Hyperfine structure, In vivo magnetic resonance spectroscopy, Integral, Intrinsically disordered proteins, Isotope, J-coupling, John Pople, Karplus equation, Liquid helium, Low field nuclear magnetic resonance, Magic angle, Magic angle spinning, Magnetic resonance imaging, Magnetism, Millisecond, Molecule, Nitrogen-15 nuclear magnetic resonance spectroscopy, NMR tube, ..., Nobel Prize in Physics, Nuclear magnetic moment, Nuclear magnetic resonance, Nuclear magnetic resonance crystallography, Nuclear magnetic resonance spectra database, Nuclear magnetic resonance spectroscopy of carbohydrates, Nuclear magnetic resonance spectroscopy of nucleic acids, Nuclear magnetic resonance spectroscopy of proteins, Nuclear magnetic resonance spectroscopy of stereoisomers, Nuclear Overhauser effect, Nuclear quadrupole resonance, Nucleic acid, Nucleic acid double helix, Nucleic acid tertiary structure, Order of magnitude, Organic chemistry, Organic compound, Paramagnetic nuclear magnetic resonance spectroscopy, Parts-per notation, Pascal's triangle, Phosphorus-31 nuclear magnetic resonance, Polar effect, Pople notation, Protein, Proton, Proton nuclear magnetic resonance, Pseudoknot, Pulsed field magnet, Relaxation (NMR), Richard R. Ernst, RNA, Shim (magnetism), Signal-to-noise ratio, Small molecule, Solid-state chemistry, Solution, Spin (physics), Spin quantum number, Stanford University, Stem-loop, Structural biology, Superconductivity, Tesla (unit), Tetramethylsilane, Triple-resonance nuclear magnetic resonance spectroscopy, Two-dimensional nuclear magnetic resonance spectroscopy, University of California, Irvine, University of Cambridge, Wet chemistry, X-ray crystallography. Expand index (50 more) » « Shrink index
An acronym is an abbreviation, used as a word, which is formed from the initial components in a phrase or a word.
In quantum mechanics, the procedure of constructing eigenstates of total angular momentum out of eigenstates of separate angular momenta is called angular momentum coupling.
In organic chemistry, the term aromaticity is formally used to describe an unusually stable nature of some flat rings of atoms.
An atom is the smallest constituent unit of ordinary matter that has the properties of a chemical element.
The unified atomic mass unit (symbol: u) or dalton (symbol: Da) is the standard unit that is used for indicating mass on an atomic or molecular scale (atomic mass).
The nucleus is the small, dense region consisting of protons and neutrons at the center of an atom.
A Benchtop nuclear magnetic resonance spectrometer (Benchtop NMR spectrometer) refers to a Fourier transform nuclear magnetic resonance (FT-NMR) spectrometer that is significantly more compact and portable than the conventional equivalents, such that it is portable and can reside on a laboratory benchtop.
A carbohydrate is a biological molecule consisting of carbon (C), hydrogen (H) and oxygen (O) atoms, usually with a hydrogen:oxygen atom ratio of 2:1 (as in water); in other words, with the empirical formula (where m could be different from n).
Carbon-13 (13C) is a natural, stable isotope of carbon with a nucleus containing 6 protons and 7 neutrons.
Carbon-13 nuclear magnetic resonance most commonly known as carbon-13 NMR or 13C NMR or sometimes simply referred to as carbon NMR is the application of nuclear magnetic resonance (NMR) spectroscopy to carbon.
In chemistry, a color reaction or colour reaction is a chemical reaction that is used to transform colorless chemical compounds into colored derivatives which can be detected visually or with the aid of a colorimeter.
Conformation-activity relationship is the relationship between the biological activity and the conformation or conformational changes of a biomolecule.
A cyclic compound (ring compound) is a term for a compound in the field of chemistry in which one or more series of atoms in the compound is connected to form a ring.
In quantum mechanics, an energy level is said to be degenerate if it corresponds to two or more different measurable states of a quantum system.
Deuterium (symbol or, also known as heavy hydrogen) is one of two stable isotopes of hydrogen.
In geometry, a dihedral or torsion angle is the angle between two hyperplanes.
The distance geometry problem is the characterization and study of sets of points based only on given values of the distances between member pairs.
Deoxyribonucleic acid (DNA) is a molecule that carries most of the genetic instructions used in the development, functioning and reproduction of all known living organisms and many viruses.
Nuclear magnetic resonance (NMR) in the geomagnetic field is conventionally referred to as Earth's field NMR (EFNMR).
Edward Mills Purcell (August 30, 1912 – March 7, 1997) was an American physicist who shared the 1952 Nobel Prize for Physics for his independent discovery (published 1946) of nuclear magnetic resonance in liquids and in solids.
Electromagnetic radiation (EM radiation or EMR) is the radiant energy released by certain electromagnetic processes.
Felix Bloch (23 October 1905 – 10 September 1983) was a Swiss born American physicist, working mainly in the U.S. He and Edward Mills Purcell were awarded the 1952 Nobel Prize for "their development of new ways and methods for nuclear magnetic precision measurements."Sohlman, M (Ed.) Nobel Foundation directory 2003. Vastervik, Sweden: AB CO Ekblad; 2003.
The Fourier transform decomposes a function of time (a signal) into the frequencies that make it up, similarly to how a musical chord can be expressed as the amplitude (or loudness) of its constituent notes.
In Fourier transform nuclear magnetic resonance spectroscopy, free induction decay (FID) is the observable NMR signal generated by non-equilibrium nuclear spin magnetization precessing about the magnetic field (conventionally along z).
In organic chemistry, functional groups are specific groups (moieties) of atoms or bonds within molecules that are responsible for the characteristic chemical reactions of those molecules.
Functional magnetic resonance spectroscopy of the brain (fMRS) uses magnetic resonance imaging (MRI) to study brain metabolism during brain activation.
In chemistry, a glycosidic bond is a type of covalent bond that joins a carbohydrate (sugar) molecule to another group, which may or may not be another carbohydrate.
Harvard University is a private Ivy League research university in Cambridge, Massachusetts, established in 1636.
The hertz (symbol Hz) is the unit of frequency in the International System of Units (SI) and is defined as one cycle per second.
The Heteronuclear Single Quantum Coherence (HSQC) or Heteronuclear Single Quantum Correlation experiment is used frequently in NMR spectroscopy of organic molecules and is of particular significance in the field of protein NMR.
In organic chemistry, a hydrocarbon is an organic compound consisting entirely of hydrogen and carbon.
A hydrogen bond is the electrostatic attraction between polar molecules that occurs when a hydrogen (H) atom bound to a highly electronegative atom such as nitrogen (N), oxygen (O) or fluorine (F) experiences attraction to some other nearby highly electronegative atom.
In atomic physics, hyperfine structure is the different effects leading to small shifts and splittings in the energy levels of atoms, molecules and ions.
In vivo (that is 'in the living organism') magnetic resonance spectroscopy (MRS) is a specialised technique associated with magnetic resonance imaging (MRI).
The integral is an important concept in mathematics.
An intrinsically disordered protein (IDP) is a protein that lacks a fixed or ordered three-dimensional structure.
Isotopes are variants of a particular chemical element which differ in neutron number, although all isotopes of a given element have the same number of protons in each atom.
Scalar or J-couplings (also called indirect dipole dipole coupling) are mediated through chemical bonds connecting two spins.
Sir John Anthony Pople, (31 October 1925 – 15 March 2004) was a theoretical chemist who was awarded the Nobel Prize in Chemistry with Walter Kohn in 1998 for his development of computational methods in quantum chemistry.
The Karplus equation, named after Martin Karplus, describes the correlation between 3J-coupling constants and dihedral torsion angles in nuclear magnetic resonance spectroscopy: where J is the 3J coupling constant, \phi is the dihedral angle, and A, B, and C are empirically derived parameters whose values depend on the atoms and substituents involved.
The chemical element helium exists in a liquid form only at the extremely low temperature of −269 °C (about 4 K or −452.2 °F).
Low field NMR spans a range of different nuclear magnetic resonance (NMR) modalities, going from NMR conducted in permanent magnets, supporting magnetic fields of a few T, all the way down to zero field NMR, where the Earth's field is carefully shielded such that magnetic fields of nT are achieved where nuclear spin precession is close to zero.
The magic angle is a precisely defined angle, the value of which is approximately 54.7356°.
In nuclear magnetic resonance, magic-angle spinning (MAS) is a technique often used to perform experiments in solid-state NMR spectroscopy.
Magnetic resonance imaging (MRI), nuclear magnetic resonance imaging (NMRI), or magnetic resonance tomography (MRT) is a medical imaging technique used in radiology to investigate the anatomy and physiology of the body in both health and disease.
Magnetism is a class of physical phenomena that are mediated by magnetic fields.
A millisecond (from milli- and second; symbol: ms) is a thousandth (0.001 or 10−3 or 1/1,000) of a second.
A molecule (from Latin moles "mass") is an electrically neutral group of two or more atoms held together by chemical bonds.
Nitrogen-15 nuclear magnetic resonance spectroscopy (nitrogen-15 NMR spectroscopy, or just simply 15N NMR) is a version of nuclear magnetic resonance spectroscopy that examines samples containing the 15N nucleus.
An NMR tube is a thin glass walled tube used to contain samples in nuclear magnetic resonance spectroscopy.
The Nobel Prize in Physics (Nobelpriset i fysik) is a yearly award given by the Royal Swedish Academy of Sciences for those who conferred the most outstanding contributions for mankind in the field of physics.
The nuclear magnetic moment is the magnetic moment of an atomic nucleus and arises from the spin of the protons and neutrons.
Nuclear magnetic resonance (NMR) is a physical phenomenon in which nuclei in a magnetic field absorb and re-emit electromagnetic radiation.
Nuclear magnetic resonance crystallography (NMR crystallography) is a method which utilizes primarily NMR spectroscopy to determine the structure of solid materials on the atomic scale.
A nuclear magnetic resonance spectra database is an electronic repository of information concerning Nuclear magnetic resonance (NMR) spectra.
Carbohydrate NMR Spectroscopy is the application of nuclear magnetic resonance (NMR) spectroscopy to structural and conformational analysis of carbohydrates.
Nucleic acid NMR is the use of nuclear magnetic resonance spectroscopy to obtain information about the structure and dynamics of nucleic acid molecules, such as DNA or RNA.
Nuclear magnetic resonance spectroscopy of proteins (usually abbreviated protein NMR) is a field of structural biology in which NMR spectroscopy is used to obtain information about the structure and dynamics of proteins, and also nucleic acids, and their complexes.
Nuclear magnetic resonance spectroscopy of stereoisomers most commonly known as NMR spectroscopy of stereoisomers is a chemical analysis method that uses NMR spectroscopy to determine the absolute configuration of stereoisomers.
The Nuclear Overhauser Effect (NOE) is the transfer of nuclear spin polarization from one nuclear spin population to another via cross-relaxation.
Nuclear quadrupole resonance spectroscopy or NQR is a chemical analysis technique related to nuclear magnetic resonance (NMR).
Nucleic acids are biopolymers, or large biomolecules, essential for all known forms of life.
In molecular biology, the term double helix refers to the structure formed by double-stranded molecules of nucleic acids such as DNA.
Orders of magnitude are written in powers of 10.
Organic chemistry is a chemistry subdiscipline involving the scientific study of the structure, properties, and reactions of organic compounds and organic materials, i.e., matter in its various forms that contain carbon atoms.
An organic compound is any member of a large class of gaseous, liquid, or solid chemical compounds whose molecules contain carbon.
Paramagnetic NMR spectroscopy refers to NMR spectroscopy of paramagnetic compounds.
In science and engineering, the parts-per notation is a set of pseudo units to describe small values of miscellaneous dimensionless quantities, e.g. mole fraction or mass fraction.
In mathematics, Pascal's triangle is a triangular array of the binomial coefficients.
Phosphorus-31 NMR spectroscopy (NMR stands for nuclear magnetic resonance) is an analytical technique.
The Polar effect or electronic effect in chemistry is the effect exerted by a substituent on modifying electrostatic forces operating on a nearby reaction center.
The Pople notation is named after the Nobel laureate John Pople and is a simple method of presenting second-order spin coupling systems in NMR.
Proteins are large biomolecules, or macromolecules, consisting of one or more long chains of amino acid residues.
Proton nuclear magnetic resonance (proton NMR, hydrogen-1 NMR, or 1H NMR) is the application of nuclear magnetic resonance in NMR spectroscopy with respect to hydrogen-1 nuclei within the molecules of a substance, in order to determine the structure of its molecules.
A pseudoknot is a nucleic acid secondary structure containing at least two stem-loop structures in which half of one stem is intercalated between the two halves of another stem.
A pulsed field magnet is a strong electromagnet which is powered by a brief pulse of electric current through its windings rather than a continuous current, producing a brief but strong pulse of magnetic field.
In nuclear magnetic resonance (NMR) spectroscopy and magnetic resonance imaging (MRI) the term relaxation describes how signals change with time.
Richard Robert Ernst (born August 14, 1933) is a Swiss physical chemist and Nobel Laureate.
Ribonucleic acid (RNA) is a polymeric molecule implicated in various biological roles in coding, decoding, regulation, and expression of genes.
A shim is a device used to adjust the homogeneity of a magnetic field.
Signal-to-noise ratio (abbreviated SNR) is a measure used in science and engineering that compares the level of a desired signal to the level of background noise.
In molecular biology and pharmacology, a small molecule is a low molecular weight organic compound that may help regulate a biological process, with a size on the order of.
Solid-state chemistry, also sometimes referred to as materials chemistry, is the study of the synthesis, structure, and properties of solid phase materials, particularly, but not necessarily exclusively of, non-molecular solids.
In chemistry, a solution is a homogeneous mixture composed of only one phase.
In quantum mechanics and particle physics, spin is an intrinsic form of angular momentum carried by elementary particles, composite particles (hadrons), and atomic nuclei.
In atomic physics, the spin quantum number is a quantum number that parameterizes the intrinsic angular momentum (or spin angular momentum, or simply spin) of a given particle.
Stanford University (officially Leland Stanford Junior University) is a private research university in Stanford, California, and one of the world's most prestigious institutions, with the top position in numerous rankings and measures in the United States.
Stem-loop intramolecular base pairing is a pattern that can occur in single-stranded DNA or, more commonly, in RNA.
Structural biology is a branch of molecular biology, biochemistry, and biophysics concerned with the molecular structure of biological macromolecules, especially proteins and nucleic acids, how they acquire the structures they have, and how alterations in their structures affect their function.
Superconductivity is a phenomenon of exactly zero electrical resistance and expulsion of magnetic fields occurring in certain materials when cooled below a characteristic critical temperature.
The tesla (symbol T) is the SI derived unit of the strength of the magnetic field, commonly denoted as B. One tesla is equal to one weber per square metre, and it was named in 1960 in honour of Nikola Tesla.
Tetramethylsilane (abbreviated as TMS) is the organosilicon compound with the formula Si(CH3)4.
Triple resonance experiments are a set of multi-dimensional nuclear magnetic resonance spectroscopy (NMR) experiments that link three types of atomic nuclei, most typically consisting of 1H, 15N and 13C.
Two-dimensional nuclear magnetic resonance spectroscopy (2D NMR) is a set of nuclear magnetic resonance spectroscopy (NMR) methods which give data plotted in a space defined by two frequency axes rather than one.
The University of California, Irvine (UCI, UC Irvine, or Irvine), is a public research university located in Irvine, California, and one of the 10 general campuses in the University of California (UC) system.
The University of CambridgeThe corporate title of the university is The Chancellor, Masters, and Scholars of the University of Cambridge.
Wet chemistry is a form of analytical chemistry that uses classical methods such as observation to analyze materials.
X-ray crystallography is a tool used for identifying the atomic and molecular structure of a crystal, in which the crystalline atoms cause a beam of incident X-rays to diffract into many specific directions.
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