heteronuclear वाक्य
उदाहरण वाक्य
मोबाइल
- The rapid changes in proton spin create an effective heteronuclear decoupling, increasing carbon signal strength on account of the nuclear Overhauser effect ( NOE ) and simplifying the spectrum so that each nonequivalent carbon produces a singlet peak.
- With the advent of techniques for suppressing these undesired signals, inverse correlation experiments such as HSQC, HMQC, and HMBC are actually much more common today . " Normal " heteronuclear correlation spectroscopy, in which the hetronucleus spectrum is recorded, is known as HETCOR.
- A molecule may be homonuclear, that is, it consists of atoms of one chemical element, as with oxygen ( O 2 ); or it may be heteronuclear, a chemical compound composed of more than one element, as with water ( H 2 O ).
- Multidimensional heteronuclear nuclear magnetic resonance ( NMR ) spectroscopy was used to determine the structure of CBDN1 is strikingly similar to that of the bacterial 1, 3-1, 4-beta-glucanases, as well as other sugar-binding proteins with jelly-roll folds.
- For the heteronuclear version, the simplest pulse sequence used is called a M�ller Kumar Ernst ( MKE ) experiment, which has a single 90?pulse for the heteronucleus for the preparation period, no mixing period, and applies a decoupling signal to the proton during the detection period.
- For a time-independent interaction, i . e . heteronuclear dipolar couplings, CSA and first-order quadrupolar couplings, the anisotropic component is greatly reduced and almost suppressed in the limit of fast spinning, i . e . when the spinning frequency is greater than the width of the interaction.
- Typically, the first experiment to be measured with an isotope-labelled protein is a 2D heteronuclear single quantum correlation ( HSQC ) spectrum, where " heteronuclear " refers to nuclei other than 1H . In theory, the heteronuclear single quantum correlation has one peak for each H bound to a heteronucleus.
- Typically, the first experiment to be measured with an isotope-labelled protein is a 2D heteronuclear single quantum correlation ( HSQC ) spectrum, where " heteronuclear " refers to nuclei other than 1H . In theory, the heteronuclear single quantum correlation has one peak for each H bound to a heteronucleus.
- Typically, the first experiment to be measured with an isotope-labelled protein is a 2D heteronuclear single quantum correlation ( HSQC ) spectrum, where " heteronuclear " refers to nuclei other than 1H . In theory, the heteronuclear single quantum correlation has one peak for each H bound to a heteronucleus.
- Moreover, the nucleus of any atom that has a net nuclear spin and that is bonded to a hydrogen atom could potentially be imaged via heteronuclear magnetization transfer MRI that would image the high-gyromagnetic-ratio hydrogen nucleus instead of the low-gyromagnetic-ratio nucleus that is bonded to the hydrogen atom.
- Historically, Wilkinson's catalyst has been a paradigm in catalytic studies leading to several advances in the field such as the implementation of the some of the first heteronuclear magnetic resonance studies for its structural elucidation in solution ( 31P ), parahydrogen-induced polarization spectroscopy to determine the nature of transient reactive species, or one of the first detailed kinetic investigation by Halpern to elucidate the mechanism.
- Accuracy of integration can be improved by inserting a chiral derivatizing agent with a nucleus other than hydrogen or carbon, then reading the heteronuclear NMR spectrum : for example fluorine-19 NMR or phosphorus-31 NMR . Mosher's acid contains a-CF 3 group, so if the adduct has no other fluorine atoms, the 19 F NMR of a racemic mixture shows just two peaks, one for each stereoisomer.
- In 1980 Bodenhausen and D . J . Ruben introduced the HSQC ( Heteronuclear Single Quantum Coherence ) experiment, which produces two-dimensional ( 2D ) spectrum with one axis for proton ( 1 H ) and the other for a heteronucleus, usually 15 N . This double INEPT has been the base for most of the subsequent heteronuclear single quantum experiments published in the literature and it has proven pivotal in the spectroscopy organic chemistry and in in the field of protein NMR.
- In 1980 Bodenhausen and D . J . Ruben introduced the HSQC ( Heteronuclear Single Quantum Coherence ) experiment, which produces two-dimensional ( 2D ) spectrum with one axis for proton ( 1 H ) and the other for a heteronucleus, usually 15 N . This double INEPT has been the base for most of the subsequent heteronuclear single quantum experiments published in the literature and it has proven pivotal in the spectroscopy organic chemistry and in in the field of protein NMR.
- It was not until 2011 that a link between severe pain, neuroinflammation and alarm pheromones release in rats was found : real time RT-PCR analysis of rat brain tissues indicated that shocking the footpad of a rat increased its production of proinflammatory cytokines in deep brain structures, namely of IL-1?, heteronuclear Corticotropin-releasing hormone and c-fos mRNA expressions in both the paraventricular nucleus and the bed nucleus of the stria terminalis, and it increased stress hormone levels in plasma ( corticosterone ).
- He developed accordion-optimized long-range heteronuclear shift correlation methods to provide experimental access to small long-range heteronuclear couplings for the characterization of proton- deficient molecular structures, to experimentally access 4J heteronuclear couplings, to differentiate two-bond from three-bond long-range couplings to protonated carbons, to measure long-range heteronuclear couplings and to provide a reliable means of observing long-range proton-nitrogen correlations without concern for the variability of long-range proton nitrogen coupling constants.
- He developed accordion-optimized long-range heteronuclear shift correlation methods to provide experimental access to small long-range heteronuclear couplings for the characterization of proton- deficient molecular structures, to experimentally access 4J heteronuclear couplings, to differentiate two-bond from three-bond long-range couplings to protonated carbons, to measure long-range heteronuclear couplings and to provide a reliable means of observing long-range proton-nitrogen correlations without concern for the variability of long-range proton nitrogen coupling constants.
- He developed accordion-optimized long-range heteronuclear shift correlation methods to provide experimental access to small long-range heteronuclear couplings for the characterization of proton- deficient molecular structures, to experimentally access 4J heteronuclear couplings, to differentiate two-bond from three-bond long-range couplings to protonated carbons, to measure long-range heteronuclear couplings and to provide a reliable means of observing long-range proton-nitrogen correlations without concern for the variability of long-range proton nitrogen coupling constants.
- He developed accordion-optimized long-range heteronuclear shift correlation methods to provide experimental access to small long-range heteronuclear couplings for the characterization of proton- deficient molecular structures, to experimentally access 4J heteronuclear couplings, to differentiate two-bond from three-bond long-range couplings to protonated carbons, to measure long-range heteronuclear couplings and to provide a reliable means of observing long-range proton-nitrogen correlations without concern for the variability of long-range proton nitrogen coupling constants.
- The two-dimensional spectrum that results from the COSY experiment shows the frequencies for a single isotope, most commonly hydrogen ( 1 H ) along both axes . ( Techniques have also been devised for generating heteronuclear correlation spectra, in which the two axes correspond to different isotopes, such as 13 C and 1 H . ) COSY spectra show two types of peaks . " Diagonal peaks " have the same frequency coordinate on each axis and appear along the diagonal of the plot, while " cross peaks " have different values for each frequency coordinate and appear off the diagonal.
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