Loading...
  • measurements
  • The drug dissolution and mobility inside the gel matrix was characterised, in parallel to the 1H measurements, by 19F NMR spectroscopy and MRI, and the drug release profile in the bulk solution was recorded offline by UV spectrometer. (ovid.com)
  • molecular
  • These properties are fundamentally the same as those used in the more familiar magnetic resonance imaging (MRI) , but the molecular applications use a somewhat different approach, appropriate to the change of scale from millimeters (of interest to radiologists) to nanometers (bonded atoms are typically a fraction of a nanometer apart), a factor of a million. (wikipedia.org)
  • We set a constraint on molecular PNC in 13 C chemical shifts at a level of 10 -5 ppm, and provide a discussion of important considerations in the search for molecular PNC using NMR spectroscopy. (osti.gov)
  • vitro
  • This study represents the first quantitative multi-nuclear (1H and 19F) fast magnetic resonance imaging study of the complete dissolution process of a commercial (Lescol® XL) tablet, whose formulation is based on the hydroxypropyl methylcellulose (HPMC) polymer under in vitro conditions in a standard USP-IV (United States Pharmacopeia apparatus IV) flow-through cell that is incorporated into high field superconducting magnetic resonance spectrometer. (ovid.com)
  • Parameters
  • We here present a cost-effective and relatively rapid method for obtaining enzyme-kinetic parameters from metabolite time-course data generated using NMR spectroscopy. (sun.ac.za)
  • Journal
  • This journal publishes review articles covering applications in all these and related subjects, as well as in-depth treatments of the fundamental theory and instrumental developments of NMR spectroscopy. (scimagojr.com)
  • To receive news and publication updates for Journal of Spectroscopy, enter your email address in the box below. (hindawi.com)
  • functional
  • The intramolecular magnetic field around an atom in a molecule changes the resonance frequency, thus giving access to details of the electronic structure of a molecule and its individual functional groups. (wikipedia.org)
  • This allows identifying the neighboring substituents of the observed functional group, allowing unambiguous identification of the resonances. (wikipedia.org)
  • While infrared spectroscopy provides information about the functional groups that are present in a molecule, NMR yields the number of (and in certain cases the separations between) certain atoms in the sample. (coursehero.com)
  • field
  • Modern NMR spectrometers have a very strong, large and expensive liquid helium -cooled superconducting magnet, because resolution directly depends on magnetic field strength. (wikipedia.org)
  • Magnetic Resonance and Selection Rules As we know from an analysis of the Zeeman effect, in the absence of an external magnetic field the different values of M I are degenerate, and no spectroscopy is possible. (coursehero.com)
  • 4) where we have chosen the z-axis to coincide with the direction of the applied magnetic field. (coursehero.com)
  • structures
  • The sequential walking methodology is not possible for non-double helical nucleic acid structures, nor for the Z-DNA form, making assignment of resonances more difficult. (wikipedia.org)