FT IR Spectroscopy What is meant by rotating frame of reference? That the sample is spun rapidly in the applied field None of these If the laboratory itself is imagined to be rotated at the Larmor frequency, viewing that individual magnetic moment vectors are fixed in space That the detector rotates around the sample That the sample is spun rapidly in the applied field None of these If the laboratory itself is imagined to be rotated at the Larmor frequency, viewing that individual magnetic moment vectors are fixed in space That the detector rotates around the sample ANSWER DOWNLOAD EXAMIANS APP
FT IR Spectroscopy When radiation energy is absorbed by a spin 1/2 nucleus in a magnetic field, what happens? The angle of precession flips so that the magnetic moment of the nucleus opposes the applied field The nucleus spins faster None of these The processional frequency of the nucleus increases The angle of precession flips so that the magnetic moment of the nucleus opposes the applied field The nucleus spins faster None of these The processional frequency of the nucleus increases ANSWER DOWNLOAD EXAMIANS APP
FT IR Spectroscopy Which of the following is the basis of first dimension of separation for two-dimensional electrophoresis? Isoelectric point Folding Solubility Molecular mass Isoelectric point Folding Solubility Molecular mass ANSWER DOWNLOAD EXAMIANS APP
FT IR Spectroscopy Why is it advantageous to record many FID signals from the same sample and then add them together? To ensure that all target nuclei in the sample have been excited None of these To remove inaccuracies caused by fluctuations in the applied magnetic field To increase sensitivity To ensure that all target nuclei in the sample have been excited None of these To remove inaccuracies caused by fluctuations in the applied magnetic field To increase sensitivity ANSWER DOWNLOAD EXAMIANS APP
FT IR Spectroscopy In FT-NMR, how are nuclei excited? By radio-frequency radiation whose frequency is swept across a predetermined range By an intense pressure By an intense pulse of radiation which contains a wide range of frequencies None of these By radio-frequency radiation whose frequency is swept across a predetermined range By an intense pressure By an intense pulse of radiation which contains a wide range of frequencies None of these ANSWER DOWNLOAD EXAMIANS APP
FT IR Spectroscopy In immunofluroscence microscopy, fluroscent compounds are attached to an antigen specific for the subcellular structure an antibody specific for the subcellular structure none of these bound antibody specific for the subcellular structure an antigen specific for the subcellular structure an antibody specific for the subcellular structure none of these bound antibody specific for the subcellular structure ANSWER DOWNLOAD EXAMIANS APP
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