FT IR Spectroscopy
Which of the following is the basis of first dimension of separation for two-dimensional electrophoresis?

Isoelectric point
Folding
Molecular mass
Solubility

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FT IR Spectroscopy
Why is it advantageous to record many FID signals from the same sample and then add them together?

To remove inaccuracies caused by fluctuations in the applied magnetic field
To ensure that all target nuclei in the sample have been excited
None of these
To increase sensitivity

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FT IR Spectroscopy
In scanning electron microscopy

a specimen is fixed and then coated with thin layer of a heavy metal
a specimen is fixed and then coated with transition metal
a specimen is not fixed and then coated with thin layer of a heavy metal
None of these

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FT IR Spectroscopy
When radiation energy is absorbed by a spin 1/2 nucleus in a magnetic field, what happens?

The processional frequency of the nucleus increases
The angle of precession flips so that the magnetic moment of the nucleus opposes the applied field
None of these
The nucleus spins faster

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FT IR Spectroscopy
What is meant by rotating frame of reference?

None of these
That the sample is spun rapidly in the applied field
That the detector rotates around the sample
If the laboratory itself is imagined to be rotated at the Larmor frequency, viewing that individual magnetic moment vectors are fixed in space

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