1 – 8

There is only one step left to understand the shape of spectra, measured with a frozen enzyme
solution. It has to do with one of the selection rules in EPR, namely that only the magnetic moments
from the sample in the direction of the external field (to be more precise: perpendicular to the
direction of the magnetic field created by the microwaves) are detected…
This part kicked me out. As the sentence is long and I do not understand it with the part afterwards