BCH 3125 Study Guide - Midterm Guide: Turnover Number, United Nations Convention Against Torture, Chymotrypsin

• School: University of Ottawa
• Department: Biochemistry
• Course: BCH 3125
• Professor: John Baenziger

Document Summary

Used to characterize the chemical structures of newly synthesized molecules. Nuclei possess what is called a magnetic moment (u); they behave like tiny bar magnets when placed in a magnetic field. Magnetic moments are like tiny dipole moments with a positive and negative pole they interact with each other. Atoms all possess a magnetic moment, u. A magnetic field (bo) causes u to precess about the bo (z-axis) at the larmor frequency, vo, which is proportional to the strength of bo and the gyromagnetic ratio, y, a property of the nucleus. The bigger the y and the larger the bo, the fast the precession frequency. Nuclear spins either align parallel or anti-parallel to bo. There is a slight energy different between spins in the two orientations, called deltae. The parallel orientation is slightly preferred because it has a slightly lower energy than antiparallel.