Analytical (Chemistry)
MALDI-TOF Spectrometer 
Another great animation that explains the basic workings of a Matrix Assisted Laser Desorption/Ionization-Time of Flight (MALDI-TOF) spectrometer.These are high resolution spectrometers that are useful in determining the mass of atoms all the way to proteins.
HPLC videos and instructions by Sigma-Aldrich
A little product-centric but a good introduction to HPLC techniques and equipment HPLC Column FundamentalsIntroduction to how solutes can interact with columns containing porous particles and stationary phases to result in separation. I'm listing the most helpful ones below Nick the Hero:...
All you ever wanted to know about Pascal's triangle
I realize this might be better suited for the Math section but since pascal's triangle has a micro-implementation in NMR spectroscopy I thought it might be somewhat interesting. There is a lot of information on this site about pascal's triangle.
Continuous Wave NMR spectroscopy
In these two paragraphs CW-NMR is explained. Even though the instrument is generally not used any more it gives you an idea of where modern day FT-NMR's come from.
The Basics of NMR
This is a real good intro to 1H NMR by a professor from Rochester Institute of Technology. It might be a little long for a review but definitely in enough information to get you started in the wonders of NMR.
Bragg's Law and Diffraction
This is a nicely done short description on Bragg's law and its use in determining atomic structure of crystals. There is a well done applet and some good examples of experimental diffraction patterns to help with the understanding of Bragg's law.
X-ray Crystallography
This short review is more geared towards protein crystal growers. There is a very basic intro to crystallography and then some info on how to grow crystals. It is well written and easy to understand.
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