Chemical Compounds

1. Benzophenones 66%
2. Protons 59%
3. Arc lamps 58%
4. Xenon 50%
5. Magic angle spinning 49%
6. Proton transfer 49%
7. Electrons 47%
8. Exchange interactions 45%
9. Relaxation time 38%
10. Anions 36%
11. Magnetic fields 33%
12. Nuclear magnetic resonance 30%
13. Irradiation 29%
14. Derivatives 27%
15. Amino Acids 26%
16. Thiophenes 26%
17. Quenching 23%
18. Liquids 22%
19. Dissolved oxygen 21%
20. Chelation 21%
21. Methanol 18%
22. Impurities 14%
23. Histidine 13%
24. Density functional theory 12%
25. Tyrosine 12%
26. Spectroscopy 9%
27. Polarization 9%
28. 1,4-dioxane 5%
29. cyclohexanone 5%

Physics & Astronomy

Physics

1. protons 48%
2. nuclear magnetic resonance 25%
3. atomic energy levels 25%
4. anions 16%
5. electrons 10%
6. polarization 7%

Engineering

1. spectral signatures 48%
2. arc lamps 27%
3. xenon lamps 26%
4. life (durability) 25%
5. metal spinning 19%
6. nuclear spin 13%
7. electron spin 13%
8. irradiation 12%

Chemistry and Materials

1. amino acids 36%
2. liquids 21%
3. thiophenes 13%
4. naphthalene 13%
5. carboxylates 12%
6. methyl alcohol 10%
7. histidine 9%
8. tyrosine 9%
9. oxygen 7%

General

1. electron transfer 33%
2. solid state 27%
3. relaxation time 20%
4. electronics 20%
5. electronic levels 16%
6. interactions 14%
7. quenching 12%
8. convection 10%
9. impurities 8%
10. preparation 8%
11. nuclei 8%
12. augmentation 7%
13. density functional theory 5%

Aerospace Sciences

1. magnetic fields 20%
2. spectroscopy 6%

Medicine & Life Sciences

1. 3-methyladenine-DNA glycosylase 100%
2. Xenon 50%
3. Base Pairing 39%
4. Hypoxanthine 29%
5. DNA 23%
6. Nucleotides 19%
7. Hot Temperature 12%
8. 2-Aminopurine 12%
9. Tryptophan 7%
10. Freezing 7%
11. Hydrolysis 6%
12. Magnetic Resonance Spectroscopy 6%
13. Fluorescence 6%
14. cyclohexanone 5%
15. 1,4-dioxane 5%