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Chemistry
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porphyrin

I'm a semi-retired physical chemist.

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Top posts (559) All Questions Answers | Votes Newest

21 Understanding group theory easily and quickly Sep 7 '16
16 Is it possible for a substance to absorb a longer wavelength of EM wave and emit a shorter wavelength? Jul 7 '17
15 Why does bond angle decrease in the order H2O, H2S, H2Se? Aug 25 '16
13 Is there any empirical upper limit for order of reaction? Jul 19 '17
12 What is resonance, and are resonance structures real? Jul 31 '16
12 Why do spin isomers of hydrogen (ortho and para hydrogen) change their nuclear spin with temperature variance? Jan 29 '17
12 Can magnetic fields affect a chemical reaction? Jul 23 '16
11 Uv vis and fluorescence spectroscopy: sensitivity Nov 21 '17
11 Does deuterated water slow down the overall metabolism of a cell? Jul 23 '17
11 Why is the magnesium(II) ion preferred over other ions in chlorophyll? Feb 3 '17
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