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8243342 
Journal Article 
A critique of McClare's quantum mechanical muscle model 
Naqvi, KR 
1973 
1 
Nature
ISSN: 0028-0836
EISSN: 1476-4687 
242 
5398 
473 
English 
4700906 
THE explanation of muscle contraction by McClare1,2 is at variance with the current tenets of molecular spectroscopy. Lifetime measurements have shown that, in most cases, the excimer has a shorter half-life than that of the parent monomer3. In pyrene, the example quoted by McClare, the half-life (at room temperature) of the monomer is 31 × 10-8 s, while that of the excimer is only 4.4 × 10-8 s. © 1973 Nature Publishing Group.