3000 cm u2212 1 see fig1 a to e in all cases displayed in fig1 a to 15 e peak 56 is assigned due to c u2014 h symmetric stretching in methylene groups ch 2 of lipids the band structure located at about 2922 cm u2212 1 is identified as the asymmetric stretching of methylene groups ch 2 in lipids furthermore peak 58 at approximately 2956 cm u2212 1 arises from asymmetric stretching vibration of methyl group ch 3 when comparing the spectra in fig1 a b c and e the spectrum associated with the left wrist acupuncture point lu9 9p differs in the weak intensity of the band 58 see fig1 c this change depends on the vibration of the methyl group a special situation arises for the spectrum from fig1 d ac point 8p or lu8 here peak 58 is dominating the spectrum in addition two new band features near 2874 cm u2212 1 59 and 2893 cm u2212 1 60 are observed originating from symmetric stretching vibration of methyl group ch 3 and c u2014 h stretch it can be seen that the pronounced peak 58 occurring at 2972 cm u2212 1 is shifted substantially towards higher wavenumbers u03b4v u02dc.