The older groups (days 6–18) had distinct features at 1696/cm (amide I), 1447/cm (CH 2 /CH 3 deformation) and 1092/cm (C‐C skeletal and C‐O‐C stretching) and a clear trend of decreasing intensities for the 729 and 1092/cm peak.
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Quantitative age grading of mosquitoes using surface-enhanced Raman spectroscopy.
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