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. 2018 Aug 7;8:11804. doi: 10.1038/s41598-018-30096-3

Table 1.

Rate of change (k) and half life time (t1/2) of the ratio between the 1660/1600 (cm−1) Raman bands during time series for Coniferyl alcohol at 10, 20 and 30 mW, DHP at 30 mW and cell corner of Spruce microsection at 30 mW.

LPO (mW) Coniferyl Alcohol DHP Cell corner Spruce
10 20 30 30 30
τ (s) 16.88 17.14 1.67 2.75 1.39
1.04
k (s−1) 0.06 0.06 0.60 0.36 0.72
0.96
t1/2 (s) 11.70 11.88 1.16 1.91 0.96
0.72

Different laser powers were applied only to coniferyl alcohol, in order to determine the kinetics of the process. Due to the presence of noise when reducing the laser power, for DHP and cell corner, only the upper extreme (30 mW) was studied. During the time series measurement, the irradiation was continuous and one spectrum was taken every 0.04 s.