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. 2020 Oct 21;5(43):27811–27822. doi: 10.1021/acsomega.0c02814

Table 7. RSM-CCD for Transesterification.

          coded
factor name units minimum maximum low high
A CH3OH:Oil   3.00 18.00 –1 ↔ 3.00 +1 ↔ 18.00
B time h 1.0000 6 –1 ↔ 1.00 +1 ↔ 6.00
C temperature °C 40.00 65.00 –1 ↔ 40.00 +1 ↔ 65.00
D catalyst dose % 2.0000 7.00 –1 ↔ 1.00 +1 ↔ 7.00