Table 9:

Notes. Derived column density ratios and comparison with other works and sources. Column 1 gives the considered ratio, Cols. from 2 to 6 show the results obtained in this work in the different spectral cloud components of Orion and the total value, Cols. 7 and 8 ratios obtained by Nomura & Millar (2004) in their models of hot cores (in model B trapping of mantle molecules in water ice is assumed), Col. 9 gives values in Orion by Persson et al. (2007), Col. 10 in dark clouds (TMC-1) (Walsh et al. 2009 and references within), and Col. 11 provides these ratios for the molecular hot core G327.3-0.6, Gibb et al. (2000). ⁽¹⁾ Nomura & Millar (2004); ⁽²⁾ Persson et al. (2007); ⁽³⁾ Assuming ¹⁶O/¹⁷O = 2625.