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Table 1:

Gas-phase abundance of calcium with respect to solar Abundances.
Jet [Ca] $_{\rm gas}$/[Ca] $_{\rm solar}$a
HH 111 0.21-0.52
HH 1 0.25-0.79
HH 83 0.53-1.57*
HH 24 A 0.40-0.69*
HH 24 E 0.62-0.85*
HH 24 C 0.52-0.82*
HH 34b 0.3-1
Orion Cloudc 0.01

a (Ca/H) solar abundance from Asplund et al. (2005): $2.04\times 10^{-6}$; b from Podio et al. (2006); c (Ca/H) abundance estimated in the interstellar medium in Orion by Baldwin et al. (1991): $2 \times 10^{-8}$; * the values of [Ca] $_{\rm gas}$/[Ca] $_{\rm solar}$ for HH 83 and HH 24 have been estimated assuming $A_{\rm V}=0$, thus they are upper limits to the real values.

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