\begin{table}%t1
\caption{\label{stand_mod}Standard dense cloud model.}
%\centering
\par
\begin{tabular}{lc}
\hline \hline \noalign{\smallskip}
Parameter & Value \\
\hline
$T$ & 10~K \\
$n_{\rm H}$ & $2\times 10^4$~cm$^{-3}$\\
$A_{V}$ & 10 \\
$\zeta_{\rm H}$ & $1.3\times 10^{-17}$~s$^{-1}$\\
Initial abundances & atomic except for 100\% H$_{2}$ \\
Rate coefficients & osu.03.2008\\
\hline
\end{tabular}
\end{table}