\begin{table}%t4
\caption{Diagnostics of conditions in molecular clouds or solar 
nebula from the composition of the residue (cf. Sect.~\ref{infrared}; 
Table~\ref{logIR}).}
\label{predict}
%\centering
\par
\begin{tabular}{cc}   \hline \hline  
Molecular probes in the IR & Diagnostic of ... \\  \hline  
COO$^-$ vs. HMT & CO/CO$_2$/CH$_3$OH ratio, H$_2$O ice dilution, UV dose, {\it hard}/{\it soft} UV, ice irradiation temp.\\
Amides vs. HMT & UV dose\\
Amides vs. COO$^-$ & UV dose\\
Esters vs. HMT & UV dose\\
Esters vs. COO$^-$ & UV dose\\
Amides vs. total & CO/CH$_3$OH ratio\\
HMT vs. total & UV dose, CO/CO$_2$/CH$_3$OH ratio, H$_2$O ice dilution\\
POM-like species & Low H$_2$O concentration\\
Organics vs. ice & UV dose, H$_2$O ice dilution\\ 
\hline
\end{tabular}
\end{table}