/span></td>
            <td><span style="font-family: ms sans serif;">1- </span><span style="font-family: ms sans serif;">log10 of Helium number-density<br>
2- </span><span style="font-family: ms sans serif;">log10 of molecular Oxigen number-density<br>
            </span><span style="font-family: ms sans serif;">3- </span><span style="font-family: ms sans serif;">log10 of molecular Nitrogen number-density<br>
            </span><span style="font-family: ms sans serif;">4- </span><span style="font-famil