(Table 2) Solid state 13C CP/MAS integration results for the thaw-lake sample...

Alkyl/O-alkyl ratio calculated from: alkyl signal intensity/O-alkyl signal intensity (Baldock and Preston, 1995).烷基（alkyl）/氧烷基（O-alkyl）比值可通过烷基信号强度与氧烷基信号强度的比值计算得到（Baldock与Preston，1995）。