Table 2 Relationship between C functional group contents (y) and C contents in physical subfractions (x) in macroaggregates and microaggregates.^a

Alkyl C

y = 10.206e^0.305x

0.743

–

–

Methxoyl/N-alkyl C

y = 1.961lnx−4.393

0.865*

–

–

O-alkyl C

y = 10.096e^0.137x

0.599

–

–

di-O-alkyl C

y = 10.091e^0.388x

0.612

–

–

Aromatic C

y = 8.199e^0.289x

0.585

–

–

Phenolic C

y = 1.752lnx−4.044

0.872*

–

–

Carboxyl C

y = 2.837lnx−6.449

0.687

–

–

Alkyl C

y = 1.562e^0.766x

0.399

y = 2.151x+2.749

0.197

Methxoyl/N-alkyl C

y = 0.514lnx+0.206

0.696

y = 2.686lnx+6.183

0.396

O-alkyl C

y = 0.797e^0.555x

0.837*

y=3.684lnx+2.891

0.600

di-O-alkyl C

y = 0.836e^1.526x

0.807*

y = 3.585lnx+6.877

0.632

Aromatic C

y = 0.304e^1.226x

0.898*

y = 2.625x+1.526

0.364

Phenolic C

y = 0.419lnx+0.125

0.585

y = 2.939lnx+7.314

0.520

Carboxyl C

y = 0.194lnx+0.406

0.534

y = 0.258e^0.242x

0.670

Alkyl C

y = 1.101e^1.318x

0.848*

y = 3.463x+4.559

0.513

Methxoyl/N-alkyl C

y = 0.46lnx+0.105

0.780*

y = 6.231x+3.911

0.838*

O-alkyl C

y = 1.08e^0.584x

0.663

y = 2.350x+3.660

0.688

di-O-alkyl C

y = 1.24e^1.522x

0.575

y = 7.161x+3.585

0.785

Aromatic C

y = 0.471e^1.205x

0.621

y = 4.415e^0.445x

0.650

Phenolic C

y = 0.398lnx+0.002

0.735

y = 8.429x+4.012

0.847*

Carboxyl C

y = 0.776lnx-0.145

0.842*

y = 0.187x-0.564

0.609