Lignin los ntawm veld nyom tshwm sim muaj nitrogen-ib feem hauv daim ntawv ntawm -XCH, pawg - uas tsis yog tag nrho tshem tawm los ntawm kev rov ua kom huv nrog dioxan. txoj kev Zeisel.
lignin ua los ntawm dab tsi?
Lignin yog tsim los ntawm coniferyl cawv, p-coumaryl cawv, thiab sinapyl cawv. Lignins sau qhov chaw nruab nrab ntawm cov cell membranes ntawm cov nroj tsuag ligneous thiab hloov mus rau hauv ntoo, yog li ua rau lub cev sib xyaw ntawm lub siab-resistant lignin thiab cellulose muaj zog tensile zoo.
Lignin yog dab tsi?
Lignin yog thermally ruaj khov tab sis nquag UV degradation. Lignin yog ib tug complex hydrocarbon polymer nrog ob qho tib si aliphatic thiab aromatic constituents, amorphous, thiab hydrophobic nyob rau hauv cov xwm. Lignin yog tag nrho insoluble nyob rau hauv feem ntau cov kuab tshuaj thiab tsis tuaj yeem tawg mus rau hauv monomeric units.
Qhov txawv ntawm lignin thiab cellulose yog dab tsi?
Lignin yog qhov thib ob uas muaj ntau tshaj plaws hauv ntiaj teb, dhau los ntawm cellulose xwb; nws yog tam sim no tsuas yog nyob rau hauv woody nroj tsuag. Qhov sib txawv tseem ceeb ntawm lignin thiab cellulose yog tias cellulose yog polymer ntawm carbohydrate thaum lignin yog non-carbohydrate aromatic polymer.
Lignin puas zoo rau av?
Lignin feem ntau suav tias yog qhov ntsuas tseem ceeb ntawm cov av organic carbon (SOC) cia thiab dynamics. Txhawm rau ntsuas qhov cuam tshuam ntawm cov nroj tsuag hauv zej zog thiab cov av tob ntawm cov avlignin yog qhov tseem ceeb kom nkag siab zoo dua hav zoov carbon cycling.
