A reaction of condensation with, or autocondensation of, lignin involving its aromatic ring
appears to have occurred;
Due to their higher boiling point those nitrogen species containing more aromatic rings
(DBE = 12-22) probably preferentially participate in the formation of coke or carbonaceous residue.
The paepalantine has hydroxyls at positions 9 and 10 of the aromatic ring
, making it similar to the catecolic system.
Evidence for aromatic ring
reduction in the biodegradation pathway of carboxylated naphthalene by a sulfate
The different chemical shifts of the amide protons of PMDI in lignin and in cellulose environments may be due to the different shielding effects of the aromatic rings
of lignin compared to the saturated sugar rings.
The portion of the CD spectrum shown in previous studies of wildtype HSA to be attributable to the inner aromatic ring
of thyroxine (17,18)(Fig.
The operation of plasma polymerization under mild plasma polymerization condilions such as lower discharge power is favorable for ihe preparation of plasma thin films with a high reteniion ol" the aromatic ring
structure of the starting monomer.
If the aromatic molecule is changed from pyrene to methyl naphthalene, non-symmetric adsorption of ethyl formate is observed (Figure 3), indicating that the direction of the hydrogen bonding can be controlled by functionalization of the aromatic ring
Other significant peaks are related to the aromatic ring
breathing mode at 1,603, 1,495 and 1,452 [cm.
Mitsui says the key is introduction of an aromatic ring
ester group or amide group into the polyol.
Moreover, a very weak peak, which was based on the protons of aromatic ring
(the protons of benzene ring) or polycyclic aromatic hydrocarbons peak, was observed at 8.
1]H spectrum of shale oil shows that the dominant amount of hydrogen is in aliphatic groups not connected with aromatic ring