Phân tích tư tưởng của nhân dân qua đoạn thơ: Những người vợ nhớ chồng… Những cuộc đời đã hóa sông núi ta trong Đất nước của Nguyễn Khoa Điềm
3440
1
0
9 trang
Purified manganese peroxidase (MnP) fromPhanerocha-ete chrysosporiumoxidizes nonphenolicb-1 diarylpropanelignin model compounds in the presence of Tween 80,andin three- to fourfold lower yield in its absence. In thepresenceof Tween 80,1-(3¢,4¢-diethoxyphenyl)-1-hydroxy-2-(4¢-methoxyphenyl)propane (I) was oxidized to 3,4-diethoxy-benzaldehyde (II),4-methoxyacetophenone (III) and1-(3¢,4¢-diethoxyphenyl)-1-oxo-2-(4¢-methoxyphenyl)pro-pane (IV),while only 3,4-diethoxybenzaldehyde (II) and4-methoxyacetophenone (III) were detected when the reac-tion was conducted in the absence of Tween 80....
Nội dung trích xuất từ tài liệu:
Báo cáo khoa học: Cleavage of nonphenolic b-1 diarylpropane lignin model dimers by manganese peroxidase from Phanerochaete chrysosporium Evidence for a hydrogen abstraction mechanism
