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- W1991755551 abstract "ABSTRACT This paper reports the structural investigation of a series of in situ spruce lignins in wood, thermomechanical pulp (TMP) and the corresponding bleached (BTMP) and photoyellowed (YBTMP) samples. This was achieved by using an original two-step degradative technique, thioacidolysis followed by Raney nickel desulfuration. The determination of thioacidolysis monomeric and dimeric products allowed an estimate of various lignin building units and interunit bonds, respectively. It was observed that the thermomechanical and bleaching treatments did not affect spruce lignin structure to an appreciable extent. On the contrary, the photoyellowing treatment caused marked structural changes in lignin, particularly when run in severe conditions. These changes were essentially a decrease in the amount of β-O-4 and β-1 interunit bonds and a relative increase in catechol units and in vanillin end-groups." @default.
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- W1991755551 date "1992-01-01" @default.
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- W1991755551 title "Structure and Reactivity of Spruce Mechanical Pulp Lignins Part I. Bleaching and Photoyellowing ofin situLignins" @default.
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- W1991755551 doi "https://doi.org/10.1080/02773819208545075" @default.
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