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Effect of extraction on reaction of bark extracts with formaldehyde

, : Effect of extraction on reaction of bark extracts with formaldehyde. Holzforschung 45(1): 7-11

Southern pine (Pinus taeda), sweetgum (Liquidambar styraciflua), white oak (Quercus alba), red oak (Q. falcata) and yellow poplar (Liriodendron tulipifera) barks were extracted with sodium hydroxide, sodium sulfite, and sodium carbonate at various concentrations and temperatures. These extracts were reacted with 30% formalin at 60 degrees C for 3 h. Free formaldehyde and methanol in the reaction mixture were quantitatively determined throughout the reaction time.

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