预处理条件对刺槐诱发变色的影响

该文对刺槐在3种不同预处理条件下的诱发变色结果进行了对比，并对变色前后试样的视觉物理参数、红外光谱和气相 质谱做了分析，结果表明:①刺槐的颜色可获得均匀的深褐色；②压力汽蒸条件下，刺槐的颜色更加均匀；③羟基（—OH）等助色基团在预处理条件下氧化成羰基（—CO）、酯基(—COO—)等发色基团，使刺槐的颜色加深。 

Effects of pretreatment conditions on the induced discoloration of silver chain.

Induced discoloring of silver chain in three different conditions was studied in this paper. The visional physical parameters of the timber, infrared spectrum and GC MS were conducted for each sample before and after pretreatment. Results showed that: 1) color of the timber tended to be uniform puce; 2) under the condition of steam with pressure, the color of timber was much more uniform; 3) hydroxyl (—OH) groups were oxidized to carbonyl (—CO), ester (—COO—), ester or acetone groups during inducing discoloration under the pretreatment conditions, resulting in the darker wood color.