作者:Alexandra Urbisch、Ulrike Einhorn-Stoll、Hanna Kastner、Stephan Drusch、Lothar W. Kroh
DOI:10.1021/acs.jafc.8b04158
日期:2018.10.31
Investigations regarding the formation of these substances show that α-ketoglutaraldehyde plays an important role as an intermediate product. In addition, MS analysis of model systems of norfuraneol in combination with 2,3-DHBA showed the formation of oligomers that could also be detected in d-GalA model systems, leading to the assumption that, in addition to reductic acid, these compounds are jointly
含水d -galacturonic酸(d在130℃下在不同pH值处理-GalA)模型系统显示出强烈的颜色形成,而其它还原糖,如d半乳糖(d -Gal),几乎不发生反应。GC-MS测量表明存在多种酚类化合物:例如3,8-二羟基-2-甲基-4 H-铬-4-(酮)和2,3-二羟基苯甲醛(2,3-DHBA)。这些酚类化合物,特别是2,3-DHBA,具有很强的褐变潜力,在还原糖的加热模型溶液中找不到。关于这些物质形成的研究表明,α-酮戊二醛作为中间产物起着重要作用。此外,对正呋喃酚与2,3-DHBA结合使用的模型系统的质谱分析表明,低聚物的形成也可以在d -GalA模型系统中检测到,这导致人们认为除还原酸外,这些化合物也是共同负责d- GalA热处理过程中强烈的颜色形成。