Methylglyoxal binds to amines in honey matrix and 2′-methoxyacetophenone is released in gaseous form into the headspace on the heating of manuka honey
作者:Yoji Kato、Yui Kishi、Yayako Okano、Masaki Kawai、Michiyo Shimizu、Naoko Suga、Chisato Yakemoto、Mai Kato、Akika Nagata、Noriyuki Miyoshi
DOI:10.1016/j.foodchem.2020.127789
日期:2021.2
manuka honey during heating. Among these, methylglyoxal (MGO) and 2'-methoxyacetophenone (MAP) were significantly decreased by heating at 90 °C. To elucidate the mechanism for this decrease, artificial honey was prepared from sugars and water with MAP or MGO and then heated. The decrease of MGO was enhanced with L-proline, lysine, or arginine derivatives, accompanied by formation of 2-acetyl-1-pyrroline
关于麦卢卡蜂蜜在食品加工中的热稳定性的报道很少。这项研究调查了麦卢卡蜂蜜在加热过程中9种特有化学物质的变化。其中,通过在90°C下加热,甲基乙二醛(MGO)和2'-甲氧基苯乙酮(MAP)显着降低。为了阐明这种减少的机理,用糖或水和MAP或MGO制备了人造蜂蜜,然后加热。L-脯氨酸,赖氨酸或精氨酸衍生物可增强MGO的减少,并分别形成2-乙酰基-1-吡咯啉,MGO衍生的赖氨酸二聚体或argpyrimidine,表明氨基羰基反应是一种途径对于MGO的损失。人造蜂蜜中MAP的减少取决于容器中顶空的体积。在气相中还检测到来自加热的麦卢卡蜂蜜的MAP,这表明MAP被汽化了。因此加热可以减少蜂蜜中的有益分子和/或特征分子。