brown pigment 褐色素 brown ring reaction 棕环试验 brown ring test 棕环试验 brown sugar 黄糖 ..
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During heating of Jujube pulp, the changes of 5-HMF follows zero order kinetics while the changes of brown pigment follows first order kinetics. Activation energy values of 28.9469 and 31.5092 kJ/mol are obstained for 5-HMF and brown pigment, respectively.3.
2.枣浆在加热过程中,5-HMF的变化符合零级动力学模式,褐色素的生成符合一级动力学模式,两反应的活化能分别是28.9469kJ/mol和31.5092kJ/mol。
参考来源 - 油枣非酶褐变影响因素及其控制技术的研究·2,447,543篇论文数据，部分数据来源于NoteExpress
手术的关键是一种特殊的调谐激光器，它可以破坏虹膜(眼睛中部有颜色的部位)内天然的“褐色素”内的黑色素。
The key to the procedure is a specially tuned laser that destroys the natural brown pigment melanin in the iris, the eye's central colored portion.
相反，蓝眼睛的人有一种褐色色素，被称之为黑色素，位于虹膜背部，但在虹膜前部黑色素浓度较低。
Instead, people with blue eyes have a brown pigment, known as melamin, at the back of their irises but have low concentrations of melanin in the front of their irises.
在褐色头发、黑头发和金发的人群中，黑素皮质素受体基因(melanocortin - 1 receptor)能分泌黑色素。
In people with brown, black and blond hair, the gene, for the melanocortin-1 receptor, produces melanin.
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