酶法与酸法提取的乌鸡黑色素的性能比较

比较了酶法和酸法提取的乌鸡黑色素的部分性能。结果表明:(1)采用酶法提取的乌鸡黑色素颗粒表面光滑,而酸法表面较粗糙;颗粒尺寸上,酸法提取的略大于酶法。(2)在抗紫外线方面,酶法优于酸法。(3)黑色素浓度小于0.3mg/mL时,酶法清除自由基的效果优于酸法,但在0.3mg/mL以上时,则2者相当。酶法与酸法黑色素均有抑制黄油氧化功能,时间越长,抑制作用越明显,酶法黑色素的抗氧化性略高于酸法,但差异不显著。(4)酶法提取的乌鸡黑色素热稳定性优于酸法,但光稳定性方面,酶法不及酸法。

Quality Comparison of Silky Fowl Melanin which Extracted in Proteinase Hydrolysis and Muriatic Acid Hydrolysis

Part qualities of silky fowl melanin extracted by the method of proteinase hydrolysis were compared with that of the melanin which extracted by the method of muriatic acid hydrolysis.The results were as follows:(1)In comparison with the melanin particles which extracted by the proteinase hydrolysis,melanin particles which extracted by muriatic acid hydrolysis were rougher and bigger.(2)UV-resistant effect of the melanin extracting with the proteinase hydrolyzation exceeded that of the melanin extracting by the acid.(3)There was the same tendency on scavenging radical's effect as the UV-resistant effect;but when content of the melanin was above 0.3mg/mL,scavenging radical's effect of both were equal.Both the melanin extracting by the proteinase and the melanin extracting with the acid could protected butter from oxidation,and the oxidation was more obvious as time prolonged.Antioxidation of melanin extracting using the proteinase was slightly higher than that of the melanin extracting using the acid,but the difference was not striking.(4)Heat stability of the melanin extracting using the proteinase was better than that of the melanin extracting using the acid,while light stability was opposite.