母乳如何加热更营养?
  • 采集10名健康、不吸烟、足月妊娠且无并发症女性的母乳样本;
  • 对流加热可降低母乳中超氧化物歧化酶(SOD),过氧化氢酶(CAT)和谷胱甘肽过氧化物酶(GPx)的活性;
  • 微波加热可引起母乳中SOD和GPx活性先暂时升高后下降,对CAT活性的降低小于对流加热;
  • 对流加热时搅拌不影响母乳中SOD和GPx的下降速率;
  • 两种加热方式均会对母乳中抗氧化酶的活性产生影响,可能微波加热更能有效的保留了牛奶中的热敏感蛋白,具有某些优势,可进一步研究。
主编推荐语
小笋干儿
随着社会节奏的加快,将母乳进行储存,而后加热杀菌(常使用巴氏消毒法)再给婴儿食用的需求加大。常规做法是将母乳置于锅中隔水60-70度左右加热数十分钟,而也有人直接将母乳置于微波炉中加热。本研究正是对比了这两种加热方式对母乳中抗氧化物酶活性的影响,发现两种方法都会或多或少影响其活性,但微波加热本身对其活性的影响更加复杂。期待更加全面、更加权威的检测手段来回答储存的母乳应如何加热会更加营养?
关键字
延伸阅读本研究的原文信息和链接出处,以及相关解读和评论文章。欢迎读者朋友们推荐!

The effect of convective heating and microwave heating on antioxidant enzymes in pooled mature human milk

对流加热和微波加热对母乳中抗氧化酶的影响

10.1016/j.idairyj.2018.12.008

2019-01-02, Article

Abstract & Authors:展开

Abstract:收起
The effects of convective and microwave heating at constant temperature (62.5, 66 and 70 °C) on the activity of antioxidant enzymes (superoxide dismutase, SOD; catalase, CAT; glutathione peroxidase, GPx) in pooled mature human milk were compared. Activities of the enzymes were determined using spectrophotometric kits. Activity of GPx decreased significantly in the first stage of heating when milk samples were warmed to pasteurisation temperature. CAT was the most thermolabile enzyme but microwave heating induced a smaller decrease in CAT activity than convective heating. SOD was most resistant to thermal pasteurisation, regardless of the heating method. SOD and GPx activity temporary increased during microwaves heating. Considering shorter pasteurisation period and lower demand for energy, it can be concluded that microwaves pasteurisation enjoys special merits. However, still there is no clear answer as to whether the microwave field itself can affect the antioxidant enzymes of human milk.

First Authors:
Dorota Martysiak-Żurowska

Correspondence Authors:
Dorota Martysiak-Żurowska

All Authors:
Dorota Martysiak-Żurowska,Małgorzata Puta,Bogumiła Kiełbratowska

评论