牧草饲养的海弗里克牛和布拉福牛未老化和老化肉中硒、铜、锌、锰和铁的生物可给性及血红素铁含量
Bioaccessibility of Se, Cu, Zn, Mn and Fe, and heme iron content in unaged and aged meat of Hereford and Braford steers fed pasture.
机构信息
Universidad de la República, Montevideo, Uruguay.
出版信息
Meat Sci. 2012 Jun;91(2):116-24. doi: 10.1016/j.meatsci.2012.01.001. Epub 2012 Jan 14.
The content and the bioaccessibility of Se, Cu, Zn, Mn, and Fe were determined in unaged and aged meat (14days) from the Psoas major (PM), Gluteus medius (GM) and Longissimus dorsi (LD) muscles of Hereford (H) and Braford breed (B) steers fed pasture. Furthermore, the content of heme-Fe was determined in the same muscles. The H had a lower content of Cu and a higher content of Fe. Also, H had more heme-Fe than B. The bioaccessibility in unaged meat for Se, Cu, Zn, Mn and Fe ranged between 75 and 91%, 30 and 45%, 40 and 68%, 55 and 95%, and 60 and 70%, respectively. After aging, the bioaccessibility for the same minerals ranged between 58 and 80%, 30 and 48%, 40 and 58%, 75 and 95%, and 59 and 70%, respectively. Aging affected negatively the Se content and its bioaccessibility, in the two breeds. Also, the heme-Fe content was negatively affected by aging in all muscles and breeds.
本研究旨在测定未老化和老化（14 天）的 Hereford（H）和 Braford（B）品种阉牛背最长肌、臀中肌和腰大肌中硒、铜、锌、锰和铁的含量及其生物可利用率，同时测定同一肌肉中血红素铁的含量。与 B 品种相比，H 品种的铜含量较低，铁含量较高，血红素铁含量也较高。未老化肉中硒、铜、锌、锰和铁的生物可利用率分别在 75%至 91%、30%至 45%、40%至 68%、55%至 95%和 60%至 70%之间。老化后，同一矿物质的生物可利用率分别在 58%至 80%、30%至 48%、40%至 58%、75%至 95%和 59%至 70%之间。老化会降低两种品种肉中硒的含量及其生物可利用率。此外，所有肌肉和品种的血红素铁含量都会因老化而受到负面影响。
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