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研究应用响应面方法,研究肝脏以及其他成分在鸡肉与米饭和小牛肉与胡萝卜婴幼儿食物中铜、锌、铁的可透析性。尽管现代营养纲领推荐增加膳食纤维的摄入,但这可能给婴幼儿带来显著问题。膳食纤维成分增加,尤其是胡萝卜,也同时增加了鞣酸和植酸含量,减少了铜和锌的可透析性;因此,在婴幼儿食品配方中胡萝卜含量被降到了最低。大米对铜的可透析性显示强烈的负向作用,在以往的配方里,豌豆和马铃薯都没有提示对微量元素可透析性有任何显著的抑制作用。婴幼儿食品配方中包含肝脏在内会显著降低鸡肉与米饭中铁的可透析性(反向二次效应)和小牛肉与胡萝卜铜的可透析性(反向线性效应);这2者都与肝脏中植酸和没食子酸的存在有关。铜可透析性的减少归因于小牛肉与胡萝卜中一些原料鞣酸的含量,而鸡肉与米饭中铁可透析性降低归因于植酸或其代谢产物的存在。
Response surface methodology was used to study the dialysis of copper, zinc and iron in liver and other ingredients in chicken and rice and veal and carrot infants. Although modern nutritional guidelines recommend increasing dietary fiber intake, this can cause significant problems for infants and toddlers. Increased dietary fiber content, especially carrots, also increases both tannic acid and phytic acid content, reducing the dialysis of copper and zinc; therefore, the carrot content is minimized in infant formula. Rice shows a strong negative effect on the dialyzability of copper, and neither pea nor potato showed any significant inhibitory effect on the dialysis of trace elements in previous formulations. Inclusion of the liver in infants and young children’s food formulations significantly reduced iron dialysis (reverse quadratic effect) in chicken and rice and dialysis (reverse linearity) of veal and carrot copper; both of these were associated with liver Phytic acid and the presence of gallic acid. The reduction of copper dialysis is attributed to the tannin content of some of the raw materials in veal and carrot whereas the reduction of iron dialysis in chicken and rice is attributed to the presence of phytic acid or its metabolites.