【摘 要】
:
胡萝卜除含有丰富的胡萝卜素和糖外,还含有蛋白质、脂肪、维生素以及钙、磷、铁、镁、钾等多种矿物质,它们都是人体不可缺少的营养成分。 胡萝卜素是人体所需要的维生素A的
论文部分内容阅读
胡萝卜除含有丰富的胡萝卜素和糖外,还含有蛋白质、脂肪、维生素以及钙、磷、铁、镁、钾等多种矿物质,它们都是人体不可缺少的营养成分。 胡萝卜素是人体所需要的维生素A的主要来源之一。维生素A具有维护眼睛和皮肤的健康以及增强肌体组织抵抗力等功能,如果缺了它,容易
In addition to carrot rich in carotene and sugar, but also contains protein, fat, vitamins and calcium, phosphorus, iron, magnesium, potassium and other minerals, they are essential nutrients in the human body. Carotene is one of the main sources of vitamin A needed by the body. Vitamin A has the functions of maintaining the health of eyes and skin and enhancing the resistance of body tissues. If it is missing, it is easy
其他文献
In recent years,the authorsgroup concentrates the researches on the composition design and the properties study of perovskite lead-free piezoelectric ceramics,e
Lead free ferroelectrics have been hot topic for last couple years.Recent reports on lead free can be categorized into two main families: 1.K0.5Na0.5NbO3 (KNN)
Lead-free piezoelectric ceramics 0.84(K0.48Na0.52)NbO3-(0.16/5.15)K2.9Li1.95Nb5.15O15.3 + x mol% K4CuNb8O23 (KNN-KLN16-x,x=0-1) were fabricated by conventional s
For environmental protection reasons,lead-free piezoelectric ceramics have attracted considerable attention recently.In the present work,several kinds of KNN-ba
In order to develop lead-free piezo-/ferroelectric materials to effectively replace the currently used piezoceramics such as Pb(Zr,Ti)O3,we have prepared severa
There are basically two ways in which one can search for new Pb-free piezoelectrics.One is simply to try many different mixtures and measure their response: thi