【摘 要】
:
常常听到有人抱怨,天天补钙,可效果就是不明显。其实,问题并非这么简单。补钙的关键在于吸收。因为钙的吸收率常会受到许多因素的影响,了解这些因素才能使补钙更为有效。1.
论文部分内容阅读
常常听到有人抱怨,天天补钙,可效果就是不明显。其实,问题并非这么简单。补钙的关键在于吸收。因为钙的吸收率常会受到许多因素的影响,了解这些因素才能使补钙更为有效。1.受激素的调节。婴幼儿发育最快,吸收钙的能力最强,达50%以上;4岁以上儿童和青少
Often hear someone complain, every day calcium, the effect is not obvious. Actually, the problem is not that simple. The key is to absorb calcium. Because calcium absorption is often influenced by many factors, understanding these factors can make calcium more effective. Regulated by hormones The fastest development of infants and young children, the ability to absorb calcium the strongest, up to 50%; children over 4 years of age and adolescents
其他文献
二萘嵌苯是多环芳烃的一种,广泛地分布于环境之中。有机物在腐烂和燃烧过程中均可形成二萘嵌苯。根据小鼠皮肤涂抹试验结果,过去一致认为二萘嵌苯为非致癌物。然而最近发现
Site-selective borylation of simple arenes was realized in one pot via an electrophilic thianthrena-tion/Pd-catalyzed borylation sequence.The key to achieve thi
A highly efficient catalytic system for the N-arylation reactions of(hetero)aryl chlorides and nitrogen heterocycles with a copper(Ⅰ)complex containing a 1,10-
做好计划生育工作,提高人口素质,这是我们的一项基本国策。最近,记者就生育问题采访了北京协和医院剐院长郎景和教授。生育要纳入家庭计划郎景和教授说:“计划生育也有个家
A general method for visible light-induced copper-catalyzed arylation of sp2 C-H bonds of azoles has been developed.The method employs aryl halide as the coupli
We have achieved the total synthesis of an architecturally and biologically intriguing cyclic polypeptide,rhizonin A(1),in an exceptionally concise and converge