Using finite difference method, we carry out the numerical calculation of the electric field induced by a low frequency magnetic field in a two dimensional stratified biological medium.
采用有限差分法对低频磁场在二维分层生物媒质中诱发的电场进行了数值计算。
That little ball packed with biological material is the medium through which all of our billions of cells coordinate with each other to keep our conscious stable and our bodies responsive.
这个包裹着生物材料的小球的是我们身体里数十亿的细胞能够相互配合协作的媒介，通过它，我们的才能保持意识清醒，行动敏捷。
Objective: To find out a method of extraction and purification of bone morphogenetic protein (BMP) from osteosarcoma cell conditioned medium, and evaluate the biological activity of BMP.
目的探索从骨肉瘤细胞条件培养基中提取骨形态蛋白（BMP）的方法，并测定其生物学活性。
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