This sets up a chemical concentration gradient that tells stem cells how and where to develop.
形成化学浓度梯度，告诉干细胞如何以及向哪儿发育。
(chemotactic movement) a TXIS in response to a chemical concentration gradient.
趋化现象：一种对化学浓度梯度的趋化反应。
For reactive sputtering, the gradient films with varying ratio of chemical component can be prepared by changing gas flow rate continuously.
对于反应溅射，可通过连续改变反应气体流量制得化学成分比连续变化的梯度薄膜。
The variation of frequency curve's mode peak content with the increasing of depth, shows not only the trend of chemical weathering but also variation gradient of weathering extent.
频率曲线众数峰含量随深度的变化，不但指示了化学风化趋势，而且反映了风化程度的变化梯度。
The equation shows that the potential depends on the chemical potential gradient of the active ions in the occluded pitting and partial potential drop corresponding to the same ions.
此式表明，蚀坑内的电压取决于蚀坑内各类活性腐蚀因子的化学势梯度和相应粒子的电压降。
When the direction of the magnetic field strength gradient and the direction of the chemical potential gradient is identical, the effect of the mass transfer is best.
并指出当外加磁场感应强度梯度的方向和化学势梯度的方向一致时，传质效果最好。
ABSTRACT: OBJECTIVE To evaluate the quality, physical and chemical properties and release of ferulic acid liposome via calcium acetate gradient.
摘要：目的用醋酸钙梯度法制备阿魏酸脂质体，并考察其制备工艺及理化性质，进行体外释放度评价。
The present invention relates to chemical and environment protection technology, and is especially gradient magnetic field process and apparatus for raising content of oxygen dissolved in water.
本发明公开了属于化工环保技术领域的一种通过梯度磁场提高水中溶解氧含量的方法及装置。
The present invention relates to chemical and environment protection technology, and is especially gradient magnetic field process and apparatus for raising content of oxygen dissolved in water.
本发明公开了属于化工环保技术领域的一种通过梯度磁场提高水中溶解氧含量的方法及装置。
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