| 1. | The reaction rate is limited by the concentration gradient of oxygen in the sample .
反应速率受试样中氧浓度梯度的限制。 |
| 2. | They must be able selectively to allow certain molecules or ions to enter across this barrier, often against concentration gradients .
这必须能选择性地让某些分子或离子（常常是逆着浓度梯度）通过这个屏障。 |
| 3. | We may assume that there is no correlation between the local velocity of a liquid particle at a mathematical point inside the void space and the concentration gradient .
我们可以假定，在空隙空间的一个数学点上液体质点的局部速度和浓度梯度之间无相关性。 |
| 4. | A simple method of preparing concentration gradient gel
浓度梯度胶制作方法改良研究 |
| 5. | Substrates may accumulate intracellularly against a concentration gradient
底物可以逆浓度梯度而积聚于细胞内。 |
| 6. | Only diffusion under a concentration gradient is considered in this chapter
本章仅讨论由浓度梯度引起的质量扩散。 |
| 7. | Aerotaxis ( aerotactic movement ) a taxis in response to an oxygen concentration gradient
趋氧性:一种对氧浓度梯度产生回应的排序。 |
| 8. | Chemotaxis ( 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。 |
| 9. | Passive diffusion : in this process , transport across a cell membrane depends on the concentration gradient of the solute
被动扩散在被动扩散过程中，跨细胞转运依赖于溶质浓度梯度。 |
| 10. | At solder joints , different materials are brought into contact , and there are compositional gradients at the interfaces
不同的材料在焊点相互接触，因此在界面处会存在著组成之浓度梯度。 |
