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Substrates may accumulate intracellularly against a concentration gradient. 底物可以逆浓度梯度而积聚于细胞内。
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。
The movement of a solute down its concentration gradient is called diffusion. 溶质沿着浓度梯度溶解的运动过程被称作分子扩散运动。
Su trates may accumulate intracellularly agai t a concentration gradient. 底物可以逆浓度梯度而积聚于细胞内。
The formation pressure gradient curve in the same depth of logging is computed by equivalent depth method. 通过等效深度法计算出与测井曲线采样深度对应的地层压力梯度曲线。
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。
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。
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。
To transport(ions or molecules)against a concentration gradient by the expenditure of chemically stored energy. 输送通过消耗以化学形式储存的能量把（离子或分子）输送到一个集中倾斜度
To transport(ions or molecules) against a concentration gradient by the expenditure of chemically stored energy. 输送通过消耗以化学形式储存的能量把（离子或分子）输送到一个集中倾斜度
When the weak acid is given orally, the concentration gradient for un-ionized drug between stomach and plasma tends to be large, favoring diffusion through the gastric mucosa. 当这种弱酸性药物经口服给药时，胃与血浆之间的非解离型药物浓度梯度很大，从而有利于透过胃粘膜扩散。
Decreased blood flow( eg, in shock) may lower the concentration gradient across the intestinal mucosa and decrease absorption by passive diffusion. 血流量的减少（休克病人）以降低跨肠粘膜的浓度梯度，从而减少被动扩散吸收。
The results show surface enrich ment of PVC component and existence of concentration gradient over the top 5nm Jo the blend samples. 结果表明,在共混物样品表层5nm的深度范围里富集了PVC组分,并存在着深度浓度梯度。
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。
Salts could be enriched around electriferous groups of polymer molecules in solution，which formed a salt concentration gradient. 溶液中的盐份为非均匀分布，在聚合物分子上带电基团附近富集后形成浓度梯度。
Across a plane normal to the direction of the concentration gradient (or any other plane), there are fluxes of molecules in both directions. 在一个倾向于浓度梯度方向的平面（或是其它任意平面）上，分子同时在两个方向中波动。
The emulation of the concentration gradient in carburied layer is a successful application of computer technique based on the diffusion theory. 化学热处理的渗层浓度梯度仿真是计算机在扩散问题上的成功应用。
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。
The characteristic movement or orientation of an organism or cell along a chemical concentration gradient either toward or away from the chemical stimulus. 趋化性组织或细胞在化学集中上朝向或远离化学刺激的特殊运动或定位作用。
In this experiment, the norbixin was extracted and prepared by means of aqueous alkali and acid precipitation, adverse concentration gradient and membrane filtration technology. 本实验通过碱溶酸沉、逆浓度梯度和膜分离技术的提取方法来制备降胭脂树橙,其工艺条件为:料:液=1:9(w/w);