Similarly , xenopus spinal growth cones turned away from a gradient of baclofen , an agonist of the gabab receptor 同样的， gabab受体的激动剂baclofen的浓度梯度也能够吸引或排斥爪蟾脊髓神经元的生长锥。
Ecocline a cline that is due to a specific environmental factor , such as a gradient of heavy metal concentration in the soil 生态渐变群：由物种生存特定环境因素影响而形成的一种渐变群，例如土壤中的重金属浓度梯度。
These problem sets are designed to help students understand the importance of ionic concentration gradients and conduction velocities in axons 作业的设计目的是为了帮助学生理解离子浓度梯度与传导速度在轴突中的重要性。
It have been proved that the tip [ ca2 + ] i and the amount of tip f - actin oscillates periodically accompany the oscillatory growth of pollen tubes 伴随花粉管的振荡生长，花粉管顶端的ca ~ ( 2 + )浓度梯度和微丝的聚合?解聚状态会发生周期性变化。
Active transport the transport of molecules or ions across a cell membrane against a concentration gradient , with the expenditure of energy , usually in the form of atp 主动运输：伴随着能量的消耗， atp的产生，逆着浓度梯度的分子或者离子的跨膜运输。
Further suppose the container is the general cylindrical in shape , the boundary of the model is determined , the solution of the diffusion equation is solved 开发的扩散模型建立的理论依据是梯度输送理论即单位时间内物质通过单位面积的输送的通量与浓度梯度成正比。
Facilitated diffusion a passive transport of molecules across a cell membrane along a concentration gradient , mediated by carrier molecules or complexes , usually proteins 易化扩散（促进扩散） ：分子沿浓度梯度由载体分子或复合物（通常是蛋白质）作为媒介的一种被动跨膜运输。
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。
Methods 1 ) statistic methods including factorial experiment was carried out to optimize the major conditions for sample management , and the feasible negative and positive control for fcm analysis of cd62p expression were check out 方法1采用浓度梯度法优化gprp浓度条件，采用析因设计优化凝血酶浓度和37孵育时间条件，寻找最佳阴、阳性对照。
The effects of interfacial resistance , superheating , free convection due to both temperature and concentration gradients , mass diffusion and thermal diffusion , and variable properties in both the liquid and gas - vapor regions were considered 分析中，考虑了相间阻力、液膜波动、蒸汽过热度、因温度和浓度梯度引起的自然对流、质扩散和热扩散以及物性的变化。
