In response to the appearance of such variants in the cell population the concentration of the toxic chemical in the growth medium is increased, thus keeping the selection pressure constant.
为应对细胞污染中出现的变异，有毒物质的浓度是逐步增加的，以此保证筛选力度的稳定。
Now, scientists report that they've created a contact lens that can deliver a high concentration of antibiotic at a constant rate for more than 30 days.
目前，科学家报告称他们已经创造出了一种隐形镜片，它能以固定速度持续释放高浓度抗生素超过30天。
In other words, the concentration of at any time is given by the initial concentration, t minus the rate constant times time.
换句话说，任意时刻A物质的浓度等于初始浓度，减去常数乘以时间。
Sharpness of saw blades will be improved with coarsening of grit size under the condition of constant diamond concentration.
当金刚石浓度不变时，适当增大金刚石粒度，锯片锋利性也能得到提高。
In the logarithmic phase of growth, according to an exponential law, the growth rate constant and heat output at different concentration of pilose autler had been calculated.
按指数生长模型计算出生长速率常数和总发热量，进而求出最佳用药质量浓度。
It must choose the sizing agent with high concentration, low viscosity and high fluidity, so can guarantee the constant sizing rate and suitable coverage and soakage.
必须选择高浓度、低粘度和高流动性的浆料组合，以保证恒定的上浆率和比例恰当的被覆与渗透。
The experiment showed that the overhead concentration rises to a primarily stable value after the solvent is introduced and keeps constant during the product withdrawing.
实验表明，在加入溶剂后全回流操作一段时间后，塔顶浓度上升基本稳定，而且在产品采出过程中塔顶浓度也维持稳定。
The results show that the formation of dimers depends on the nature of substituent group, dielectric constant of solvent, and concentration.
结果表明二聚体的形成取决于取代基团的性质以及溶剂的介电常数与溶液浓度。
This paper introduces how to seek the equilibrium constant of consecutive reaction by using the method of limiting value and by the determination of single component concentration.
介绍了利用求极值的方法，通过对反应体系中单组分平衡浓度的测定，求连串反应的平衡常数。
The paper introduces a automatically controlling method which is able to maintain constant concentration of the pulp discharged from a concentrator through example.
根据具体事例，介绍了一种能使普通浓密机的排矿浓度保持恒定的自动控制方法。
The ratio of the square of certain concentration gas diffusion depth and diffusion time is constant when it diffuses and reacts through the solids bed.
一定浓度的气体通过固体颗粒层扩散-反应时，其扩散深度的平方与扩散时间的比值为常数。
The results show that saw blades will be more sharper with reducing of diamond concentration under the condition of constant grit size of the saw blades.
并通过理论计算与分析得出结论：当金刚石粒径不变时，适当减少金刚石浓度，锯片锋利性得到提高；
Increase of concentration of solution and flow velocity brought about rise of adsorption rate constant and "quasi-equilibrium" adsorption amount.
溶液浓度、流速提高，吸附速率常数及“准平衡”吸附量随之加大。
CONCLUSIONS This method is sensitive with constant result and rapid for determining fenofibric acid concentration in rabbits plasma.
结论：该法操作简便，结果可靠，适用于非诺贝特酸家兔血药浓度的测定。
This experiment researched that whether the numerical value of equilibrium constant could be affected because of the differences of the reactant's concentration.
本实验探讨了平衡常数的数值是否会因反应物起始浓度不同而发生变化。
The tests showed that the rate constant value increased with the dipped temperature raise and the increment of the DEHA's initial concentration in the PVC film.
实验结果表明：速度常数随浸泡温度的上升和PVC膜中DEHA的起始浓度的提高而增加。
In experimental studies the authors considered the behaviour of various metals under constant and variable stresses, stress concentration, influence of way of loading on creep rupture;
在试验研究中本文考虑了各种金属在恒应力与变应力下的行为，应力集中，加载方式对蠕变破坏的影响；
Rate constant (K) of degradation increases with increasing the gas flow rate or decreasing the initial sodium lignosulfonate concentration.
气体流量越大，木质素磺酸钠的初始浓度越低，速率常数K越大，降解效果越好。
In order to overcome the disadvantages of traditional method of gas concentration detection, a new method is proposed which keeps thermal conductivity sensor at a constant temperature.
为了克服传统热导传感器气体检测方法的诸多缺陷，提出了一种使传感器保持在恒温状态的气体浓度检测的新方法。
Conclusions This study suggested that with other parameters kept constant, excessively low concentration of polymer solution or high flowing rate cannot produce the ideal structure of fiber scaffolds.
结论当其他参数一定时，溶液浓度过低或流速过大均无法得到理想的纤维结构。
Faraday rotatory glass containing high paramagnetic ion concentration is of the large Verdet constant, transparency in the visible region of light.
含高顺磁离子的旋光玻璃具有大的费尔德常数，可见区高透过等优点。
In the saline-treated group, the plasma concentration of rocuronium and depth of block remained constant.
在盐水处理组，血桨中罗库溴铵浓度及阻滞的深度保持不变。
We furthermore found that an appropriate buffer ion can intensify the binding although its concentration and acidity remain constant (8).
我们进一步发现适合的缓冲离子能强化结合，虽然它的浓度和酸度都保持不变。
When concentration of toluene was constant, the lag period of TCE increased, and the rate and extent of degradation decreased with the concentration of TCE increasing.
当甲苯初始质量浓度一定，TCE质量浓度增加时，TCE降解之前的滞后期延长，且降解速率和降解程度减小。
Carr too thinks we're growing dependent on a constant stream of information: the Net seems to be... chipping away my capacity for concentration and contemplation.
凯尔页认为我们正变得依赖不变的信息流：“…网络似乎正…销毁我集中精神和冥思的能力。”
Experimental results show that the apparent adsorption rate constant decreases with increasing substituted benzoic acids concentration.
实验结果表明表观吸附速率随取代苯甲酸浓度增大而降低。
Glucose had little effect on metabolism of the yeast cells when glucose concentration was much higher than saturation growth constant KS.
当发酵液中的葡萄糖浓度远大于饱和生长系数KS时，酵母细胞的生长代谢规律受葡萄糖的影响很小。
Objective To investigate the effect of acute hypervolemic hemodilution (AHHD) on plasma concentration of propofol by constant infusion.
目的观察急性高容血液稀释后恒速输注异丙酚血药浓度的变化。
Objective To investigate the effect of acute hypervolemic hemodilution (AHHD) on plasma concentration of propofol by constant infusion.
目的观察急性高容血液稀释后恒速输注异丙酚血药浓度的变化。
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