Objective To assay the concentration of neurotrophic factors secreted by human schwann cells that were cultured in vitro and to observe the time-concentration relationship.
目的测定体外培养的人雪旺氏细胞分泌神经营养因子在各时间点的浓度并观察其时间-浓度关系。
In situ end-labeling method (POD) indicates:HL-60 cells apoptosis induced by Liu-Shen-Wan alcohol extraction have time-concentration dependency relation within certain ranges;
原位末端标记表明：六神丸乙醇提取剂诱导HL-60细胞凋亡在一定范围内呈时间-浓度依赖关系；
The viability of rat glomerular endothelial cells was inhibited by ioversol in a concentration and time dependent manner.
非离子型低渗造影剂碘佛醇能显著降低大鼠肾小球内皮细胞存活率，并呈剂量和时间依赖性。
So this is where the concentration of B is roughly constant over time.
那么这是B的浓度，粗略地随时间变化保持常量。
So this is moles per liter per second, right? It's disappearance of some concentration for time.
所以这里的单位是摩尔每升每秒，对吗？这代表浓度随着时间的减少。
When group together, tasks require a lot less time, effort and concentration.
当归类到一起，任务就会更少花费你的时间、努力和专心。
So if you were to sketch it out as a function of time, eventually you'll get to the concentration a equilibrium.
那么如果你把它作为时间的函数画出来，最终你会达到浓度A平衡。
Psychologically defined, concentration is the process of centering one's attention over a period of time.
按心理学定义，专心是一段时间内集中注意力的过程。
The focus and concentration on one task at a time pays dividends in faster and better quality writing.
在某个时间，专心致志的去写文章，就会写的比较快，文字质量也会很高。
It will tell us how the concentration at a given point varies over time in terms of how the concentration varied in space.
它告诉我们，给定点处的浓度随着时间的变化，浓度在空间的分布是怎样的。
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。
For copper, she said, the LC50 (the concentration lethal to half of any given species over a certain time) decreases with temperature - meaning that toxicity increases.
她说，对于铜来说，半数致死浓度lc50(一定时间内受试动物半数死亡的毒物浓度)随温度减弱-这就意味着毒性增加。
For the same reason, we tend to exaggerate the amount of concentration existing at any given time.
出于相同的理由，我们很容易夸大在某一特定时期高度集中的企业的数量。
But I can do those things comfortably because reading a website, a comic book, or a magazine article does not take the length of time and the concentration commitment that reading a book does.
但我之所以能够舒适地做这些事情，是因为上网、看漫画或者读杂志不像读书一样要持续花上很长的一段时间。
Keeping track of these time shifts takes concentration, since theauthor will sometimes deliberately blur the line between war as grand drama andwar as farce.
因为(读者)时刻追溯时间的转变要花费很多精力，所以，作者有意地不时模糊战争的宏伟场景和战争闹剧之间的界限。
The new results increase the water estimate to about 40 gallons, and by estimating by amount of dirt excavated by the impact, calculated the concentration of water for the first time.
新的研究结果表明除掉撞击中所产生的尘埃物质外，估计的含水量增加到40加仑，这是首次测算水密度。
Effects of reaction temperature, oxygen concentration, catalyst dosage and reaction time on oxidation of benzyl alcohol were investigated.
考察了反应温度、氧浓度、催化剂用量以及反应时间对苯甲醇氧化的影响。
The EEL represents a cumulative exposure limit taking into account both the time of exposure and the concentration at which the exposure occurs.
eel代表了一个既考虑了暴露时间又考虑了暴露发生时的浓度的累积的暴露极限。
Prepared with this combination, the enzymic protein expression, enzyme activity and activity ration are significantly higher than other treatments of concentration and time.
此技术组合生产的酶蛋白的表达量、酶活性和比活性，均显著高于其他浓度和时间的处理。
Results: FHD could shorten sleep time distinctly and reduce alcohol concentration in blood of acute alcohol toxicity mice.
结果：枳椇子明显缩短乙醇诱导的小鼠睡眠时间，并能降低血中乙醇的浓度。
Reaction time, temperature, concentration of acid and different kinds of organic acid to the degradation speed of chitosan are studied.
试验研究了不同有机酸及反应时间、温度、酸的浓度对壳聚糖降解速度的影响。
The effects of monomer concentration, initiator, reaction temperature and time on copolymerization were studied.
考察了单体浓度，引发剂浓度，反应温度和时间等对共聚反应的影响。
Synthesis process of benzophenone hydrazone is studied with benzophenone and 80%hydrazine as raw materials. Effects of material ratio, reaction time and concentration on aimed products are explored.
研究了以二苯甲酮和80%水合肼为原料，合成二苯甲酮腙的工艺，探讨了物料配比、反应时间、浓度等对目的产物收率的影响。
The other preparation conditions, such as monomer concentration, temperature, and time of polymerization, were systematically studied.
本文还对其它制备条件，比如单体浓度，温度，聚合反应时间都进行了系统研究。
The effects of fetal bovine serum (FBS) addition time, concentration and different culture systems on the developmental potentiality of bovine parthenogenetic embryos were observed.
试验研究了培养液中血清的添加时间和添加浓度及不同培养体系对黄牛孤雌胚胎体外发育潜力的影响。
The factors which affect the deacetylation degree of chitosan and the viscosity, e. g. reaction time, base concentration and food rate are discussed.
并讨论了影响壳聚糖脱乙酰度和粘度的因素，例如，反应时间，碱浓度，料比。
The factors which affect the deacetylation degree of chitosan and the viscosity, e. g. reaction time, base concentration and food rate are discussed.
并讨论了影响壳聚糖脱乙酰度和粘度的因素，例如，反应时间，碱浓度，料比。
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