测定时间

Methods: The brucine and strychnine in the micropowder and powder of Semen Strychi were determined by HPLC to calculate the cumulative release at different time.

以马钱子碱和士的宁为指标，用HPLC测定马钱子粉和马钱子微粉在不同时间马钱子碱和士的宁溶出的量，计算累积释放率。

Objective: To develop a new method for determination of caffeic acid in Herba Lycopi by HPLC and analyze the samples from different habitats and collecting time.

中文摘要：目的：建立泽兰中咖啡酸的高效液相色谱含量测定方法，并对不同产地和采收时间的14个样品进行了定量分析。

In this thesis,the changes of the circulation-time according to different size particles of the broad size coarse carbamide particles were studied.

本文选用宽粒度分布大颗粒尿素物料，在带导流管的喷动流化床中，测定了在不同操作参数条件下，不同粒径粒子的平均循环时间。

The results suggested that the best determining condition of Dendribum nobile polysaccharides is use Carbolic acid 1.5mL and Sulfuric acid 6mL for 30min.

结果表明，金钗石斛多糖含量测定的最优条件是加入苯酚1.5mL，浓硫酸6mL，反应时间30m in。

In the determination of methyl acrylate,butyl acrylate and methyl methacrylate in ambient air,the sample was absorbed with active carbon and resolved with carbon bisulfide,and then determined by GC.

测定环境空气中的丙烯酸甲酯、丙烯酸丁酯和甲基丙烯酸甲酯时，气样采用活性炭吸附，用二硫化碳解析，直接进气相色谱仪检测，根据保留时间定性，外标法定量，能获得良好的线性和较低的方法检出限，不仅精密度、灵敏度和重复性良好，而且可操作性强，易于在环境监测系统中推广。

In the determination of methyl acrylate,butyl acrylate and methyl methacrylate in ambient air,the sample was absorbed with active carbon and resolved with carbon bisulfide,and then determined by GC.After the qulitation by retention time and quantitation by external standard method,the good linearity and low detection limit were got.

测定环境空气中的丙烯酸甲酯、丙烯酸丁酯和甲基丙烯酸甲酯时，气样采用活性炭吸附，用二硫化碳解析，直接进气相色谱仪检测，根据保留时间定性，外标法定量，能获得良好的线性和较低的方法检出限，不仅精密度、灵敏度和重复性良好，而且可操作性强，易于在环境监测系统中推广。

Within a fairly short time after their discovery, historical, paleographic, and linguistic evidence, as well as carbon-14 dating, established that the scrolls and the Qumran ruin dated from the third century B.C.E.

在他们的发现之后相当短的时间里，历史的，古文书学的，语言学，和碳-14测定证据确立了古卷和库姆兰会社遗址开始于公元前第三世纪直到公元前68。

"We were unable to detect a catch-up period during the study," Dr. Jones said.

"在这个研究中，我们不能测定出早产儿的肺功能赶上足月儿的时间。"

The results show that DFR-corrosion-influence-factors are decreasing as the increasing of ground-corrosion-time and the aggravating of environments causticity. The influence of corrosion fatigue is much serious than that of ground-corrosion. The example of structure fatigue analysis with DFR method under corrosive environment shows the detail steps and data requirements.

通过试验测定了各种典型情况的DFR腐蚀影响系数，试验结果说明DFR腐蚀影响系数随着地面停放腐蚀时间的增加和环境腐蚀性的增强而降低，腐蚀疲劳的影响较停放腐蚀的影响更严重。

Methods this experiment chose seven parameter of cell nuclear, including the area and integral optical density, determined the changes of DNA content in the kidney cellule of 15 rats at different intervals between 0 and 48h postmortem with auto-TV-image system.

方法应用电脑图像分析技术，测定了15只大鼠在死后48h内不同时间点大鼠肾细胞核DNA含量的面积、等效直径（Mean－Dia，MD）、异形指数（Indexofdensity，ID）、平均光度（Average optical density，AOD）、积分光度（Integral optical density，IOD）、密度变化数（L－Den－Coe，LDC）和平均灰度（Averagegray，AG）等七项参数的变化值。

The split between the two groups can hardly be papered over.

这两个团体间的分歧难以掩饰。

This approach not only encourages a greater number of responses, but minimizes the likelihood of stale groupthink.

这种做法不仅鼓励了更多的反应，而且减少跟风的可能性。