测定时间

Methods The plasma concentration of epigoitrin after ig administration with total alkaloids of Radix Isatidis was determined by HPLC method and the body temperature was recorded by electronic thermometer. The individual PK parameters were fitted using one compartmental model.

给大鼠ig板蓝根总生物碱，不同时间取血并对体温进行观察，采用高效液相法测定血浆中表告依春的浓度，用一房室模型计算药动学参数，采用3种药动学与药效学拟合模型，分别对药效学参数进行拟合。

The factors affect on the degree of substitution of product, yield and apparent viscosity, such as the mol rates of EPTAC with -NH2, reaction temperature, reaction time and the content of water in system have been discussed in detail. FTIR spectrometer and UV spectrometer are used to characterize the structure of the derivative and it is proved that substitution reaction mainly occurs on the -N element .The particle size and morphology of chitosan and quantemary ammonium salt of chitosan are analysised by comparing photos of their scanning electron microscope. The degree of substitution of HACC is determined by acid -base conductometric titration. An error in current formula of DS has pointed out and a correct formula has presented.On the base of experience of above experiment, the reaction conditions of HACC were systematically investigated through orthogonal design, and then the best conditions are found. Water-solubility and dependence of pH are studied.

壳聚糖和环氧丙基三甲基氯化铵在异相条件下发生反应，通过单因素实验，制备了一系列不同性能的壳聚糖季铵盐，本文首次详细讨论了反应条件(反应摩尔比、反应时间、反应温度、水含量)对产率及产物性能的影响；用红外光谱和核磁共振对结构进行表征分析时，发现季铵盐阳离子基以N位上取代为主；通过电镜图片对壳聚糖和季铵盐衍生物外观形貌进行对比，采用酸碱电导滴定法测定产物的取代度，并对常用取代度公式做了修正。

The result indicated that the process of coprecipitation foam separation could be regarded as a first order reaction.

结果表明该泡沫分离过程可等效为一级反应，结合停留时间分布测定对该过程的数学模型进行了分析讨论。

This paper illustrates the potential of cosmogenic neon exposure age in studying the eruption., surface morphology, and erosion history of young volcanic rocks, which are difficult to date using other conventional methods,such as K-Ar or 40Ar/39Ar dating.

本论文阐述了宇宙中氖的暴露时间在火山爆发，表面形态和新形成的火山岩的侵蚀过程研究中的潜力。这些研究用常规的方法，如钾-氩或40氩/39氩测定年代较难进行。

Without anthropogenic radioactivity, the initial 129I abundance of surface reservoir of earth is confirmed as 1.5×10^(-12) that can be used as starting value for calculation of cosmogenic 129I dating.

核试验和核事故释放的129I测定的是现代沉积物年代，测年时间尺度为50a。人们提出人类利用原子能之前地球表层初始129I丰度为1.5×10^(-12)，并以该值作为利用宇生129I估算年代的初始丰度值。

Specifically measured cosmogenic 3He/21Ne ratios, on the same samples, is powerful for evaluating the validity of calculated cosmogenic 3He and 21Ne surface exposure ages.

对同一样品进行具体的3氦/21氖比例测定，是评价3氦和21氖表面暴露时间计算值有效性的有力工具

Mefthods: The serum concentrations of penicillin V potassium were determined by microbiological assay in 10 healthy male volun-teers after an oral dose of 1500 mg penicillin V potassium in crossways. Data of serum leveltime were processed with 3P87 software.

以美国进口的青霉素V钾片为标准参比制剂，研究洛阳春都制药公司研制的青霉素v钾颗粒剂相对生物利用度。10名健康受试者随机交叉口服青霉素v钾被试及参比制剂各1500mg后，采用微生物法测定不同时间血清中药物浓度，用3P87软件经微机处理药-时数据。

The dags in experimental group were performed with anastomosis of intestine by using medical adhesive,while the dogs in control group were treated by using traditional modus operandi.

将分别测定两种吻合方法的操作时间、吻合口通畅程度、吻合口爆裂压、吻合口羟脯氨酸含量及标本组织病理学比较。

Objective To determine the content of blood strontium for diagnosis of deathful causes of drowning and postmortem submergence. Methods The content of Sr content in the water sample of Nan Du River on Hainan Province, and in the left heart's blood sample of rabbits died of drowning, postmortem submergence were determined with ICP-XSP. The results were compared with that the controls.

目的 研究动物溺水死后不同时间血锶的变化方法以高频电感偶合等离子体光谱分析仪检测外样水体中锶离子含量，并分别测定家兔溺死与死后入水的左心血的锶含量。

Some important control parameters,including the concentration of samples,the pumping rate,the ultrasonic intensity and dispersion time,and the selection of the deflocculant,are optimized for the establishment of a standard operation process for soft clay.

采用马尔文公司生产的Mastersizer Micro(MAF5000)激光衍射粒度仪测定江苏连云港地区软土的粒度分布，对样品质量浓度、泵速、超声波强度与时间、分散剂选取等控制参数进行了优化设计，确定合适的控制参数，便于对相同类型的软土测量确定标准操作规程。

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。