浓度测定

The evaluation of the joint toxicity of Cd and Zn was carried out based on the principle of the additive index of aquatic toxicological effects, and LC50 was obtained with the SPSS 11.5 software package by probit analysis of the bioassay.

在此基础上，根据水生毒理联合效应指数相加法原理，利用生物测定计数型机值分析得到毒性单位浓度LC50值进行判断。

After tail iv injection, the blood exposure time of stealth liposomes and the area under blood drug concentration-time curve were pronouncedly increased, compared with the regular liposomes group and the free doxorubicin group,respectively.

以化学梯度法包封脂质体，用两亲性聚乙二醇-二硬脂酰磷脂酰乙醇胺对脂质体膜进行修饰以制备隐形脂质体；用HPLC-UV法测定给药后小鼠体内组织中的药物浓度。

To test the activity of neutral proteinase in the definite salt concentration may be more effective and proper in the soy sauce.

所以在酱油酿造过程中，在一定的盐浓度下测定中性蛋白酶活力才是更客观更有效的。

The organic blend acids preparation were supplemented into basal diet of AVIAA chicken by 5 g/kg、10 g/kg 、15 g/kg.The performance,pH in proventriculus and digestibility of nutrition elements were determined.

在饲料中添加不同浓度(5 g/kg、10 g/kg、15 g/kg)的有机复合酸化剂对艾维茵肉仔鸡进行饲养试验，测定了其营养成分的消化率，并在不同饲养时间检测腺胃pH。

Diurnal changes of Pn and environmental factors (photosynthetic available radiation and air temperature and relative humidity) and physiology factors (stomatal conductance and transpiration rate and intercellular CO2) in leaves of puna chicory were measured using CI-340 portable photosynthesis system.

利用CI-340便携式光合仪，测定了普那菊苣叶片净光合速率和环境因子（气温、光合有效辐射、空气相对湿度）、生理因子（蒸腾速率、胞间CO2浓度、气孔导度）的日变化；通过回归和通径分析，考察了影响因子对净光合速率日变化的影响。

Density, surface tension and rheological characteristics are the essential properties of the non-Newtonian fluid. Pycnometer, surface tensiometer, and rheometer were adopted respectively to measure the density, surface tension and rheological characteristics of 0.25%, 0.50%, 0.75% PAM aqueous solutions at 293.15K. The parameters of equations were fitted in terms of the experimental data.

密度、表面张力和流变性质是非牛顿流体的基本性质，本文采用比重瓶、表面张力仪和流变仪分别测定了293.15K温度下质量浓度依次为0.25%、0.50%和0.75%PAM水溶液的密度、表面张力和流变性质，并对数据进行了关联，拟合了方程参数。

The method is a traditional colorimetry and is direct ratio with the content of Pyrethrin pesticide and absorbency in a concentration area. The best absorbency wavelength is 505nm and it is ideal about the recovery.

本方法采用传统的比色法，在一定浓度范围内拟除虫菊酯类农药的含量与吸光度呈正比关系，最佳测定波长为505nm，样品的回收率比较理想。

Methods MTT assay was applied to determine the sensitivity of hepatoma H22 cell to pyridoxine at various concentrations(0、2、3、4、6mmol/L) for different incubation times(24、48、72hours).

应用MTT法，测定吡哆醇在不同浓度及不同作用时间对小鼠肝癌细胞的抑制作用。

The fungal control spectrum of α-pyrone 0.2% WP was investigated using a mycelial growth rate assay. PDA culture medium containing 20 μg/ml of the pesticide inhibited all of the 11 pathogenic fungi tested.

采用菌丝速率法测定了0.2%α-吡喃酮WP的抗菌谱，含药浓度20μg/ml的PDA培养基对测试的11种植物病原真菌均有抑制作用，其中对禾谷丝核菌的抑制作用最强，抑制率为89.3%。

OBJECTIVE:This paper reported a reverse phase HPLC for simultaneous determination of quinidine,lidocaine and propafenone in human plasma.

目的 ：建立反相高效液相色谱法同时测定人血浆中奎尼丁、利多卡因及普罗帕酮的浓度。

She gently rebuff ed him, but agreed that they could be friends

她婉言拒绝了，但同意作为朋友相处。

If in the penal farm, you were sure to be criticized.

要是在劳改农场，你等着挨绳子吧！