测定时间

Results showed that total plate count of cooled pork treated with lactic acid and citric acid decreased by 1.8 cfug^(-1), 1.5lg cfug^(-1) than that of the control, respectively when stored at the temperature of 4℃ for 7 days.

通过对不同贮藏时间的冷鲜肉中微生物数、挥发性盐基氮、pH值的测定和感官分析，研究复合有机酸对冷鲜肉的保鲜作用。

To estimate the bioconcentration factor of benzene derivatives in fish by gas chromatography retention time, this paper measured the BCF of chlorobenzene, o-chloro-toluene, p-dichlorobenzene, m-dichlorobenzene, 1,2-dichlorobenzene, nitrobenzene, p-chloro-aniline, p-chloro-nitrobenzene, and 4-chlorodiphenyl in grass crap, and the t_R of test derivatives on the stationary phases of six kinds polarity.

为了用气相色谱保留时间估算取代苯类化合物在鱼体内的生物富集系数，测定了草鱼对氯苯、邻氯甲苯、对二氯苯、间二氯苯、邻二氯苯、硝基苯、对氯苯胺、对硝基氯苯、4-氯联苯9种取代苯类化合物的BCF和不同取代苯化合物在6种不同极性固定相上的tR，建立了tR与BCF的一元回归方程及tR一阶分子连接性指数(1XV)与BCF的二元回归估算方程。

The recovery time in discriminating a 6' gap of Landolt Ring after abrief intense light was measured for dark-adapted eye of 11 male subjects withnormal vision.

在暗适应条件下对11名正常视力的男性受试者测定了进入眼内的闪光能量与恢复时间的关系。

Measurements of mean residence time and penetration of submicrometer aerosols in flows in tubes were made within the range of Reynolds numbers from 0.07 to 0.26 by widening of aerosols pulses analysis of monodisperse polystyrene spheres solid particles injected in clean nitrogen flow through a diffusion battery of capillary tubes.

在Reynolds数0.07～0.26范围内，采用亚微米聚苯乙烯球形硬气溶胶粒子脉冲，测定了气溶胶粒子在毛细管扩散池组中的谱带展宽，由此获得了气溶胶在毛细管中的平均保留时间和穿透率。

Ethyl cellulose membrane material has produced in physical modification method. The fundamental characteristics of reverse osmosis on EC membrane can be correlated with HPLC experimental conditions. By using EC membrane material as column packing, double-distilled water as mobile phase, the retention times are measured with suitable inorganic and organic compound as solutes.3. Complying with the retention times, the partition coefficient of the solute and the ratio of the surface excess concentration of solutewith the concentration of the parent fraction are calculated .

利用物理改性的方法研制了乙基纤维素(Ethyl Cellulose，简称EC)膜材料，并将其作为高效液相色谱柱的固体填料，以高效液相色谱模拟反渗透实验平衡条件，以水为流动相，选择合适的无机物和有机物作为溶质，测定乙基纤维素对它们的相对保留时间及平衡分配常数K_A′。3。

Methods During 2006.10-2007.5,twelve sessions hemodialysis of nine patients with active bleeding were conducted with regional citrate anticoagulation.The BUN,Cr,and ACT were determined before and after dialysis.In addition,ACT was also measured at the artery and venous end.

9例活动性出血肾衰竭患者12次行RCAHD，检测透析前后肾功能、电解质，并测定透析前后及透析器动、静脉端活化凝血时间，观察RCAHD的溶质清除效能及对电解质、出凝血指标的影响。

Latest researches in the catalysts for synthesis of carbamate by ammonolysis of dimethyl carbonate;2. Progress in the catalysts for synthesis of carbamates by ammonolysis of dimethyl carbonate;3.4,4′-Methylene diphenyl carbamatewas synthesized by ammonolysis of dimethyl carbonate, a substitute of phosgene, and 4,4′-diaminodiphenyl methane with anhydrous zinc acetate as catalyst.

用碳酸二甲酯代替光气，以4，4′-二氨基二苯基甲烷为原料，在无水醋酸锌催化剂的作用下，经胺解反应合成了4，4′-二苯甲烷二氨基甲酸甲酯；测定了MDC的熔点；采用傅里叶变换红外光谱和氢核磁共振对产品结构进行了表征；考察了反应温度、DMC用量、反应压力、反应时间、催化剂用量对MDC收率的影响。

However, for a femtoampere level of current, it may be better to use the coulombs function of an electrometer to measure the change in charge over time and then use those charge measurements to determine the current.

对飞安级电流，用静电计的库仑表功能测量整段时间的电荷变化量和用这些电荷测定电流更好。

Methods L9(34) orthogonal test was conducted to evaluate the effects of ethanol concentration, ethanol consumption, extraction duration, and extraction time on the extraction by using the content of four kinds of sanchinosides and the content of the total flavonoids in axillary choerospondias fruit that were included in the recipe of Danxinshu capsules. HPLC and ultraviolet spectrophotometry were used in the assay of cumarin.

分别采用高效液相色谱法和紫外分光光度法测定方中三七的3种皂苷的总含量及广枣的总黄酮的含量，以两者含量的综合评分为指标，采用正交实验考察乙醇浓度、乙醇用量、提取时间、提取次数4个因素对提取效果的影响。

The wavelength of the instrument used to measure the change in absorbance of dosimeters and the instrument used to measure their thickness should be subject to regular checks of calibration at intervals established on the basis of stability, purpose and usage.

用来测量辐射量测定器吸光率改变的仪器的波长和用来测量它们厚度的仪器应定期进行校验，按照根据稳定性，目的和用途为基础建立的时间间隔进行。

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。