Objective To explore the active constituents in different parts from the root, stem and leaf of Zantedeshia aethiopica by pre-experiment.
目的通过预试验，研究马蹄莲根、茎、叶三个部位可能的化学成分，以寻找有效成分的主要存在部位。
Therefore, based on the principle of the dissolution in the similar material structure, the better solvents were firstly decided through pre-experiment.
为此，根据相似相容原理初步试验筛选出结晶分离用较佳溶剂。
This experiment was conducted to study the biological characteristics and effects of pre-fermentation microcapsulated Lactococcus lactiss on growth performance of broilers.
本试验旨在研究发酵前包被微囊化乳酸乳球菌的生物学特性及其对肉仔鸡生长性能的影响。
The rolling experiment with lead as blank material is made in D51-160A hot ring rolling mill and the qualified pre-rolled ring of conical ring with inner steps is rolled.
采用铅环件试样在D51- 160A热轧环机上进行轧制实验，轧制出了合格的内台阶锥形环件预轧制环件。
Using the system has done a pre-test experiment, the laser displacement sensors were calibrated, and data collected were analyzed and processed.
利用该系统做了前期的测试实验，对激光位移传感器进行了标定，并对采集的数据进行了分析与处理。
Skill of chemistry experiment is an important skill that pre-service teachers should master.
化学实验技能是职前化学教师应该掌握的一项重要技能。
The experiment results show that the new method is a simple and efficient method for direct detection of trace drug, toxicant and their metabolites in biological samples without sample pre-treatment.
实验结果表明，该法是一种简便、有效、不需进行样品预处理而可直接对生物样品中药物和毒物进行检测的方法。
Through the field experiment concerned, the necessary parameters for the numerical calculation of the pre-stressed anchorage are obtained.
通过预应力锚杆的现场试验，获取了数值计算所必需的参数。
The results of the experiment using this arithmetic to construct CL multi-wavelet pre-filter show that not only the compute speed is fast, but also the stability is remarkable improved.
利用本算法构造CL多小波前置滤波器的实验结果表明，本算法不仅计算速度快，而且稳定性也得到了显著提高。
To improve experiment results, teachers should carry out pre-class coaching before class, guide the students in the course of the experiment and analyze and sum up the experiment after class.
为了提高实验效果，教师应在课前进行预习辅导，在实验过程中进行操作指导，在实验后进行分析总结。
The experiment shows that after pre-stimulation, life forms produce tolerance to heat shock or other stimulations.
实验表明，经过预应激处理后，生物机体对再次热休克或其它应激刺激产生耐受；
The experiment includes three steps:the pre-test, the process of developing CC and the post test.
该实验过程主要包括前测，实验培训过程和后测三个阶段。
Taking the single pylon single cable plane pre-stressed concrete cable-stayed bridge as example, the paper discusses the principle, methods, testing items, and experiment conditions, etc.
文章以一座单塔单索面竖琴式预应力混凝土桥为例，详述了静动载试验的原理、方法、过程、测试项目、试验工况等。
The experiment of static structural recovery on pre-sheared non-Newtonian crude oil has been performed by small amplitude oscillatory shear.
通过小振幅振荡剪切试验，对经历预剪切的非牛顿原油在静置条件下的结构恢复性进行了研究。
It has been improved by experiment that the physical and chemical performances of the Sialite Binding Material can be improved evidently by magnetic pre-treating the mixture of sialite and water.
采用磁化技术对凝石拌和水进行磁化预处理，可显著提高凝石胶凝材料的理化性能。
A new method is presented for making 2d rainbow holograms by using pre modulated holographic plate. The principle of this method and the related experiment are discussed.
提出一种用预调制全息干版制作二维彩虹全息图的相干——非相干记录方法，说明了该方法的基本原理，并进行了实验验证。
The experiment is divided into the following four stages: circumstantial experience, pre-measurement, education intervention, and after-measurement.
实验分为情景体验、实验前测量、教育干预和实验后测量四个阶段。
Influence of the workpieces pre-hole diameters and passes on thick-wall cylinders hole flanging is investigated by experiment and numerical simulation.
采用实验研究和数值模拟的方法，分析了工件预加工孔径和孔型参数对厚壁筒体翻孔工艺的影响。
The experiment is divided into five parts: questionnaire, pre-test, class teaching, post-test and results analysis.
实验过程分为五部分：问卷调查、前测、课堂授课实验、后测和结果分析。
Table 2. Effect of pre - and post-weaning nutrition on pig performance to 129 days post-weaning (Experiment 1; Lawlor et al., 2002a).
表2、断奶前后的营养对断奶后129天的生长性能的影响(实验1；劳勒等，2002)。
Fourthly, study on the in vitro gas production experiment of pre-and post-ensiling of forage sorghums of different varieties and maturity.
不同品种不同生育期饲用高粱青贮前后人工瘤胃产气量研究。
Fourthly, study on the in vitro gas production experiment of pre-and post-ensiling of forage sorghums of different varieties and maturity.
不同品种不同生育期饲用高粱青贮前后人工瘤胃产气量研究。
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