超声波的

The effect of ultrasonic wave on extraction rate of corn cob xylan was studied.

本论文考察了用超声波法提取玉米芯木聚糖时各因素对提取率的影响。

The experimental results showed that ultrasonic cleaning of broznes in dilute sodium hexametaphosphate solutions are effective, this method was used for the brozne treatment firstly. We have also improved "zinc dust treatment method"and satisfactory results were obtained.

在工作中，首次应用了在六偏磷酸钠稀溶液中超声波清洗青铜器这一方法；对锌粉转化封闭有害锈方法进行了改进；选用ParaloidB－72材料做为青铜器苯骄三氮唑处理后的封护材料。

A multi degree-of-freedom ultrasonic motor using in-plane deformation of lead zirconate titanate elements was proposed.

提出一种基于压电陶瓷平面内应变的多自由度超声波电机。

The effects of reaction temperature,reaction time,ultrasound frequency,agitating velocity and HCl amount on the yield and purity of abietic acid were investigated by orthogonal experiment.

通过正交优化实验考察了反应温度、反应时间、超声波频率、搅拌转速、盐酸用量对枞酸单离收率和纯度的影响，确定最佳异构化反应条件为：超声频率47.2 kHz，反应温度55℃，盐酸用量0.06 mL盐酸。

The allylation reactions of aldehydes with allyl bromide were carried out in 76%～93% yields with Nd-SnCl2-H2O under ultrasound irradiation at room temperature for 50～60 min.

在Nd-SnCl2-H2O体系中，用烯丙基溴超声诱发下进行了一系列芳香醛的烯丙基反应，室温反应50～60min得76%～93%烯丙基化产物；而不用超声波时同样体系中搅拌3～4h高烯丙基醇产率为30%～86%。

The allylation reactions of aromatic aldehydes or ketones with allyl bromide were carried out in 60%～98% yields with Sn/H2O under ultrasound irradiation at room temperature for 45 min.

超声波作用下，Sn/H2O体系中，芳香醛酮在室温下进行烯丙基化反应，45min内得到60%～98%的烯丙基化产物

To study on extraction of essential oil from Alpinia officinarum Hance by cellulase and ultrasonic, the effects of ultrasonic time, temperature and time of water bath, amounts of cellulase on the extraction efficiency of essential oil from Alpinia officinarum Hance were investigated. And the influence of the four factors was determined by orthogonal experiment.

研究了酶法、超声波辅助水蒸气蒸馏法提取高良姜中的挥发油，对超声时间、水浴温度、酶作用时间、酶用量进行单因素实验分析，在此基础上做正交实验。

It is car parking or reversing the safety of assistive devices, ultrasonic sensors, the controller and display, and other components.

它是汽车泊车或者倒车时的安全辅助装置，由超声波传感器、控制器和显示器等部分组成。

Ultrasonic Cleaner is mainly used to clean the solid material surface or disperse powder, in order to well-distribute powder in liquid and to watch on electron microscope conveniently. The source of ultrasonic wave adopt stir up-like or the autoexcitation type to work, computer control.

超声波清洗器主要用于清洗固体材料的表面，也可用于超声分散粉末类样品，使粉末颗粒均匀分散在液体中，以便在电镜上观察。

ObjectiveTo develop an extraction process of organic acids from Capsella buras-pastoris by ultrasonic extraction.

目的采用超声波提取荠菜中的有机酸。

According to the clear water experiment, aeration performance of the new equipment is good with high total oxygen transfer coefficient and oxygen utilization ratio.

曝气设备的动力效率在叶轮转速为120rpm～150rpm时取得最大值，此时氧利用率和充氧能力也具有较高值。

The environmental stability of that world - including its crushing pressures and icy darkness - means that some of its most famous inhabitants have survived for eons as evolutionary throwbacks, their bodies undergoing little change.

稳定的海底环境─包括能把人压扁的压力和冰冷的黑暗─意谓海底某些最知名的栖居生物已以演化返祖的样态活了万世，形体几无变化。