超声波

MethodsThe flavonoids were extracted with ethanol as the solvent from Cyperus rotundus by ultrasonic wave. Spectrophotometry was used to determine the flavanone of Cyperus rotundus .

方法采用超声波乙醇浸提法从香附中提取黄酮类物质，对所提取的黄酮类物质进行验证，并用分光光度法测定含量。

Methods: The saturated water solution mixing method was compared with microwave method and ultrasonic method by determining the ultilization ratio of the volatile oil in Dalbergia odorifera.

以挥发油包合率为评价指标，比较饱和水溶液搅拌法、微波法及超声波法，以正交实验优选最佳工艺条件，并用TLC对包合前后的挥发油性质进行分析。

The results showed that the chitosan had the viscosity of 2886.7 mpa · s and the deacetylate rate up to 97.17% under the optimal reaction condition: temperature 50℃, 3 h reaction period, and 50% NaOH.

结果表明，用超声波制备高黏度壳聚糖的最佳反应条件是：反应温度为50℃，反应时间为3h，NaOH溶液的浓度为50％，可以得到黏度为2886.7mpa·s、脱乙酰度达97.17％的壳聚糖。

Ultrasonic was applied in the acid removal treatment of high acid crude using glycerol as esterification deacidification agent.

将超声波技术应用到高酸原油酯化反应脱酸中。

Find failure root cause by performing component eletrical and physical failure analysis, such like curve tracing, SAM, decapsulation, cross section, SEM etc.

通过对半导体器件进行电性及物理失效分析，例如电性曲线分析，超声波扫描，开盖，断面，电子扫描显微等，找出失效的真正原因。

This paper gives the principle, range,characteristic and recent progress of ultrasonic applications in the cleaning, extraction, crystallization/decrystallization, emulsi-fication/demulsification, sonochemistry and oil extraction and so on.

本文主要对超声波在清洗、萃取、结晶粉碎、乳化破乳、超声化学、采油等化工领域中的应用原理、范围、特点和现状进行评述。

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。

This article introduced the technology of ultrasound, including the principle of its action and its use in the papermaking, mostly in the use of fibre pretreatment, deink ing and the treatment of wastewater.

主要介绍了超声波技术在纤维预处理、废纸脱墨及废水处理方面的研究现状。

Ultrasound irradiation can enhance the waste oil to demulsify and to dewater effectively.

超声波辐照能有效促进污油破乳脱水。

According to the structure and property of feather fibre fabric and the sizing ingredients,choosing the biological catalyst-enzyme which has high catalysis efficiency and undivided reactivity,to desize the feather fibre fabric ,the paste would be removed quickly and efficiently.

在羽毛纤维织物结构性能基础上，结合织物上所含浆料的组成，选择催化效率高、反应专一的生物催化剂酶对羽毛纤维织物进行退浆处理，可以快速、高效退除织物上的浆料，同时酶退浆时反应条件温和，不需要高温、高压、强酸、强碱的作用条件；采用超声波对羽毛纤维织物进行退浆可以缩短处理时间、降低处理温度，减少药剂用量，而处理效果优于常规法退浆。

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。