超声波

The phase diagrams of PEG/phosphate aqueous two-phase systems and the partition properties of BSA in the systems The PEG/phosphate aqueous two-phase system was regarded as the research object, the contents of phosphate and the polyethylene glycol in the system were measured by weighting and freeze-drying method respectively. Two diagrams were successfully drawn, and the characteristics such as binodal curves, tie lines and lever rule of the phase diagrams of the aqueous two-phase systems were described, as well as the achieved phase diagrams were qualitative analyzed with thermodynamics.

本论文以聚乙二醇／磷酸盐双水相系统相图和相分离过程及牛血清清蛋白在双水相系统中的分配特性为研究基础，从探讨超声波对双水相系统组成物质磷酸盐和PEG溶液的作用机理入手，建立了静态环境中双水相萃取过程的相分离数学模型，揭示了超声波对双水相系统组成和溶质分配效率影响的规律。

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

方法采用单因素实验/正交实验，研究了温度、超声波作用时间、料液比、超声波功率对荠菜中有机酸提取量的影响规律。

The results were as follows:ethanol volume fraction 70%,solid liquid ratio 1∶10,extraction time 10 min,temperature 50℃,ultrasonic power(160 W). Capsella bursa-pastoris ; alkaloids ; ultrasonic ; extraction

近年来，人们用超声波技术提取植物中的生物碱、黄酮、多糖、皂甙、蒽醌、香豆素等生物活性物质[3，4]，结果都表明超声波提取比常规提取法费时少

When form solid film, cavitate bladder blow up in ultrasonic power, bring thousands K high temperature in the thumbnail time and the thumbnail spare, go with strong bow wave and mirshoot flow, it can intensify the process of mass transfer, so reaction rate with ultrasonic wave have higher than without ultrasonic wave.

固态膜形成后，在超声波作用下空化泡崩溃，在极短时间内和极小空间中产生几千K的高温，伴生强烈的冲击波和微射流，强化传质过程，因此在超声波作用下磷矿的分解率比无超声作用时的分解率高。

Results indicate that the optimum extraction conditions are as follows: ultrasonic power is 600W, temperature is 53℃, the ratio of liquid to solid is 8︰1, ultrasonic treating time is 70min, reflux extraction time is 120min, the extraction rate of oleanolic acid is 3.000 mg/g; XDA-1 resin is favorable in purification of OA in Chaenomeles sinensis Koehne, the optimum purification conditions are found to be 0.794 mg/mL of OA concentration, the flow rate of adsorption is 0.5 mL/min; the desorption solvent is 90% ethanol, and the flow rate of elutant is 1.0 mL/min.

结果表明，超声波辅助提取最佳工艺条件为：超声功率600 W、提取温度53℃、液料比8：1、超声波提取70 min，回流提取120 min，齐墩果酸得率为3.000 mg/g；XDA-1型大孔树脂对齐墩果酸具有较好的吸附和解吸效果，最佳纯化工艺条件为上柱液浓度0.794 mg/mL，吸附流速0.5 mL/min；以90%浓度乙醇洗脱，洗脱流速1.0 mL/min，纯化后得提取物中齐墩果酸纯度可达26.55%。

In the study of extraction of antimicrobial substance from Eleocharis tuberose peel with ultrasonic, on the basis of single factors test and orthogonal test, the optimal technological parameters were material 60 mesh, ethanol 65%,1:10 for ratio of material to liquid, 45min for ultrasonic time, extraction for one time.

超声波法提取荸荠皮中抑菌物质的实验中，通过单因素及正交实验确定的最佳工艺条件为：采用60目的荸荠皮粉碎物、浓度65％的乙醇溶液、料液比1∶10、超声波作用45min、提取次数一次，在此条件下提取物对大肠杆菌和金黄色葡萄球菌的抑菌圈直径分别为13.3mm和14.3mm。

The theory, experiments and applications are in the explorative stage because of its short developing history.

超声波非接触驱动是超声波驱动的一个新的研究领域，其研究始于九十年代初。

Effects of solvent species, ethanol concentration, microwave power, extraction time, ratio of material to liquid and ultrasound wave on extraction rate of gingerol were investigated through single factor and orthogonal test.

以生姜粉为材料，通过单因素和正交试验探讨超声波－微波协同萃取姜辣素的工艺条件中溶剂种类、乙醇浓度、微波功率、微波处理时间、料液比及超声波等因素对萃取效果的影响。

These ultrasounds do not take the place of the diagnostic ultrasound the OB/GYN performs in their office between seventeen and twenty weeks and elective ultrasounds are typically not covered by medical insurance.

这些超声波不采取地方的超声诊断露天焚烧/ gyn表现在他们的办公室之间的17和二十零周和选修超声波通常未涵盖的医疗保险。

The acceleration of ultrasonic to enzymatic hydrolytic process of cellulose was obvious.

超声波场对纤维素的酶水解过程有明显的加速作用，通过研究发现在超声波能量为0-54mW／mL的范围内速度呈直线上升趋势。

This one mode pays close attention to network credence foundation of the businessman very much.

这一模式非常关注商人的网络信用基础。

Cell morphology of bacterial ghost of Pasteurella multocida was observed by scanning electron microscopy and inactivation ratio was estimated by CFU analysi.

扫描电镜观察多杀性巴氏杆菌细菌幽灵和菌落形成单位评价遗传灭活率。