1) ultrasonic vibration method
超声提取方法
2) ultrasonic extraction
超声提取法
1.
To explore a rapid and efficient extracting method of total flavonoids and polysaccharides from Lycium barbarum L,the contents of total flavonoids and polysaccharides were served as index comparing ultrasonic extraction with traditional extraction,and the contents were determined by spectrophotometry.
这是首次将超声提取法用于宁夏枸杞总黄酮及多糖的提取,与传统提取法相比,超声提取法具有快速、高效等显著优点。
2.
Methods:Macroporous resin water extraction method,water extract-alcohol precipitation and ultrasonic extraction were used to extract polysaccharide,respectively,comparing the three extraction technologies for the extraction rate of Astragalus polysaccharide,and the astragalus polysaccharide content was calculated by using spectrophotometry.
方法:分别用水提取大孔树脂分离法、水提醇沉法、超声提取法提取多糖,比较三种工艺提取黄芪多糖提取率,并采用分光光度法测定黄芪多糖含量。
3) Ultrasonic extraction method
超声提取法
1.
Methods: The volatile components extracted from Chinese Propolis by Soxhlet extraction method, Ultrasonic extraction method, Infusion extraction method and Steam-distilled extraction were comparatively analyzed by GC-MS.
方法:采用GC-MS分别对乙醚索氏提取法、乙醚超声提取法、乙醚冷浸法和水蒸气蒸馏法提取蜂胶所得提取物的化学成分进行分析比较。
5) ultrasonic extraction technology
超声波提取法
1.
Orthogonal design method and ultrasonic extraction technology were used for studying the effect of alcohol concentration, rate of solid to solution, ultrasonic time and times.
方法以儿茶素的提取含量为评价指标,采用超声波提取法,通过正交试验研究不同浓度乙醇、提取次数、提取时间、料液比4个因素对儿茶素提取的影响,并筛选出最佳提取条件;用高效液相色谱法测定含量,以甲醇-水-乙酸(25∶74。
6) ultrasonic extraction
超声波提取法
1.
Conclusion For extracting naringin,the ultrasonic extraction method is superior to the Soxhlet extraction method,which is collected in the Chinese Pharmacopoeia with more convenience and time saving.
目的比较索氏提取法与超声波提取法提取化橘红中柚皮苷的效果。
补充资料：超声场测定方法
超声场测定方法
measurement methods for ultrasonic field
超声场测定方法的肋川c 6eld)(~u块”犯nt右刀又与书2。姗th叼sfor日-t的空间。不同的超声振动源以及不同的传播条件将形成不同的超声能量的分布空间，即不同的超声场。根据惠更斯原理，探头发射面上的每一点都应看成是一点状声源，它们各自发射的球面子波在声场中相遇时将发生干涉，结果使声场内声压或声强变化剧烈，起伏不均，甚至在某些空间点上声压为零，而另外一些空间部位的声压则呈极大值。远场呈现出放射状，并逐渐过渡到球面波。 声场测量方法如下:首先安装好被测超声探头和水听器，定位装里可使水听器沿3个正交轴在水槽声压┌─────┬─┬─┐├丝──┐ │…│{ ││_八 │ │ │ │└┬──┼─┼─┴─┘ │.、 │. │ │ │\ │ └──┴─┘ 声脉冲幅度测t原理图内移动，并可绕:、y轴转动。利用定位装里调节水听器，在被测探头的辐射声场中找到声压最大值，其声脉冲波形如图所示。该信号经放大后输人到信号处理设备，求出脉冲声压平方积分P;和脉冲宽度‘d。t‘为瞬时声压平方对时间积分值达到其终值(即P。)之1崛的时刻t0:，‘与达到该终值之以跳时刻气，，.之间的时间间隔的1.25倍。参见超声声强可求得: 尸，__P偏“两和‘，“砂式中:I，为空间峰值脉冲平均声强，I，为空间峰值时间平均声强，p为介质密度，。为声速，T为声脉冲重复周期。(熊大莲)
说明：补充资料仅用于学习参考，请勿用于其它任何用途。
参考词条