An ultrasonic study of the thermotropic transition of dipalmitoyl phosphatidylcholine.
An ultrasonic study of the thermotropic transition of dipalmitoyl phosphatidylcholine.
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二棕榈酰磷脂酰胆碱热致转变的超声研究。
DOI：
10.1016/0005-2736(79)90189-5
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发表时间：
1979
期刊：
影响因子：
--
通讯作者：
R. D. White
中科院分区：
文献类型：
--
作者：
J. Harkness;R. D. White
已研究了二棕榈酰磷脂酰胆碱的超声处理和未超声处理悬浮液的声吸收与温度在 0.6 至 4.0 MHz 频率之间的函数。固定频率下的吸收达到最大值的温度取决于样品制备和历史记录，并且在一定程度上取决于观察频率，超声处理的囊泡表现出的最大吸收温度比未超声处理的分散体低 2–3°C。固定频率下吸收的温度依赖性表明了协同过程，而固定温度下吸收的频率依赖性表明需要多个弛豫时间来描述声吸收。
The acoustic absorption of sonicated and unsonicated suspensions of dipalmitoyl phosphatidylcholine has been studied as a function of temperature at frequencies between 0.6 and 4.0 MHz. The absorption at a fixed frequency passes through a maximum at a temperature which is dependent on the sample preparation and history and somewhat dependent on the frequency of observation, with sonicated vesicles exhibiting a temperature of maximum absorption 2–3°C below that found for unsonicated dispersions. The temperature dependence of the absorption at fixed frequency suggests a cooperative process while the frequency dependence of the absorption at fixed temperature indicates that more than a single relaxation time is required to describe the acoustic absorption.