甚高频/超高频范围内葡聚糖水溶液声学特性的测量。

Measurements of acoustic properties of aqueous dextran solutions in the VHF/UHF range.

作者信息

Akashi N, Kushibiki J I, Dunn F

机构信息

Department of Electrical Engineering, Ichinoseki National College of Technology, Japan.

出版信息

Ultrasonics. 2000 Sep;38(9):915-9. doi: 10.1016/s0041-624x(00)00015-9.

DOI:10.1016/s0041-624x(00)00015-9

PMID:11012014

Abstract

The acoustic properties of aqueous solutions of dextran are characterized in the frequency range of 70-400 MHz by the bio-ultrasonic spectroscopy system using an ultrasonic transmission comparison method. The attenuation, velocity, impedance, and density of aqueous dextran solutions, for six molecular weights in the range of 10,400-2,000,000 Da in the concentration range 520% by weight, are reported. All four parameters increase with increasing concentration. As the molecular weight increases, the attenuation coefficient increases and the velocity decreases. The precise frequency and molecular weight dependences of the acoustic properties of the solutions are readily determined by the system.

摘要

使用超声透射比较法，通过生物超声光谱系统在70 - 400 MHz频率范围内对葡聚糖水溶液的声学特性进行了表征。报道了浓度范围为5%-20%（重量）、分子量在10400 - 2000000 Da范围内的六种葡聚糖水溶液的衰减、速度、阻抗和密度。所有这四个参数均随浓度增加而增大。随着分子量的增加，衰减系数增大而速度减小。该系统能够轻松确定溶液声学特性与频率和分子量的确切依赖关系。