超声辐射提高亚心形扁藻脂肪酸不饱和度研究

本文设计了一个超声频率、超声功率和辐射时间三因素四水平的正交实验，研究超声辐射对亚心形扁藻(Platymonassubcordiformis)的生物学效应.结果表明，在适宜超声频率条件下，采用低功率、短时间超声辐照可以提高亚心形扁藻生长速率和脂肪酸不饱和度及主要不饱和脂肪酸的百分含量.方差分析表明，在正交实验所确定的最佳超声条件下，亚心形扁藻的生长速率有明显提高，为对照组的1.99～2.33倍；其脂肪酸不饱和度可达78.8％～80.9％，与对照组相比可提高3.5％～5.6％；C164百分含量可达16.2％～19.0％，比对照组提高了3.4％～6.2％；C183百分含量可达39.2％～40.8％，比对照组提高了1.9％～3.5％.

Effect of ultrasonic radiation on unsaturation degree of fatty acids of P/atymonas subcordiformis

In this study, a three-factor and four-level orthogonal experiment was designed to study the effect of ultrasonic radiation on Platymonas subcordiformis. The experiment results revealed that under the radiation of the optimum ultrasonic conditions. the growth rates of P. subcordiformis were enhanced obviously, the growth rate of P. subcordiformis could be 1.99～2.33times of the controlled. The percentage of TUFA and individual major fatty acid raised obviously too, the percentage of TUFA of P. subcordiformis could be 78.8％～80.9%, 3.50%～5.60%more than that of the controlled , the percentage of C16:4 could be 16.2%～19.0%, 3.4%～6.2% more than that of the controlled, the percentage of C18: 3 could be 39.2% ～ 40.8%,1.9%～3.5%more than that of the controlled.