Conclusions The truncation of C gene could improve the encapsulation efficiency of HBV vectors with no effect on the replication and expression of the intact HBV vectors .
结论C基因部分截短不影响HBV载体外源基因的表达和病毒的复制，而且可以提高载体的包装效率。
The influence degree of the truncation on the thrust coefficient efficiency falls down by increasing the ratio.The performance loss is more due to selecting too small value of the truncation ratio .
随着截短率增大，截短率对效率的影响程度逐渐降低。截短率太小，性能损失较大；
To discuss the performance effects of plug truncation ratios , cold-flow tests were performed for80 % , 40 % , 30 % and20 % truncated aerospike nozzles by employing cold air as propellant .
This paper first extends “ sub ” operations of matroids ( truncation , elongation , restriction and contraction ) to poset matroids by dint of the poset theory and gives the concept of poset matroid connection for the first time .
