Separate negative control group, positive control group.

另设阴性对照组、阳性对照组。

Perform a growth promotion test as a positive control.

进行一个生长促进试验作为阳性对照.

Positive Control: PMA stimulated human peripheral blood mononuclear cells.

阳性对照: PMA刺激的外周血单核细胞.

The injury protectived control group A had lower MST, Ep, PFC, TFL than positive control group.

损伤保护组A较阳性对照组MST 、 EP 、 PFC 、 TFL降低,有显著性差〔己J少十.

Methods Weakly positive anti-HIV quality control reference was prepared by diluting the positive control of domestic reagent with normal negative serum, and mapped quality control chart.

方法用人类免疫缺陷病毒（HIV）抗体阴性血清稀释阳性对照的方法，经过国产试剂检测，制备出弱阳性标本的质控参考品，并绘制质控图。

Positive Control Germinal center in a tonsil or a reactive lymph node.

阳性对照:扁桃体发生中心或反应淋巴小结.

There was no significant difference between experimental group and positive control group (P>0.05).

而实验组与阳性对照组比较，均无明显差异，P>0.05。

The propulsive function of small intestine in the large dosage group and the positive control group was no statistical significant(P>0.05).

高剂量组对小肠的促动力效应与阳性对照西沙比利组比较无显著性差异（P>0.05）。

Lever and Spring provides more positive control in closing the disc.

杠杆和弹簧在关闭阀瓣时可进行更加积极主动的控制.

Accurately cut threads engage the yoke sleeve for positive control of disc position.

轭架套管准确的螺纹连接有助于阀瓣位置的调整控制.