negative control造句怎么写

From 31 days all rats were sensitized and chanllenged to induce asthma with OVA but in negative control group using N.

On the negative control sections, almost all cells were semitransparent, and without coloration , and the background of slices almost had no color.

Compared with negative control group, the doubling time of both positive control group and experimental groups was prolonged.

The repressor is essentially a negative control mechanism.

Methods 78 cases suffering from acute and chronic viral hepatitis were treated with Xiongdan Jiaonang; 23 cases of hepatitis as negative control, were treated with Fufang Yiganling.