阴性对照

另选该厂同样条件非氟作业工人20人为阴性对照C组。

In addition , group C of 20 workers unexposed to fluoried were selected from the same factory and served as negative control .

结果：不同浓度壳聚糖组与阴性对照组相比，其发光信号值均无显著差异（P＞0.05）；

Results : Compared with the negative control group , the value of the luminescence signal of different concentrations chitosan treatment group showed no significant difference ( P > 0.05 );

经统计学分析，注射组与阴性对照组无显著性差异（p＞0.05）。

There was no significant difference by the statistical analysis ( p0.05 ) .

15例无肌炎的患者（阴性对照组）MRI上均正常；

However , 15 controls had normal manifestations on MRI .

实验另外设置有RNA阴性对照。

In this experiment , another RNA-negative group was set up as the control group .

方法通过开腹瘤块包埋法建立兔肝VX2肿瘤模型，将荷瘤兔随机分为A、B、C、D、E五个治疗组和注射用大豆油阴性对照组。

Methods Rabbits with VX_2 liver tumor were divided into five treatment groups and control group .

结果：阳性对照组子宫脏器系数及血清雌二醇水平均高于阴性对照组（P均<0.05）。

Results : The uterine organ coefficient and concentration of estradiol in blood serum were higher than those of positive control group ( P < 0.05 ) .

结果表明，阿特拉津高剂量组（438mg／kg）的小鼠精子畸形率明显增高，与阴性对照组比较差异显著（P＜0－05），但未见剂量－反应关系。

The results showed that the rate of sperm deformity increased significantly in high dosage group , however , no dose response relationship was seen .

FCM法测定细胞角蛋白表达，实验组比空白及阴性对照组阳性率显著降低（P＜0.05）；

The FCM method test showed that the keratin positive rate of experiment group cells significantly decreased ( P < 0.05 ) .

PBS代替一抗作为阴性对照。

PBS instead of primary antibody as negative control .

试验组动物及阴性对照组动物生长率无明显差异（P0.05）。

The growth rate of the animals also has no significantly differences between experimental group and negative control group ( P 0.05 ) .

Ames试验MR＜2，显性致死试验、致突变指数与阴性对照组比较无显著差异（P＞0.05）均显示阴性反应。

Results also showed negative response , both in Ames test ( MR < 2 ) and in dominant-lethal test ( P > 0.05 ) .

PCP组的BALF中淋巴细胞比例比PC阴性对照组明显升高。

The lymphocyte proportion in the BALF was significantly higher in PCP group than in PC negative group .

Bax蛋白表达：模型组大鼠肾皮质Bax蛋白表达明显高于阴性对照组（P0.05），预防组各组表达低于模型组（P0.05）。

Bax : The expression of Bax protein in model group is higher than that of negative control group ( P0.05 ) .

各剂量组动物肝、肾器官脏器系数与阴性对照组比较，无统计学意义差异（P0.05）。

Each dose group animals , liver , kidney organ coefficient with the negative control group , no statistically significant difference ( P 0.05 ) .

方法大鼠BMSCs在与生长板软骨细胞进行间接共培养，并设阴性对照。

Methods BMSCs and physeal plate chondrocytes were co-cultured indirectly . The negative control was set up .

阴性对照组和正常对照组ig等体积1.25%的西黄蓍胶溶液。

The normal control group and the negative control group received 1.25 % west gum tragacanth .

阴性对照组的D-dimer水平明显升高，差异有统计学意义（p0.01）。

Compared with blank group , the level of D-dimer in negative control group increased significantly ( p0.01 ) .

以正常ESC作为阴性对照。

The cells derived from normal ESC were used as a negative control .

方法将断乳的Wistar大鼠随机分为3组：转基因大米组（T）、非转基因大米组（N）和阴性对照组（C）。

Methods Weanling Wistar rats were randomly divided into three groups : T , N and C group . The diet of T group contained 78.3 % transgenic rice .

四甲基偶氮唑盐（MTT）比色法检测，阴性对照组与材料组的毒性级分别为0级和Ⅰ级，差异无统计学意义（P＞0.05）。

The MTT color experiments showed no statistic significance between materials group and negative group , with the toxicity at level ⅰ and 0 ( P < 0.05 ) .

且阳性对照组、低、中干预组与阴性对照组小鼠相比较差异有统计学意义（P0.05）。

And the positive control group , low , negative in the intervention group and the control group of mice had a significant difference ( P0.05 ) .

对禽骨髓细胞瘤病显性型病鸡、ELISA阳性的隐性型病鸡和阴性对照鸡进行了病理学研究。

Pathological study was carried out on myelocytomatosis of diseased chickens of naturally infected and dominant type , concealed type of ELISA positive and negative control group respectively .

蒙药娜仁满都拉-11治疗组动物IL-4水平显著低于阴性对照组，而IFN-γmRNA水平显著高于阴性对照组。

IL - 4 is lower in treatment group than in negative control group , while IFN - γ mRNA is higher than in control group .

[结果]在细胞毒性实验中，实验组的MTT值在各个时间段与阴性对照组均无显著性差异（P>0.05）。

[ Results ] The MTT values in test groups and negative groups were not significantly different at different times ( P > 0.05 ) .

FCM法测定细胞周期，实验组S期细胞比空白组及阴性对照组显著增高，S期细胞达349%；

FCM method test the cell cycle results show that , cells on S phase is 34 9 % in the treatment group ;

阴性对照组（NC）喂基础饲料及自来水；其余4组喂基础饲料及高氟水。

The control group ( NC ) was fed with staple feed stuff and tap water , the other four groups were fed with staple feed stuff and high fluorine water .

免疫组化显示干预组肝脏肿瘤细胞MMP-2表达较阴性对照组下调（P<0.05）；

The expression of MMP-2 in hepatocellular carcinoma of interfered groups was gradually increased than that in control group ( P < 0.05 );

以未进行遗传转化的植株作为阴性对照，以质粒DNA为阳性对照，扩增NPT-Ⅱ、GUS基因部分片段。对转化后具有卡那霉素抗性的植株进行PCR检测。

The kanamycin resistant plant were performed PCR examination with non-transformed plants as negative control and plasmid DNA as positive control , amplification NPT - ⅱ、 GUS gene part fragment .

统计学处理结果金属材料组及阴性对照组与阳性对照组之间的光度值的差异均有统计学意义（P0.05或P0.01）。

The results of statistical analysis : There were a significant difference in the optical densities between metal material groups or the negative control ( P0.05 or P0.01 ) .