暴露时间

复合污染方差分析表明：暴露时间对所有酶活性的影响均呈极显著性差异（P0.01）；且在所有酶活性上，暴露时间对总变异的贡献均为最大。

The analysis of variance for combined pollution showed that exposed time highly significantly effected the activity of antioxidative enzymes ( P0.01 ) .

各提取液的半致死浓度（LC50）随着藤壶无节幼体在各提取液中的暴露时间的延长越来越低，但下降幅度存在一定差异性。

With the prolonging of exposed time , LC50 of the extracts were getting lower and lower , but changing ranges were different .

引起暂时性阈移的最少噪声暴露时间是在3d之内；

The shortest exposure to noise that induced TTS is within three days ;

随着有氧暴露时间的延长，各组的pH值均有升高。

With the extension of aerobic exposure time , the pH value of each group increased .

平均X线暴露时间（26±12）min。

The average X ray exposure time was ( 26 ± 12 ) min.

各处理组CAT活性随暴露时间延长先升高后降低。

CAT activities in e treatment groups first increased and then decrease with the exposure time prolonged .

在标准转染条件下，增加DNA用量和延长细胞暴露时间反而使转染效率下降。

Under standard transfection conditions , increasing DNA amount and exposure time of the DNA-liposome complexes with cells resulted in decreased transgene expression .

随着暴露时间延长，这种兴奋效应逐渐消失，血细胞数和SOD活性均逐渐下降。

With time elapsed , the intoxication phenomenon was diminished and THC and SOD activity gradually decreased .

应用~（36）Cl积累方法测定岩石表面暴露时间及岩石侵蚀速度

Measuring the surface exposure time and the erosive speed of the rocks with chlorine-3 6

复合污染结果表明：蚯蚓MT含量与浓度的组合和暴露时间密切相关。

The combined pollution indicated that MT content was related to the various treatments and the exposure time .

结果：高氧组TGF-β1的mRNA水平从第3天开始升高，随暴露时间延长逐渐上升，到第14天仍持续不降；

Results : The level of TGF - β 1mRNA in hyperoxia group increased from the 3rd day , and rose gradually until the 14th day .

应用宇宙成因核素~（10）Be和~（26）Al估算剥蚀面的暴露时间及剥蚀速率和剥蚀厚度

Estimation of exposure time and erosion rate as well as thickness of erosion surface using cosmogenic nuclides ~ ( 10 ) Be and ~ ( 26 ) Al

方法选用人淋巴细胞及小鼠脾脏细胞进行研究。暴露时间为1h。

Methods Isolated human peripheral blood lymphocytes and mouse spleen cells were exposed to the tested substances for 1h respectively .

随着暴露时间的增加，NH3-N从沉积物向上覆水体释放通量减小。

The flux of ammonium to the overlying water reduced with the increased time of emersion .

在相同暴露时间内，同一H2O2浓度下DNA损伤从尾长、尾距、Olive尾距上保持一致。

At the same time of exposure , two methods showed that DNA damage about tail length , tail moment and olive tail moment , was basically consistent .

内锈层中有高含量的FeS，并随暴露时间的延长而增加。

Content of FeS in internal rust layer is high , and it increased with the increase of exposure time .

EEL代表了一个既考虑了暴露时间又考虑了暴露发生时的浓度的累积的暴露极限。

The EEL represents a cumulative exposure limit taking into account both the time of exposure and the concentration at which the exposure occurs .

对74例内镜诊断的食管炎与pH检测进一步分析显示食管酸暴露时间越长，内镜下炎症程度及症状越重。

Further study on the relationship of symptomes , endoscopic appearance and pH value in 74 esophagitis showed that the longer the acid exposure time of esophageal mucosa , the severer the symptom and the endoscopic inflammatory change .

用a（rms）评价人体振动需要知道按三分之一倍频带给出的振动加速度和暴露时间。

It is necessary to know vibration levels in 1 / 3 octave bands and exposure time in evaluating human vibration when a ( rms ) is used .

彗星试验结果表明重金属污染土壤对蚯蚓产生明显的遗传毒性，并观察到随着暴露时间延长，蚯蚓体内产生DNA修复机制，提示彗星试验是检测土壤基因毒性的有效手段。

The results of the comet assay demonstrated the genotoxicity of metal contaminated soils . And a DNA repair process in earthworm was observed as the exposure time prolonged . And the comet assay is capable of examining the genotoxicity of soils .

实验结果表明，随着重金属离子暴露时间的延长，中华哲水蚤T-SOD活性变化显著。

The results showed that the SOD activity changed markedly with prolonged exposure of these ions .

结果表明，雄性泥鳅血清Vtg含量随BPA暴露时间和暴露浓度的增加而显著增加。

The results showed that the Vtg concentration in male loach serum were significantly increased with the increase of exposure time and dose .

结果GERD组食管酸暴露时间（pH<4）较对照组显著增加（P<0.05）；

Results The time of esophageal acid exposure ( pH < 4 ) for GERD was significantly greater than that of controls ( P < 0.05 ) .

Hg2+和pb2+对中华哲水蚤T-SOD活性的影响均表现为随暴露时间延长，呈先上升后下降的趋势。

Effects of Hg2 + and Pb2 + on the SOD activity were increased first and then decreased during prolonging the exposure time .

使用高功率8mm波源，实验观察了在平均功率密度p0≈3.5W/cm2，不同暴露时间、不同暴露部位条件下，对小鼠和大鼠的致伤和致死情况。

Under different conditions of exposure ( different duration and different sites ), damage and deadly effects of 8 mm High Power Millimeter Wave ( HPMMW ) on mice and rats were observed .

在寡肽载体介导转染的过程中，溶酶体抑制剂氯喹起着不可或缺的作用，而且在氯喹溶液中的暴露时间至少应维持在8h以上；

During the course of gene transfection mediated by the oligopeptide vector , it was found that chloroquine was essential and the time exposure to chloroquine should be maintained for at least 8 h.

在下体负压（LBNP）作用时，同步记录心电图、心率、血压、脑血流量、负压暴露时间。

Electrocardiogram ( ECG ), heart rate ( HR ), blood pressure ( BP ), cerebral blood flow ( CBF ) and time of exposure were monitored during LBNP .

方法平原体检正常者进入海拔5000m高原（1~3）月期间，在高原暴露时间、劳动强度及生活条件相同的施工群体中随机抽样127人。

Methods One hundred twenty-seven workers received healthy check-up before entering high altitude and worked at this circumstances ( 5 000 m above sea level ) for 1-3 months .

GERD时，卧位pH4百分时间大于立位，提示夜间酸反流造成食管粘膜酸暴露时间明显延长，促发炎性损伤。

For the patients with GERD , supine fraction time pH4 was higher than upright one , which might indicate that night reflux induced longer esophageal acid exposure and esophageal mucosal inflammation .

结果表明Cd2+亚慢性胁迫作用初期肝脏通过加强GSH合成和周转代谢抵御Cd2+的毒害作用，但随着暴露时间延长，这种反应逐渐丧失。

These results indicated that sub-chronic exposure to waterborne Cd2 + affect the hepatic GSH metabolism . During the initial period , the synthesis and turnover were strengthened to deal with the stress while the response ability weakened for a longer exposure .