查询词典 threshold exposure

Results Risk for lung cancer caused by exposure to nitrosoamine increased significantly after adjustment of nonoccupational risk factors (RR=271,with 95% CI of 132 to 557),with a significant doseresponse relationship between exposure to nitrosoamine and lung cancer.

结论（1）本文数据提示病例－队列分析因标准误较小、抽样更简便而优于巢式病例－对照研究方法；（2）亚硝胺暴露与肺癌之间有较确定的关系，但受到吸烟和经济状况等因素作用的修饰，需进一步研究

Cumulative noise exposure was calculated according to noise intensity and working age. Testof Audio acuity was carried out for 931 noise exposure workers,who are with non - otopathy.

用HS6288 系列噪声分析仪监测作业场所噪声强度，并进行频谱分析，计算累积噪声暴露量；对某纺织厂接触噪声作业的无耳疾患的931人进行听力检测；用EpiData 建立数据库，SAS 软件8.0 统计包进行统计分析。

Methods : The noise intensity and spect ral analysis were monitored with HS6288 noise inspector.Cumulative noise exposure was calculated according to noise intensity and working age. Testof Audio acuity was carried out for 931 noise exposure workers,who are with non - otopathy.

用HS6288 系列噪声分析仪监测作业场所噪声强度，并进行频谱分析，计算累积噪声暴露量；对某纺织厂接触噪声作业的无耳疾患的931人进行听力检测；用EpiData 建立数据库，SAS 软件8.0 统计包进行统计分析。

Gz exposure might produce ischema-reperfusion effect on rat brain and the function of repeated +Gz exposure was similar to that of ischemia prestimulation.

Gz暴露可对大鼠脑产生类似缺血再灌注的作用（Glaister，1988），反复+Gz暴露可对大鼠脑产生类似缺血预刺激的作用。

This experiment aimed to systematically investigate and analyze the ethanol activated rates of mouse oocytes, affected factors of oocytes activation, types and development of parthenotes, and the organization and roles of the cytoskeleton during pronuclear formation and migration and early embryo cleavage by ethanol activation of oocytes, embryo culture in vitro and immunofluorescence cyto-chemistry. The results:(1) The ethanol activation of mouse oocytes showed that the activated and developmental rates of oocytes increased significantly with the increase of ethanol concentration and extension of exposure time, but over concentration and exposure time would result in increased fragment rates significantly. 7% ethanol treated oocytes for 7min was the optimum activated condition.

本实验主要利用卵母细胞的乙醇激活、胚胎体外培养和免疫荧光细胞化学方法对小鼠卵母细胞乙醇激活效率、影响因素、孤雌胚类型、发育、原核形成、迁移及早期胚胎卵裂过程中细胞骨架的组装、作用等进行了系统的研究和分析，结果显示：(1)小鼠卵母细胞的乙醇激活结果表明，随着乙醇浓度的升高和作用时间的延长，卵母细胞激活率和发育率都显著提高，但乙醇浓度过高和作用时间过长会导致卵母细胞碎裂率的显著增加，7%乙醇作用卵母细胞7min 为最佳激活条件。

Exposure of naive CD4〓T lymphocytes to superantigen induces a strong proliferative response. Prolonged exposure or subsequent restimulation of the responding CD4〓T cell population with superantigen leads to the apoptotic events of activation-induced cell death.

幼稚的〓细胞暴露于超抗原可诱导强烈的增殖反应，继续延长暴露或再次刺激应答〓细胞可导致活化诱导的细胞死亡。

Within the drum rotation rotary record images on a single chip, support in the exposure of the rollers in the supratrochlear, driven by a synchronous motor, because it is located in the center of the drum, with sencitivity keeping distance rotate and move back and forth exactly isolinetic (exposure drum and sencitivity stay), thus making a reflection of the laser beam can be uniform, equally spaced and vertically onto photographic materials on the geometry of always the same.

在滚筒边回旋扭不停纪录图像的回旋扭不停镜上一个单片不屈射镜，支承在曝平滚筒边的滑车上，由同步电机带不静，因它位于滚筒的洋心，跟感平质料保留同样间隔回旋扭不停和不小略不天等速后后移不静（曝平滚筒和感平质料变不静不不静），不新不屈射的激平束能平均，等间隔和垂屈不天不屈射到感平质料上，纪录的几何图形老是不同。

The basic principle is that for exposure changing the transmissivity τ is equal to changing the exposure time t .

利用改变曝光时间t和改变透射率τ对曝光量的改变是完全等价的这一原理，不用借助任何标准密度灰片校准，可在大面积上足够精准地测量物体透射密度

This study has achieved the following purposes,observed effects of different levels of noise exposure on the auditory function and the hearing organ of guinea pigs,explored optimal noise exposure profiles for research of NIHL susceptibility,established NIHL susceptibility model,148 differentially expressed genes of cochlea between NIHL susceptible and unsusceptible guinea pigs were screened by using suppression subtractive hybridization.The results of bioinformatics analysis showed that there are 34 sequences whose homology were larger than 80% and match sequence larger than 100 bp.

本研究观察了不同噪声暴露量对豚鼠听觉功能和听觉器官结构的影响，探讨了NIHL易感性研究的最佳噪声暴露方案，建立了NIHL易感豚鼠模型，利用抑制性消减杂交技术筛选NIHL易感与不易感豚鼠耳蜗的差异表达基因片段148条，生物信息学结果显示同源性大于80%且匹配碱基大于100 bp的片段共34条。

In the simulated experiments, the effects of long-term exposure of dibutyl phthalate on contents of malondialdehyde, solubility carbohydrate, blade pigment, protein, glutathione and amino acid of Vallisneria spiralis L were studied. The cultivation period was 25 days. The effects on the growth of Vallisneria spiralis L under the stress of DBP was also invertigated in this paper. Vallisneria spiralis L was damaged seriously in long-term exposure of high concentration DBP.

以沉水植物苦草为试验材料，通过模拟实验研究了邻苯二甲酸二丁酯长期暴露对苦草的生长状况以及丙二醛、可溶性糖、叶绿素、谷胱甘肽、蛋白质和氨基酸的含量等生理生化指标的影响，试验结果表明：高浓度DBP长期暴露对苦草生长有严重伤害，DBP对苦草丙二醛和可溶性糖含量以及叶片中叶绿素含量的影响比较相似，都有一定的起伏。

I want to be a big fish in a small pond.

我要做一条在小池塘里的大鱼。

While the software functioned well, we did not feel the same about their customer support!

虽然该软件运行良好，我们没有同样的感觉他们的客户支持！