查询词典 threshold exposure

Frederick vom Saal of the University of Missouri has investigated the impact of early exposure to this compound. His work on laboratory animals showed that fetal exposure to bisphenol-A led to obesity and cancer.

密苏里大学的 Frederick vom Saal 调查了胎儿时期接触此物质的影响，对实验室动物的研究发现，胎儿接触双酚-A 可引发肥胖症和癌症。

At present, more screen varieties, the product is not uniform, but it is important to clear the screen mesh size and diameter determines screen of perforated and whee thickness, at the same time, influenced by the online photographic emulsions, hosting the content, obviously, perforated, the screen can be primary processing rough coated photographic emulsions in respect of this exposure time should also be the longer exposure time otherwise.

纲后，丝网品栽较众，产物参不差不齐，但有一点务必不合明，丝网的纲数与丝径不决着丝网的开孔率和网布薄度，同时，又感化着感平乳剂的网上驻留度，较着，开孔率不小、丝线不细的丝网可涂布的感平乳剂不离薄，所以曝平工夫也答相答加长，反之则曝平工夫缩长。

The exposure dose from various nuclide through eachpathway to the population surrounding the nuclear power plant whichwas assumed to be in an accident was calculated by statistic calculationmethod using practical meteorological data.The relationship betweenradioactive release and exposure dose was obtaine,dwhich is independentof the accidential process and the meteorological condition.

本文借助于核电站假想事故条件下的放射性释放量，按不同的核素组，分组计算了其经各种照射途径对周围居民造成的剂量；并考虑了气象资料的统计数据，使得因天气条件两低估剂量的可能不超过5%；从而得到了与事故过程和天气条件无关的释放量和照射剂量间的关系。

Results There was a downtrend in weight of dams on GD20 as the DBTD exposure dose increased. The weight of dam's utero significantly decreased in 30 mg/kg group. A significant decrease in fetal weights was observed in all DBTD groups, and fetal sizes in 20, 30 mg/kg groups. Exposure to DBTD from GD 12-19 resulted in a distinct increase in normalized anogenital distances in female fetuses, but no effects were seen in male ones.

结果 妊娠20d时，孕鼠体重随DBTD剂量升高呈下降趋势，但与对照组比较，差异无统计学意义，30mg/kg组孕鼠子宫重量显著降低；所有DBTD染毒组雄性、雌性胎鼠体重均显著降低，20、30m/kg组胎鼠体长显著降低；所有DBTB染毒组雌性胎鼠肛门距生殖器的标化距离显著增长，而雄性胎鼠无显著变化。

The effects of doping concentration of iodine, doping time, doping temperature and exposure time on volume resistivity of anthracite were studied; and also the effects of solution concentration of cupric chloride, doping time, doping temperature, soking time of cupric chloride and exposure time on the volume resistivity were studied; Anthracitic resistivity has been decreased in dissimilar extent, and furthermore ,volume resistivity stability of the doping anthracite made by liquid phase doping method is more better than gas phase mothed; Resistivity and its stability were better than the doping method of iodine in fused salt doping method of cupric chloride.

研究了I_2掺杂浓度、掺杂时间、掺杂温度和暴空时间对无烟煤电阻率的影响；探讨了CuCl_2溶液的浓度、掺杂时间、掺杂温度和CuCl_2溶液浸泡放置时间以及暴空时间对无烟煤电阻率的影响：结果发现：I_2气相掺杂和液相掺杂均使无烟煤的电阻率有不同程度的降低，而液相掺杂法所得材料的电阻率稳定性更高；CuCl_2熔盐掺杂法所得材料的电阻率及其稳定性均优于I_2掺杂法。

At 4th week, the percentages of Clara cells over bronchiolar epithelial cells were similar between groups. At 24th week, the percentages of Clara cells were reduced in mice exposed to TCDD, NNK, CSC, or TCDD+CSC exposure, but not in mice exposed to TCDD+1 mg NNK. Thus, these findings suggested that TCDD, NNK, CSC, or TCDD+CSC exposure injuried Clara cells to lose CCSP protein in mice lung.

在A/J mice 4周实验组中，TCDD或NNK各实验组Clara cell的数目(26.6%-34.3%)与控制组(34.2%)比较，并没有明显的差异；反观A/J mice 24周实验组中，除了TCDD+NNK (1 mg)实验组外，其他各实验组Clara cell的数目与控制组(55.9%)比较明显下降11.7%-41.4%，显示暴露NNK、TCDD、CSC或TCDD+CSC皆会伤害Clara cell，暗示Clara cell对这些环境毒物比其他呼吸道上皮细胞敏感。

Recently, several controlled human studies have shown that the combination of exercise and pollutant exposure (SO2 or O3) caused a marked bronchoconstriction and reduced ventilatory flow when compared to pollution exposure at test.

最近，几个控制人类的研究显示：运动和污染物曝露(SO2或O3 )的结合，导致有名的甲状腺肿，当与测验中的污染曝露比较时，减少了通风的流动。

The sizes of the exposure before sigmoid sinus, below temporal lobe and the angles of exposure to the clival pit were measured.

位于岩斜区的各种病变由于手术暴露极为困难，长期以来一直是神经外科领域的&地雷区&。

The concentration of Cosmogenic nuclides is not only constrained by production rates and exposure time, and also closely related to surface erosion. Furthermore, the concentration is affected by geomagnetic intensity, shielding, chemical weathering, and sample geometry as well. These factors affecting Cosmogenic nuclide concentration should be calibrated when surface exposure age is calculated.

地表物质中宇宙成因核素浓度除了受到核素生成速率和地表物质的暴露时间制约外，还与地表侵蚀速率密切相关，此外，地磁场强度、遮蔽、化学风化及样品的几何位置等也会对核素浓度产生一定影响，在求算样品的地表暴露年代时，应对这些因素进行相应的校正。

First, we found that after exposure to 60℃ for 5 and 30 min ,culturable L. pneumophila concentration reduced 4 and 6 log CFU/mL, and the loss of cell membrane integrity was 56 % and 83 %, respectively. However, the total concentration was not affected. These results indicate heat exposure decreases the culturability of L. pneumophila significantly.Second, heated L.

结果显示，退伍军人菌（108 cells/ml）於60℃受热5分钟与30分钟后，可培养浓度分别下降了4 log CFU/ml与6 log CFU/ml，而细胞膜完整性则分别下降56 %与83 %，但未造成总细菌浓度之改变，故可知受热60℃主要影响细菌的可培养性。

This paper designs the communication system of radio telescope FAST.

针对500m口径球面射电望远镜FAST分布式控制系统的特点完成了其通信系统的设计。

Political sheep's step-by-step a large number of fossils unearthed in the county soil Ma Ali after rural village in the middle of sallow pelitic siltstone.

步氏和政羊化石大量出土于广河县阿力麻土乡后山村，产于灰黄色泥质粉砂岩中。