查询词典 threshold exposure

OBJECTIVE: To study the effects of prolonged 75% oxygen exposure on the expression of vascular endothelial growth factor and its receptors (VEGFR1 and VEGFR2) in the neonatal rat lungs and to elucidate the effects of prolonged exposure of high concentration of oxygen on lung vascular development and its relationship with bronchopulmonary dysplasia.

目的：研究持续吸入75%氧对新生大鼠肺血管内皮生长因子（vascular endothelial growth factor，VEGF）及其受体（VEGFR1和VEGFR2）表达的影响，探讨较高浓度吸氧对肺血管发育的影响及与支气管肺发育不良（bronchopulmonary dysplasia，BPD）的关系。

Low-dose mercury exposure can significantly change physiological and biochemical indexes of the blood of SD rats and shows a clear dose-response relationship; moreover, low-dose mercury exposure mainly causes anemia of cellule and olig-pigment and damage of liver and kidney of SD rats in various degrees.

低剂量汞暴露对SD大鼠血液生理生化指标有显著影响，且存在明显剂量-效应关系；低剂量汞暴露主要引起SD大鼠小细胞低色素性贫血及不同程度肝、肾损伤。

After a single dose exposure of technical chlordane, concentrations of chlordane in brain, liver, intestine, muscle, skin, lipid, serum and residues in stomach and intestine as well as feces were measured at 60, 120, 160, 200, 300, 500, 1000 and 2000min against the control group without exposure.

分别测定了未暴露个体和一次性暴露后60、120、160、200、300、500、1000和2000min时脑、肝、肠、肌肉、皮、脂肪等组织和器官样品以及胃部和肠道残余物、排泄物中的氯丹含量。

Exposure to 100 days would be grouped mice:treatment 1,treatment 2 group,model group,a separate normal group,a group with administration of polygonum multiflorum thunb oral treatment of compound preparation,rule 2 group traditional Chinese Medicine Haierfu row metal treatment as a treatment for oral gavage control group,model group and normal group administered with distilled water for volume control.100 days after treatment and exposure at the same time until the end of the experiment.

染毒到100d开始将染毒小鼠分组：治疗1组、治疗2组、模型组，另设一正常组，治疗1组用何首乌复方制剂灌胃治疗，治疗2组用排重金属中药制剂海尔福口服液灌胃治疗作为治疗对照组，模型组和正常组用等体积蒸馏水灌胃作正常对照。100d后治疗与染毒同时进行，直到实验结束。

A measurement method of effective exposure time on curtain shutter is raised,which is based on analysis and calculation of effective exposure time on aerial camera shutter.

为评测卷帘式航摄快门曝光时间的均匀性，根据有效曝光时间的分析计算，提出了一种可变缝宽式快门有效曝光时间均匀性的测试方法。

The factors that influence quality exposure are: photoptic gum of quality, performance, exposure before the death mask of humidity, light source performance, and a light source and the distance between the screen and so on, should be based on actual conditions seihan parameter.

感化曝平质量的身分有：感平胶的质量、毕命本能机能、曝平后网版的湿量、平源本能机能以及平源与网版之间的间隔等，答根据本质境况订定制版参数。

An image formation apparatus comprises: an image formation apparatus main body; plural image formation units being provided detachably in the image formation apparatus main body, each of the image formation units including an image carrier and an exposure device that applies light to the image carrier for writing a latent image onto the image carrier; and a positioning section that positions the exposure device of each of the image formation units relative to the image formation apparatus main body.

本发明公开了一种图像形成装置，包括：图像形成装置主体；多个图像形成单元，其可拆卸地设在所述图像形成装置主体中，每个所述图像形成单元包括图像载体和曝光装置，所述曝光装置向所述图像载体照射光，以将潜像写入到所述图像载体上；以及定位部分，其相对于所述图像形成装置主体定位各个所述图像形成单元的曝光装置。

Limit direct sun exposure during midday: Another way to limit exposure to UV light is to avoid being outdoors in intense sunlight too long.

限制直接暴露于太阳在正午：另一种方式来限制暴露于紫外线灯，以避免在户外强烈阳光下太久。

But in a news release issued today, ITA President Dan Humiston acknowledged that UV exposure from tanning beds is not discernibly different from UV exposure from the sun.

但在今天的新闻发布会中，ITA主席Dan Humiston承认日光浴床的紫外线暴露同暴露于日光中的紫外线的区别不易被发现。

The visual fields were switched through double exposure and circumscription exposure to achieve the reappearance of different subject-background combinations in the images.

拍摄中运用二次曝光和分区域曝光技术切换不同视场以实现不同"主—背"组合图的再现。

Go to your desktop and right click in a blank space.

请到您的桌面，然后右击一个空白。

Tara appears in Buddhism, Jainism, and particularly, Tibetan Lamaism, as a complex array of manifestations: goddess of ascetism and mysticism, mother creator, protectress of all humans as they cross the sea of life.

度母出现在佛教，耆那教里面，尤其是西藏的喇嘛教，作为一系列的陈列阵容；神秘的女神，创世之母，人类横过生命之海洋的女性保护者。