In chronic lead exposure total CREB content had no obvious changes.
慢性染铅实验：总量CREB的含量无显著性变化。
These chronic exposure s failed to produce any measurable changes in the general appearance, appearance of teeth, activity, growth, mortality, blood, serum chemistry, or fluorine content of the teeth and bones of the rats tested.
这些长时间的暴露没有在被测试老鼠的总体外观、牙齿外观、活动性、生长、死亡率、血液、血清化学性质或牙齿和骨骼的氟含量方面产生任何可测量的变化。
The purpose of this paper was to explore the impact factors on prognosis of workers with chronic benzene poisoning whose WBC count was still below 4×109/L even they had been withdrew from benzene exposure for years.
探讨慢性苯中毒工人在脱离苯作业后白细胞水平仍然低下的影响因素。对 12 0例曾经苯中毒者，按外周血白细胞计数，分为× 10 9/L和≥ 4× 10 9/L两组，比较两组之诊断年龄、接苯工龄、体质指数均数和CYP2E1、MPO、NQO1、GSTM1和GSTT1各基因型的构成比，并用Logistic回归构建苯中毒预后的风险模型。
This study suggests that the spontaneous activity in Nacc neurons of rat could be inhibited by the chronic ethanol exposure.
EEG及功率谱的这种改变以停饮第6天时最为明显，约在停饮第9至10天时，逐渐恢复正常。
To investigate the neural mechanism of ethanol dependence, the alteration of the EEG and their power spectra in the Nacc of the rats during chronic ethanol exposure and withdrawal were analyzed. Stainless steel recording electrodes were implanted in rats'Nacc in advance.
本实验室以往在脑片上的研究发现酒精能改变伏核神经元的兴奋性，为了进一步在整体水平上分析慢性酒精作用的电生理机制；洲究观察了慢性饮酒及停饮过程中大鼠伏核EEG及其功率谱的变化。
Malignancy following enteric bladder augmentation arose in 4.5%(7/153) of our patients and was associated with coexisting carcinogenic stimuli (prolonged tobacco/chronic immunosuppressive exposure), or alternatively with the inherent risk of malignancy existing with bladder exstrophy.
我们研究的接受肠道膀胱扩大术的患者有4.5 ％（ 7/153 ）发生了恶性肿瘤，恶性肿瘤的发生与共存的致癌刺激（长期烟草/慢性免疫抑制剂的服用）有关，或者与膀胱外翻固有的恶性肿瘤发生风险相关。
According to the results from many well-done studies of domestic and international authoritative institutions on relationship of PM10 and health impact, our research identified the Exposure-Response functions in terms of acute and chronic effects associated with increase of unit pollutant.
摘要根据近年来国内外权威机构在可吸入颗粒物与健康效应关系上的研究成果，确定了单位污染物的增减与急慢性健康效应之间的暴露－反应函数关系。
Long-term exposure to sulfur dioxide on the one hand, people who stimulate the upper respiratory tract caused by bronchial smooth muscle contraction reflex, respiratory resistance increased, the decline of respiratory function; on the other hand, and stimulate the Mucosal loss, so that the increased mucous secretion Bianchou, cilia movement blocked, immune function, leading to respiratory tract Drop resistance, induced by different levels of inflammation, such as chronic nasopharyngitis, chronic bronchitis, bronchial asthma and emphysema, and so on.
长期接触二氧化硫的人一方面刺激上呼吸道引起支气管平滑肌反射性收缩，呼吸阻力增加，呼吸功能衰落；另一方面刺激和损失粘膜，使粘膜分泌增多变稠，纤毛运动受阻，免疫功能减弱，导致呼吸道抵抗力下降，诱发不同程度的炎症，如慢性鼻咽炎、慢性支气管炎，支气管哮喘和肺气肿等。
Stotts believes chronic exposure over long periods of time has the most damaging effect.
斯托茨认为，长期接触长时间了最具破坏性的影响。
Bases on vast public survey, this article introduces recent field studies on chronic arsenic poisoning from three aspects: exposure history, clinical symptoms and laboratory evidences, and also explains the meaning of each index to the determination of chronic arsenic poisoning, then bring forward some considerations on further epidemiological studies on chronic arsenic poisoning.
本文首先简要介绍了慢性砷中毒的类型和主要临床表现，然后从砷的接触史、临床表现和实验室检查三个方面介绍国内外大规模现场人群调查的研究现状，并讨论这三方面研究对慢性砷中毒判定的意义，最后提出了进一步开展慢性砷中毒人群流行病学调查的几点思考。
In this cases, there are three achilles tendon exposure accompanied sof tissue defect for trauma, one chronic ulcer of anterior tibial area, one chronic ulcer of lateral mallelous. Results All flaps wered surrived in five patients.
运用腓肠神经营养血管蒂逆行岛状皮瓣修复5例胫前、跟腱、踝部皮肤软组织缺损，其中外伤后跟腱外露皮肤缺损3例，胫前和踝部慢性溃疡各1例。
Methods Five cases soft tissue defect of lower third ofleg were repaired with reversed island flap pedicled with nutrient vessels of sural nerve. In this cases, there are three achilles tendon exposure accompanied sof tissue defect for trauma, one chronic ulcer of anterior tibial area, one chronic ulcer of lateral mallelous.
运用腓肠神经营养血管蒂逆行岛状皮瓣修复5例胫前、跟腱、踝部皮肤软组织缺损，其中外伤后跟腱外露皮肤缺损3例，胫前和踝部慢性溃疡各1例。
On the contrary, compared with the corresponding control group, chronic cold stress resulted in a significant increase of PGE2 content and COX-2 mRNA expression, and the effects of chronic stress increased while the period of cold exposure prolonged.
结果显示，急性冷应激时空肠黏膜PGE2含量和COX-2 mRNA的表达量无显著变化；慢性冷应激时，空肠黏膜PGE2含量和COX-2 mRNA表达量均显著升高，并随着冷应激时间的延长而降低。
Action changes in both the period of exposure and convalescence were observed periodically using acute and chronic inhalation, and changes of anatomy and histology of respiratory organ were observed, too.
运用急性和慢性染毒方法，定期观察染毒期间和染毒后小鼠的行为变化，并观察染毒后呼吸器官的大体解剖和组织学变化。
Exposure to dusts and other harmful materials in the air can lead to Chronic Obstructive Pulmonary Disease.
接触粉尘和其他有害物质的含量，可导致慢性阻塞性肺疾病
Objective To explore the chronic effect of low levels of 2, 3, 7, 8-tetrachlorodibcnzo-p-dioxin exposure on the protein expression profile in the serum of rats and to get the further understanding of the molecular mechanism of TCDD toxicity.
目的 探讨低剂量二英慢性暴露对雄性大鼠血清蛋白表达的影响，进一步加深对二英毒性机制的理解。
B. Chronic anovulation and progesterone deficiency in this transition period may lead to long periods of unopposed estrogen exposure and endometrial hyperplasia.
B。在这个阶段出现慢性无排卵和孕激素不足，可以导致无对抗性的雌激素暴露和子宫内膜过渡增生。
Flight crews also face chronic exposure to cosmic radiation, which is a hazard for pregnant women as well.
飞行全体机员也面临着长期暴露在外层空间幅射的危险，这对孕妇也一样是有害的。
Both high doses and chronic exposure are harmful to children, says Abramson.
在高剂量和长期接触有害儿童说，阿布拉姆森。
Experiments have shown there to be no harmful effects from chronic exposure to acetylene at high concentrations.
实验显示慢性接触高浓度乙炔没有有害影响。