引起因素

Objective: To investigate the characteristics of nosocomial infection in patients with acute leukemia and provide basis for its prevention and treatment .

目的：探讨急性白血病医院感染的特点，分析引起医院感染的危险因素，为医院感染防治措施的制定提供客观依据。

There are many factors resulted in male infertility. Majority is associated with sperm count, morphology and motility. Men with oligospermia, asthenospermia, teratozoospermia and azoospermia account for 20~25% of the cases.

引起男性不育的因素有很多，大部分与精子的数目、形态及运动功能有关，其中由于精子生成过程的停滞或障碍所导致的少精子、弱精子、畸形精子和无精子症占男性不育的20～25％。

Unlike previous models in which overexpression of the amyloid precursor protein results in amyloid plaque formation, have produced mice that overexpress only Aβ40 or Aβ42 and prove that Aβ42 is critical for the formation of amyloid deposits in vivo.

不同于早先调控淀粉样蛋白前体蛋白的动物模型，McGowan 等(Neuron， Vol 47， 191-199， 21 July 2005)培养了专一表达Aβ40或者 Aβ42的老鼠，结果直接证明了Aβ42 确实是引起淀粉样蛋白沉淀的主要因素，而不是Aβ40。

The formation of Pannus is the character of rheumatoid arthritis. There is a lot of evidence that the overexpression of vascular endothelial growth factor is the major etiology for the formation of the pannus.

滑膜血管翳形成是类风湿性关节炎的主要病理特征，大量研究发现滑膜组织中血管内皮生长因子的过度表达是引起滑膜血管翳形成的主要因素。

At present it is widely accepted that the damages of the nasal turbinate bones and mucus caused by Bordetella bronchiseptica laid the foundation for the invasion toxigenic Pasteurella multocida. The mixture of Bordetella bronchiseptica and toxigenic Pasteurella multocida, together with some other factors, is the main cause of natural AR.

经过多年研究，现在大多数学者认为，支气管败血波氏杆菌能引起一定程度的鼻粘膜和鼻甲骨损害，但这些病变的严重后果是为正常猪鼻腔不能定居的产毒素多杀巴氏杆菌建立感染铺平道路，Bb和T+Pm的混合感染加上非传染因素交织在一起，是在自然条件下临床型AR的发生原因。

That scar formation and cardiomyocytes loss result from myocardial infarction is an important cause affecting heart function, and is also the pathobiological basis leading to heart failure and even death.

心肌梗死(myocardial infarction，MI)引起的瘢痕形成和心肌细胞减少是影响心功能的重要因素，也是导致心力衰竭乃至死亡的病理基础。

In recent years,inflammation,including periodontal inflammation were found may cause at...

但是近年来，在冠心病的发病过程中，炎症作为一种促进因素，引起了很大的关注。

The results indicated that the histopathological changes of periodontum occured earlier and more seriously in diabetic rat. This demonstrates the promote effect of diabetes on the occurence and progression of the experimental periodontitis.

而糖尿病大鼠在同样的实验条件下，3周便出现类似的损害，9周时，出现深层组织的炎细胞浸润、牙槽骨吸收和深牙周袋形成，表明糖尿病具有缩短引起实验性牙周炎的时间和加重牙周组织破坏的作用，认为在建立大鼠实验性牙周炎模型的过程中引入糖尿病这一因素是一值得推荐的措施。

objective to search the factors of liver injury via the anit-induced liver injury in rats.methods male sprague-dawley rats,were divided into 4 groups,data were analyzed using a completely randmized factorial anova and linear correlation.results after anit intoxication,the necrosis of hepatic cell and neutrophil infiltration im periportal region of the liver were observed in liver setions.jinshisan can reduce the alt,the tbil.pla2 correlated positively with alt、akp and tbil.conclusion the severity of anit-induced liver injury correlated positively with the pla2.jinshisan can protect against the rat anit-induced liver injury.

目的 拟通过对α－萘异硫氰酸酯诱导大鼠肝损伤发病机理的探讨，对引起肝损伤的因素进行系统的研究。方法选择s-d大鼠，雄性，随机分4组，检测数据以平均值±标准差表示，采用方差分析，相关分析进行统计学处理。结果s-d大鼠经anit染毒后，病理切片显示肝损伤明显，汇管区有大量中性粒细胞浸润。经金石散及地塞米松治疗后，生化指标均有所下降，中药金石散优于地塞米松，血生化指标与pla2活性相关分析显示，呈正相关。结论 anit诱导的肝毒性损伤程度与肝组织匀浆pla2活力呈正相关，应用抑制剂降低pla2活力，肝损伤程度也减轻，中药金石散具有降低pla2活性，减轻肝毒性损伤。

At the same time, we found that the aggravation of patients' jointpain was correlate with the enhancement of lipid peroxidate reaction when the weather changed bed.

提示机体脂质过氧化物反应增强可能是气象变化引起某些RA息者出现关节不舒或疼痛加重反应的主要因素之一。

According to the clear water experiment, aeration performance of the new equipment is good with high total oxygen transfer coefficient and oxygen utilization ratio.

曝气设备的动力效率在叶轮转速为120rpm～150rpm时取得最大值，此时氧利用率和充氧能力也具有较高值。

The environmental stability of that world - including its crushing pressures and icy darkness - means that some of its most famous inhabitants have survived for eons as evolutionary throwbacks, their bodies undergoing little change.

稳定的海底环境─包括能把人压扁的压力和冰冷的黑暗─意谓海底某些最知名的栖居生物已以演化返祖的样态活了万世，形体几无变化。