查询词典 mechanisms

Objective To explore the mechanisms of heme oxygenase-1 (HO-1) and endogenous CO and the relationship between them in asthma.

目的 探讨血红素氧合酶-1（HO-1）和内源性一氧化碳在哮喘发病机制中的作用及相互关系。

Aim To investigate radioprotective effects of platelet factor 4 (PF4) on hemopoiesis of mice after γ-ray irradiation and their mechanisms.

目的研究血小板第 4因子(PF4)对 60Co γ射线辐射损伤小鼠骨髓的造血防护作用及其机制。

This chronic destruction leads to compensatory mechanisms, including hyperplastic marrow and hepatomegaly (due to extramedullary hematopoiesis).

这种红细胞的慢性破坏使机体产生代偿机制，包括骨髓增生、肝肿大。

This paper reviews the effects of social learning on foraging behavior in herbivorous birds and mammals and the underlying mechanisms.

综述了社群学习对植食性鸟类和哺乳动物觅食行为的作用，并述评了其学习机制。

The effects of different factors on the laser-induced graft polymerization on the PET surface were analyzed, and the mechanisms were discussed. The factors were: 1 Monomers with smaller molecules resulted in better modification than polymeric monomers. Acrylamide monomer was chosen as hydrophilic modifier finally; 2 Higher concentration of the monomer solution favored the graft reaction; 3 With the increasing laser fluence, the surface hydrophilicity of PET films increased at first, then decreased. More laser pulses led to a more hydrophilic surface; 4 Benzophenone as a photosensitizer hindered the graft polymerization; 5 The homopolymer retardant of ammonium iron sulfate hexahydrate in a proper concentration retarded the formation of homopolymers and promotes the graft copolymerization; 6 The solvent of monomer solution also affected the graft reaction. Different solvents functioned in different ways. Ethanol can promote the graft reaction because of the activity of hydrogen in its structure; 7 pH value of the monomer solution affects the polymerization rate, and a lower pH value was favorable to the graft reaction.

这些影响因素的作用分别为：1小分子单体的表面改性效果好，确定以丙烯酰胺为亲水性改性单体；2较高的单体溶液浓度有利于接枝反应；3激光能量密度增大，薄膜表面亲水性先显著增强，后又减弱；激光脉冲次数越多，改性后表面亲水性越强；4光敏剂BP对PET表面接枝聚合反应有阻碍作用；5适当浓度的均聚物抑制剂六水合硫酸铁铵能减少单体均聚物的生成，促进接枝聚合；6单体溶液的溶剂也影响接枝聚合的反应进程，不同溶剂的影响作用原理不同，含较活泼氢的乙醇能促进接枝反应；7溶液pH值影响单体聚合速率，pH值较低有利于接枝反应。

The mechanisms of the formation of 1, 3, 5-trinitro-1, 3, 5-triazacyclohexane in the nitrolysis of hexamethylenetetramine with nitric acid and with the mixture of nitric acid and ammonium nitrate were first studied by NMR tracing.

本文首次采用核磁共振跟踪化学反应的方法研究了在直接法和K-法中黑索金（1，3，5-三硝基-1，3，5-三氮杂环已烷，RDX）的生成反应机理。

The mechanisms of high-energy ultrasonic treatment are discussed.

分析讨论了高能超声的作用机理。

One way to do that is to hijack the mechanisms used for wrapping a class with virtual functions.

一个方法是，在封装带虚函数的类时，劫持用于封装的机制。

It is speculated that the hyperpolarization of VSMCs and decreased calcium influx through voltage-dependent calcium channels might be one of the electrophysiological mechanisms involved in the depressed vasoreactivity of hindquarter arteries induced by simulated weightlessness.

以上结果提示，VSMCs的超极化及进一步引起的通过电压依赖性钙离子通道的钙内流减少可能是模拟失重引起后身动脉反应性降低的电生理机制之一。

Histamine is a substance produced by the body as part of its defence mechanisms.

组胺是机体作为防御机制的一部分产生的一种物质。

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。