次声

The fundamental mechanism of biological function is infrasound\'s biological resonant effect.

次声最根本的生物学作用机制是次声引起的生物共振效应。

The fundamental mechanism of biological function is infrasounds biological resonant effect.

次声最根本的生物学作用机制是次声引起的生物共振效应。

METHODS: The BALB/c mice were exposed to infrasound (8 Hz/130 dB) for 1, 7 and 14 d, respectively, 2 h daily, and the control groups were unexposed.

采用8 Hz， 130 dB的次声分别作用于1， 7和14 d组3个实验组，各雄性Balb/c小鼠20只，每日次声暴露2 h。

The expression of Bcl-2mRNA and P53mRNA in hippocampus after 16Hz, 130dB infrasound treatment In 1 day group, Bcl-2mRNA and P53mRNA were expressed lightly in CA1-CA3 areas in hippocampus and dentate gyrus. Blood vessels dilated lightly. In 7d group, Bcl-2mRNA and P53mRNA were more expressed in areas mentioned above. Dilation of capillaries and small vessels was more obvious. Bcl-2mRNA and P53mRNA were strong positive in endothelial cells of vessels. In 14d group, Bcl-2mRNA and P53mRNA expression was obviously increased in pyramidal cells of hippocampus and granular cells of dentate gyrus, showing deep blue staining. a The endothelial cells in some vessels were also strong positive for Bcl-2mRNA and P53mRNA. Dilation of capillaries and small vessels was lessened. In 21d group, Bcl-2mRNA and P53mRNA expression was decreased in pyramidal cells. In 28d group, little change about the expression and distribution of Bcl-2mRNA and P53mRNA was observed. Lots of Bcl-2mRNA and P53mRNA were scattered in cortex of temporal lobe around hippocampus and callosal gyrus area. Dilation of capillaries and small vessels was lessened obviously. The expression of Bcl-2mRNA and P53mRNA in hippocampus after 16Hz, 90dB infrasound treatment.

次声作用后Bcl-2mRNA和P53mRNA在海马的表达，16Hz、130dB次声作用1d组：两者在海马〓区和齿状回轻度表达，海马内血管轻度扩张；7d组：两者表达在上述区域较1d增多，微血管和小血管扩张较显，血管内皮细胞内可见呈强阳性表达的Bcl-2mRNA和P53mRNA；14d组：海马锥体细胞和齿状回颗粒细胞内Bcl-2mRNA和P53mRNA阳性表达明显增多，呈深兰色，在部分血管内皮细胞内两者强阳性表达，微小血管扩张状态较7d减轻；21d组：锥体细胞胞浆内Bcl-2mRNA和P53mRNA表达减弱；28d组：上述表达及分布与21d组相比无明显改变，海马周围颞叶皮层和扣带回区域亦可见大量散在分布的Bcl-2mRNA和P53mRNA表达，血管扩张状态已明显减轻。90dB次声作用1d-7d后，较对照组无明显变化，14d-21d后轻度表达，28d后，Bcl-2mRNA和P53mRNA表达较强。

In 1-7d group, the difference between experimental group and control group was not significant. In 14-21d group, Bcl-2mRNA and P53mRNA were expressed lightly. In 28d group, the expression were comparatively strong. The results indicated that, after exposure to infrasound with some parameters, with the days elapsing, Bcl-2mRNA expression in neurons of mice hippocampus displayed certain regularity. The progressive increase suggested that infrasound could injure hippocampus, and resultantly, injure and repair neurons DNA.

据此，我们认为：当一定参数的次声作用小鼠后，随着作用天数的延长，小鼠海马内神经细胞Bcl-2mRNA表达有一定规律性，总体趋势表达增强，随次声作用次数进一步增多，21d组和28d组有产生适应的倾向，其意义在于次声作用后引起海马损伤，使神经元DNA损伤并产生修复。

Proper structure design of the infrasonic monitoring arrays is an effective means to restrain the environment noise and enhance the target infrasonic signal.

次声监测台阵结构的合理设计是抑制环境噪声及增强目标次声信号的一种有效手段。

METHODS Three hundred SD rats were ran-domized into six groups:Control,infrasound damage1,3,7,14and21times.8and16Hz,90,100,110,120,130dB infrasound damage was applied to infrasonic damage groups for2h once according to the planned schedule.

SD大鼠300只随机分为正常对照组和次声作用1次，3次，7次，14次，21次6组，置本校研制的次声压力仓内致伤。

The configulation of infrasound monitoring system of atmospheric nuclear explosions in Institute of Acoustics, Chinese Academy of Sciences network design , small infrasonic signaldetection and the ac...

网络设计。弱次声信号检测和次声定位精度。为全面禁试条约国际监测系统尽其所长。

A tripartite array of infrasonic measurement in Changping county of Beijing was arranged using three CSH-1 infrasonic receivers. The infrasonic signals (P-t curve and wave vector) produced by meteor shower from Leo on November 17 in 1998 were observed.

采用三台CSH-1型次声接收器，在北京昌平县布置了一个次声测量三点阵，观测到1998年11月17日狮子座流星雨产生的次声波P-t曲线和波速波向图。

The effect of infrasound on visual functions are related to its frequency and intensity.

结论次声对小鼠视觉电生理功能的影响与次声的强度和频率有关。

We have no common name for a mime of Sophron or Xenarchus and a Socratic Conversation; and we should still be without one even if the imitation in the two instances were in trimeters or elegiacs or some other kind of verse--though it is the way with people to tack on 'poet' to the name of a metre, and talk of elegiac-poets and epic-poets, thinking that they call them poets not by reason of the imitative nature of their work, but indiscriminately by reason of the metre they write in.

索夫农 、森那库斯和苏格拉底式的对话采用的模仿没有一个公共的名称；三音步诗、挽歌体或其他类型的诗的模仿也没有——人们把&诗人&这一名词和格律名称结合到一起，称之为挽歌体诗人或者史诗诗人，他们被称为诗人，似乎只是因为遵守格律写作，而非他们作品的模仿本质。

The relationship between communicative competence and grammar teaching should be that of the ends and the means.

交际能力和语法的关系应该是目标与途径的关系。