周期的

The SMMC-7721 hepatoma cell line of experimental groups and control groups were cultured with the addition of sodium selenite, potassium iodide or triiodothyronine (T3). The cell quantity was checked by the MTT assay , and the cell cycle was observed by flow cytometry and levels of AFP and ALB in the culture solution were determined by RIA.The SD rats were divided into positive control group, negative control group, T3 group and mixture group (the mixture of sodium selenite, KI and T3). After two weeks of the administration of sodium selenite、 KI and T3,Walker256 cells were transplanted into the abdominal cavity. The administration was kept on for another two weeks, then observed the morbility and mortality of the rats with ascites carcinoma. At the end, the ascites were for the cells counting and the cell cycles analysising.

方 法：在体外，应用细胞培养的方法，培养SMMC－7721肝癌细胞系，分为试验组和对照组，试验组加入不同浓度Se、I或T3干预，培养一段时间后，通过噻唑蓝试验、流式细胞仪，观察细胞数量及细胞周期的变化，测定细胞培养上清液中甲胎蛋白、白蛋白的水平，观察细胞分化情况；在体内，将试验用SD大鼠分成阴性对照组、阳性对照组、T3组和混合组（为Se、I和T3混合物），首先预防性用药2周，然后给试验组大鼠和阳性对照组大鼠腹腔注射Walker256细胞，制造腹水癌大鼠模型；继续用药2周，观察各组大鼠发病率及死亡率，测量不同时期大鼠血清FT3含量，通过流式细胞仪测量大鼠腹水细胞数及细胞周期变化。

In this paper, a free vibration equation of the semi-rigid frame structure is built. The formula to calculate the natural periods is deduced. Furthermore, the effects of semi-rigid connection on natural periods are studied.

建立了半刚性连接框架结构的自由振动方程，推导出半刚性连接框架结构基本自振周期的计算公式，分析了连接刚度对基本自振周期的影响。

One of the outstanding questions facing solar physicists is the origin of the solar magnetic cycle: What drives the 11-year sunspot cycle?

太阳物理学家面临的突出问题之一是太阳磁周期的起源：是什么推动了11年的太阳黑子周期？

The paper analyzed the factors that influence the defining of the maintenance cycle of the lubrication system in mining truck engine,and scientifically sensible method to determine the maintenance cycle was put forward.

分析了矿用汽车润滑系统保养周期制定的影响因素，提出了科学合理的制定矿用汽车润滑系统保养周期的方法。

In this case, enterprise's life cycle, especially the life cycles of Chinese enterprises becomes a very important subject for research Through the study on " book of changes ", we find that the divinatory symbol order of 64 divinatory symbols and its philosophy thought have contained various kinds of key elements in enterprise's behavior in book of changes.

这种情况下，对于企业生命周期的研究，尤其是对中国企业的生命周期研究是一项非常重要的研究课题。

The protein synthesis of Ceteuisiae fermentum cell was inhibited by NCS when they were cultured in the medium with ~(35)S-Met.3. The Ceteuisiae fermentum cells treated with NCS were mostly in G1 stage during the cell cycle measurement. The amount of cells in Gl stage increased about 20% compared to the control. These data suggested that the process of protein synthesis may be inhibited or prolonged by NCS.

NCS处理下，观察酵母细胞周期时发现，多数细胞处于细胞周期的G1期，G1期细胞数目比对照多约20%，暗示NCS存在时，酵母细胞中的蛋白质合成过程延长或受抑制，进一步研究发现NCS对酵母细胞的凋亡率基本没有影响。

Section One analyzes the theoretical basis of Arithmetic Measuration.

第一章&波动周期的测定方法&从方法论的角度对波动周期的测定方法进行了归纳和总结。

That way, the development cycle of internal software system will be decoupled with that of EA development cycle which is notoriously slow.

这样一来，开发周期的内部软件系统将解耦与EA的开发周期，这是众所周知的缓慢。

Changes in rainfall patterns would disrupt agriculture. Warmer temperatures would shift grain-growing regions pole wards.

降水周期的变化会破坏农业的发展，气温上升会改变小麦生长的周期。

For sure, 2012 -- specifically December 20, 2012 -- is a key date for the Mayas, as it represents the end of the fourth of these millennial cycles which elders say is symbolized by water.

的确，2012年，具体地说是2012年12月20日是玛雅历法的一个关键日期，因为它代表着第四个千年周期的结束，长者称这个周期是以水为特征的。

Neither the killing of Mr Zarqawi nor any breakthrough on the political front will stop the insurgency and the fratricidal murders in their tracks.

在对危险的南部地区访问时，他斥责什叶派民兵领导人对中央集权的挑衅行为。

In fact,I've got him on the satellite mobile right now.

实际上 我们已接通卫星可视电话了