In xenopus embryonic extracts camp concentration and pka activity also oscillations accompany with the cell cycle , low in mitosis and increased during m / g1 transition , keep high until next mitosis , and the mechanism concern with the cdc25 phosphorylation state and cyclin b concentration . mouse fertilized egg is the most simple and natural model for cell cycle that near to human , but little is know about pka on mpf also pka on mitosis 通过对非洲爪赡胚胎细胞周期的研究发现jka活性也随细胞周期变化而波动，在m期出现时pka活性下降，而m间期转换时pka活性达最大值，一直维持高值直到下一个m期出现，其对mpf活性调节与cdc25磷酸化状态及周期素b表达有关。
At that time , cytosolic fluorescence intensity decreased to normal level , which shows that most of cells get through the gl / s point and enter the log phase . when cultured in medium that neucl was omitted , most of the cells were synchronized at gl stage of cell cycle . with flow cytometry , we found that cytosolic cam content of gl cells was higher than that of normal cells at log stage 在激光扫描共聚焦显微镜下观察不同周期时相裂殖酵母细胞中cam的浓度及分布变化，结果表明，分裂期细胞总体荧光强度强于间期细胞；而对同一细胞内荧光强度的分析说明，间期细胞的荧光主要分布于胞质中，细胞核内则分布较少；而正在进行有丝分裂的细胞内荧光主要集中于赤道板处；刚完成有丝分裂的细胞内荧光则相对集中于两端或其中的一端。
The onset of mitosis is induced by activation of mpf , a highly conserved complex consisting of a kinase , cdc2 , and an activating subunit , cyclin b . during the cell cycle the concentration of the catalytic subunit cdc2 remains constant while cyclin accumulates from interphase to mitosis and is degraded at each metaphase - anaphase transition 在许多物种的早期胚胎细胞分裂过程中，由间期到m期的连续分裂是一个重要特点。 mpf ( m期促进因子， m - phasepromotingfactor ， mpf ，又可称为成熟促进因子maturationpromotingfactor ， mpf )由cdc2和周期素b两个亚基组成。
In this paper , besides the simulation of the normal physiological condition , ecg waveforms under pathological conditions due to cell membrane ionic channel mutation such of as long - qt syndrome , short - qt syndrome , t wave alternans and brugada syndrome also be simulated and researched , which validated this ecg model , at the same time be beneficial to further research on 文中除了仿真正常生理状态下的心电图以外,对长qt间期综合症、短qt间期综合征、 t波电交替和brugada综合症等几种由细胞膜离子通道改变所引起的病态心电图波形也进行了仿真研究,充分验证了模型的正确性,同时也为进一步在此上进行疾病治疗药物的研究奠定了基础。
The main results as follows results from sinoatrial node in vivo 1 、 under bilateral vagi intact condition the value of hf ( high frequency power ) component , lf ( low frequency power ) component and apen value of ibis was the highest , but the lf / hf ratio was the lowest ; unilateral vagotomy decreased apen value of ibis , right vagotomy increased lf / hf ratio but left vagotomy did not 05 ） 。在离体窦房结还记录到自发轻度不规则放电，自发不规则放电使窦房结放电间期近似嫡从对照时的0二8土0 09 （ n 6 ）升高到不规则放电时的0
Further - more , by constructing the relations between the fiflite subshift on the symbolic set and the chaotic iterated map by means of marotto theorem , we investigate the structure of the invariant as well as the estimation of topological entropy , zeta - - function , lyapunov exponent . by the end of the chapter , we present several conclusions on the perturbed chaotic systems and a theorem about " heteroclinical repellers imply chaos " . in chapter 3 , we are mathematically modelling two particular classes of impul - sive differential equations having chaos dynamics 在本文的第三章中，我们建立了脉冲微分方程中的两类混沌模型，一类利用映射的扰动理论证明了系统随着参数变化时具有不同意义的混沌动力学行为；另一类则利用勒贝格可测的概念给出了脉冲微分方程中所特有的关于脉冲间期函数初值敏感的定义，同时理论证明了在一类脉冲微分方程中确实如新定义所描述的复杂动力学行为
Amy da release of proestrus female rats was apparently higher than estrus , metestrus and ciestrus female rats , but no significant difference was observed among estrus , metestrus and ciestrus female rats . da release in ovx rats was higher compared with male rats , but lower than proestrus female rats . no difference appeared among ovx rats and estrus , moiestrus , ciestrus female rats 电刺激vta诱发的雄鼠amyda释放量明显低于雌鼠和ovx鼠；处于动情前期雌鼠的amyda释放量高于动情期、动情后期和动中文摘要情间期雌鼠；而动情期、后期及间期雌鼠间da释放量差异无统计学意义； ovx鼠da释放量高于雄鼠，低于动倩前期雌鼠，但与动情期、后期及间期雌鼠比较无显著差异。
It was recognized as a brain - gut peptide since the peptide and its receptor exist in the central nervous system . previously , we demonstrated that motilin and motilides activates cells in paraventricular nuclei ( pvn ) reflected by increased gastric motility and induction of the immediate early gene c - fos in conscious rat , which suggests central motilin participates in the regulation of gastric motility . it was reported in 2001 that ghrelin is an appetite - stimu latory signal from stomach with structural resemblance to motilin 胃动素( motilin ， mt )是由小肠上段粘膜内分泌细胞合成并分泌的22个氨基酸组成的脑肠肽，调节消化间期胃运动， pvn内给予胃动素和胃动内酯( motilides )可增强清醒大鼠胃运动，中枢微量注射胃动素可诱导pvn中立即早期基因c - fos的表达，提示中枢胃动素参与胃运动的调控，人ghrelin和胃动素之间有36的相似性，而且二者的受体之间有50的相似性，因而有人称ghrelin为“胃动素相关肽” 。
