温度和潮汐对条斑紫菜单孢子放散的影响

条斑紫菜(Porphyra/Pyropia yezoensis)可以产生单孢子,因其能快速直接萌发成叶状体,所以在生产上具有重要的应用价值。本实验主要研究了采样的潮汐周期和地理群体对条斑紫菜叶状体产生单孢子的影响,发现不同采样时间所造成的环境温度变化和潮汐的变化(即节律性的干出)以及不同采样地点所代表的遗传多样性都对单孢子的放散有显著影响。     

Chaos in a Bose-Einstein condensate

It is demonstrated that Smale-horseshoe chaos exists in the time evolution of the one-dimensional Bose--Einstein condensate driven by time-periodic harmonic or inverted-harmonic potential. A formally exact solution of the time-dependent Gross-Pitaevskii equation is constructed, which describes the matter shock waves with chaotic or periodic amplitudes and phases.