Round , smooth nuclear surface , and uniform nuclear pore changed into bumping surface and expanding nuclear pore , then the nuclei broken and disappeared ; 2 ) the degenerate and disappear of cell organelle and senescence of the flag leaf were obviously faster during the ripe of grain ; 3 ) the degenerate and senescence of chloroplast was faster than that of mitochondria ; 4 ) the nuclear of leaf cells broken and disappeared faster than that of the leaf bumdles 即核呈球形，表面光滑，核孔匀称核表面凸凹，部分核孔变大核膜破裂，核解体，消失； ( 2 )在籽粒成熟期小麦旗叶衰老及其细胞器退化消失明显加快； ( 3 )细胞中叶绿体的退化、消失比线粒体稍快； ( 4 )叶肉细胞的细胞核比维管束韧皮组织细胞核解体消失稍快。
By theoretical analysis and experimental investigation to the exasperate position of the heat transfer in the umbrella - plate falling film evaporator , the exasperate experimental formula of the heat transfer was obtained . with the same reynolds , the high - point heat flux density of umbrella - plate evaporator is higher than vertical - plate evaporator could be observed from above formula , which maked out that with little reynolds liquid film was not easy to break 在实验条件下得出了伞板式降膜蒸发器小流量下液膜破裂的实验关联式，此关联式表明极限热通量随临界雷诺数增大而增大，在相同的临界雷诺数下，伞板蒸发器的极限热通量大于直板形蒸发器的极限热通量。
The mechanisms of such treatment have been proposed as inhibition of proliferation and angiogenesis , as well as induction of differentiation and apoptosis , as has been tested by various in vivo and in vitro experiments . in our experiments , it has also been demonstrated that after the treatment of arsenic trioxide , the k562 cells has undergone major morphological changes , which included nuclear shrinkage , membrane bleb and scattered apoptotic bodies . dna gel electrophoresis also discovered that the typical " dna ladder " phenomena in the treatment group , while the control group showed the regular genomic banding 我们在实验中观察到as _ 2o _ 3作用人红白血病k562细胞后，细胞生长明显变缓，部分细胞出现皱缩、染色质浓聚及胞膜起泡现象，部分细胞胞膜破裂，在其周围有致密的凋亡小体出现， dna电泳出现典型的凋亡“梯状”带，提示as _ 2o _ 3能有效抑制k562细胞生长，诱导k562细胞凋亡。
