A modification of the mRNA differential display method was used to an alyze differential gene expression during early embryonic development in the mou se. This method detects appropriate changes in the temporal patter...A modification of the mRNA differential display method was used to an alyze differential gene expression during early embryonic development in the mou se. This method detects appropriate changes in the temporal pattern of expressio n of amplicons and proteins by DD PCR and SDS PAGE analysis. In addition, it i ndicates that the activity of genes during early embryonic development was tempo ral; different degrees of activation→expression→translation occurring with cha nging spatio temporal and environmental conditions. The selectivity of gene exp r ession and levels of transcription and translation are a key controlled regulat ed position during early embryonic development in the mouse .展开更多
Global Positioning System (GPS) observations during four measurement campaigns from 1992 to 1999 are used in a study of the temporal and spatial variation characteristics of crustal deformation of active tectonic bloc...Global Positioning System (GPS) observations during four measurement campaigns from 1992 to 1999 are used in a study of the temporal and spatial variation characteristics of crustal deformation of active tectonic blocks in North China. The Euler vectors for these active blocks are determined on the basis of GPS velocities of a group relative stable points in 1992,1995,1996 and in 1996,1999 respectively. We have studied the relative motion between blocks at the boundaries and the intra block deformation field. We have also inverted the strain rate fields for these active blocks by bi cubic spline model based on the GPS velocity field. The results show that the intra block deformation rates are different from those in block boundary zones, and are also different in different periods; the deformational field is generally characterized by intra-block extension in North China.展开更多
文摘A modification of the mRNA differential display method was used to an alyze differential gene expression during early embryonic development in the mou se. This method detects appropriate changes in the temporal pattern of expressio n of amplicons and proteins by DD PCR and SDS PAGE analysis. In addition, it i ndicates that the activity of genes during early embryonic development was tempo ral; different degrees of activation→expression→translation occurring with cha nging spatio temporal and environmental conditions. The selectivity of gene exp r ession and levels of transcription and translation are a key controlled regulat ed position during early embryonic development in the mouse .
文摘Global Positioning System (GPS) observations during four measurement campaigns from 1992 to 1999 are used in a study of the temporal and spatial variation characteristics of crustal deformation of active tectonic blocks in North China. The Euler vectors for these active blocks are determined on the basis of GPS velocities of a group relative stable points in 1992,1995,1996 and in 1996,1999 respectively. We have studied the relative motion between blocks at the boundaries and the intra block deformation field. We have also inverted the strain rate fields for these active blocks by bi cubic spline model based on the GPS velocity field. The results show that the intra block deformation rates are different from those in block boundary zones, and are also different in different periods; the deformational field is generally characterized by intra-block extension in North China.
