منابع مشابه
Orienting early cleavage
DPP shapes up wing cel ls PP is not a savior for fly epithelial cells, according to new reports from Matthew Gibson and Norbert Perrimon (Harvard Medical School, Boston, MA) and from Jie Shen and Christian Dahmann (Max Planck Institute, Dresden, Germany). Once thought to be a survival factor in the wing imaginal disc, the DPP morphogen is now shown to regulate cell architecture. Previous experi...
متن کاملMorphological and morphometric study of early-cleavage mice embryos resulting from in vitro fertilization at different cleavage stages after vitrification
The aim of this study was to examine the possible morphological and morphometric changes resulting from vitrification of embryos at the cleavage stage. In this study, 30 mice early-cleavage embryos at different stages of cleavage, resulting from in vitro fertilization (IVF) techniques, were examined before and after vitrification. Digital images were taken from embryos before and after vitrific...
متن کاملAbnormal Early Cleavage Events Predict Early Embryo Demise: Sperm Oxidative Stress and Early Abnormal Cleavage
Human embryos resulting from abnormal early cleavage can result in aneuploidy and failure to develop normally to the blastocyst stage. The nature of paternal influence on early embryo development has not been directly demonstrated although many studies have suggested effects from spermatozoal chromatin packaging, DNA damage, centriolar and mitotic spindle integrity, and plasma membrane integrit...
متن کاملCompetition in early exogenous orienting between 7 and 21 weeks.
Exogenous (stimulus-driven) orienting between 7 and 21 weeks of age was examined in 2 experiments using a display with multiple potential targets of attention. On each trial a small moving probe was used to draw attention to one side of the display or the other. This moving probe appeared simultaneously with 27 static bars. In the first experiment, sensitivity to the moving target was affected ...
متن کاملAttentional load asymmetrically affects early electrophysiological indices of visual orienting.
Recent behavioral studies suggest that asymmetries in visuospatial orienting are modulated by changes in the demand on nonspatial components of attention, but the brain correlates of this modulation are unknown. We used scalp-recorded event-related potentials to examine the influence of central attentional load on neural responses to lateralized visual targets. Forty-five participants were requ...
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ژورنال
عنوان ژورنال: Journal of Cell Biology
سال: 2005
ISSN: 1540-8140,0021-9525
DOI: 10.1083/jcb1691rr4