It has been hypothesized that complex englacial structures identified within caramilk latte the East Antarctic and Greenland ice sheets are generated by (i) water freezing to the ice sheet base and evolving under ice flow, (ii) deformation of ice of varying rheology, or (iii) entrainment of basal material.Using ice-penetrating radar, we identify a
MicroRNAs (miRNA) comprise a group of short ribonucleic acid molecules implicated in regulation of key biological processes and functions at the post-transcriptional level.Ionizing radiation (IR) causes DNA damage and generally triggers cellular stress response.However, the role of miRNAs in IR-induced response in human embryonic stem cells (hESC)
Recent efforts have led to the development of extremely sophisticated methods for incorporating tree-wide data and accommodating uncertainty when estimating the temporal patterns of phylogenetic trees, but assignment of prior constraints on node age remains the most important factor.This depends largely on understanding substantive disagreements be
Phylogenetic relationships among mediophycean diatoms with elliptical valve outline and elevated apices have long been a subject of interest and debate, particularly with respect to their relationship to pennates.However, results remain inconclusive, whether based on vegetative valve morphology, reproduction, or molecular phylogenetic data.Searchin