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Dramatic shifts in community composition occur between vertical and horizontal rocky surfaces in subtidal environments worldwide, yet the forces mediating this transition are poorly understood. Vertical rock walls are often covered by lush, diverse communities of sessile suspension-feeding invertebrates, while adjacent horizontal substrates are dominated by algae, or corals in the tropics. Mult...
Employing direct and alternative electric currents at the time of casting and solidification modified grains of Al and Si. The highest wear resistance was obtained in the direct current, and for alternative current the wear resistance corresponded to the electric current. The change of polarity in the pure Al did not influence the wear resistance, but for the Al-Si alloy the highest wear resist...
In many animals, primordial germ cells (PGCs) migrate through the embryo towards the future gonad, a process guided by attractive and repulsive cues provided from surrounding somatic cells. In Drosophila, the two related lipid phosphate phosphatases (LPPs), Wunen (Wun) and Wun2, are thought to degrade extracellular substrates and to act redundantly in somatic cells to provide a repulsive enviro...
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