In order to improve the performance of welded joints in Al-Li alloys, butt consisting 2 mm thick 2195-T8 alloy plates are fabricated by laser beam welding with different filler wires this paper. The ER2319CT, ER4047, and without investigated context microstructure, distribution alloying elements, burning loss tensile strength. From fusion boundary center weld seam (WS), crystal morphologies var...

L ittle bulbous neuronal protrusions known as spines slow diffusion along dendrites, say Fidel Santamaria, George Augustine (Duke University, Durham, NC), and colleagues. Based on their new data, they offer a new hypothesis for how active synapses are tagged during long-term potentiation (LTP). Spines are thought to act locally by preventing the chemical messengers made at a synapse from leakin...

We performed patch-clamp recordings from morphologically identified and anatomically mapped pyramidal neurons of the ventral hippocampus to test the hypothesis that bursting neurons are distributed on a gradient from the CA2/CA1 border (proximal) through the subiculum (distal), with more bursting observed at distal locations. We find that the well-defined morphological boundaries between the hi...

Dendrites are key integrators of synaptic information in neurons and play vital roles in neuronal plasticity. Hence, it is necessary that dendrite arborization is precisely controlled and coordinated with synaptic activity to ensure appropriate functional neural network integrity. In the past several years, it has become increasingly clear that several cell intrinsic and extrinsic mechanisms co...

Sensory dendrites depend on cues from their environment to pattern their growth and direct them toward their correct target tissues. Yet, little is known about dendrite-substrate interactions during dendrite morphogenesis. Here, we describe MNR-1/menorin, which is part of the conserved Fam151 family of proteins and is expressed in the skin to control the elaboration of "menorah"-like dendrites ...

nesar anticline is located in west of country and in north of kermanshah province. pattern of drainage network at each district is under the effect of various factors which has intensive anomaly in nesar anticline in spite of its low area and this in turn reflects different lithology, tectonic effects and slope changes in anticline. the goal of this research is the recognition of influential fa...