This asymmetry may contribute to some of the physiological and molecular differences between the blades, including a disparity in the rates of cell proliferation in the subgranular zone of the two blades through RA inhibition of cell proliferation.
Given though the findings that both exogenous RA and mutation of RBP ablate the difference between the two blades, and that in organotypic slice cultures, RA inhibits cell proliferation, the simplest explanation is that the difference is due to the existence of an asymmetry in RA concentration.
The pressure variety at the leading edge due to geometric differences between the twist blade and straight blade coupled with rotation leads to lift off.
Analysis of the main elements illustrated the difference between the types of blades.
Visual acuity is paramount in bladesmithing, because slight temperature variances can mean the difference between a blade that's tough and another that's brittle.
Under control conditions, when cell proliferation was compared between the infrapyramidal and suprapyramidal blades of the dentate gyrus, a significant difference was evident between the blades with lower proliferation in the infrapyramidal blade (Figs. 4A,B, left).
The few reports that have examined the relative differences in neurogenesis between the blades of the dentate gyrus have been conflicting regarding relative levels of, for instance, survival.
Consistent with the previous report [43], GFP+ newborn neuron quantification shows no significant difference between the two hemispheres, while the dorsal blade has more newborn neurons than the ventral blade (Table S1).
Whilst there was little difference at low speeds, as the speed was increased entrainment from the feed tube decreased Po which would be as a consequence of a decrease of the pressure difference between the two sides of the rotating blades.
The pressure difference between the concave and convex surfaces on each blade produces these tangential and normal drag forces.
