Positive feedback plays a key role in the ability of signaling molecules to form highly localized clusters in the membrane or cytosol of cells.Such clustering can occur in the absence of localizing mechanisms such as pre-existing spatial cues, diffusional barriers, or molecular cross-linking.What prevents positive feedback from amplifying inevitabl

Family Nobakht One of the families Knowledge friend Khuzestan who were in the first Abbasid era great efforts In way revival of ancient Iranian culture And link ideas Iranians with ideas Shiite demonstrated.Although Islam came to Iran the social classes, As they in the past, in the fall, But some of dynasties, such as family scholar Nobakhti, With

Inter-tracheid and cross-filed pit pairs in compression and opposite wood of Norway spruce (Picea abies) were examined.The size, appearance, and frequency of bordered pits on the radial side of axial tracheids and their aperture specification were studied.The type, size, and number of half-bordered pits between the axial tracheids and rays per cros

Performance in army meritorious civilian service medal complex tasks is essential for many high risk operators.The achievement of such tasks is supported by high-level cognitive functions arguably involving functional activity and connectivity in a large ensemble of brain areas that form the fronto-parietal network.Here we aimed at determining whet